Subaru LEGACY Service Manual
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Subaru LEGACY Service Manual

Subaru LEGACY Service Manual

2004 year, engine section 1
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2004 LEGACY SERVICE MANUAL

ENGINE SECTION 1

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
FUEL INJECTION (FUEL SYSTEMS)
EMISSION CONTROL
(AUX. EMISSION CONTROL DEVICES)
INTAKE (INDUCTION)
MECHANICAL
EXHAUST
COOLING
FU(H4SO 2.0)
EC(H4SO 2.0)
IN(H4SO 2.0)
ME(H4SO 2.0)
EX(H4SO 2.0)
CO(H4SO 2.0)
LU(H4SO 2.0)
SP(H4SO 2.0)
IG(H4SO 2.0)
SC(H4SO 2.0)
EN(H4SO 2.0)
(diag)
FU(H4SO 2.5)
EC(H4SO 2.5)
IN(H4SO 2.5)
ME(H4SO 2.5)
EX(H4SO 2.5)
CO(H4SO 2.5)
G2320GE2

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  • Page 1: Engine Section

    2004 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX ENGINE SECTION 1 FUEL INJECTION (FUEL SYSTEMS) FU(H4SO 2.0) EMISSION CONTROL EC(H4SO 2.0) (AUX. EMISSION CONTROL DEVICES) INTAKE (INDUCTION) IN(H4SO 2.0) MECHANICAL ME(H4SO 2.0) This service manual has been prepared to provide SUBARU service personnel EXHAUST EX(H4SO 2.0)
  • Page 2 2003 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX ENGINE SECTION 1 LUBRICATION LU(H4SO 2.5) SPEED CONTROL SYSTEMS SP(H4SO 2.5) IGNITION IG(H4SO 2.5) STARTING/CHARGING SYSTEMS SC(H4SO 2.5) EN(H4SO 2.5) ENGINE (DIAGNOSTICS) (diag) G2320GE2...

  • Page 3: Table Of Contents

    Electrical Component Location ..............8 Engine Control Module (ECM) I/O Signal ..........17 Engine Condition Data ................21 Data Link Connector .................22 OBD-II General Scan Tool ................23 Subaru Select Monitor................26 Read Diagnostic Trouble Code (DTC) ............33 Inspection Mode..................34 Drive Cycle....................39 Clear Memory Mode..................41 Compulsory Valve Operation Check Mode ..........42...

  • Page 4: Basic Diagnostic Procedure

    Repair the related 1) Turn the ignition switch to OFF. aru Select Monitor? Repair the trouble parts. 2) Connect the Subaru Select Monitor to data cause. <Ref. to NOTE: link connector. EN(H4SO 3) Turn the ignition switch to ON, and the Sub- 2.5)(diag)-70, List...

  • Page 5: Check List For Interview

    Check List for Interview ENGINE (DIAGNOSTICS) 2. Check List for Interview 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 ECM mounting stud bolts as the grounding point to chassis when measuring voltage and resis- A: CAUTION tance inside the passenger compartment. 1) Airbag system wiring harness is routed near the ECM, main relay and fuel pump relay.
  • Page 8 Calling the self-diagnosis result is performed by the performing diagnostics. Subaru Select Monitor. 15) Diagnostics should be conducted by rotating with simple, easy operations and proceeding to complicated, difficult operations. The most impor- tant thing in diagnostics is to understand the cus- tomer’s complaint, and distinguish between the...
  • Page 9 TOOL NUMBER DESCRIPTION REMARKS 24082AA230 CARTRIDGE Troubleshooting for electrical system. ST24082AA230 22771AA030 SUBARU SELECT Troubleshooting for electrical system. MONITOR KIT • English: 22771AA030 (Without printer) • German: 22771AA070 (Without printer) • French: 22771AA080 (Without printer) • Spanish: 22771AA090 (Without printer) ST22771AA030...

