Subaru Legacy 2001 Service Manual
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Subaru Legacy 2001 Service Manual

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See also: Service Manual , Owner's Manual
2001 LEGACY SERVICE MANUAL
SUPPLEMENT FOR 6 CYLINDER
ENGINE MODEL
This service manual has been prepared to provide
SUBARU service personnel with the necessary infor-
mation and data for the correct maintenance and
repair of SUBARU vehicles.
This manual includes the procedures for maintenance,
disassembling, reassembling, inspection and adjust-
ment of components 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 genuine parts.
All information, illustration and specifications con-
tained in this manual are based on the latest product
information available at the time of publication
approval.
FUJI HEAVY INDUSTRIES LTD.
QUICK REFERENCE INDEX
G2281GE

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  • Page 1 SUPPLEMENT FOR 6 CYLINDER ENGINE MODEL This service manual has been prepared to provide SUBARU service personnel with the necessary infor- mation and data for the correct maintenance and repair of SUBARU vehicles. This manual includes the procedures for maintenance,...
  • Page 2 2001 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX SUPPLEMENT FOR 6 CYLINDER ENGINE MODEL G2281GE...

  • Page 3: Table Of Contents

    Engine Control Module (ECM) I/O Signal..........27 Engine Condition Data ................32 Transmission Control Module (TCM) I/O Signal ........33 Data Link Connector .................38 OBD-II General Scan Tool ................39 Subaru Select Monitor................41 Read Diagnostic Trouble Code ..............48 Inspection Mode ..................49 Clear Memory Mode..................52 Compulsory Valve Operation Check Mode..........53 Engine Malfunction Indicator Lamp (MIL) ..........55...

  • Page 4: Basic Diagnostic Procedure

    OBD-II general scan tool to data link connec- If DTC is not tor. shown on display 3) Turn ignition switch to ON and the Subaru although the MIL Select Monitor or OBD-II general scan tool illuminates, per- switch to ON.
  • Page 5 BASIC DIAGNOSTIC PROCEDURE Engine (DIAGNOSTICS) 2. AUTOMATIC TRANSMISSION S048501E4502 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 6: Check List For Interview

    CHECK LIST FOR INTERVIEW Engine (DIAGNOSTICS) 2. Check List for Interview Check the following items when problem has S048502 occurred. A: CHECK S048502A04 NOTE: 1. CHECK LIST NO. 1 Use copies of this page for interviewing customers. S048502A0401 Customer’s name Engine no.
  • Page 7 CHECK LIST FOR INTERVIEW Engine (DIAGNOSTICS) 2. CHECK LIST NO. 2 NOTE: S048502A0402 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 8: General Description

    GENERAL DESCRIPTION Engine (DIAGNOSTICS) 3. General Description 8) Use ECM mounting stud bolts at the body head S048001 grounding point when measuring voltage and A: CAUTION resistance inside the passenger compartment. S048001A03 1) Airbag system wiring harness is routed near the engine control module (ECM), main relay and fuel pump relay.

  • Page 9: General Description

    ¼ The OBD-II system is capable of communication for proper grounding. 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(H6)-7...
  • Page 10 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 11 GENERAL DESCRIPTION Engine (DIAGNOSTICS) MEMO: EN(H6)-9...

