Subaru Legacy Service Manual
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Subaru Legacy Service Manual

Subaru Legacy Service Manual

2004
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See also: Owner's Manual , Instruction Manual
2004 LEGACY SERVICE MANUAL
CHASSIS 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, 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
FRONT SUSPENSION
REAR SUSPENSION
WHEEL AND TIRE SYSTEM
DIFFERENTIALS
TRANSFER CASE
DRIVE SHAFT SYSTEM
ABS
ABS (DIAGNOSTICS)
VEHICLE DYNAMICS CONTROL (VDC)
VEHICLE DYNAMICS CONTROL (VDC)
(DIAGNOSTICS)
BRAKE
PARKING BRAKE
POWER ASSISTED SYSTEM
(POWER STEERING)
FS
RS
WT
DI
TC
DS
ABS
ABS(diag)
VDC
VDC(diag)
BR
PB
PS
G2320GE6

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  • Page 1 2004 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX CHASSIS SECTION FRONT SUSPENSION REAR SUSPENSION WHEEL AND TIRE SYSTEM DIFFERENTIALS This service manual has been prepared to provide SUBARU service personnel TRANSFER CASE with the necessary information and data for the correct maintenance and repair of SUBARU vehicles.

  • Page 2: Table Of Contents

    Check List for Interview................4 General Description ..................8 Electrical Component Location ..............10 Control Module I/O Signal .................12 Subaru Select Monitor................15 Read Diagnostic Trouble Code (DTC) ............25 Inspection Mode..................26 Clear Memory Mode..................27 ABS Warning Light / Brake Warning Light Illumination Pattern ....28 List of Diagnostic Trouble Code (DTC) .............39...

  • Page 3: Basic Diagnostic Procedure

    Go to step 3. 1) Turn the ignition switch to OFF. 2) Connect the Subaru Select Monitor to data link connector. 3) Turn the ignition switch to ON and Subaru Select Monitor to ON. NOTE: If the communication function of the Subaru Se- lect Monitor cannot be executed normally, check the communication circuit.
  • Page 4 Diagnostic Trouble Code (DTC).> 2) Fix the wrong part. 3) Perform clear memory mode. <Ref. to ABS(diag)-17, CLEAR MEMORY MODE, OPERATION, Subaru Select Monitor.> 4) Perform the inspection mode. <Ref. to ABS(diag)-26, Inspection Mode.> 5) Read the DTC. <Ref. to ABS(diag)-15, READ DIAGNOSTIC TROUBLE CODE (DTC), OPERATION, Subaru Select Monitor.>...

  • Page 5: Check List For Interview

    Check List for Interview ABS (DIAGNOSTICS) 2. Check List for Interview A: CHECK Check the following items about the vehicle’s state. 1. STATE OF ABS WARNING LIGHT ❏ Always ABS warning light ❏ Sometimes comes on. ❏ Only once ❏ Not come on •...
  • Page 6 Check List for Interview ABS (DIAGNOSTICS) ❏ Immediately after turning the ignition to ON Timing ❏ Immediately after turning the ignition to START ❏ When accelerating — km/h — ❏ When driving at a constant speed km/h ❏ When decelerating —...
  • Page 7 Check List for Interview ABS (DIAGNOSTICS) Behavior of vehicle a) Directional stability cannot be obtained or the steering refuses to work when applying brakes: ❏ Yes / ❏ No • When: ❏ When turning to the right ❏ When turning to the left ❏...
  • Page 8 Check List for Interview ABS (DIAGNOSTICS) Condition a) Brakes Deceleration: ❏ Intermittent / ❏ Temporary b) Accelerator Acceleration: ❏ Intermittent / ❏ Temporary c) Vehicle speed km/h ❏ Advancing ❏ When accelerating ❏ When decelerating ❏ At low speed ❏ When turning ❏...

  • Page 9: General Description

    General Description ABS (DIAGNOSTICS) 3. General Description 6. TIRE Check the tire specifications, tire wear and air pres- A: CAUTION sure. <Ref. to WT-2, SPECIFICATION, General 1. SUPPLEMENTAL RESTRAINT SYSTEM Description.> “AIRBAG” Airbag system wiring harness is routed near the ABS wheel speed sensor and ABSCM&H/U.