  • Page 10: Electrical Component Location

    Electrical Component Location ENGINE (DIAGNOSTICS) 4. Electrical Component Location A: LOCATION 1. ENGINE • Control module • LHD model EN-02413 • RHD model EN-02451 Engine control module (ECM) Test mode connector Data link connector Malfunction indicator light EN(H4SO 2.5)(diag)-8...
  • Page 11 Electrical Component Location ENGINE (DIAGNOSTICS) EN-01966 EN-01147 EN-02414 AT-01877 EN(H4SO 2.5)(diag)-9...
  • Page 12 Electrical Component Location ENGINE (DIAGNOSTICS) • Sensor EN-02530 Mass air flow and intake air tem- Electronic throttle control Intake air temperature sensor (KA perature sensor (EC, EK and K4 and KS model) Knock sensor model) Camshaft position sensor Manifold absolute pressure sensor Crankshaft position sensor Engine coolant temperature sen- Tumble generator valve position...
  • Page 13 Electrical Component Location ENGINE (DIAGNOSTICS) EN-01970 EN-01971 EN-01972 EN-02179 EN-00010 EN-00011 EN-00012 EN-02531 EN(H4SO 2.5)(diag)-11...
  • Page 14 Electrical Component Location ENGINE (DIAGNOSTICS) EN-02547 EN-01973 Front oxygen (A/F) sensor Front catalytic converter Rear catalytic converter Rear oxygen sensor EN-02091 EN-02092 EN(H4SO 2.5)(diag)-12...
  • Page 15 Electrical Component Location ENGINE (DIAGNOSTICS) • Solenoid valve, actuator, emission control system parts and ignition system parts EN-02452 Purge control solenoid valve Tumble generator valve actuator Fuel injector EGR Valve (EC, EK and K4 Ignition coil & ignitor ASSY model) EN(H4SO 2.5)(diag)-13...
  • Page 16 Electrical Component Location ENGINE (DIAGNOSTICS) EN-01975 EN-01976 EN-01977 EN-01978 EN-02453 EN(H4SO 2.5)(diag)-14...
  • Page 17 Electrical Component Location ENGINE (DIAGNOSTICS) • LHD model (4) (3) (6) (9) EN-02423 • RHD model (8) (7) EN-01979 Inhibitor switch Fuel pump relay Radiator sub fan relay Fuel pump Electronic throttle control relay Radiator main fan relay 2 Main relay Radiator main fan relay 1 Starter EN(H4SO 2.5)(diag)-15...
  • Page 18 Electrical Component Location ENGINE (DIAGNOSTICS) EN-02093 EN-00178 EN-02094 EN-02095 EN-02096 EN(H4SO 2.5)(diag)-16...

  • Page 19: 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 11 12 13 14 15 16 17 11 12 13 14 15 16 17 18 19 18 19 20 21 22 23 26 27 20 21...
  • Page 20 Engine Control Module (ECM) I/O Signal ENGINE (DIAGNOSTICS) Signal (V) Termi- Connector DESCRIPTION NOTE Ignition SW ON Engine ON (engine OFF) (idling) Front oxygen Signal 1 B134 0 — 1.0 0 — 1.0 — (A/F) sensor Signal 2 B134 0 — 1.0 0 —...
  • Page 21 Engine Control Module (ECM) I/O Signal ENGINE (DIAGNOSTICS) Signal (V) Termi- Connector DESCRIPTION NOTE Ignition SW ON Engine ON (engine OFF) (idling) Fuel pump relay control ON: 0.5 or less B135 0.5 or less — (Model without immobilizer) OFF: 10 — 13 ON: 0.5 or less ON: 0.5 or less A/C relay control...
  • Page 22 Engine Control Module (ECM) I/O Signal ENGINE (DIAGNOSTICS) Signal (V) Termi- Connector DESCRIPTION NOTE Ignition SW ON Engine ON (engine OFF) (idling) GND (oxygen sensor heater B134 — GND (Electronic throttle B137 — control) ON: 0 ON: 0 Main switch B137 —...

  • Page 23: Engine Condition Data

    Engine Condition Data ENGINE (DIAGNOSTICS) 6. Engine Condition Data A: ELECTRICAL SPECIFICATION Remarks SPECIFICATION 1.6 — 2.9 (%): Idling Engine load 6.4 — 12.8 (%): 2,500 rpm Racing Measuring condition: • After engine is warmed-up. • Gear position is in “N” or “P” range. •...