  • Page 12: Electrical Components Location

    S048507A130101 ¼ LHD model B2M4563A ¼ RHD model B2M4564A (1) Engine control module (ECM) (3) Test mode connector (2) Data link connector (for Subaru (4) CHECK ENGINE malfunction Select Monitor and OBD-II gen- indicator lamp (MIL) eral scan tool) EN(H6)-10...
  • Page 13 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) B3M1575A B2M2960E B2M2238D B2M3701A EN(H6)-11...
  • Page 14 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) ¼ SENSOR S048507A130102 B2M4583A (1) Intake air temperature sensor (4) Throttle position sensor (2) Intake manifold pressure sensor (5) Knock sensor (3) Engine coolant temperature sen- (6) Camshaft position sensor (7) Crankshaft position sensor EN(H6)-12...
  • Page 15 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) B2M4378A B2M4382A B2M4379A B2M4383A B2M4380A B2M4381A B2M4384A EN(H6)-13...
  • Page 16 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) B2M4385A (1) Front oxygen (A/F) sensor (LH) (3) Rear oxygen sensor (5) Front catalytic converter (RH) (2) Front oxygen (A/F) sensor (RH) (4) Front catalytic converter (LH) (6) Rear catalytic converter EN(H6)-14...
  • Page 17 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) B2M4389A B2M4386A B2M4387A B2M4390A B2M4388A EN(H6)-15...
  • Page 18 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) ¼ LHD model B2M4563B ¼ RHD model B2M4564B (1) Fuel level sensor (2) Fuel sub level sensor EN(H6)-16...
  • Page 19 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) B2M2966B B2M3706B EN(H6)-17...
  • Page 20 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) ¼ SOLENOID VALVE, EMISSION CONTROL SYSTEM PARTS AND IGNITION SYSTEM PARTS S048507A130103 B2M4583B (1) Induction control solenoid valve (3) Purge control solenoid valve (5) Induction control valve (2) Idle air control solenoid valve (4) EGR solenoid valve (6) Ignition coil &...
  • Page 21 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) B2M4391A B2M4394A B2M4392A B2M4395A B2M4393A B2M4396A EN(H6)-19...
  • Page 22 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) ¼ LHD model B2M4563C ¼ RHD model B2M4564C (1) Inhibitor switch (4) Fuel pump relay (7) Radiator main fan relay-2 (2) Fuel pump (5) Radiator main fan relay-1 (8) Radiator sub fan relay-2 (3) Main relay (6) Radiator sub fan relay-1 (9) Starter EN(H6)-20...
  • Page 23 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) B2M2246A B2M2966C B2M3709B B2M3710B B2M4397A B2M2247F EN(H6)-21...
  • Page 24 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) 2. TRANSMISSION S048507A1302 ¼ MODULE S048507A130201 ¼ LHD model B2M4563D ¼ RHD model B2M4564D (1) Transmission Control Module (2) AT diagnostic indicator light (TCM) EN(H6)-22...
  • Page 25 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) B3M1592F B2M3701B EN(H6)-23...
  • Page 26 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) ¼ SENSOR S048507A130202 H3M1842E B2M2260D B2M2261D OBD0653D (1) Rear vehicle speed sensor (2) Front vehicle speed sensor (3) Torque converter turbine speed sensor (4) ATF temperature sensor (5) Brake light switch EN(H6)-24...
  • Page 27 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) ¼ SOLENOID VALVE AND SWITCH S048507A130203 B3M1670C B2M2246B B2M2263A B2M2264A (1) Dropping resistor (2) Inhibitor switch (3) Shift solenoid valve 1 (4) Shift solenoid valve 2 (5) Line pressure duty solenoid (6) Lock-up duty solenoid (7) Transfer duty solenoid (8) 2-4 brake duty solenoid (9) Low clutch timing solenoid valve...
  • Page 28 ELECTRICAL COMPONENTS LOCATION Engine (DIAGNOSTICS) MEMO: EN(H6)-26...
  • Page 29 ENGINE CONTROL MODULE (ECM) I/O SIGNAL Engine (DIAGNOSTICS) 5. Engine Control Module (ECM) I/O Signal S048526 A: ELECTRICAL SPECIFICATION S048526A08 B2M4398A Signal (V) Con- Termi- Content nector Note Ignition SW ON nal No. Engine ON (Idling) (Engine OFF) Sensor output wave- form <Ref.

