Subaru FORESTER 2001 Service Manual
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Subaru FORESTER 2001 Service Manual

Subaru FORESTER 2001 Service Manual

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2001 FORESTER SERVICE MANUAL
ENGINE2 SECTION
This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair of
SUBARU vehicles.
This manual includes the procedures for
maintenance, disassembling, reassem-
bling, inspection and adjustment of com-
ponents and diagnostics for guidance of
experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping their
vehicle in optimum condition. When
replacement of parts during repair work is
needed, be sure to use SUBARU genu-
ine parts.
All information, illustration and specifica-
tions contained in this manual are based
on the latest product information avail-
able at the time of publication approval.
FUJI HEAVY INDUSTRIES LTD.
QUICK REFERENCE INDEX
G8050GE3

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  • Page 1 When replacement of parts during repair work is needed, be sure to use SUBARU genu- ine parts. All information, illustration and specifica- tions contained in this manual are based on the latest product information avail- able at the time of publication approval.

  • Page 2: Table Of Contents

    Engine Control Module (ECM) I/O Signal..........26 Engine Condition Data ................29 Engine Condition Data ................30 Data Link Connector .................33 OBD-II General Scan Tool ................34 Subaru Select Monitor................36 Read Diagnostic Trouble Code ..............43 Inspection Mode ..................44 Clear Memory Mode..................47 Compulsory Valve Operation Check Mode..........48 Engine Malfunction Indicator Lamp (MIL) ..........50...

  • Page 3: Basic Diagnostic Procedure

    OBD-II general scan tool to data link connec- cause. <Ref. to If DTC is not tor. EN(DOHC shown on display 3) Turn ignition switch to ON and the Subaru TURBO)-82, List although the MIL Select Monitor or OBD-II general scan tool of Diagnostic illuminates, per- switch to ON.
  • Page 4 BASIC DIAGNOSTIC PROCEDURE Engine (Diagnostics) 2. AUTOMATIC TRANSMISSION S088501E4502 When trouble code about automatic transmission is shown on display, carry out the following basic check. After that, carry out the replacement or repair work. 1) ATF level check <Ref. to AT-9, Automatic Trans- mission Fluid.>...

  • Page 5: Check List For Interview

    CHECK LIST FOR INTERVIEW Engine (Diagnostics) 2. Check List for Interview S088502 A: CHECK S088502A04 1. CHECK LIST NO. 1 S088502A0401 Check the following items when problem has occurred. NOTE: Use copies of this page for interviewing customers. Customer’s name Engine no.
  • Page 6 CHECK LIST FOR INTERVIEW Engine (Diagnostics) 2. CHECK LIST NO. 2 NOTE: S088502A0402 Use copies of this page for interviewing customers. Check the following items about the vehicle’s state when MIL turns on. a) Other warning lights or indicators turn on. „ Yes/„ No „...

  • Page 7: General Description

    GENERAL DESCRIPTION Engine (Diagnostics) 3. General Description 8) Use ECM mounting stud bolts at the body head S088001 grounding point when measuring voltage and A: CAUTION resistance inside the passenger compartment. S088001A03 1) Airbag system wiring harness is routed near the engine control module (ECM), main relay and fuel pump relay.
  • Page 8 ¼ The OBD-II system is capable of communication with a general scan tool (OBD-II general scan tool) formed by ISO 9141 CARB. ¼ The OBD-II diagnostics procedure is different from the usual diagnostics procedure. When troubleshooting OBD-II vehicles, connect Subaru EN(DOHC TURBO)-7...
  • Page 9 GENERAL DESCRIPTION Engine (Diagnostics) ¼ Reduced emission of harmful exhaust gases. Select Monitor or the OBD-II general scan tool to ¼ Reduced in fuel consumption. the vehicle. ¼ Increased engine output. 2. ENGINE AND EMISSION CONTROL ¼ Superior acceleration and deceleration. SYSTEM ¼...
  • Page 10 GENERAL DESCRIPTION Engine (Diagnostics) MEMO: EN(DOHC TURBO)-9...

  • Page 11: Electrical Components Location

    ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) 4. Electrical Components Location S088507 A: LOCATION S088507A13 1. ENGINE S088507A1301 ¼ MODULE S2M0226H S2M1401E (1) Engine control module (ECM) (3) Data link connector (2) CHECK ENGINE malfunction (4) Test mode connector indicator lamp (MIL) EN(DOHC TURBO)-10...
  • Page 12 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) B3M1575A S2M2215A S2M2157A S2M2244B EN(DOHC TURBO)-11...
  • Page 13 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) ¼ SENSOR S2M2216A (1) Pressure sensor (4) Knock sensor (7) Mass air flow and intake air tem- (2) Engine coolant temperature sen- (5) Camshaft position sensor perature sensor (6) Crankshaft position sensor (8) Tumble generator valve position (3) Throttle position sensor sensor EN(DOHC TURBO)-12...
  • Page 14 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) EN1008 EN1009 EN1010 EN1011 EN1012 EN1013 EN1014 EN1015 EN(DOHC TURBO)-13...
  • Page 15 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) ¼ Australia Model S2M2258A ¼ Except Australia Model S2M2259A (1) Front oxygen (A/F) sensor (4) Front catalytic converter (6) Rear catalytic converter (2) Precatalytic converter (5) Rear oxygen sensor (Except Australia model) (3) Exhaust temperature sensor EN(DOHC TURBO)-14...
  • Page 16 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) EN1016 EN1017 EN0949 EN1018 EN0950 EN(DOHC TURBO)-15...
  • Page 17 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) S2M2217A S2M2218A (1) Fuel level sensor (2) Fuel sub level sensor EN1036 EN1037 EN(DOHC TURBO)-16...
  • Page 18 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) MEMO: EN(DOHC TURBO)-17...
  • Page 19 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) ¼ SOLENOID VALVE, ACTUATOR, EMISSION CONTROL SYSTEM PARTS AND IGNITION SYSTEM PARTS S2M2216B (1) Wastegate control solenoid valve (3) Purge control solenoid valve (5) Tumble generator valve actuator (2) Idle air control solenoid valve (4) Ignition coil EN(DOHC TURBO)-18...
  • Page 20 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) EN1021 EN1022 EN1023 EN1024 EN0952 EN(DOHC TURBO)-19...
  • Page 21 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) S2M2217B S2M2218B (1) Fuel pump (4) Inhibitor switch (7) Starter (2) Main relay (5) Radiator main fan relay (3) Fuel pump relay (6) Radiator sub fan relay EN(DOHC TURBO)-20...
  • Page 22 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) EN0953 S2M0278B S2M0663A B2M2246G EN0746 EN1030 EN(DOHC TURBO)-21...
  • Page 23 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) 2. TRANSMISSION S088507A1302 ¼ MODULE S2M2217C S2M2218C (1) Transmission Control Module (2) AT diagnostic indicator light (for (TCM) (for AT vehicles) AT vehicles) EN(DOHC TURBO)-22...
  • Page 24 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) B3M1592D B3M1652B S2M2215B EN(DOHC TURBO)-23...
  • Page 25 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) ¼ SENSOR B2M2258A B2M2259A B2M2260A B2M2261A OBD0653B (1) Rear vehicle speed sensor (for AT vehicles) (2) Front vehicle speed sensor (for MT vehicles) (3) Front vehicle speed sensor (for AT vehicles) (4) Torque converter turbine speed sensor (5) ATF temperature sensor (for AT vehicles) (6) Brake light switch EN(DOHC TURBO)-24...
  • Page 26 ELECTRICAL COMPONENTS LOCATION Engine (Diagnostics) ¼ SOLENOID VALVE AND SWITCH (AT VEHICLES) B2M2246F B2M2263K B2M2264F (1) Inhibitor switch (2) Shift solenoid valve 1 (3) Shift solenoid valve 2 (4) Line pressure duty solenoid (5) Lock-up duty solenoid (6) Transfer duty solenoid (7) 2-4 brake duty solenoid (8) Low clutch timing solenoid valve (9) 2-4 brake timing solenoid valve...

  • Page 27: Engine Control Module (Ecm) I/O Signal

    ENGINE CONTROL MODULE (ECM) I/O SIGNAL Engine (Diagnostics) 5. Engine Control Module (ECM) I/O Signal S088526 A: ELECTRICAL SPECIFICATION S088526A08 EN0955 Signal (V) Con- Termi- Content nector Note Ignition SW ON nal No. Engine ON (Idling) (Engine OFF) Signal (+) B135 −7 —...
  • Page 28 ENGINE CONTROL MODULE (ECM) I/O SIGNAL Engine (Diagnostics) Signal (V) Con- Termi- Content nector Note Ignition SW ON nal No. Engine ON (Idling) (Engine OFF) Signal — 0.3 — 4.5 — Mass air Shield — flow sensor — Intake air temperature B135 —...
  • Page 29 ENGINE CONTROL MODULE (ECM) I/O SIGNAL Engine (Diagnostics) Signal (V) Con- Termi- Content nector Note Ignition SW ON nal No. Engine ON (Idling) (Engine OFF) B137 10 — 13 1 — 14 Waveform B136 10 — 13 1 — 14 Waveform Fuel injec- B136...