  • Page 24: Data Link Connector

    This connector is used for Subaru Select Monitor. CAUTION: Do not connect any scan tools except for Subaru Select Monitor or OBD-II general scan tool, because the circuit for Subaru Select Monitor may be damaged. 9 10 11 12 13 EN-00037 Terminal No.

  • Page 25: Obd-Ii General Scan Tool

    OBD-II General Scan Tool ENGINE (DIAGNOSTICS) 8. OBD-II General Scan Tool OBD-II general scan tool functions consist of: (1) MODE $01: Current powertrain diagnostic A: OPERATION data (2) MODE $02: Powertrain freeze frame data 1. HOW TO USE OBD-II GENERAL SCAN (3) MODE $03: Emission-related powertrain TOOL 1) Prepare a general scan tool (OBD-II general...
  • Page 26 OBD-II General Scan Tool ENGINE (DIAGNOSTICS) 3. MODE $02 (POWERTRAIN FREEZE FRAME DATA) Refer to data denoting the operating condition when trouble is detected 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 27 OBD-II General Scan Tool ENGINE (DIAGNOSTICS) Test value & Test limit Unit sensor heater circuit (Bank 1 Sensor 2) <$81 or $02> Coolant thermostat (Coolant temperature below thermostat regulating tempera- °C ture) Evaporative emission control system vent control circuit range/performance 7.

  • Page 28: Subaru Select Monitor

    5) Turn ignition switch to ON (engine OFF) and turn Subaru Select Monitor switch to ON. A: OPERATION 1. HOW TO USE SUBARU SELECT MONI- 1) Prepare the Subaru Select Monitor kit. <Ref. to EN(H4SO 2.5)(diag)-7, PREPARATION TOOL, General Description.> EN-00040...
  • Page 29 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 30 Cancel switch signal Cancel Switch — OFF (At OFF) Integrated unit data reception Body Int. Unit Data — Integrated unit data update Body Int. Unit Count — NOTE: For detailed operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MANUAL”. EN(H4SO 2.5)(diag)-28...
  • Page 31 A/C system refrigerant no support Test of oxygen sensor Oxygen sensor complete Test of oxygen sensor heater O2 Heater Diagnosis complete Test of EGR system EGR system incomplete NOTE: For detailed operation procedure, refer to “SUBARU SELECT MONITOR OPERATION MANUAL”. EN(H4SO 2.5)(diag)-29...
  • Page 32 Ignition timing signal Ignition Timing Intake air volume Mass Air Flow g/sec °C Intake air temperature signal Intake Air Temp Throttle position signal Throttle Opening Angle NOTE: For detailed operation procedure, refer to SUBARU SELECT MONITOR OPERATION MANUAL. EN(H4SO 2.5)(diag)-30...
  • Page 33 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 34 Data reception signal Body Int. Unit Data ON or OFF entered. When counter update signal is Counter update signal Body Int. Unit Count ON or OFF entered. NOTE: For detailed operation procedure, refer to “SUBARU SELECT MONITOR OPERATION MANUAL”. EN(H4SO 2.5)(diag)-32...

  • Page 35: Read Diagnostic Trouble Code (Dtc)

    Read Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) 10.Read Diagnostic Trouble Code (DTC) A: OPERATION 1. SUBARU SELECT MONITOR (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 36: Inspection Mode

    Inspection Mode ENGINE (DIAGNOSTICS) 11.Inspection Mode A: PROCEDURE 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(H4SO 2.5)(diag)-39, Drive Cycle.> Item Condition P0031...
  • Page 37 Inspection Mode ENGINE (DIAGNOSTICS) Item Condition P0852 Neutral Switch Input Circuit High — P1086 Tumble Generated Valve Position Sensor 2 Circuit Low — P1087 Tumble Generated Valve Position Sensor 2 Circuit High — P1088 Tumble Generated Valve Position Sensor 1 Circuit Low —...
  • Page 38 2.5)(diag)-41, Clear Memory Mode.> 2) Idle the engine. gal, 4.4 — 8.8 Imp gal)]. 3) Prepare the Subaru Select Monitor kit. <Ref. to 2) Lift-up the vehicle using a garage jack and place EN(H4SO 2.5)(diag)-7, PREPARATION TOOL, it on rigid racks, or drive the vehicle onto free roll- General Description.>...
  • Page 39 Inspection Mode ENGINE (DIAGNOSTICS) 7) Connect the Subaru Select Monitor to data link • The speed difference between front and rear connector located in the lower portion of the instru- wheels may light the ABS warning light, but this in- ment panel (on the driver’s side).
  • Page 40 Inspection Mode ENGINE (DIAGNOSTICS) 9) Place the select lever or shift lever in “D” range (AT model) or “1st” gear (MT model) and drive the vehicle at 5 to 10 km/h (3 to 6 MPH). NOTE: • On AWD model, release the parking brake. •...