  • Page 30: Engine Control Module (Ecm) I/O Signal

    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) After warm-up the Engine Signal B135 — — engine. coolant tem- perature After warm-up the GND (sensor) B134 sensor...
  • Page 31 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) Torque control 2 signal B134 — Torque control cut signal B136 — EGR solenoid valve (A−) B137 10 —...
  • Page 32 ENGINE CONTROL MODULE (ECM) I/O SIGNAL Engine (DIAGNOSTICS) B: MEASUREMENT S048526A14 Measure input/output signal voltage. 1. WAVEFORM S048526A1401 B2M4559A EN(H6)-30...

  • Page 33: Engine Condition Data

    ENGINE CONDITION DATA Engine (DIAGNOSTICS) 6. Engine Condition Data S048530 A: ELECTRICAL SPECIFICATION S048530A08 Content Specified data 1.6 — 4.0 (%): Idling Engine load 6.4 — 12.8 (%): 2,500 rpm racing Measuring condition: ¼ After warm-up the engine. ¼ Gear position is in “N” or “P” position. ¼...
  • Page 34 TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL Engine (DIAGNOSTICS) 7. Transmission Control Module (TCM) I/O Signal S048506 A: ELECTRICAL SPECIFICATION S048506A08 S2M2131 Check with ignition switch ON. Con- Termi- Resistance to body Content nector Measuring conditions Voltage (V) nal No. (ohms) Back-up power supply Ignition switch OFF 10 —...

  • Page 35: Transmission Control Module (Tcm) I/O Signal

    TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL Engine (DIAGNOSTICS) Check with ignition switch ON. Con- Termi- Resistance to body Content nector Measuring conditions Voltage (V) nal No. (ohms) VDC communication sig- (+) — (–) — nal + Plus signal Ignition ON VDC communication sig- (+) —...
  • Page 36 TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL Engine (DIAGNOSTICS) Check with ignition switch ON. Con- Termi- Resistance to body Content nector Measuring conditions Voltage (V) nal No. (ohms) Ignition switch ON (with engine OFF) 1.5 — 4.0 Throttle fully closed after warm-up.
  • Page 37 TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL Engine (DIAGNOSTICS) Check with ignition switch ON. Con- Termi- Resistance to body Content nector Measuring conditions Voltage (V) nal No. (ohms) — — Data link signal (Subaru — Select Monitor) — — EN(H6)-35...
  • Page 38 TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL Engine (DIAGNOSTICS) MEMO: EN(H6)-36...

  • Page 39: Data Link Connector

    S048505A15 1) This connector is used both for OBD-II general scan tools and the Subaru Select Monitor. 2) Terminal No. 4 to No. 6 of the data link connector is used for the Subaru Select Monitor signal. 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 40: 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 S048527 diagnostic trouble code(s) and freeze frame data. A: OPERATION OBD-II general scan tool functions consist of: S048527A16 (1) MODE $01: Current powertrain diagnostic 1.
  • Page 41 OBD-II GENERAL SCAN TOOL Engine (DIAGNOSTICS) 3. MODE $02 (POWERTRAIN FREEZE FRAME DATA) S048527A1603 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 42: Subaru Select Monitor

    SUBARU SELECT MONITOR Engine (DIAGNOSTICS) 10. Subaru Select Monitor CAUTION: S048503 Do not connect scan tools except for Subaru A: OPERATION Select Monitor and OBD-II general scan tool. S048503A16 5) Turn ignition switch to ON (engine OFF) and 1. HOW TO USE SUBARU SELECT Subaru Select Monitor switch to ON.
  • Page 43 SUBARU SELECT MONITOR Engine (DIAGNOSTICS) 4. READ CURRENT DATA FOR ENGINE. (NORMAL MODE) S048503A1604 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 44 ON or OFF Radiator fan relay signal 3 Radiator Fan Relay #3 ON or OFF Induction control solenoid signal Variable Intake Air Sol. ON or OFF NOTE: For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. EN(H6)-42...
  • Page 45 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(H6)-43...
  • Page 46 Intake manifold absolute pressure signal Mani. Absolute Pressure Engine speed signal Engine Speed Vehicle speed signal Vehicle Speed km/h or MPH NOTE: For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. EN(H6)-44...
  • Page 47 A/C Mid Pressure Switch ON or OFF switch signal entered. Air conditioner lock switch signal A/C Lock Signal ON or OFF When air conditioner lock switch is entered. NOTE: For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. EN(H6)-45...
  • Page 48 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(H6)-46...