  • Page 30: Engine Condition Data

    ENGINE CONDITION DATA Engine (Diagnostics) 6. Engine Condition Data S088530 A: ELECTRICAL SPECIFICATION S088530A08 Content Specified data 1.6 — 2.9 (%): Idling Engine load 6.4 — 12.8 (%): 2,500 rpm racing Measuring condition: ¼ After warm-up the engine. ¼ Gear position is in neutral position. ¼...

  • Page 31: Engine Condition Data

    ENGINE CONDITION DATA Engine (Diagnostics) 7. Engine Condition Data S088506 A: ELECTRICAL SPECIFICATION S088506A08 TR0532 Check with ignition switch ON. Con- Termi- Resistance to Content nector Measuring conditions Voltage (V) nal No. body (ohms) Back-up power supply Ignition switch OFF 10 —...
  • Page 32 ENGINE CONDITION DATA Engine (Diagnostics) Check with ignition switch ON. Con- Termi- Resistance to Content nector Measuring conditions Voltage (V) nal No. body (ohms) ABS switch ON Less than 1 ABS signal — ABS switch OFF 6.5 — 15 Hold switch ON Less than 1 Hold switch —...
  • Page 33 6 — 9.1 FWD switch — Fuse installed. Less than 1 Fuse ONFWD switch Less than 1 FWD indicator light — Fuse removed from FWD More than 9 switch — — Data link signal (Subaru — Select Monitor) — — EN(DOHC TURBO)-32...

  • Page 34: Data Link Connector

    This connector is used both for OBD-II general scan tools and the Subaru Select Monitor. CAUTION: Do not connect any scan tools other than the OBD-II general scan tools and the Subaru Select Monitor, because the circuit for the Subaru Select Monitor may be damaged.

  • Page 35: Obd-Ii General Scan Tool

    OBD-II GENERAL SCAN TOOL Engine (Diagnostics) 9. OBD-II General Scan Tool 3) Using the OBD-II general scan tool, call up S088527 diagnostic trouble code(s) and freeze frame data. A: OPERATION OBD-II general scan tool functions consist of: S088527A16 (1) MODE $01: Current powertrain diagnostic 1.
  • Page 36 OBD-II GENERAL SCAN TOOL Engine (Diagnostics) 3. MODE $02 (POWERTRAIN FREEZE FRAME DATA) S088527A1603 Refers to data denoting the operating condition when trouble is sensed by the on-board diagnosis system. A list of the support data and PID (Parameter Identification) codes are shown in the following table. Data Unit of measure Trouble code that caused CARB required freeze frame data storage...

  • Page 37: Subaru Select Monitor

    SUBARU SELECT MONITOR Engine (Diagnostics) 10. Subaru Select Monitor CAUTION: S088503 Do not connect scan tools except for Subaru A: OPERATION Select Monitor and OBD-II general scan tool. S088503A16 5) Turn ignition switch to ON (engine OFF) and 1. HOW TO USE SUBARU SELECT Subaru Select Monitor switch to ON.
  • Page 38 SUBARU SELECT MONITOR Engine (Diagnostics) 4. READ CURRENT DATA FOR ENGINE. (NORMAL MODE) S088503A1604 1) On the Main Menu display screen, select the {Each System Check} and press the [YES] key. 2) On the System Selection Menu display screen, select the {Engine Control System} and press the [YES] key.
  • Page 39 Blower Fan SW ON or OFF Small light switch signal Light Switch ON or OFF Tumble generator valve output signal TGV Output ON or OFF NOTE: For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. EN(DOHC TURBO)-38...
  • Page 40 Rear oxygen sensor output signal Oxygen Sensor #12 Air fuel ratio correction by rear oxygen sensor Short term fuel trim #12 On-board diagnostic system OBD System — NOTE: For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. EN(DOHC TURBO)-39...
  • Page 41 Engine Speed Vehicle speed signal Vehicle Speed km/h or MPH NOTE: For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. 7. READ OXYGEN SENSOR MONITORING TEST RESULTS DATA FOR ENGINE. (OBD MODE) S088503A1607 1) On the Main Menu display screen, select the {Each System Check} and press the [YES] key.
  • Page 42 ON or OFF When TGV actuator signal is entered. signal Tumble generator valve drive sig- TGV Drive ON or OFF When TGV moves and valve opens. NOTE: For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. EN(DOHC TURBO)-41...
  • Page 43 ON or OFF Low clutch timing control solenoid valve Low Clutch Timing Sol. ON or OFF Automatic transmission diagnosis indicator lamp AT Diagnosis Lamp ON or OFF NOTE: For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. EN(DOHC TURBO)-42...

  • Page 44: Read Diagnostic Trouble Code

    A: OPERATION For details concerning diagnostic trouble codes, S088508A16 refer to the List of Diagnostic Trouble Code (DTC). 1. SUBARU SELECT MONITOR (NORMAL <Ref. to EN(DOHC TURBO)-82, List of Diagnostic MODE) S088508A1601 Trouble Code (DTC).> 1) On the...

  • Page 45: Inspection Mode

    INSPECTION MODE Engine (Diagnostics) 12. Inspection Mode 1) Prepare Subaru Select Monitor kit. <Ref. to S088510 EN(DOHC TURBO)-8, PREPARATION TOOL, A: OPERATION General Description.> S088510A16 1. PREPARATION FOR THE INSPECTION MODE S088510A1601 Raise the vehicle using a garage jack and place on safety stands or drive the vehicle onto free rollers.
  • Page 46 INSPECTION MODE Engine (Diagnostics) 5) Connect Subaru Select Monitor to data link NOTE: ¼ For detailed operation procedure, refer to the connector. (1) Connect Subaru Select Monitor to data link SUBARU SELECT MONITOR OPERATION connector (A) located in the lower portion of the MANUAL.
  • Page 47 INSPECTION MODE Engine (Diagnostics) ¼ Depress clutch pedal when starting the engine. (MT vehicles) 4) Using the selector lever or shift lever, turn the “P” position switch and the “N” position switch to 5) Depress the brake pedal to turn the brake switch ON.

  • Page 48: Clear Memory Mode

    {Clear Memory} and press the [YES] key. 5) When the ‘Done’ and ‘Turn Ignition Switch OFF’ are shown on the display screen, turn the Subaru Select Monitor and ignition switch to OFF. NOTE: ¼ For detailed operation procedure, refer to the...

  • Page 49: Compulsory Valve Operation Check Mode

    COMPULSORY VALVE OPERATION CHECK MODE Engine (Diagnostics) 14. Compulsory Valve 5) Connect Subaru Select Monitor to data link connector. Operation Check Mode (1) Connect Subaru Select Monitor to data link S088528 connector (A) located in the lower portion of the...
  • Page 50 PCV Solenoid Valve Vent Control Solenoid Valve FICD Solenoid Pressure Switching Sol. 1 Pressure Switching Sol. 2 AAI Solenoid Valve Fuel Tank Sensor Control Valve ¼ For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. EN(DOHC TURBO)-49...

  • Page 51: Engine Malfunction Indicator Lamp (Mil)

    ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) 15. Engine Malfunction Indicator Lamp (MIL) S088653 A: PROCEDURE S088653E45 1. Activation of check engine malfunction indicator lamp (MIL). <Ref. to EN(DOHC TURBO)-51, ACTIVATION OF CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL), Engine Malfunction Indicator Lamp (MIL).> ↓...
  • Page 52 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) 4) When ignition switch is turned to ON (engine B: ACTIVATION OF CHECK ENGINE off) or to “START” with the test mode connector MALFUNCTION INDICATOR LAMP connected, the MIL blinks at a cycle of 3 Hz. (MIL) S088653E89 1) When ignition switch is turned to ON (engine...
  • Page 53 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) C: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT COME ON. S088653E90 ¼ DIAGNOSIS: ¼ The CHECK ENGINE malfunction indicator lamp (MIL) circuit is open or shorted. ¼ TROUBLE SYMPTOM: ¼ When ignition switch is turned ON (engine OFF), MIL does not come on. ¼...
  • Page 54 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) Step Check CHECK OUTPUT SIGNAL FROM ECM. Is the voltage less than 1 Go to step 4. Go to step 2. 1) Turn ignition switch to ON. 2) Measure voltage between ECM connector and chassis ground.
  • Page 55 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN COMBINA- Is voltage more than 10 V? Go to step 7. Check the follow- TION METER AND IGNITION SWITCH CON- ing and repair if NECTOR. necessary. 1) Turn ignition switch to ON. NOTE: ¼...
  • Page 56 ¼ The CHECK ENGINE malfunction indicator lamp (MIL) circuit is shorted. ¼ TROUBLE SYMPTOM: ¼ Although MIL comes on when engine runs, trouble code is not shown on Subaru select monitor or OBD-II general scan tool display. ¼ WIRING DIAGRAM:...
  • Page 57 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) E: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT BLINK AT A CYCLE OF 3 Hz. S088653E92 ¼ DIAGNOSIS: ¼ The CHECK ENGINE malfunction indicator lamp (MIL) circuit is open or shorted. ¼ Test mode connector circuit is in open. ¼...
  • Page 58 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) ¼ WIRING DIAGRAM: S2M2180 EN(DOHC TURBO)-57...
  • Page 59 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) Step Check CHECK STATUS OF CHECK ENGINE MAL- Does the MIL come on? Go to step 2. Repair the MIL FUNCTION INDICATOR LAMP (MIL). circuit. <Ref. to 1) Turn ignition switch to OFF. EN(DOHC 2) Disconnect test mode connector.
  • Page 60 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-59...
  • Page 61 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) F: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) REMAINS BLINKING AT A CYCLE OF 3 Hz. S088653E93 ¼ DIAGNOSIS: ¼ Test mode connector circuit is shorted. ¼ TROUBLE SYMPTOM: ¼ MIL blinks at a cycle of 3 Hz when ignition switch is turned to ON. ¼...
  • Page 62 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) Step Check CHECK TEST MODE CONNECTOR. Does MIL flash on and off? Go to step 2. System is in good 1) Disconnect test mode connector. order. 2) Turn ignition switch to ON. NOTE: MIL blinks at a cycle of 3 Hz when test mode...
  • Page 63 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-62...

  • Page 64: Diagnostics For Engine Starting Failure

    DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) 16. Diagnostics for Engine Starting Failure S088533 A: PROCEDURE S088533E45 1. Inspection of starter motor circuit. <Ref. to EN(DOHC TURBO)-64, STARTER MOTOR CIRCUIT, Diagnostics for Engine Starting Failure.> ↓ 2. Inspection of ECM power supply and ground line. <Ref. to EN(DOHC TURBO)-68, CONTROL MODULE POWER SUP- PLY AND GROUND LINE, Diagnostics for Engine Starting Failure.>...
  • Page 65 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) B: STARTER MOTOR CIRCUIT S088533E94 CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(DOHC TURBO)-47, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>. ¼...

  • Page 66: Diagnostics For Engine Starting Failure

    DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) Step Check CHECK OPERATION OF STARTER MOTOR. Does starter motor operate Go to step 2. Go to step 3. when the switch starts? Record DTC. Go to step 3. CHECK DTC. Is the trouble code stored <Ref.
  • Page 67 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) Step Check CHECK TRANSMISSION TYPE. Is the vehicle AT? Go to step 10. Repair open cir- cuit between igni- tion switch and starter motor cir- cuit. CHECK INHIBITOR SWITCH CIRCUIT. Is the resistance less than Repair open cir- Go to step 11.
  • Page 68 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) MEMO: EN(DOHC TURBO)-67...
  • Page 69 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) C: CONTROL MODULE POWER SUPPLY AND GROUND LINE S088533E37 CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(DOHC TURBO)-47, Clear Memory Mode.> and INSPECTION MODE. <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>...
  • Page 70 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) ¼ RHD MODEL S2M2183 EN(DOHC TURBO)-69...
  • Page 71 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) Step Check CHECK MAIN RELAY. Is the resistance less than Go to step 2. Replace main 10 Ω? 1) Turn the ignition switch to OFF. relay. 2) Remove main relay. 3) Connect battery to main relay terminals No. 1 and No.
  • Page 72 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) Step Check CHECK INPUT VOLTAGE OF MAIN RELAY. Is the voltage more than 10 Go to step 9. Repair open or Measure voltage between main relay connec- ground short cir- tor and chassis ground. cuit in harness of Connector &...
  • Page 73 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) D: IGNITION CONTROL SYSTEM S088533E95 CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(DOHC TURBO)-47, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>. ¼...
  • Page 74 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) ¼ RHD MODEL EN0962 Step Check CHECK SPARK PLUG CONDITION. Is spark plug’s status OK? Go to step 2. Replace spark 1) Remove spark plug. <Ref. to IG(DOHC plug TURBO)-4, Spark Plug.> 2) Check spark plug condition. <Ref. to IG(DOHC TURBO)-4, Spark Plug.>...
  • Page 75 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) Step Check CHECK POWER SUPPLY CIRCUIT FOR Is the voltage more than 10 Go to step 4. Repair harness IGNITION COIL & IGNITOR ASSEMBLY. and connector. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from ignition coil &...
  • Page 76 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) MEMO: EN(DOHC TURBO)-75...
  • Page 77 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) E: FUEL PUMP CIRCUIT S088533E96 CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(DOHC TURBO)-47, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>. ¼...
  • Page 78 NOTE: CIRCUIT, Diag- nostic Procedure Fuel pump operation can also be executed nostics for Engine with Diagnostic using Subaru Select Monitor (Function mode: Starting Failure.> Trouble Code FD01). (DTC).> For the procedure, refer to “Compulsory Valve Operation Check Mode”. <Ref. to EN(DOHC TURBO)-48, Compulsory Valve Operation Check Mode.>...
  • Page 79 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) F: FUEL INJECTOR CIRCUIT S088533E97 CAUTION: ¼ Check or repair only faulty parts. ¼ After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(DOHC TURBO)-47, Clear Memory Mode.> and INSPECTION MODE. <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>...
  • Page 80 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) ¼ WIRING DIAGRAM: ¼ LHD MODEL S2M2186 EN(DOHC TURBO)-79...
  • Page 81 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) ¼ RHD MODEL EN0965 Step Check CHECK OPERATION OF EACH FUEL Is the fuel injector emits Check fuel pres- Go to step 2. INJECTOR. “operating” sound? sure. <Ref. to While cranking the engine, check that each ME(DOHC fuel injector emits “operating”...
  • Page 82 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (Diagnostics) Step Check CHECK POWER SUPPLY TO EACH FUEL Is the voltage more than 10 Go to step 3. Repair harness INJECTOR. and connector. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from #1 cylinder fuel In this case, injector.

  • Page 83: List Of Diagnostic Trouble Code (Dtc)

    LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) 17. List of Diagnostic Trouble Code (DTC) S088525 A: LIST S088525A12 Item Index P0031 Front oxygen (A/F) sensor heater <Ref. to EN(DOHC TURBO)-90, DTC P0031 — FRONT OXYGEN (A/F) circuit low input SENSOR HEATER CIRCUIT LOW INPUT —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 84 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Item Index P0123 Throttle position sensor circuit high <Ref. to EN(DOHC TURBO)-142, DTC P0123 — THROTTLE POSITION input SENSOR CIRCUIT HIGH INPUT —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P0125 Insufficient coolant temperature for <Ref.
  • Page 85 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Item Index P0336 Crankshaft position sensor circuit <Ref. to EN(DOHC TURBO)-188, DTC P0336 — CRANKSHAFT POSI- range/performance problem TION SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM —, Diag- nostic Procedure with Diagnostic Trouble Code (DTC).> P0340 Camshaft position sensor circuit <Ref.
  • Page 86 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Item Index P0545 Exhaust gas temperature sensor <Ref. to EN(DOHC TURBO)-242, DTC P0545 — EXHAUST GAS TEM- circuit low input PERATURE SENSOR CIRCUIT LOW INPUT —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P0546 Exhaust gas temperature sensor <Ref.
  • Page 87 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Item Index P1089 Tumble generator valve #1 (RH) <Ref. to EN(DOHC TURBO)-270, DTC P1089 — TUMBLE GENERATOR position sensor circuit high input VALVE #1 (RH) POSITION SENSOR CIRCUIT HIGH INPUT —, Diagnos- tic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 88 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Item Index P1244 Wastegate control solenoid valve <Ref. to EN(DOHC TURBO)-304, DTC P1244 — WASTEGATE CON- malfunction (low input) TROL SOLENOID VALVE RANGE/PERFORMANCE PROBLEM (LOW INPUT) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P1245 Wastegate control solenoid valve <Ref.
  • Page 89 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Item Index P1701 Cruise control set signal circuit mal- <Ref. to EN(DOHC TURBO)-338, DTC P1701 — CRUISE CONTROL SET function for automatic transmission SIGNAL CIRCUIT MALFUNCTION FOR AUTOMATIC TRANSMISSION —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P1703 Low clutch timing control solenoid <Ref.
  • Page 90 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-89...