  • Page 41: Drive Cycle

    Drive Cycle ENGINE (DIAGNOSTICS) 12.Drive Cycle A: PROCEDURE 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 42 Drive Cycle ENGINE (DIAGNOSTICS) 4. DRIVE ACCORDING TO THE FOLLOWING DRIVE PATTERN (60) 64 (40) EN-00842 Idle engine for 10 seconds or Decelerate with throttle fully Stop vehicle with throttle fully more. closed to 64 km/h (40 MPH). closed. Accelerate to 97 km/h (60 MPH) Drive vehicle at 64 km/h (40 MPH) Vehicle speed km/h (MPH) within 20 seconds.

  • Page 43: Clear Memory Mode

    {Memory Clear} 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 Subaru Select Monitor switch to OFF. NOTE: • Initial diagnosis of electronic control throttle is performed after memory clearance.

  • Page 44: Compulsory Valve Operation Check Mode

    Compulsory Valve Operation Check Mode ENGINE (DIAGNOSTICS) 14.Compulsory Valve Operation 5) Connect the Subaru Select Monitor to data link connector located in the lower portion of instrument Check Mode panel (on the driver’s side). A: OPERATION 1) Prepare the Subaru Select Monitor kit. <Ref. to EN(H4SO 2.5)(diag)-7, PREPARATION TOOL,...
  • Page 45 Compulsory Valve Operation Check Mode ENGINE (DIAGNOSTICS) • A list of the support data is shown in the following table. DESCRIPTION Display Compulsory fuel pump relay oper- Fuel Pump ation check Compulsory radiator fan relay Radiator Fan Relay operation check Compulsory air conditioning relay A/C Compressor Relay operation check...

  • Page 46: Malfunction Indicator Light

    Malfunction Indicator Light ENGINE (DIAGNOSTICS) 15.Malfunction Indicator Light A: PROCEDURE 1. Activation of malfunction indicator light. <Ref. to EN(H4SO 2.5)(diag)-45, ACTIVATION OF MALFUNCTION INDICATOR LIGHT, Malfunction Indicator Light.> ↓ 2. Check that the malfunction indicator light does not come on. <Ref. to EN(H4SO 2.5)(diag)-46, MALFUNCTION INDICATOR LIGHT DOES NOT COME ON, Malfunction Indicator Light.>...