  • Page 49: Read Diagnostic Trouble Code

    3. OBD-II GENERAL SCAN TOOL S048508A1603 A: OPERATION S048508A16 Refers to data denoting emission-related power- train diagnostic trouble codes. 1. SUBARU SELECT MONITOR (NORMAL For details concerning diagnostic trouble codes, MODE) S048508A1601 refer to the List of Diagnostic Trouble Code (DTC). 1) On the...

  • Page 50: Inspection Mode

    INSPECTION MODE Engine (DIAGNOSTICS) 12. Inspection Mode 1) Prepare Subaru Select Monitor kit. <Ref. to S048510 EN(H6)-8 PREPARATION TOOL, General A: OPERATION Description.> S048510A16 1. PREPARATION FOR THE INSPECTION MODE S048510A1601 Raise the vehicle using a garage jack and place on safety stands or drive the vehicle onto free rollers.
  • Page 51 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 located in the lower portion of the MANUAL.
  • Page 52 INSPECTION MODE Engine (DIAGNOSTICS) NOTE: Ensure the selector lever is placed in the “P” posi- tion before starting. 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 53: 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: For detailed operation procedure, refer to the...
  • Page 54 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 S048528 connector located in the lower portion of the A: OPERATION S048528A16 instrument panel (on the driver’s side).

  • Page 55: Compulsory Valve Operation Check Mode

    ¼ The following parts will be displayed but not functional because they are not installed on the vehicle. Display AAI Solenoid Valve ASV Solenoid Valve FICD Solenoid Pressure Switching Sol. 1 Pressure Switching Sol. 2 PCV Solenoid Valve Vent Control Solenoid Valve ¼ For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. EN(H6)-53...
  • Page 56 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (DIAGNOSTICS) 15. Engine Malfunction Indicator Lamp (MIL) S048653 A: PROCEDURE S048653E45 1. Activation of check engine malfunction indicator lamp (MIL). <Ref. to EN(H6)-56 ACTIVATION OF CHECK ENGINE MAL- FUNCTION INDICATOR LAMP (MIL), Engine Malfunction Indicator Lamp (MIL).> ↓...

  • Page 57: Engine Malfunction Indicator Lamp (Mil)

    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) S048653E89 1) When ignition switch is turned to ON (engine...
  • Page 58 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (DIAGNOSTICS) C: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT COME ON. S048653E90 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 59 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 60 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. Measure voltage between combination meter NOTE: ¼...
  • Page 61 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (DIAGNOSTICS) MEMO: EN(H6)-59...
  • Page 62 ¼ DIAGNOSIS: 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. EN(H6)-60...
  • Page 63 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (DIAGNOSTICS) ¼ WIRING DIAGRAM: B2M4565 Step Check CHECK HARNESS BETWEEN COMBINA- Does the MIL come on? Repair short cir- Replace ECM. TION METER AND ECM CONNECTOR. cuit in harness <Ref. to FU(H6)- 1) Turn ignition switch to OFF. between combina- 46, Engine Con- 2) Disconnect connector from ECM.
  • Page 64 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (DIAGNOSTICS) E: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT BLINK AT A CYCLE OF 3 Hz. S048653E92 ¼ DIAGNOSIS: ¼ The CHECK ENGINE malfunction indicator lamp (MIL) circuit is open or shorted. ¼ Test mode connector circuit is open. ¼...
  • Page 65 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (DIAGNOSTICS) ¼ WIRING DIAGRAM: B2M4566 EN(H6)-63...
  • Page 66 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(H6)-56 2) Disconnect test mode connector.
  • Page 67 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (DIAGNOSTICS) MEMO: EN(H6)-65...
  • Page 68 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (DIAGNOSTICS) F: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) REMAINS BLINKING AT A CYCLE OF 3 Hz. S048653E93 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 69 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 70 ENGINE MALFUNCTION INDICATOR LAMP (MIL) Engine (DIAGNOSTICS) MEMO: EN(H6)-68...
  • Page 71 Engine Starting Failure.> ↓ 8. Inspection using Subaru Select Monitor or OBD-II general scan tool <Ref. to EN(H6)-97 Diagnostic Procedure with Diag- nostic Trouble Code (DTC).> or inspection using “19. General Diagnostics Table”. <Ref. to EN(H6)-321 General Diagnostic Table.>...