  • Page 91: Diagnostic Procedure With Diagnostic Trouble Code (Dtc)

    DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) 18. Diagnostic Procedure with Diagnostic Trouble Code (DTC) S088521 A: DTC P0031 — FRONT OXYGEN (A/F) SENSOR HEATER CIRCUIT LOW INPUT — S088521F83 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 92 Repair poor con- Go to step 5. 1) Start engine tact in connector. 2) Read data of front oxygen (A/F) sensor NOTE: heater current using Subaru Select Monitor or In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼...
  • Page 93 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK OUTPUT SIGNAL FROM ECM. Does the voltage change Repair poor con- Go to step 7. Measure voltage between ECM connector less than 1.0 V by shaking tact in ECM con- and chassis ground.
  • Page 94 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-93...
  • Page 95 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) B: DTC P0032 — FRONT OXYGEN (A/F) SENSOR HEATER CIRCUIT HIGH INPUT — S088521F84 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 96 Module.> 3) Turn ignition switch to ON. 4) Read data of front oxygen (A/F) sensor heater current using Subaru Select Monitor or the OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 97 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) C: DTC P0037 — REAR OXYGEN SENSOR HEATER CIRCUIT MALFUNCTION — S088521F85 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 98 Repair connector. Go to step 3. 1) Start engine. NOTE: 2) Read data of rear oxygen sensor heater In this case, current using Subaru Select Monitor or OBD-II repair the follow- general scan tool. ing: ¼ Poor contact in NOTE: ¼...
  • Page 99 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK POWER SUPPLY TO REAR OXY- Is the voltage more than 10 Go to step 7. Repair power sup- GEN SENSOR. ply line. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from rear oxygen In this case,...
  • Page 100 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-99...
  • Page 101 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) D: DTC P0038 — REAR OXYGEN SENSOR HEATER CIRCUIT HIGH INPUT — S088521F86 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 102 Engine Control 3) Turn ignition switch to ON. Module.> 4) Read data of rear oxygen sensor heater current using Subaru Select Monitor or the OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 103 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) E: DTC P0101 — MASS AIR FLOW SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) — S088521B08 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 104 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace mass air Monitor or OBD-II general P0102 or P0103 flow and intake air scan tool indicate DTC using “List of...
  • Page 105 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) F: DTC P0102 — MASS AIR FLOW SENSOR CIRCUIT LOW INPUT — S088521B09 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼...
  • Page 106 A tem- OBD-II general scan tool to data link connec- porary poor con- tor. tact of the con- 3) Turn ignition switch to ON and Subaru nector or harness Select Monitor or the OBD-II general scan may be the cause. Repair tool switch to ON.
  • Page 107 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 6. Repair open cir- MASS AIR FLOW SENSOR CONNECTOR. 1Ω? cuit between ECM 1) Turn ignition switch to OFF. and mass air flow 2) Disconnect connector from ECM.
  • Page 108 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-107...
  • Page 109 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) G: DTC P0103 — MASS AIR FLOW SENSOR CIRCUIT HIGH INPUT — S088521B10 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼...
  • Page 110 (32 lb/min) or 4.58 V? this time. OBD-II general scan tool to data link connec- tor. 3) Turn ignition switch to ON and Subaru Select Monitor or the OBD-II general scan tool switch to ON. 4) Start engine. 5) Read data of mass air flow sensor signal using Subaru Select Monitor or OBD-II gen- eral scan tool.
  • Page 111 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) H: DTC P0106 — PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) — S088521F90 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 112 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL: S2M2191 EN(DOHC TURBO)-111...
  • Page 113 Check throttle 1) Turn ignition switch to ON. Switch Signal} come on? position sensor 2) Operate the LED operation mode for circuit. <Ref. to engine using Subaru Select Monitor. EN(DOHC NOTE: TURBO)-136, ¼ Subaru Select Monitor DTC P0121 - For detailed operation procedure, refer to the THROTTLE “LED OPERATION MODE FOR ENGINE”.
  • Page 114 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-113...
  • Page 115 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) I: DTC P0107 — PRESSURE SENSOR CIRCUIT LOW INPUT — S088521B12 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 116 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2191 EN(DOHC TURBO)-115...
  • Page 117 Go to step 2. 1) Start engine. kPa (−54 mmHg, −2.1 2) Read the data of intake manifold absolute inHg)? pressure signal using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 118 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 8. Repair open cir- 1 Ω? PRESSURE SENSOR CONNECTOR. cuit in harness 1) Turn ignition switch to OFF. between ECM 2) Disconnect connector from ECM.
  • Page 119 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) J: DTC P0108 — PRESSURE SENSOR CIRCUIT HIGH INPUT — S088521B13 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 120 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2191 EN(DOHC TURBO)-119...
  • Page 121 Go to step 2. 1) Start engine. kPa (2,121 mmHg, 83.50 2) Read the data of intake manifold absolute inHg)? pressure signal using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 122 Repair battery Replace pressure PRESSURE SENSOR CONNECTOR. kPa (2,121 mmHg, 83.50 short circuit in sensor. <Ref. to 1) Turn ignition switch to OFF and Subaru inHg)? harness between FU(DOHC Select Monitor or the OBD-II general scan ECM and pres- TURBO)-35, Pres- tool switch to OFF.
  • Page 123 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) K: DTC P0111 — INTAKE AIR TEMPERATURE SENSOR CIRCUIT RANGE/ PERFORMANCE PROBLEM — S088521B14 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 124 1) Start the engine and warm it up completely. (167°F) and 95°C (203°F)? temperature sen- of Diagnostic 2) Measure engine coolant temperature using sor. <Ref. to Trouble Code Subaru Select Monitor or OBD-II general scan FU(DOHC (DTC)”. <Ref. to tool. TURBO)-34, Mass EN(DOHC NOTE:...
  • Page 125 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) L: DTC P0112 — INTAKE AIR TEMPERATURE SENSOR CIRCUIT LOW INPUT — S088521B15 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 126 Repair poor con- 1) Start engine. 55°C (131°F)? tact. 2) Read data of intake air temperature sensor NOTE: signal using Subaru Select Monitor or the In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼ Subaru Select Monitor ¼...
  • Page 127 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) M: DTC P0113 — INTAKE AIR TEMPERATURE SENSOR CIRCUIT HIGH INPUT — S088521B16 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 128 Repair poor con- 1) Start engine. −36°C (−33°F)? tact. 2) Read data of intake air temperature sensor NOTE: signal using Subaru Select Monitor or the In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼ Subaru Select Monitor ¼...
  • Page 129 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN MASS AIR Is the resistance less than Replace mass air Repair harness 5 Ω? FLOW AND INTAKE AIR TEMPERATURE flow and intake air and connector. SENSOR AND ECM CONNECTOR. temperature sen- NOTE: 1) Turn ignition switch to OFF.
  • Page 130 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-129...
  • Page 131 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) N: DTC P0117 — ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT LOW INPUT — S088521F91 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Hard to start ¼ Erroneous idling ¼...
  • Page 132 Repair poor con- 1) Start engine. 150°C (302°F)? tact. 2) Read data of engine coolant temperature NOTE: sensor signal using Subaru Select Monitor or In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼ Subaru Select Monitor ¼...
  • Page 133 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) O: DTC P0118 — ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT HIGH INPUT — S088521F92 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Hard to start ¼ Erroneous idling ¼...
  • Page 134 Repair poor con- 1) Start engine. −40°C (−40°F)? tact. 2) Read data of engine coolant temperature NOTE: sensor signal using Subaru Select Monitor or In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼ Subaru Select Monitor ¼...
  • Page 135 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ENGINE Is the resistance less than Replace engine Repair harness 5 Ω? COOLANT TEMPERATURE SENSOR AND coolant tempera- and connector. ECM CONNECTOR. ture sensor. <Ref. NOTE: 1) Turn ignition switch to OFF.
  • Page 136 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-135...
  • Page 137 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) P: DTC P0121 — THROTTLE POSITION SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) — S088521B19 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 138 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2194 Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace throttle Monitor or OBD-II general P0122, P0123 or position sensor. scan tool indicate DTC P1507 using “...
  • Page 139 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Q: DTC P0122 — THROTTLE POSITION SENSOR CIRCUIT LOW INPUT — S088521B20 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 140 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2194 EN(DOHC TURBO)-139...
  • Page 141 Even if MIL lights 1) Start engine. up, the circuit has 2) Read data of throttle position sensor signal returned to a nor- using Subaru Select Monitor or OBD-II gen- mal condition at eral scan tool. this time. A tem- NOTE: porary poor con- ¼...
  • Page 142 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage more than Go to step 7. Repair harness THROTTLE POSITION SENSOR CONNEC- 4.5 V? and connector. TOR. NOTE: 1) Turn ignition switch to OFF. In this case, 2) Disconnect connectors from throttle posi- repair the follow-...
  • Page 143 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) R: DTC P0123 — THROTTLE POSITION SENSOR CIRCUIT HIGH INPUT — S088521B21 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 144 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2194 EN(DOHC TURBO)-143...