  • Page 47: Indicator Light

    Malfunction Indicator Light ENGINE (DIAGNOSTICS) B: ACTIVATION OF MALFUNCTION (3) Malfunction indicator light blinks at a cycle of 3 Hz after diagnosis if there is no trouble. Mal- INDICATOR LIGHT function indicator light illuminates if faulty. 1) When the ignition switch is turned to ON (engine OFF), the malfunction indicator light (A) in the com- bination meter illuminates.
  • Page 48 Malfunction Indicator Light ENGINE (DIAGNOSTICS) C: MALFUNCTION INDICATOR LIGHT DOES NOT COME ON DIAGNOSIS: The malfunction indicator light circuit is open or shorted. TROUBLE SYMPTOM: When the ignition switch is turned to ON (engine OFF), malfunction indicator light does not come on. WIRING DIAGRAM: •...
  • Page 49 Malfunction Indicator Light ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS model is the same as 2.0 L model.
  • Page 50 D: MALFUNCTION INDICATOR LIGHT DOES NOT GO OFF. DIAGNOSIS: The malfunction indicator light circuit is shorted. TROUBLE SYMPTOM: Although malfunction indicator light comes on when the engine runs, DTC is not shown on the Subaru Select Monitor display. WIRING DIAGRAM: • EC, EK and K4 model...
  • Page 51 Malfunction Indicator Light ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS model is the same as 2.0 L model.
  • Page 52 Malfunction Indicator Light ENGINE (DIAGNOSTICS) E: MALFUNCTION INDICATOR LIGHT DOES NOT BLINK. DIAGNOSIS: • The malfunction indicator light circuit is open or shorted. • Test mode connector circuit is in open. TROUBLE SYMPTOM: Malfunction indicator light does not blink during inspection mode. WIRING DIAGRAM: •...
  • Page 53 Malfunction Indicator Light ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS model is the same as 2.0 L model.
  • Page 54 Malfunction Indicator Light ENGINE (DIAGNOSTICS) F: MALFUNCTION INDICATOR LIGHT REMAINS BLINKING. DIAGNOSIS: Test mode connector circuit is shorted. TROUBLE SYMPTOM: Malfunction indicator light blinks when test mode connector is not connected. WIRING DIAGRAM: • EC, EK and K4 model IGNITION SWITCH BATTERY SBF-7...
  • Page 55 Malfunction Indicator Light ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS model is the same as 2.0 L model.

  • Page 56: Diagnostics For Engine Starting Failure

    Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) 16.Diagnostics for Engine Starting Failure A: PROCEDURE 1. Check for fuel amount. ↓ 2. Inspection of starter motor circuit. <Ref. to EN(H4SO 2.5)(diag)-55, STARTER MOTOR CIRCUIT, Diagnostics for Engine Start- ing Failure.> ↓ 3.
  • Page 57 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(H4SO 2.5)(diag)- 41, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-34, Inspection Mode.>. WIRING DIAGRAM: •...
  • Page 58 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) • KA and KS model NOTE: Fuel injection system for KA and KS model is the same as 2.0 L model. Refer to EN(H4SO 2.0) section. Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2.
  • Page 59 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK IGNITION SWITCH. Is the resistance less than 5 Go to step 9. Replace the igni- Ω? 1) Disconnect the connector from ignition tion switch. switch. 2) Measure the resistance between ignition switch terminals after turning the ignition switch to START position.
  • Page 60 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) C: CHECK POWER SUPPLY AND GROUND LINE OF ENGINE CONTROL MOD- ULE (ECM) CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-34, Inspection Mode.>. WIRING DIAGRAM: •...
  • Page 61 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS model is the same...
  • Page 62 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK INPUT VOLTAGE OF ECM. Is the voltage more than 10 V? Go to step 8. Repair the open or 1) Connect the connectors to ECM and main ground short cir- relay.
  • Page 63 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(H4SO 2.5)(diag)- 41, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-34, Inspection Mode.>. WIRING DIAGRAM: •...
  • Page 64 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS model is the same...
  • Page 65 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK INPUT SIGNAL FOR IGNITION COIL Does the voltage vary more Go to step 7. Replace the igni- & IGNITOR ASSY. than 10 V? tion coil & ignitor 1) Connect the connector to ignition coil & ASSY.
  • Page 66 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(H4SO 2.5)(diag)- 41, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-34, Inspection Mode.>. WIRING DIAGRAM: •...
  • Page 67 CIRCUIT, Diag- NOTE: nostics for Engine Fuel pump operation can also be executed us- Starting Failure.> ing Subaru Select Monitor. Refer to “Compulsory Valve Operation Check Mode” for procedures. <Ref. to EN(H4SO 2.5)(diag)-42, Compulsory Valve Operation Check Mode.> CHECK GROUND CIRCUIT OF FUEL PUMP.
  • Page 68 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK FUEL PUMP RELAY. Is the resistance less than 10 Go to step 8. Replace the fuel Ω? 1) Disconnect the connectors from fuel pump pump relay. <Ref. relay and main relay. to FU(H4SO 2.5)- 2) Remove the fuel pump relay and main relay 49, Fuel Pump.>...
  • Page 69 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(H4SO 2.5)(di- ag)-41, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-34, Inspection Mode.>.
  • Page 70 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS model is the same...
  • Page 71 Diagnostics for Engine Starting Failure ENGINE (DIAGNOSTICS) Step Check Is the resistance 5 — 20 Ω? CHECK EACH FUEL INJECTOR. Go to step 7. Replace the faulty 1) Turn the ignition switch to OFF. fuel injector. 2) Measure the resistance between each fuel injector terminals.