  • Page 72: Diagnostics For Engine Starting Failure

    DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) B: STARTER MOTOR CIRCUIT S048533E94 CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H6)-51 Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H6)-48 Inspection Mode.>. ¼ WIRING DIAGRAM: B2M4567 EN(H6)-70...
  • Page 73 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) Step Check CHECK BATTERY. Is the voltage more than 12 Go to step 2. Charge or replace battery. Is the voltage more than 10 Go to step 3. Go to step 4. CHECK INPUT SIGNAL FOR STARTER MOTOR.
  • Page 74 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) C: CONTROL MODULE POWER SUPPLY AND GROUND LINE S048533E37 CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H6)-51 Clear Memory Mode.> and INSPECTION MODE. <Ref. to EN(H6)-48 Inspection Mode.> ¼...
  • Page 75 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) Step Check CHECK GROUND CIRCUIT OF ECM. Is the resistance less than Go to step 3. Repair open cir- 5 Ω? 1) Disconnect connector from ECM. cuit in harness 2) Measure resistance of harness between between ECM ECM and chassis ground.
  • Page 76 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) Step Check CHECK INPUT VOLTAGE OF ECM. Is the voltage more than 10 Check ignition Repair open or 1) Connect main relay connector. control system. ground short cir- 2) Turn ignition switch to ON. <Ref.
  • Page 77 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) MEMO: EN(H6)-75...
  • Page 78 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) D: IGNITION CONTROL SYSTEM S048533E95 CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H6)-51 Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H6)-48 Inspection Mode.>. ¼ WIRING DIAGRAM: B2M4341 Step Check...
  • Page 79 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) Step Check CHECK POWER SUPPLY CIRCUIT FOR Is the voltage more than 10 Go to step 3. Repair harness IGNITION COIL & IGNITOR ASSEMBLY. and connector. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from ignition coil &...
  • Page 80 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) Step Check CHECK INPUT SIGNAL FOR IGNITION Is the voltage more than 10 Go to step 7. Replace ignition COIL & IGNITOR ASSEMBLY. coil & ignitor 1) Connect connector to ignition coil & ignitor assembly.
  • Page 81 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) MEMO: EN(H6)-79...
  • Page 82 CIRCUIT, Diag- NOTE: nostics for Engine Fuel pump operation can also be executed Starting Failure.> using Subaru Select Monitor (Function mode: FD01). For the procedure, refer to “Compulsory Valve Operation Check Mode”. <Ref. to EN(H6)-52 Compulsory Valve Operation Check Mode.>...
  • Page 83 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) Step Check CHECK GROUND CIRCUIT OF FUEL PUMP. Is the resistance less than Go to step 3. Repair harness 5 Ω? 1) Turn ignition switch to OFF. and connector. 2) Remove fuel pump access hole lid located NOTE: on the right rear of luggage compartment floor In this case,...
  • Page 84 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 8. Repair open cir- 1 Ω? FUEL PUMP RELAY CONNECTOR. cuit in harness 1) Disconnect connectors from ECM. between ECM 2) Measure resistance of harness between and fuel pump...
  • Page 85 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) MEMO: EN(H6)-83...
  • Page 86 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) F: FUEL INJECTOR CIRCUIT S048533E97 CAUTION: ¼ Check or repair only faulty parts. ¼ After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H6)-51 Clear Memory Mode.> and INSPECTION MODE. <Ref. to EN(H6)-48 Inspection Mode.> ¼...
  • Page 87 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 88 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance between 5 Go to step 8. Repair harness and 20 Ω? FUEL INJECTOR CONNECTOR. and connector. Measure resistance of harness between ECM NOTE: and fuel injector connector.
  • Page 89 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance between 5 Go to step 14. Repair harness and 20 Ω? FUEL INJECTOR CONNECTOR. and connector. Measure resistance of harness between ECM NOTE: and fuel injector connector.
  • Page 90 DIAGNOSTICS FOR ENGINE STARTING FAILURE Engine (DIAGNOSTICS) G: CRANKSHAFT POSITION SENSOR CIRCUIT S048533E98 CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H6)-51 Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H6)-48 Inspection Mode.>. NOTE: Check crankshaft position sensor circuit.
  • Page 91 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) 17. List of Diagnostic Trouble Code (DTC) S048525 A: LIST S048525A12 Item Index P0031 Bank #1 and sensor #1 oxygen (A/F) sensor <Ref. to EN(H6)-97 DTC P0031 — BANK #1 AND SENSOR (front RH) heater circuit low input #1 OXYGEN (A/F) SENSOR (FRONT RH) HEATER CIRCUIT LOW INPUT —, Diagnostic Procedure with Diagnostic Trouble...