  • Page 145 Even if MIL lights 1) Start engine. up, the circuit has 2) Read data of throttle position sensor signal returned to a nor- using Subaru Select Monitor or OBD-II gen- mal condition at eral scan tool. this time. A tem- NOTE: porary poor con- ¼...
  • Page 146 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-145...
  • Page 147 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) S: DTC P0125 — INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL — S088521B22 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Engine would not return to idling. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 148 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0117 or P0118 scan tool indicate DTC using “List of...
  • Page 149 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) T: DTC P0131 — FRONT OXYGEN (A/F) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) — S088521B24 NOTE: For the diagnostic procedure, refer to DTC P0132. <Ref. to EN(DOHC TURBO)-150, DTC P0132 — FRONT OXYGEN (A/F) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 150 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-149...
  • Page 151 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) U: DTC P0132 — FRONT OXYGEN (A/F) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) — S088521B25 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 152 DATA. more than 0.85 and equal 1) Start engine. to less than 1.15 in idling? 2) While observing the Subaru Select Monitor or OBD-II general scan tool screen, warm-up the engine until coolant temperature is above 70°C (158°F). If the engine is already warmed-up, operate at idle speed for at least 1 minute.
  • Page 153 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) V: DTC P0133 — FRONT OXYGEN (A/F) SENSOR CIRCUIT SLOW RESPONSE — S088521B26 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 154 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0031, P0032, scan tool indicate DTC P0131, P0132, P0031, P0032, P0131,...
  • Page 155 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) W: DTC P0136 — REAR OXYGEN SENSOR CIRCUIT MALFUNCTION — S088521B28 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 156 70°C (158°F), and keep the engine speed at 2,000 rpm to 3,000 rpm for two minutes. 2) Read data of rear oxygen sensor signal using Subaru Select Monitor or OBD-II gen- eral scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA SHOWN ON DIS-...
  • Page 157 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK EXHAUST SYSTEM. Is there a fault in exhaust Repair or replace Replace rear oxy- Check exhaust system parts. system? faulty parts. gen sensor. <Ref. NOTE: to FU(DOHC Check the following items. TURBO)-44, Rear ¼...
  • Page 158 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-157...
  • Page 159 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) X: DTC P0139 — REAR OXYGEN SENSOR CIRCUIT SLOW RESPONSE — S088521B29 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 160 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace rear oxy- Monitor or OBD-II general P0136 using “List gen sensor. <Ref. scan tool indicate DTC...
  • Page 161 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Y: DTC P0171 — FUEL TRIM MALFUNCTION (A/F TOO LEAN) — S088521B33 NOTE: For the diagnostic procedure, refer to DTC P0172. <Ref. to EN(DOHC TURBO)-161, DTC P0172 — FUEL TRIM MALFUNCTION (A/F TOO RICH) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> EN(DOHC TURBO)-160...
  • Page 162 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Z: DTC P0172 — FUEL TRIM MALFUNCTION (A/F TOO RICH) — S088521B32 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼...
  • Page 163 60°C (140°F)? coolant tempera- 1) Start the engine and warm-up completely. ture sensor. <Ref. 2) Read data of engine coolant temperature to FU(DOHC sensor signal using Subaru Select Monitor or TURBO)-29, OBD-II general scan tool. Engine Coolant NOTE: Temperature Sen- ¼...
  • Page 164 5) Open front hood. parts. perature Sensor.> 6) Measure ambient temperature. 7) Read data of intake manifold pressure sen- sor signal using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 165 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AA: DTC P0244 — WASTEGATE CONTROL SOLENOID VALVE MALFUNCTION (HIGH INPUT) — S088521H65 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼...
  • Page 166 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace waste- Monitor or OBD-II general P0245 or P0246 gate control sole- scan tool indicate DTC using “List of noid valve.
  • Page 167 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AB: DTC P0245 — WASTEGATE CONTROL SOLENOID VALVE CIRCUIT LOW INPUT — S088521H66 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 168 2) Measure voltage between ECM and chas- returned to a nor- sis ground. mal condition at Connector & terminal this time. Contact (B137) No. 24 (+) — Chassis ground with your Subaru (−): distributor. NOTE: Inspection by DTM is required, because probable...
  • Page 169 CHECK POOR CONTACT. Is there poor contact in Repair poor con- Contact your Check poor contact in wastegate control sole- wastegate control solenoid tact in wastegate Subaru distributor. noid valve connector. valve connector? control solenoid NOTE: valve connector. Inspection by...
  • Page 170 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-169...
  • Page 171 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AC: DTC P0246 — WASTEGATE CONTROL SOLENOID VALVE CIRCUIT HIGH INPUT — S088521H67 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 172 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK OUTPUT SIGNAL FROM ECM. Is the voltage more than 10 Go to step 3. Go to step 2. 1) Turn ignition switch to ON. 2) Measure voltage between ECM and chas- sis ground.
  • Page 173 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AD: DTC P0301 — CYLINDER 1 MISFIRE DETECTED — S088521B37 NOTE: For the diagnostic procedure, refer to DTC P0304. <Ref. to EN(DOHC TURBO)-172, DTC P0304 — CYL- INDER 4 MISFIRE DETECTED —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> AE: DTC P0302 —...
  • Page 174 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: ¼ LHD MODEL S2M2186 EN(DOHC TURBO)-173...
  • Page 175 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL EN0965 EN(DOHC TURBO)-174...
  • Page 176 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0106, P0107, scan tool indicate DTC P0108, P0117, P0106, P0107, P0108,...
  • Page 177 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK FUEL INJECTOR. Is the resistance between 5 Go to step 6. Replace faulty and 20 Ω? Measure resistance between fuel injector ter- fuel injector. <Ref. minals on faulty cylinder. to FU(DOHC Terminals TURBO)-37, Fuel...
  • Page 178 Is the MIL coming on or Go to step 15. Go to step 14. FUNCTION INDICATOR LAMP (MIL). blinking? 1) Clear memory using Subaru Select Moni- tor. <Ref. to EN(DOHC TURBO)-47, Clear Memory Mode.> 2) Start engine, and drive the vehicle more than 10 minutes.
  • Page 179 2) Read diagnostic trouble code (DTC). scan tool indicate only one ¼ Subaru Select Monitor DTC? <Ref. to EN(DOHC TURBO)-36, Subaru Select Monitor.> ¼ OBD-II general scan tool For detailed operation procedures, refer to the OBD-II General Scan Tool Operation Manual.
  • Page 180 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check GROUP OF #1 AND #2 CYLINDERS Are there faults in #1 and Repair or replace Go to DTC P0171 #2 cylinders? faulty parts. and P0172. <Ref. NOTE: to EN(DOHC ¼...
  • Page 181 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check GROUP OF #2 AND #4 CYLINDERS Are there faults in #2 and Repair or replace Go to DTC P0171 #4 cylinders? faulty parts. and P0172. <Ref. NOTE: to EN(DOHC Check the follow- TURBO)-160, ing items.
  • Page 182 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-181...
  • Page 183 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AH: DTC P0327 — KNOCK SENSOR CIRCUIT LOW INPUT — S088521F94 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Poor driving performance ¼ Knocking occurs. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 184 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN KNOCK Is the resistance more than Go to step 2. Repair harness SENSOR AND ECM CONNECTOR. 700 kΩ? and connector. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from ECM.
  • Page 185 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AI: DTC P0328 — KNOCK SENSOR CIRCUIT HIGH INPUT — S088521F95 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Poor driving performance ¼ Knocking occurs. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 186 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN KNOCK Is the resistance less than Go to step 2. Go to step 3. SENSOR AND ECM CONNECTOR. 400 kΩ? Measure resistance of harness between ECM connector and chassis ground.
  • Page 187 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AJ: DTC P0335 — CRANKSHAFT POSITION SENSOR CIRCUIT MALFUNCTION — S088521B42 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine stalls. ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 188 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN CRANK- Is the resistance more than Repair harness Go to step 2. SHAFT POSITION SENSOR AND ECM 100 kΩ? and connector. CONNECTOR. NOTE: 1) Turn ignition switch to OFF. In this case, 2) Disconnect connector from crankshaft posi- repair the follow-...
  • Page 189 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AK: DTC P0336 — CRANKSHAFT POSITION SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM — S088521B43 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine stalls. ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 190 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0335 using “List scan tool indicate DTC of Diagnostic...
  • Page 191 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AL: DTC P0340 — CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION — S088521B44 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine stalls. ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <...
  • Page 192 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN CAMSHAFT Is the resistance more than Repair harness Go to step 2. POSITION SENSOR AND ECM CONNEC- 100 kΩ? and connector. TOR. NOTE: 1) Turn ignition switch to OFF. In this case, 2) Disconnect connector from camshaft posi- repair the follow-...
  • Page 193 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AM: DTC P0341 — CAMSHAFT POSITION SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM — S088521B45 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine stalls. ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <...
