Subaru 2004 Impreza Service Manual
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Subaru 2004 Impreza Service Manual

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2004 IMPREZA SERVICE MANUAL

ENGINE SECTION 2

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, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance 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 specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.
FUJI HEAVY INDUSTRIES LTD.
QUICK REFERENCE INDEX
FUEL INJECTION (FUEL SYSTEMS)
EMISSION CONTROL
(AUX. EMISSION CONTROL DEVICES)
INTAKE (INDUCTION)
MECHANICAL
EXHAUST
COOLING
LUBRICATION
SPEED CONTROL SYSTEMS
IGNITION
STARTING/CHARGING SYSTEMS
ENGINE (DIAGNOSTICS)
FU(H4DOTC)
EC(H4DOTC)
IN(H4DOTC)
ME(H4DOTC)
EX(H4DOTC)
CO(H4DOTC)
LU(H4DOTC)
SP(H4DOTC)
IG(H4DOTC)
SC(H4DOTC)
EN(H4DOTC)(diag)
G1870GE3

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Summary of Contents for Subaru 2004 Impreza

  • Page 1: Engine Section

    2004 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX ENGINE SECTION 2 FUEL INJECTION (FUEL SYSTEMS) FU(H4DOTC) EMISSION CONTROL EC(H4DOTC) (AUX. EMISSION CONTROL DEVICES) INTAKE (INDUCTION) IN(H4DOTC) MECHANICAL ME(H4DOTC) This service manual has been prepared to provide SUBARU service personnel EXHAUST EX(H4DOTC)

  • Page 2: Table Of Contents

    Engine Control Module (ECM) I/O Signal ..........23 Engine Condition Data ................27 Transmission Control Module (TCM) I/O Signal ........28 Data Link Connector .................29 OBD-II General Scan Tool ................30 Subaru Select Monitor................32 Read Diagnostic Trouble Code (DTC) ............38 Inspection Mode..................39 Drive Cycle....................45 Clear Memory Mode..................47 Compulsory Valve Operation Check Mode ..........48...

  • Page 3: Basic Diagnostic Procedure

    Select Monitor or OBD-II general scan tool g)-74, List of Diag- although malfunc- switch to ON. nostic Trouble tion indicator light 4)Read the DTC on Subaru Select Monitor or Code (DTC).> Go illuminates, per- OBD-II general scan tool. to step 4.
  • Page 4 Basic Diagnostic Procedure ENGINE (DIAGNOSTICS) 2. AUTOMATIC TRANSMISSION When DTC about automatic transmission is shown on display, carry out the following basic check. Af- ter that, carry out the replacement or repair work. 1) ATF level check <Ref. to 4AT-31, Automatic Transmission Fluid.>...

  • Page 5: Check List For Interview

    Check List for Interview ENGINE (DIAGNOSTICS) 2. Check List for Interview A: CHECK 1. CHECK LIST No. 1 Check the following items when problem has occurred. NOTE: Use copies of this page for interviewing customers. Customer’s name Engine No. Date of sale Fuel brand Date of repair Odometer reading...
  • Page 6 Check List for Interview ENGINE (DIAGNOSTICS) 2. CHECK LIST No. 2 Check the following items about the vehicle’s state when malfunction indicator light turns on. NOTE: Use copies of this page for interviewing customers. a) Other warning lights or indicators turn on. ❏ Yes / ❏ No ❏...

  • Page 7: General Description

    General Description ENGINE (DIAGNOSTICS) 3. General Description 8) Use the ECM mounting stud bolt at the body head grounding points when measuring voltage A: CAUTION and resistance inside the passenger compartment. 1) Airbag system wiring harness is routed near the ECM, main relay and fuel pump relay.

  • Page 8: Engine Section

    General Description ENGINE (DIAGNOSTICS) 12) Observe the following cautions when installing 2. ENGINE GROUNDING a radio in MFI equipped models. Make sure the engine grounding terminal is proper- CAUTION: ly connected to engine. • The antenna must be kept as far apart as pos- sible from the control unit.
  • Page 9 When trouble- of operation. In actual operation, the injection quan- shooting model with OBD-II, connect the Subaru tity is determined by the duration of an electric Select Monitor or the OBD-II general scan tool to pulse applied to the fuel injector and this permits the vehicle.