  • Page 10: Special Tool

    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 2.

  • Page 11: Electrical Component Location

    (10) (11) (12) ABS00458 ABS control module and hydraulic Data link connector Caliper body control unit (ABSCM&H/U) (For Subaru Select Monitor) (10) G sensor Two-way connector Transmission control module (11) Stop light switch (TCM) (AT model) Diagnosis connector (Used for...
  • Page 12 Electrical Component Location ABS (DIAGNOSTICS) ABS00405 ABS00106 (13) ABS00438 ABS00464 REAR FRONT ABS00408 ABS00407 (10) ABS00406 ABS(diag)-11...

  • Page 13: Control Module I/O Signal

    Control Module I/O Signal ABS (DIAGNOSTICS) 5. Control Module I/O Signal A: ELECTRICAL SPECIFICATION B301 7 8 9 10 11 16 17 18 22 23 24 25 26 ABS00409 ABS control module and hydraulic control unit (ABSCM&H/U) con- nector NOTE: •...
  • Page 14 8 — 15 1.5 seconds and less than 1.5 V after 1.5 seconds passed. Less than 1.5 V when no data is received. Subaru Select Monitor 7 — 15 0 ←→ 12 V pulse (in communication) ABS diagnosis connector 25 — 15 When the ignition switch is ON, 10 —...
  • Page 15 Control Module I/O Signal ABS (DIAGNOSTICS) B: WIRING DIAGRAM (16) (30) (31) (17) (18) (19) (20) (28) (29) (21) (22) (23) (10) (11) (12) (24) (13) (25) (14) (26) (15) (27) ABS00470 Battery (12) Rear inlet solenoid valve LH (24) Front ABS wheel speed sensor LH Ignition switch (13)

  • Page 16: Subaru Select Monitor

    5) Turn the ignition switch to ON (engine OFF) and 1. READ DIAGNOSTIC TROUBLE CODE turn the Subaru Select Monitor switch to ON. (DTC) 1) Prepare the Subaru Select Monitor kit. <Ref. to ABS(diag)-9, SPECIAL TOOL, PREPARATION TOOL, General Description.> ABS00114 (1) Power switch 6) On the «Main Menu»...
  • Page 17 Voltage supplied to ABSCM&H/U is displayed. ABS Control Flag ABS control condition is displayed. ON or OFF ABS OK B Signal ABS system normal/abnormal is displayed. OK or NG NOTE: For details concerning operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MAN- UAL”. ABS(diag)-16...
  • Page 18 Whether abnormal voltage occurred or Failure not is displayed during malfunction. 5) When “Done” and “Turn ignition switch OFF” are shown on the display screen, turn the Subaru Se- lect Monitor and ignition switch to OFF. NOTE: For details concerning operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION...
  • Page 19 Subaru Select Monitor ABS (DIAGNOSTICS) B: INSPECTION 1. COMMUNICATION FOR INITIALIZING IMPOSSIBLE DETECTING CONDITION: Defective harness connector TROUBLE SYMPTOM: Communication is impossible between ABS and Subaru Select Monitor. WIRING DIAGRAM: BATTERY IGNITION SWITCH DATA LINK CONNECTOR B301 ABSCM & H/U...
  • Page 20 MUNICATION. year displayed on Subaru 1) Turn the ignition switch to ON. Select Monitor? 2) Using Subaru Select Monitor, check whether communication to other system can be executed normally. CHECK SUBARU SELECT MONITOR COM- Is the system name and model Replace Go to step 6.
  • Page 21 Subaru Select Monitor ABS (DIAGNOSTICS) Step Check CHECK HARNESS CONNECTOR BETWEEN Is the resistance less than 0.5 Go to step 12. Repair the open Ω? ABSCM&H/U AND CHASSIS GROUND. circuit in harness 1) Turn the ignition switch to OFF. between 2) Disconnect the connector from ABSCM&H/...
  • Page 22 • ABS warning light does not go off. • “NO TROUBLE CODE” will be displayed on the Subaru Select Monitor. NOTE: When the ABS warning light is OFF and “NO TROUBLE CODE” is displayed on Subaru Select Monitor, the system is in normal condition. ABS(diag)-21...
  • Page 23 Subaru Select Monitor ABS (DIAGNOSTICS) WIRING DIAGRAM: • LHD model BATTERY SBF-1 IGNITION SWITCH No.5 COMBINATION METER GROUND TERMINAL B301 ABSCM & H/U B301 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11...
  • Page 24 Subaru Select Monitor ABS (DIAGNOSTICS) • RHD model BATTERY SBF-1 IGNITION SWITCH No.5 COMBINATION METER GROUND TERMINAL B301 ABSCM & H/U B301 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 3 4 5 6...
  • Page 25 Subaru Select Monitor ABS (DIAGNOSTICS) Step Check DATA CHECK SUBARU SELECT MONITOR. Is “ON” indicated? Replace the Go to step 2. 1) Select {Current Data Display & Save} in ABSCM only. Subaru Select Monitor. <Ref. to ABS-8, 2) Read the condition of “ABS warning light”.