  • Page 194 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0340 using “List scan tool indicate DTC of Diagnostic...
  • Page 195 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK CONDITION OF CAMSHAFT POSI- Is the camshaft position Go to step 6. Tighten camshaft TION SENSOR. sensor installation bolt position sensor tightened securely? installation bolt securely. CHECK CAMSHAFT POSITION SENSOR. Is the resistance between 1 Go to step 7.
  • Page 196 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-195...
  • Page 197 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AN: DTC P0420 — CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD — S088521B46 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Engine stalls. ¼ Idle mixture is out of specifications. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 198 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect the rel- Go to step 2. Monitor or OBD-II general evant DTC using scan tool indicate DTC “List of Diagnostic...
  • Page 199 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AO: DTC P0444 — EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT LOW INPUT — S088521G47 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <...
  • Page 200 2) Measure voltage between ECM and chas- returned to a nor- sis ground. mal condition at Connector & terminal this time. Contact (B137) No. 16 (+) — Chassis ground your Subaru dis- (−): tributor. NOTE: Inspection by DTM is required, because probable...
  • Page 201 CHECK POOR CONTACT. Is there poor contact in Repair poor con- Contact your Check poor contact in purge control solenoid purge control solenoid tact in purge con- Subaru distributor. valve connector. valve connector? trol solenoid valve NOTE: connector. Inspection by...
  • Page 202 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-201...
  • Page 203 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AP: DTC P0445 — EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH INPUT — S088521G48 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <...
  • Page 204 ECM and connector. chassis ground. NOTE: Purge control solenoid valve operation can be executed using Subaru Select Monitor. For procedure, refer to “Compulsory Valve Opera- tion Check Mode”. <Ref. to EN(DOHC TURBO)-48, Compulsory Valve Operation Check Mode.>...
  • Page 205 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK POOR CONTACT. Is there poor contact in Repair poor con- Replace ECM. Check poor contact in ECM connector. ECM connector? tact in ECM con- <Ref. to nector. FU(DOHC TURBO)-47, Engine Control Module.>...
  • Page 206 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-205...
  • Page 207 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AQ: DTC P0461 — FUEL LEVEL SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM — S088521B54 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 208 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: S2M2198 EN(DOHC TURBO)-207...
  • Page 209 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace fuel level Monitor or OBD-II general P0462 or P0463 sensor <Ref. to scan tool indicate DTC using “List of...
  • Page 210 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-209...
  • Page 211 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AR: DTC P0462 — FUEL LEVEL SENSOR CIRCUIT LOW INPUT — S088521B55 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 212 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: S2M2198 EN(DOHC TURBO)-211...
  • Page 213 Select Monitor? porary poor con- For detailed operation procedure, refer to the tact of the con- “READ CURRENT DATA FOR ENGINE”. nector may be the <Ref. to EN(DOHC TURBO)-36, Subaru cause. Select Monitor.> NOTE: In this case, repair the follow- ing: ¼...
  • Page 214 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Repair or replace Repair open cir- 10 Ω? COMBINATION METER. combination cuit between ECM Measure resistance between ECM and combi- meter.
  • Page 215 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AS: DTC P0463 — FUEL LEVEL SENSOR CIRCUIT HIGH INPUT — S088521B56 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode<Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 216 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: S2M2198 EN(DOHC TURBO)-215...
  • Page 217 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK SPEEDOMETER AND TACHOM- Does speedometer and Go to step 2. Repair or replace ETER OPERATION IN COMBINATION tachometer operate nor- combination METER. mally? meter. <Ref. to IDI-4, Combina- tion Meter Sys- tem.>...
  • Page 218 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK FUEL TANK CORD. Is the resistance less than Go to step 7. Repair open cir- 10 Ω? 1) Disconnect connector from fuel level sen- cuit between cou- sor. pling connector 2) Measure resistance between fuel level sen- and fuel level sen-...
  • Page 219 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AT: DTC P0464 — FUEL LEVEL SENSOR INTERMITTENT INPUT— S088521G01 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode < Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 220 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: S2M2198 EN(DOHC TURBO)-219...
  • Page 221 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0462 or P0463 scan tool indicate DTC using “List of...
  • Page 222 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-221...
  • Page 223 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AU: DTC P0480 — COOLING FAN RELAY 1 CIRCUIT LOW INPUT — S088521B57 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Radiator fan does not operate properly. ¼...
  • Page 224 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: S2M2199 EN(DOHC TURBO)-223...
  • Page 225 4) While operating radiator fan relay, measure voltage between ECM terminal and ground. NOTE: Radiator fan relay operation can be executed using Subaru Select Monitor. For procedure, refer to “Compulsory Valve Operation Check Mode”. < Ref. to EN(DOHC TURBO)-36, Subaru Select Monitor.>...
  • Page 226 CHECK POOR CONTACT. Is there poor contact in Repair poor con- Contact your Check poor contact in ECM or main fan relay ECM or main fan relay con- tact in ECM or Subaru distributor. connector. nector? main fan relay connector. EN(DOHC TURBO)-225...
  • Page 227 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AV: DTC P0483 — COOLING FAN FUNCTION PROBLEM — S088521B58 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Occurrence of noise ¼ Overheating CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <...
  • Page 228 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: S2M2199 EN(DOHC TURBO)-227...
  • Page 229 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Is there any other DTC on Inspect the rel- Check radiator display? evant DTC using fan, fan motor and “List of Diagnostic thermostat. <Ref. Trouble Code to CO-8, Radiator (DTC)”.
  • Page 230 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-229...
  • Page 231 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AW: DTC P0500 — VEHICLE SPEED SENSOR MALFUNCTION — S088521B59 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 232 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK DTC P0720 ON DISPLAY. Does the Subaru Select Check front Go to step 3. Monitor or OBD-II general vehicle speed scan tool indicate DTC sensor signal cir- P0720? cuit.
  • Page 233 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AX: DTC P0506 — IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED — S088521B61 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Engine is difficult to start. ¼...
  • Page 234 1) Turn ignition switch to ON. 2) Start engine, and warm-up the engine. 3) Turn all accessory switches to OFF. 4) Read data of idle air control solenoid valve duty ratio using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedures, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 235 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AY: DTC P0507 — IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED — S088521B62 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Engine keeps running at higher revolution than specified idling revolution. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <...
  • Page 236 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0508 or P0509 scan tool indicate DTC using “List of...
  • Page 237 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) AZ: DTC P0508 — IDLE CONTROL SYSTEM CIRCUIT LOW INPUT — S088521H68 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼ Engine breathing CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 238 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK OUTPUT SIGNAL FROM ECM. Is the voltage more than 3 Repair poor con- Go to step 2. 1) Turn ignition switch to ON. tact in ECM con- 2) Measure voltage between ECM and chas- nector.
  • Page 239 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BA: DTC P0509 — IDLE CONTROL SYSTEM CIRCUIT HIGH INPUT — S088521H10 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼ Engine breathing CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 240 Does the voltage change Repair battery Contact your Measure voltage between ECM and chassis more than 10 V by shaking short circuit in Subaru distributor. ground. harness and connector of harness between NOTE: Connector & terminal ECM while monitoring the...
  • Page 241 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BB: DTC P0512 — STARTER SWITCH CIRCUIT HIGH INPUT — S088521G02 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 242 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK OPERATION OF STARTER MOTOR. Does starter motor operate Repair battery Check starter NOTE: when ignition switch to short circuit in motor circuit. Place the inhibitor switch in each position. (AT “ON”? starter motor cir- <Ref.
  • Page 243 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BC: DTC P0545 — EXHAUST GAS TEMPERATURE SENSOR CIRCUIT LOW INPUT — S088521H69 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Hard to start ¼ Erroneous idling ¼...
  • Page 244 Repair poor con- 1) Start engine. 1200°C (2192°F)? tact. 2) Read data of exhaust gas temperature NOTE: sensor signal using Subaru Select Monitor or In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼ Subaru Select Monitor ¼...
  • Page 245 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BD: DTC P0546 — EXHAUST GAS TEMPERATURE SENSOR CIRCUIT HIGH INPUT — S088521H70 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Hard to start ¼ Erroneous idling ¼...