  • Page 10: Electrical Components Location

    Electrical Components Location ENGINE (DIAGNOSTICS) 4. Electrical Components Location A: LOCATION 1. ENGINE • Module EN-01269 EN-01270 Engine control module (ECM) Test mode connector Data link connector Malfunction indicator light EN(H4DOTC)(diag)-9...
  • Page 11 Electrical Components Location ENGINE (DIAGNOSTICS) EN-00156 EN-01271 EN-01272 EN-01150 EN(H4DOTC)(diag)-10...
  • Page 12 Electrical Components Location ENGINE (DIAGNOSTICS) • Sensor EN-01274 Manifold absolute pressure sensor Knock sensor Mass air flow and intake air tem- perature sensor Engine coolant temperature sen- Camshaft position sensor Crankshaft position sensor Tumble generator valve position sensor Throttle position sensor EN(H4DOTC)(diag)-11...
  • Page 13 Electrical Components Location ENGINE (DIAGNOSTICS) EN-00294 EN-00295 EN-00296 EN-00297 EN-00298 EN-00299 EN-00300 EN-00301 EN(H4DOTC)(diag)-12...
  • Page 14 Electrical Components Location ENGINE (DIAGNOSTICS) • Except for Australia model EN-00302 • For Australia model except for STi EN-01275 Front oxygen (A/F) sensor Front catalytic converter Rear catalytic converter Precatalytic converter (Except for Rear oxygen sensor (Except for Rear oxygen sensor (Australia Australia model and STi model) Australia model) model except for STi)
  • Page 15 Electrical Components Location ENGINE (DIAGNOSTICS) EN-00303 EN-00304 EN-00305 EN-00306 EN-00307 EN-01568 EN(H4DOTC)(diag)-14...
  • Page 16 Electrical Components Location ENGINE (DIAGNOSTICS) EN-01276 EN-01277 Fuel level sensor Fuel sub level sensor EN-00310 EN-00311 EN(H4DOTC)(diag)-15...
  • Page 17 Electrical Components Location ENGINE (DIAGNOSTICS) • Solenoid Valve, Actuator, Emission Control System Parts and Ignition System Parts EN-01278 Wastegate control solenoid valve Purge control solenoid valve Tumble generator valve actuator Idle air control solenoid valve Ignition coil EN(H4DOTC)(diag)-16...
  • Page 18 Electrical Components Location ENGINE (DIAGNOSTICS) EN-00313 EN-00314 EN-00315 EN-00316 EN-00317 EN(H4DOTC)(diag)-17...
  • Page 19 Electrical Components Location ENGINE (DIAGNOSTICS) (10) EN-01279 (10) EN-01280 Fuel pump Fuel pump control unit Radiator sub fan relay 2 Inhibitor switch Radiator main fan relay 1 (10) Starter Main relay Radiator main fan relay 2 Fuel pump relay Radiator sub fan relay 1 EN(H4DOTC)(diag)-18...
  • Page 20 Electrical Components Location ENGINE (DIAGNOSTICS) EN-00320 EN-00321 EN-01281 EN-01282 (10) EN-01596 EN-01328 EN(H4DOTC)(diag)-19...
  • Page 21 Electrical Components Location ENGINE (DIAGNOSTICS) 2. TRANSMISSION • Module EN-01284 Transmission control module AT diagnostic indicator light (for AT (TCM) (for AT model) model) EN-00327 EN-01285 EN(H4DOTC)(diag)-20...
  • Page 22 Electrical Components Location ENGINE (DIAGNOSTICS) • Sensor EN-00184 EN-00107 EN-00186 EN-00187 EN-00188 Rear vehicle speed sensor (for AT Front vehicle speed sensor (for AT ATF temperature sensor (for AT model) model) model) Brake light switch Front vehicle speed sensor (for Torque converter turbine speed MT model) sensor (for AT model)
  • Page 23 Electrical Components Location ENGINE (DIAGNOSTICS) • Solenoid Valve and Switch (AT model) EN-00329 EN-00330 EN-00331 Inhibitor switch Line pressure duty solenoid 2-4 brake duty solenoid Shift solenoid valve 1 Lock-up duty solenoid Low clutch timing solenoid valve Shift solenoid valve 2 Transfer duty solenoid 2-4 brake timing solenoid valve •...