  • Page 92: List Of Diagnostic Trouble Code (Dtc)

    LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Item Index P0121 Throttle position sensor circuit range/ <Ref. to EN(H6)-139 DTC P0121 — THROTTLE POSITION performance problem (high input) SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P0122 Throttle position sensor circuit low input <Ref.

  • Page 93: Diagnostic Procedure With Diagnostic Trouble Code (Dtc)

    LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Item Index P0302 Cylinder 2 misfire detected <Ref. to EN(H6)-176 DTC P0302 — CYLINDER 2 MISFIRE DETECTED —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P0303 Cylinder 3 misfire detected <Ref. to EN(H6)-176 DTC P0303 — CYLINDER 3 MISFIRE DETECTED —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 94 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Item Index P0463 Fuel level sensor circuit high input <Ref. to EN(H6)-219 DTC P0463 — FUEL LEVEL SENSOR CIRCUIT HIGH INPUT —, Diagnostic Procedure with Diag- nostic Trouble Code (DTC).> P0480 Cooling fan relay 1 circuit low input <Ref.
  • Page 95 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Item Index P0725 Engine speed input circuit malfunction <Ref. to EN(H6)-256 DTC P0725 — ENGINE SPEED INPUT CIRCUIT MALFUNCTION —, Diagnostic Procedure with Diag- nostic Trouble Code (DTC).> P0731 Gear 1 incorrect ratio <Ref.
  • Page 96 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Item Index P1134 Front oxygen (A/F) sensor micro-computer prob- <Ref. to EN(H6)-269 DTC P1134 — FRONT OXYGEN (A/F) SENSOR MICRO-COMPUTER PROBLEM —, Diagnostic Pro- cedure with Diagnostic Trouble Code (DTC).> P1135 Bank #2 and sensor #1 oxygen (A/F) sensor <Ref.
  • Page 97 LIST OF DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Item Index P1591 Neutral position switch circuit low input <Ref. to EN(H6)-299 DTC P1591 — NEUTRAL POSITION SWITCH CIRCUIT LOW INPUT —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P1594 Automatic transmission diagnosis input signal <Ref.

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