  • Page 246 Repair poor con- 1) Start engine. 372°C (702°F)? tact. 2) Read data of exhaust gas temperature NOTE: sensor signal using Subaru Select Monitor or In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼ Subaru Select Monitor ¼...
  • Page 247 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN EXHAUST Is the resistance less than Replace exhaust Repair harness 5 Ω? GAS TEMPERATURE SENSOR AND ECM gas temperature and connector. CONNECTOR. sensor. <Ref. to NOTE: 1) Turn ignition switch to OFF.
  • Page 248 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-247...
  • Page 249 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BE: DTC P0604 — INTERNAL CONTROL MODULE MEMORY CHECK SUM ERROR — S088521G03 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine does not start. ¼ Engine stalls. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 250 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: ¼ LHD MODEL S2M2182 EN(DOHC TURBO)-249...
  • Page 251 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2183 Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Replace ECM. It is not necessary Monitor or OBD-II general <Ref. to to inspect DTC scan tool indicate DTC FU(DOHC P0604.
  • Page 252 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-251...
  • Page 253 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BF: DTC P0703 — BRAKE SWITCH INPUT MALFUNCTION — S088521B64 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 254 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN TCM AND Is the resistance less than Go to step 3. Repair or replace 1 Ω? BRAKE LIGHT SWITCH CONNECTOR. harness and con- 1) Disconnect connectors from TCM and nector.
  • Page 255 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BG: DTC P0731 — GEAR 1 INCORRECT RATIO — S088521B70 NOTE: For the diagnostic procedure, refer to DTC P0734. <Ref. to EN(DOHC TURBO)-255, DTC P0734 — GEAR 4 INCORRECT RATIO —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> BH: DTC P0732 —...
  • Page 256 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BJ: DTC P0734 — GEAR 4 INCORRECT RATIO — S088521B73 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Shift point too high or too low; engine brake not effected in “3” range; excessive shift shock; exces- sive tight corner “braking”...
  • Page 257 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BK: DTC P0741 — TORQUE CONVERTER CLUTCH SYSTEM MALFUNCTION — S088521G04 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ No lock-up (after engine warm-up) ¼...
  • Page 258 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ATF TEMPERATURE SENSOR CIR- Is there any trouble in ATF Repair or replace Go to step 9. CUIT. temperature sensor circuit? ATF temperature Check ATF temperature sensor circuit. <Ref. sensor circuit.
  • Page 259 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BL: DTC P1086 — TUMBLE GENERATOR VALVE #2 (LH) POSITION SENSOR CIRCUIT LOW INPUT — S088521H71 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 260 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2205 EN(DOHC TURBO)-259...
  • Page 261 1) Start engine. up, the circuit has 2) Read data of tumble generator valve posi- returned to a nor- tion sensor signal using Subaru Select Moni- mal condition at tor or OBD-II general scan tool. this time. A tem- NOTE: porary poor con- ¼...
  • Page 262 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage more than Go to step 7. Repair harness TUMBLE GENERATOR VALVE POSITION 4.5 V? and connector. SENSOR CONNECTOR. NOTE: 1) Turn ignition switch to OFF. In this case, 2) Disconnect connectors from tumble gen- repair the follow-...
  • Page 263 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BM: DTC P1087 — TUMBLE GENERATOR VALVE #2 (LH) POSITION SENSOR CIRCUIT HIGH INPUT — S088521H72 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 264 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2205 EN(DOHC TURBO)-263...
  • Page 265 1) Start engine. up, the circuit has 2) Read data of tumble generator valve posi- returned to a nor- tion sensor signal using Subaru Select Moni- mal condition at tor or OBD-II general scan tool. this time. A tem- NOTE: porary poor con- ¼...
  • Page 266 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-265...
  • Page 267 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BN: DTC P1088 — TUMBLE GENERATOR VALVE #1 (RH) POSITION SENSOR CIRCUIT LOW INPUT — S088521H75 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 268 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2207 EN(DOHC TURBO)-267...
  • Page 269 1) Start engine. up, the circuit has 2) Read data of tumble generator valve posi- returned to a nor- tion sensor signal using Subaru Select Moni- mal condition at tor or OBD-II general scan tool. this time. A tem- NOTE: porary poor con- ¼...
  • Page 270 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage more than Go to step 7. Repair harness TUMBLE GENERATOR VALVE POSITION 4.5 V? and connector. SENSOR CONNECTOR. NOTE: 1) Turn ignition switch to OFF. In this case, 2) Disconnect connectors from tumble gen- repair the follow-...
  • Page 271 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BO: DTC P1089 — TUMBLE GENERATOR VALVE #1 (RH) POSITION SENSOR CIRCUIT HIGH INPUT — S088521H76 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 272 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2207 EN(DOHC TURBO)-271...
  • Page 273 1) Start engine. up, the circuit has 2) Read data of tumble generator valve posi- returned to a nor- tion sensor signal using Subaru Select Moni- mal condition at tor or OBD-II general scan tool. this time. A tem- NOTE: porary poor con- ¼...
  • Page 274 47, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>. Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P1088, P1089, scan tool indicate P1088,...
  • Page 275 47, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>. Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P1088, P1089, scan tool indicate P1088,...
  • Page 276 47, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>. Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P1086, P1087, scan tool indicate P1086,...
  • Page 277 47, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>. Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P1086, P1087, scan tool indicate P1086,...
  • Page 278 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-277...
  • Page 279 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BT: DTC P1094 — TUMBLE GENERATOR VALVE CIRCUIT #1 (OPEN CIRCUIT) — S088521H81 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 280 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 2. Repair open cir- TUMBLE GENERATOR VALVE ACTUATOR 1Ω? cuit between ECM CONNECTOR. and tumble gen- 1) Turn ignition switch to OFF.
  • Page 281 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BU: DTC P1095 — TUMBLE GENERATOR VALVE CIRCUIT #1 (OVERCURRENT) — S088521H82 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 282 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage less than Replace tumble Repair battery TUMBLE GENERATOR VALVE ACTUATOR generator valve short circuit CONNECTOR. assembly. <Ref. between ECM 1) Turn ignition switch to OFF. to FU(DOHC and tumble gen- 2) Disconnect connector from tumble genera-...
  • Page 283 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BV: DTC P1096 — TUMBLE GENERATOR VALVE CIRCUIT #2 (OPEN CIRCUIT) — S088521H83 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 284 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 2. Repair open cir- TUMBLE GENERATOR VALVE ACTUATOR 1Ω? cuit between ECM CONNECTOR. and tumble gen- 1) Turn ignition switch to OFF.
  • Page 285 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) BW: DTC P1097 — TUMBLE GENERATOR VALVE CIRCUIT #2 (OVERCURRENT) — S088521H84 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 286 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage less than Replace tumble Repair battery TUMBLE GENERATOR VALVE ACTUATOR generator valve short circuit CONNECTOR. assembly. <Ref. between ECM 1) Turn ignition switch to OFF. to FU(DOHC and tumble gen- 2) Disconnect connector from tumble genera-...
  • Page 287 47, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>. Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Replace ECM. It is not necessary Monitor or OBD-II general <Ref. to to inspect DTC...
  • Page 288 After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(DOHC TURBO)-44, Inspec- tion Mode.>. Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace ECM. Monitor or OBD-II general P0106, P0107, <Ref. to...
  • Page 289 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CA: DTC P1130 — FRONT OXYGEN (A/F) SENSOR CIRCUIT MALFUNCTION (OPEN CIRCUIT) — S088521B92 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 290 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 2. Repair harness 1 Ω? FRONT OXYGEN (A/F) SENSOR CONNEC- and connector. TOR. NOTE: 1) Turn ignition switch to OFF. In this case, 2) Disconnect connectors from ECM and front repair the follow-...
  • Page 291 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CB: DTC P1131 — FRONT OXYGEN (A/F) SENSOR CIRCUIT MALFUNCTION (SHORT CIRCUIT) — S088521B93 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 292 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance more than Go to step 2. Repair ground 10 Ω? FRONT OXYGEN (A/F) SENSOR CONNEC- short circuit in TOR. harness between 1) Turn ignition switch to OFF.
  • Page 293 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CC: DTC P1134 — FRONT OXYGEN (A/F) SENSOR MICRO-COMPUTER PROBLEM — S088521B96 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 294 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Replace ECM. It is not necessary Monitor or OBD-II general <Ref. to to inspect DTC scan tool indicate DTC FU(DOHC P1134.
  • Page 295 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CD: DTC P1139 — FRONT OXYGEN (A/F) SENSOR #1 HEATER CIRCUIT RANGE/PERFORMANCE PROBLEM — S088521B97 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 296 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 2. Repair open cir- 1 Ω? FRONT OXYGEN (A/F) SENSOR CONNEC- cuit in harness TOR. between ECM 1) Start engine, and warm-up the engine.
  • Page 297 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CE: DTC P1141 — MASS AIR FLOW SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) — S088521B98 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 298 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does Subaru select moni- Inspect DTC Replace mass air tor or OBD-II general scan P0102 or P0103 flow and intake air tool indicate DTC P0102 or using “List of...