  • Page 72: List Of Diagnostic Trouble Code (Dtc)

    List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) 17.List of Diagnostic Trouble Code (DTC) A: LIST 1. EC, EK AND K4 MODEL Item NOTE P0030 HO2S Heater Control Circuit (Bank 1 <Ref. to EN(H4SO 2.5)(diag)-80, DTC P0030 HO2S HEATER CONTROL Sensor 1) CIRCUIT (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trou- ble Code (DTC).>...

  • Page 73: Diagnostic Procedure With Diagnostic Trouble Code (Dtc)

    List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item NOTE P0132 O2 Sensor Circuit High Voltage <Ref. to EN(H4SO 2.5)(diag)-123, DTC P0132 O2 SENSOR CIRCUIT HIGH (Bank 1 Sensor 1) VOLTAGE (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P0133 O2 Sensor Circuit Slow Response <Ref.
  • Page 74 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item NOTE P0459 Evaporative Emission Control Sys- <Ref. to EN(H4SO 2.5)(diag)-169, DTC P0459 EVAPORATIVE EMISSION tem Purge Control Valve Circuit High CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH, Diagnos- tic Procedure with Diagnostic Trouble Code (DTC).> P0462 Fuel Level Sensor Circuit Low Input <Ref.
  • Page 75 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item NOTE P1089 Tumble Generated Valve Position <Ref. to EN(H4SO 2.5)(diag)-200, DTC P1089 TUMBLE GENERATED Sensor 1 Circuit High VALVE POSITION SENSOR 1 CIRCUIT HIGH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P1090 Tumble Generated Valve System 1 <Ref.
  • Page 76 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item NOTE P1497 EGR Solenoid Valve Signal #3 Cir- <Ref. to EN(H4SO 2.5)(diag)-221, DTC P1497 EGR SOLENOID VALVE cuit Malfunction (High Input) SIGNAL #3 CIRCUIT MALFUNCTION (HIGH INPUT), Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P1498 EGR Solenoid Valve Signal #4 Cir- <Ref.
  • Page 77 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item NOTE P2138 Throttle/Pedal Position Sensor/ <Ref. to EN(H4SO 2.5)(diag)-257, DTC P2138 THROTTLE/PEDAL POSI- Switch “D”/“E” Voltage Rationality TION SENSOR/SWITCH “D” / “E” VOLTAGE RATIONALITY, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> 2.
  • Page 78 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item NOTE P0133 O2 Sensor Circuit Slow Response <Ref. to EN(H4SO 2.0)(diag)-114, DTC P0133 O2 SENSOR CIRCUIT (Bank 1 Sensor 1) SLOW RESPONSE (BANK 1 SENSOR 1), Diagnostic Procedure with Diag- nostic Trouble Code (DTC).> P0134 O2 Sensor Circuit No Activity <Ref.
  • Page 79 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item NOTE P0462 Fuel Level Sensor Circuit Low Input <Ref. to EN(H4SO 2.0)(diag)-159, DTC P0462 FUEL LEVEL SENSOR CIR- CUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P0463 Fuel Level Sensor Circuit High Input <Ref.
  • Page 80 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item NOTE P1493 EGR Solenoid Valve Signal #1 Cir- <Ref. to EN(H4SO 2.0)(diag)-181, DTC P1493 EGR SOLENOID VALVE cuit Malfunction (High Input) SIGNAL #1 CIRCUIT MALFUNCTION (HIGH INPUT), Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P1494 EGR Solenoid Valve Signal #2 Cir- <Ref.
  • Page 81 List of Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Item NOTE P2109 Throttle/Pedal Position Sensor A <Ref. to EN(H4SO 2.0)(diag)-205, DTC P2109 THROTTLE ANGLE Minimum Stop Performance CLOSED POSITION ERROR, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> P2111 Throttle Actuator Control System - <Ref.

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