  • Page 24: Engine Control Module (Ecm) I/O Signal

    Engine Control Module (ECM) I/O Signal ENGINE (DIAGNOSTICS) 5. Engine Control Module (ECM) I/O Signal A: ELECTRICAL SPECIFICATION B134 B135 B137 B136 EN-01286 Signal (V) Con- Termi- Content nector Note Ignition SW ON nal No. Engine ON (Idling) (Engine OFF) −7 —...
  • Page 25 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) ON: 1, or less ON: 1, or less Generator signal Waveform OFF: 10 — 13 OFF: 10 —...
  • Page 26 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) Oil flow ON: 10 — 13 ON: 13 — 14 Signal (+) B136 — control OFF: 0 OFF: 0 solenoid...
  • Page 27 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 1 signal B134 More than 4 More than 4 — Torque control 2 signal B134 More than 4 More than 4...

  • Page 28: Engine Condition Data

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

  • Page 29: Transmission Control Module (Tcm) I/O Signal

    Transmission Control Module (TCM) I/O Signal ENGINE (DIAGNOSTICS) 7. Transmission Control Module (TCM) I/O Signal A: ELECTRICAL SPECIFICATION <Ref. to 4AT(diag)-13, Transmission Control Module (TCM) I/O Signal.> EN(H4DOTC)(diag)-28...

  • Page 30: Data Link Connector

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

  • Page 31: 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 DTC and freeze frame data. A: OPERATION OBD-II general scan tool functions consist of: (1) MODE $01: Current powertrain diagnostic 1.
  • Page 32 OBD-II General Scan Tool ENGINE (DIAGNOSTICS) 3. MODE $02 (POWERTRAIN FREEZE FRAME DATA) 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 DTC that caused CARB required freeze frame data storage...

  • Page 33: Subaru Select Monitor

    Select Monitor and OBD-II general scan tool. 5) Turn the ignition switch to ON (engine OFF) and 1. HOW TO USE SUBARU SELECT MONI- Subaru Select Monitor switch to ON. 1) Prepare the Subaru Select Monitor kit. <Ref. to EN(H4DOTC)(diag)-8, PREPARATION TOOL, General Description.>...
  • Page 34 Subaru Select Monitor ENGINE (DIAGNOSTICS) 4. READ CURRENT DATA FOR ENGINE. (NORMAL MODE) 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} and press the [YES] key.
  • Page 35 — Intercooler water spray auto switch signal IC Washer Switch — OFF (At OFF) Intercooler water spray relay signal IC Washer Relay — OFF (At OFF) NOTE: For detailed operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MANUAL”. EN(H4DOTC)(diag)-34...
  • Page 36 NOTE: For detailed operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MANUAL”. 6. READ FREEZE FRAME DATA FOR ENGINE. (OBD MODE) 1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
  • Page 37 Subaru Select Monitor ENGINE (DIAGNOSTICS) 7. LED OPERATION MODE FOR ENGINE 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} and press the [YES] key.
  • Page 38 Subaru Select Monitor ENGINE (DIAGNOSTICS) NOTE: For detailed operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MANUAL”. 8. READ CURRENT DATA FOR AT 1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.

  • Page 39: Read Diagnostic Trouble Code (Dtc)

    For details concerning DTC, refer to the List of Di- agnostic Trouble Code (DTC). <Ref. 1. SUBARU SELECT MONITOR (NORMAL EN(H4DOTC)(diag)-74, List of Diagnostic Trouble MODE) Code (DTC).> 1) On the «Main Menu» display screen, select the NOTE: {Each System Check} and press the [YES] key.