  • Page 26: Read Diagnostic Trouble Code (Dtc)

    Read Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) 7. Read Diagnostic Trouble Code (DTC) A: OPERATION For details about reading of DTCs, refer to “Subaru Select Monitor”. <Ref. to ABS(diag)-15, Subaru Se- lect Monitor.> ABS(diag)-25...

  • Page 27: Inspection Mode

    Inspection Mode ABS (DIAGNOSTICS) 8. Inspection Mode A: PROCEDURE Reproduce the malfunction occurrence condition as possible. Drive the vehicle at a speed more than 40 km/h (25 MPH) for at least one minute. ABS(diag)-26...

  • Page 28: Clear Memory Mode

    Clear Memory Mode ABS (DIAGNOSTICS) 9. Clear Memory Mode A: OPERATION For details concerning DTC clear operation, refer to “Subaru Select Monitor”. <Ref. to ABS(diag)-15, Subaru Select Monitor.> ABS(diag)-27...

  • Page 29: Abs Warning Light / Brake Warning Light Illumination Pattern

    ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) 10.ABS Warning Light / Brake Warning Light Illumination Pattern A: INSPECTION (10) (11) ABS00442 Ignition switch ABS warning light Brake warning light (EBD warning light) Light OFF Light ON (10) Parking brake Start...
  • Page 30 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) 1) When the ABS warning light and brake warning light do not illuminate in accordance with this illumination pattern, there must be an electrical malfunction. 2) When ABS warning light remains constantly OFF, check the combination meter circuit. <Ref. to ABS(di- ag)-30, ABS WARNING LIGHT DOES NOT COME ON, ABS Warning Light / Brake Warning Light Illumina- tion Pattern.>...
  • Page 31 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) B: ABS WARNING LIGHT DOES NOT COME ON DETECTING CONDITION: • Defective combination meter • Defective harness TROUBLE SYMPTOM: When the ignition switch is turned to ON (engine OFF), ABS warning light does not come on. WIRING DIAGRAM: •...
  • Page 32 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) • RHD model BATTERY SBF-1 IGNITION SWITCH No.5 COMBINATION METER GROUND TERMINAL B301 ABSCM & H/U B301 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 3 4 5 6 16 17 18 19 20 21 22 23 24 25 26 5 6 7 8 9 10...
  • Page 33 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) Step Check CHECK ILLUMINATION OF OTHER LIGHTS. Do other warning lights illumi- Go to step 2. Check the combi- Turn the ignition switch to ON. (engine OFF) nate? nation meter. READ DTC.
  • Page 34 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) C: ABS WARNING LIGHT DOES NOT GO OFF DETECTING CONDITION: • Defective combination meter • Open in harness TROUBLE SYMPTOM: When starting the engine, the ABS warning light is kept on. WIRING DIAGRAM: •...
  • Page 35 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) • RHD model BATTERY SBF-1 IGNITION SWITCH No.5 COMBINATION METER GROUND TERMINAL B301 ABSCM & H/U B301 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 3 4 5 6 16 17 18 19 20 21 22 23 24 25 26 5 6 7 8 9 10...
  • Page 36 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) Step Check READ DTC. Is DTC displayed? Perform the diag- Go to step 2. Read the DTC. <Ref. to ABS(diag)-25, Read nosis according to Diagnostic Trouble Code (DTC).> DTC. CHECK WIRING HARNESS.
  • Page 37 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) D: BRAKE WARNING LIGHT DOES NOT GO OFF DETECTING CONDITION: • Brake warning light circuit is shorted. • Defective sensor/connector TROUBLE SYMPTOM: After starting the engine, the brake warning light is kept on though the parking lever is released. WIRING DIAGRAM: •...
  • Page 38 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) • RHD model BATTERY SBF-1 IGNITION SWITCH NO.5 BRAKE FLUID LEVEL SWITCH B301 ABSCM & H/U B229 PARKING BRAKE SWITCH B301 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 16 17 18 19 20 21 22 23 24 25 26 5 6 7 8 9 10 B229...
  • Page 39 ABS Warning Light / Brake Warning Light Illumination Pattern ABS (DIAGNOSTICS) Step Check CHECK INSTALLATION OF ABSCM&H/U Is the connector correctly Go to step 2. Insert the CONNECTOR. inserted? ABSCM&H/U con- 1) Turn the ignition switch to OFF. nector until the 2) Check that the ABSCM&H/U connector is clamp locks onto inserted to ABSCM&H/U until the clamp locks...