  • Page 299 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CF: DTC P1142 — THROTTLE POSITION SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) — S088521B99 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 300 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2194 Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace throttle Monitor or OBD-II general P0122 or P0123 position sensor. scan tool indicate DTC using “List of...
  • Page 301 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CG: DTC P1146 — PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) — S088521G07 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 302 Engine (Diagnostics) ¼ RHD MODEL S2M2191 Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. NOTE: Monitor or OBD-II general P0107, P0108 or In this case, it is not necessary to inspect scan tool indicate DTC P1112 using “List...
  • Page 303 “N” or “P” position. 3) Turn A/C switch to OFF. 4) Turn all accessory switches to OFF. 5) Read data of intake manifold pressure sen- sor signal using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 304 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-303...
  • Page 305 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CH: DTC P1244 — WASTEGATE CONTROL SOLENOID VALVE RANGE/PERFORMANCE PROBLEM (LOW INPUT) — S088521H86 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 306 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace waste- Monitor or OBD-II general P0245 or P0246 gate control sole- scan tool indicate DTC using “List of noid valve.
  • Page 307 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CI: DTC P1245 — WASTEGATE CONTROL SOLENOID VALVE MALFUNCTION (FAIL-SAFE) — S088521H87 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 308 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace waste- Monitor or OBD-II general P0244, P0245, gate control sole- scan tool indicate DTC P0246 or P1244 noid valve.
  • Page 309 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CJ: DTC P1301 — FIRE DUE TO INCREASED EXHAUST TEMPERATURE — S088521H88 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 310 Does failure for repair or Repair or replace Contact your Conduct troubleshooting for all DTC P0301, replacement exist? failure, then Subaru distributor. P0302, P0303 and P0304. <Ref. to EN(DOHC replace precata- NOTE: TURBO)-82, List of Diagnostic Trouble Code lytic converter.
  • Page 311 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CK: DTC P1312 — EXHAUST GAS TEMPERATURE CIRCUIT MALFUNCTION — S088521H89 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 312 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace exhaust Monitor or OBD-II general P0545, P0546 or gas temperature scan tool indicate DTC P1544 using “List sensor.
  • Page 313 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CL: DTC P1480 — COOLING FAN RELAY 1 CIRCUIT HIGH INPUT — S088521G08 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Radiator fan does not operate properly. ¼...
  • Page 314 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: S2M2199 EN(DOHC TURBO)-313...
  • Page 315 ECM and chassis ground. connector. NOTE: Radiator fan relay operation can be executed using Subaru Select Monitor. For procedure, refer to “Compulsory Valve Operation Check Mode”.<Ref. to EN(DOHC TURBO)-48, Com- pulsory Valve Operation Check Mode.> Connector & terminal (B137) No.
  • Page 316 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK SUB FAN RELAY. Is the resistance less than Go to step 7. Replace sub fan 1 Ω? 1) Connect battery to terminals No. 20 and relay and ECM. No.
  • Page 317 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CM: DTC P1507 — IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE) — S088521C16 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine keeps running at higher revolution than specified idling revolution. ¼...
  • Page 318 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0506, P0507, scan tool indicate DTC P0508, P0509 or P0506, P0507, P0508, P1142 using “List...
  • Page 319 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CN: DTC P1518 — STARTER SWITCH CIRCUIT LOW INPUT — S088521G09 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 320 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK OPERATION OF STARTER MOTOR. Does starter motor operate Repair harness Check starter NOTE: when ignition switch to and connector. motor circuit. Place the inhibitor switch in the “P” or “N” “ST”? NOTE: <Ref.
  • Page 321 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CO: DTC P1544 — HIGH EXHAUST TEMPERATURE DETECTED — S088521H90 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 322 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0335, P0336, scan tool indicate DTC P0340, P0341, P0335, P0336, P0340,...
  • Page 323 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CP: DTC P1560 — BACK-UP VOLTAGE CIRCUIT MALFUNCTION — S088521C27 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(DOHC TURBO)- 47, OPERATION, Clear Memory Mode.>...
  • Page 324 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ WIRING DIAGRAM: ¼ LHD MODEL S2M2182 EN(DOHC TURBO)-323...
  • Page 325 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) ¼ RHD MODEL S2M2183 EN(DOHC TURBO)-324...
  • Page 326 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK INPUT SIGNAL FOR ECM. Is the voltage more than 10 Repair poor con- Go to step 2. 1) Turn ignition switch to OFF. tact in ECM con- 2) Measure voltage between ECM and chas- nector.
  • Page 327 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CQ: DTC P1590 — NEUTRAL POSITION SWITCH CIRCUIT HIGH INPUT (AT MODEL) — S088521G83 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 328 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK DTC P0705 ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0705 using “List scan tool indicate DTC of Diagnostic P0705? Trouble Code (DTC)”.
  • Page 329 No. 7 — No. 12: CHECK SELECTOR CABLE CONNECTION. Is there any fault in selec- Repair selector Contact your tor cable connection to cable connection. Subaru distributor. inhibitor switch? <Ref. to CS-10, NOTE: Select Cable.> Inspection by DTM is required,...
  • Page 330 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) MEMO: EN(DOHC TURBO)-329...
  • Page 331 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CR: DTC P1591 — NEUTRAL POSITION SWITCH CIRCUIT LOW INPUT (AT MODEL) — S088521G84 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 332 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK DTC P0705 ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0705 using “List scan tool indicate DTC of Diagnostic P0705? Trouble Code (DTC)”.
  • Page 333 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CS: DTC P1594 — AUTOMATIC TRANSMISSION DIAGNOSIS INPUT SIGNAL CIRCUIT MALFUNCTION — S088521G12 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(SOHC)-47, OPERATION, Clear Memory Mode.>...
  • Page 334 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK ACCESSORY. Are car phone and/or CB Repair grounding Replace TCM. installed on vehicle? line of car phone <Ref. to AT-48, or CB system. Transmission Control Module (TCM).> EN(DOHC TURBO)-333...
  • Page 335 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CT: DTC P1595 — AUTOMATIC TRANSMISSION DIAGNOSIS INPUT SIGNAL CIRCUIT LOW INPUT — S088521G13 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(SOHC)-47, OPERATION, Clear Memory Mode.>...
  • Page 336 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage less than 1 Go to step 2. Even if MIL lights TCM CONNECTOR. up, the circuit has 1) Turn ignition switch to ON. returned to a nor- 2) Measure voltage between ECM and chas- mal condition at...
  • Page 337 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CU: DTC P1596 — AUTOMATIC TRANSMISSION DIAGNOSIS INPUT SIGNAL CIRCUIT HIGH INPUT — S088521G14 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(SOHC)-47, OPERATION, Clear Memory Mode.>...
  • Page 338 Even if MIL lights Contact your Measure voltage between ECM and chassis from 1 V to 4 V while moni- up, the circuit has Subaru distributor. ground. toring the value with volt- returned to a nor- NOTE: Connector & terminal...
  • Page 339 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CV: DTC P1701 — CRUISE CONTROL SET SIGNAL CIRCUIT MALFUNCTION FOR AUTOMATIC TRANSMISSION — S088521C29 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(SOHC)-47, OPERATION, Clear Memory Mode.>...
  • Page 340 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK HARNESS BETWEEN TCM AND Is the resistance less than Go to step 2. Repair open cir- 1 Ω? CCM CONNECTOR. cuit in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connectors from TCM and CCM connector.
  • Page 341 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CW: DTC P1711 — ENGINE TORQUE CONTROL SIGNAL 1 CIRCUIT MALFUNCTION — S088521G17 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Excessive shift shock CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 342 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK INPUT SIGNAL FOR ECM. Is the voltage more than Go to step 2. Go to step 4. 1) Turn ignition switch to ON. 4.5 V? 2) Measure voltage between ECM and chas- sis ground.
  • Page 343 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) CX: DTC P1712 — ENGINE TORQUE CONTROL SIGNAL 2 CIRCUIT MALFUNCTION — S088521G18 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Excessive shift shock CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 344 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (Diagnostics) Step Check CHECK INPUT SIGNAL FOR ECM. Is the voltage more than Go to step 2. Go to step 4. 1) Turn ignition switch to ON. 4.5 V? 2) Measure voltage between ECM and chas- sis ground.

  • Page 345: General Diagnostic Table

    GENERAL DIAGNOSTIC TABLE Engine (Diagnostics) 19. General Diagnostic Table S088257 A: INSPECTION S088257A10 1. ENGINE S088257A1001 NOTE: Malfunction of parts other than those listed is also possible. <Ref. to ME(DOHC TURBO)-91, Engine Trouble in General.> Symptom Problem parts 1) Idle air control solenoid valve 2) Pressure sensor 3) Mass air flow and intake temperature sensor 4) Ignition parts (*1)
  • Page 346 GENERAL DIAGNOSTIC TABLE Engine (Diagnostics) Symptom Problem parts 1) Pressure sensor 2) Mass air flow and intake temperature sensor 3) Engine coolant temperature sensor (*2) 4) Crankshaft position sensor (*3) 6. Surge 5) Camshaft position sensor (*3) 6) Fuel injection parts (*4) 7) Throttle position sensor 8) Fuel pump and fuel pump relay 1) Pressure sensor...
  • Page 347 GENERAL DIAGNOSTIC TABLE Engine (Diagnostics) MEMO: EN(DOHC TURBO)-346...

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