  • Page 40: Inspection Mode

    Inspection Mode ENGINE (DIAGNOSTICS) 12.Inspection Mode A: OPERATION Carry out trouble diagnosis shown in the following DTC table. When performing trouble diagnosis which is not shown in the DTC table, refer to the next item Drive cycle. <Ref. to EN(H4DOTC)(diag)-45, Drive Cycle.> Item Condition P0011...
  • Page 41 Inspection Mode ENGINE (DIAGNOSTICS) Item Condition P0508 Idle Control System Circuit Low — P0509 Idle Control System Circuit High — P0512 Starter Request Circuit — P0513 Incorrect Immobilizer Key — P0519 Idle Control System Malfunction (Fail-Safe) — P0558 Generator Circuit Low Input —...
  • Page 42 Inspection Mode ENGINE (DIAGNOSTICS) Item Condition P1153 O2 Sensor Circuit Range/Performance (High) (Bank1 Sensor1) — P1306 OCV Solenoid Valve Signal 1 Circuit Malfunction (Open) — P1307 OCV Solenoid Valve Signal 1 Circuit Malfunction (Short) — P1308 OCV Solenoid Valve Signal 2 Circuit Malfunction (Open) —...
  • Page 43 Clear Memory Mode.> 2) Warm up the engine. Imp gal)] and the battery voltage is 12 V or more. 2) Raise the vehicle using a garage jack and place 3) Prepare the Subaru Select Monitor kit. <Ref. to EN(H4DOTC)(diag)-8, PREPARATION TOOL, on safety stands or drive the vehicle onto free roll- General Description.>...
  • Page 44 Inspection Mode ENGINE (DIAGNOSTICS) 7) Connect the Subaru Select Monitor to data link NOTE: connector. • For detailed operation procedure, refer to the (1) Connect the Subaru Select Monitor to data SUBARU SELECT MONITOR OPERATION MAN- link connector located in the lower portion of the UAL.
  • Page 45 Inspection Mode ENGINE (DIAGNOSTICS) 5) Start the engine. NOTE: • Ensure the select lever is placed in “P” range be- fore starting. (AT model) • Depress the clutch pedal when starting engine. (MT model) 6) Using the select lever or shift lever, turn the “P” position switch and “N”...

  • Page 46: Drive Cycle

    Drive Cycle ENGINE (DIAGNOSTICS) 13.Drive Cycle A: OPERATION There are three drive patterns for the trouble diagnosis. Driving in the specified pattern allows to diagnose malfunctioning items listed below. After the malfunctioning items listed below are repaired, always check whether they correctly resume their functions by driving in the required drive pattern. 1.
  • Page 47 Drive Cycle ENGINE (DIAGNOSTICS) 3. IDLE FOR 10 MINUTES NOTE: Before the diagnosis, drive the vehicle at 10 km/h (6 MPH) or more. Item Condition *P0483 Cooling Fan Rationality Check — *P0506 Idle Control System RPM Lower Than Expected — *P0507 Idle Control System RPM Higher Than Expected —...

  • 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 ignition switch to OFF, and then turn the Subaru Select Monitor to OFF. NOTE: For detailed operation procedure, refer to the SUB- ARU SELECT MONITOR OPERATION MANUAL.

  • Page 49: Compulsory Valve Operation Check Mode

    (1) Connect the Subaru Select Monitor to data link connector located in the lower portion of in- Check Mode strument panel (on the driver’s side). A: OPERATION 1) Prepare the Subaru Select Monitor kit. <Ref. to EN(H4DOTC)(diag)-8, PREPARATION TOOL, General Description.>...
  • 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 • For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MAN- UAL. EN(H4DOTC)(diag)-49...

  • Page 51: Malfunction Indicator Light

    Malfunction Indicator Light ENGINE (DIAGNOSTICS) 16.Malfunction Indicator Light A: PROCEDURE 1. Activation of check malfunction indicator light. <Ref. to EN(H4DOTC)(diag)-51, ACTIVATION OF MALFUNCTION INDICA- TOR LIGHT, Malfunction Indicator Light.> ↓ 2. Check that the malfunction indicator light does not come on. <Ref. to EN(H4DOTC)(diag)-52, MALFUNCTION INDICATOR LIGHT DOES NOT COME ON., Malfunction Indicator Light.>...

  • Page 52: Indicator Light

    Malfunction Indicator Light ENGINE (DIAGNOSTICS) B: ACTIVATION OF MALFUNCTION 3) If the diagnosis system senses a misfire which could damage the catalyzer, the malfunction indi- INDICATOR LIGHT cator light will blink at a cycle of 1 Hz. 1) When the ignition switch is turned to ON (engine off), the malfunction indicator light in the combina- tion meter illuminates.