  • Page 40: List Of Diagnostic Trouble Code (Dtc)

    List of Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) 11.List of Diagnostic Trouble Code (DTC) A: LIST Content of diagnosis Display Reference target <Ref. to ABS(diag)-42, DTC C0101 ABS Rear Right ABS Sen- WHEEL SPEED SENSOR RR MALFUNC- Rear ABS wheel C0101 sor Circuit Open or TION (BROKEN WIRE, INPUT VOLTAGE...
  • Page 41 List of Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Content of diagnosis Display Reference target <Ref. to ABS(diag)-51, DTC C0115 ABS ABS wheel speed sen- Abnormal ABS wheel WHEEL SPEED SENSOR SIGNAL MAL- sor malfunction (ABS Any One of Four ABS C0115 speed sensor on any FUNCTION IN ONE OF FOUR WHEELS,...
  • Page 42 List of Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Content of diagnosis Display Reference target <Ref. to ABS(diag)-60, DTC C0127 REAR OUTLET SOLENOID VALVE RH MAL- Outlet valve malfunc- RR Pressure Reduc- FUNCTION IN ABS CONTROL MODULE C0127 Rear outlet valve RH tion in hydraulic unit ing Valve malfunction AND HYDRAULIC CONTROL UNIT...

  • Page 43: Diagnostic Procedure With Diagnostic Trouble Code (Dtc)