  • Page 53: Wiring Diagram

    Malfunction Indicator Light ENGINE (DIAGNOSTICS) C: MALFUNCTION INDICATOR LIGHT DOES NOT COME ON. • DIAGNOSIS: • The malfunction indicator light circuit is shorted. • TROUBLE SYMPTOM: • When the ignition switch is turned to ON (engine OFF), malfunction indicator light does not come on. •...
  • Page 54 Malfunction Indicator Light ENGINE (DIAGNOSTICS) Step Check CHECK ECM CONNECTOR. Is the ECM connector correctly Replace the ECM. Repair the con- connected? <Ref. to nection of ECM FU(H4DOTC)-49, connector. Engine Control Module (ECM).> CHECK HARNESS BETWEEN COMBINA- Is the resistance less than 1 Go to step 5.
  • Page 55 • The malfunction indicator light circuit is shorted. • TROUBLE SYMPTOM: • Although malfunction indicator light comes on when engine runs, but DTC is not shown on Subaru Se- lect Monitor or OBD-II general scan tool display. • WIRING DIAGRAM:...
  • Page 56 Malfunction Indicator Light ENGINE (DIAGNOSTICS) E: MALFUNCTION INDICATOR LIGHT DOES NOT BLINK AT A CYCLE OF 3 HZ. • DIAGNOSIS: • The malfunction indicator light circuit is open or shorted. • Test mode connector circuit is open. • TROUBLE SYMPTOM: •...
  • Page 57 Malfunction Indicator Light ENGINE (DIAGNOSTICS) Step Check CHECK STATUS OF MALFUNCTION INDI- Does the malfunction indicator Go to step 2. Repair the mal- CATOR LIGHT. light come on? function indicator 1)Turn the ignition switch to OFF. light circuit. <Ref. 2)Disconnect the test mode connector. 3)Turn the ignition switch to ON.
  • Page 58 Malfunction Indicator Light ENGINE (DIAGNOSTICS) F: MALFUNCTION INDICATOR LIGHT REMAINS BLINKING AT A CYCLE OF 3 • DIAGNOSIS: • Test mode connector circuit is shorted. • TROUBLE SYMPTOM: • Malfunction indicator light blinks at a cycle of 3 Hz when ignition switch is turned to ON. •...
  • Page 59 Malfunction Indicator Light ENGINE (DIAGNOSTICS) Step Check CHECK TEST MODE CONNECTOR. Does the malfunction indicator Go to step 2. System is in good 1)Disconnect the test mode connector. light blink? order. 2)Turn the ignition switch to ON. NOTE: Malfunction indica- tor light blinks at a cycle of 3 Hz when test mode connec-...

  • Page 60: Diagnostics For Engine Starting Failure

    Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) 17.Diagnostics for Engine Starting Failure A: PROCEDURE 1. Inspection of starter motor circuit. <Ref. to EN(H4DOTC)(diag)-60, STARTER MOTOR CIRCUIT, Diagnostics for Engine Starting Failure.> ↓ 2. Inspection of ECM power supply and ground line. <Ref. to EN(H4DOTC)(diag)-62, CONTROL MODULE POWER SUPPLY AND GROUND LINE, Diagnostics for Engine Starting Failure.>...
  • Page 61 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) B: STARTER MOTOR CIRCUIT CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H4DOTC)(di- ag)-47, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H4DOTC)(diag)-39, Inspection Mode.>. • WIRING DIAGRAM: BATTERY SBF-4 SBF-1...
  • Page 62 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK OPERATION OF STARTER MOTOR. Does the starter motor oper- Go to step 2. Go to step 3. ate? CHECK DTC. Is the DTC displayed? <Ref. to Using the List of Go to step 3.
  • Page 63 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) C: CONTROL MODULE POWER SUPPLY AND GROUND LINE CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H4DOTC)(di- ag)-47, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H4DOTC)(diag)-39, Inspection Mode.>.
  • Page 64 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) • RHD model MAIN RELAY DATA LINK CONNECTOR SBF-5 IGNITION BATTERY SWITCH No.11 SBF-4 SBF-1 B134 B136 B137 B134 B137 1 2 3 4 1 2 3 4 5 6 7 8 10 11 12 14 15 10 11 12 13 14 15 16 17...
  • Page 65 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK GROUND CIRCUIT OF ECM. Is the resistance less than 5 Go to step 3. Repair the open Ω? 1)Disconnect the connector from ECM. circuit in harness 2)Measure the resistance of harness between between ECM ECM and chassis ground.
  • Page 66 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK INPUT VOLTAGE OF ECM. Is the voltage more than 10 V? Check the ignition Repair the open or 1)Connect the main relay connector. control system. ground short cir- 2)Turn the ignition switch to ON. <Ref.
  • Page 67 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) D: IGNITION CONTROL SYSTEM CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H4DOTC)(di- ag)-47, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H4DOTC)(diag)-39, Inspection Mode.>. • WIRING DIAGRAM: •...
  • Page 68 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) • RHD model B137 No.11 SBF-1 SBF-4 IGNITION SWITCH IGNITION COIL IGNITION COIL IGNITION COIL IGNITION COIL No.1 No.2 No.3 No.4 B137 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 9 10 11 12 17 18...
  • Page 69 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK POWER SUPPLY CIRCUIT FOR IG- Is the voltage more than 10 V? Go to step 4. Repair the har- NITION COIL & IGNITOR ASSEMBLY. ness and connec- 1)Turn the ignition switch to OFF. tor.
  • Page 70 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) E: FUEL PUMP CIRCUIT CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H4DOTC)(di- ag)-47, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H4DOTC)(diag)-39, Inspection Mode.>. • WIRING DIAGRAM: BATTERY SBF-5 FUEL PUMP...
  • Page 71 INJECTOR CIR- nostic Trouble Fuel pump operation check can also be execut- CUIT, Diagnostics Code (DTC).> ed using the Subaru Select Monitor. for Engine Start- For the procedure, refer to “Compulsory Valve ing Failure.> Operation Check Mode”. <Ref. to EN(H4DOTC)(diag)-48, Compulsory Valve Operation Check Mode.>...
  • Page 72 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) F: FUEL INJECTOR CIRCUIT CAUTION: • Check or repair only faulty parts. • After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H4DOTC)(diag)-47, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H4DOTC)(diag)-39, Inspection Mode.>.
  • Page 73 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) • RHD model MAIN RELAY BATTERY SBF-5 B137 FUEL INJECTORS B137 1 2 3 4 10 11 12 13 14 15 16 17 19 20 21 5 6 7 8 10 11 12 13 14 15 16 9 10 11 12 17 18...
  • Page 74 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK POWER SUPPLY TO EACH FUEL Is the voltage more than 10 V? Go to step 3. Repair the har- INJECTOR. ness and connec- 1)Turn the ignition switch to OFF. tor. 2)Disconnect the connector from fuel injector.

  • Page 75: List Of Diagnostic Trouble Code (Dtc)

    List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) 18.List of Diagnostic Trouble Code (DTC) A: LIST Item Index P0011 “A” Camshaft Position - Timing Over- <Ref. to EN(H4DOTC)(diag)-81, DTC P0011 “A” CAMSHAFT POSITION- Advanced or System Performance TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 1), (Bank 1) Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...

  • Page 76: Diagnostic Procedure With Diagnostic Trouble Code (Dtc)

    List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item Index P0122 Throttle/Pedal Position Sensor/ <Ref. to EN(H4DOTC)(diag)-123, DTC P0122 THROTTLE/PEDAL POSI- Switch “A” Circuit Low Input TION SENSOR/SWITCH “A” CIRCUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P0123 Throttle/Pedal Position Sensor/ <Ref.
  • Page 77 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item Index P0328 Knock Sensor 1 Circuit High Input <Ref. to EN(H4DOTC)(diag)-165, DTC P0328 KNOCK SENSOR 1 CIRCUIT (Bank 1 or Single Sensor) HIGH INPUT (BANK 1 OR SINGLE SENSOR), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 78 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item Index P0509 Idle Control System Circuit High <Ref. to EN(H4DOTC)(diag)-210, DTC P0509 IDLE CONTROL SYSTEM CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P0512 Starter Request Circuit <Ref. to EN(H4DOTC)(diag)-212, DTC P0512 STARTER REQUEST CIR- CUIT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 79 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item Index P0748 Pressure Control Solenoid “A” Elec- <Ref. to 4AT(diag)-75, DTC 75 LINE PRESSURE DUTY SOLENOID, Diag- trical nostic Procedure with Diagnostic Trouble Code (DTC).> P0753 Shift Solenoid “A” Electrical <Ref. to 4AT(diag)-63, DTC 71 SHIFT SOLENOID 1, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 80 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item Index P1095 Tumble Generated Valve Signal 1 <Ref. to EN(H4DOTC)(diag)-274, DTC P1095 TUMBLE GENERATED Circuit Malfunction (Short) VALVE SIGNAL 1 CIRCUIT MALFUNCTION (SHORT), Diagnostic Proce- dure with Diagnostic Trouble Code (DTC).> P1096 Tumble Generated Valve Signal 2 <Ref.
  • Page 81 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item Index P1574 Key Communication Failure <Ref. to IM(diag)-23, DTC P1574 KEY COMMUNICATION FAILURE, Diag- nostics Chart with Diagnostic Trouble Code (DTC).> P1576 EGI Control Module EEPROM <Ref. to IM(diag)-23, DTC P1576 EGI CONTROL MODULE EEPROM, Diag- nostics Chart with Diagnostic Trouble Code (DTC).>...

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