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) 12.Diagnostic Procedure with Diagnostic Trouble Code (DTC) A: DTC C0101 ABS WHEEL SPEED SENSOR RR MALFUNCTION (BROKEN WIRE, INPUT VOLTAGE TOO HIGH) NOTE: For the diagnostic procedure, refer to DTC C0104. <Ref. to ABS(diag)-43, DTC C0104 ABS WHEEL SPEED SENSOR FL MALFUNCTION (BROKEN WIRE, INPUT VOLTAGE TOO HIGH), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 44 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) D: DTC C0104 ABS WHEEL SPEED SENSOR FL MALFUNCTION (BROKEN WIRE, INPUT VOLTAGE TOO HIGH) DTC DETECTING CONDITION: • Defective ABS wheel speed sensor (broken wire, input voltage too high) • Defective harness connector TROUBLE SYMPTOM: ABS does not operate.
  • Page 45 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) • RHD model B301 ABSCM & H/U FRONT ABS FRONT ABS REAR ABS REAR ABS WHEEL SPEED WHEEL SPEED WHEEL SPEED WHEEL SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH B301 1 2 3 4 5 6 7 8 9...
  • Page 46 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK POOR CONTACT IN CONNECTOR. Is there poor contact? Repair the con- Go to step 2. Check the poor contact between ABSCM&H/U nector. and ABS wheel speed sensor. CHECK HARNESS CONNECTOR BETWEEN Is the resistance less than 0.5 Go to step 3.
  • Page 47 2) Erase the memory. <Ref. to ABS-8, 3) Perform the inspection mode. <Ref. to REPLACEMENT, ABS(diag)-17, CLEAR MEMORY MODE, ABS Control Mod- OPERATION, Subaru Select Monitor.> ule and Hydraulic 4) Read the DTC. Control Unit (ABSCM&H/U).> CHECK ANY OTHER DTC ON DISPLAY.
  • Page 48 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) H: DTC C0108 ABS WHEEL SPEED SENSOR FL MALFUNCTION (ABS WHEEL SPEED SENSOR ABNORMAL SIGNAL) DTC DETECTING CONDITION: • Defective ABS wheel speed sensor signal (noise, abnormal signal, etc.) • Defective harness connector TROUBLE SYMPTOM: ABS does not operate.
  • Page 49 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) • RHD model B301 ABSCM & H/U FRONT ABS FRONT ABS REAR ABS REAR ABS WHEEL SPEED WHEEL SPEED WHEEL SPEED WHEEL SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH B301 1 2 3 4 5 6 7 8 9...
  • Page 50 2) Read the ABS wheel speed sensor output in the straight-ahead position? corresponding to the faulty wheel in Subaru Select Monitor data display mode. CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in con- Repair the con- Go to step 3.
  • Page 51 2) Erase the memory. <Ref. to ABS-8, 3) Perform the inspection mode. <Ref. to REPLACEMENT, ABS(diag)-17, CLEAR MEMORY MODE, ABS Control Mod- OPERATION, Subaru Select Monitor.> ule and Hydraulic 4) Read the DTC. Control Unit (ABSCM&H/U).> CHECK ANY OTHER DTC ON DISPLAY.
  • Page 52 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) I: DTC C0115 ABS WHEEL SPEED SENSOR SIGNAL MALFUNCTION IN ONE OF FOUR WHEELS DTC DETECTING CONDITION: • Defective ABS wheel speed sensor signal (noise, abnormal signal, etc.) • Defective magnetic encoder •...

  • Page 53: Wiring Diagram

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) WIRING DIAGRAM: • LHD model B301 ABSCM & H/U FRONT ABS FRONT ABS REAR ABS REAR ABS WHEEL SPEED WHEEL SPEED WHEEL SPEED WHEEL SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH B301 4 5 6 7...

  • Page 54: Rhd Model

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) • RHD model B301 ABSCM & H/U FRONT ABS FRONT ABS REAR ABS REAR ABS WHEEL SPEED WHEEL SPEED WHEEL SPEED WHEEL SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH B301 1 2 3 4 5 6 7 8 9...
  • Page 55 1) Connect all the connectors. ABSCM only. 2) Erase the memory. <Ref. to ABS-8, 3) Perform the inspection mode. <Ref. to REPLACEMENT, ABS(diag)-17, CLEAR MEMORY MODE, ABS Control Mod- OPERATION, Subaru Select Monitor.> ule and Hydraulic 4) Read the DTC. Control Unit (ABSCM&H/U).> ABS(diag)-54...
  • Page 56 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Perform the diag- It results from a nosis according to temporary noise DTC. interference. NOTE: Though ABS warn- ing light remains to illuminate at this time, it is normal.
  • Page 57 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) M: DTC C0126 REAR INLET SOLENOID VALVE RH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U) DTC DETECTING CONDITION: • Defective harness connector • Defective inlet solenoid valve in ABSCM&H/U TROUBLE SYMPTOM: •...

  • Page 58: Abs Wiring Diagram

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH B301 ABSCM & H/U B301 1 2 3 4 5 6 7 8 9 10 11 16 17 18 19 20 21 22 23 24 25 26 ABS00414 ABS(diag)-57...
  • Page 59 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK INPUT VOLTAGE OF ABSCM&H/U. Is the voltage 10 — 15 V? Go to step 2. Repair the 1) Turn the ignition switch to OFF. ABSCM&H/U 2) Disconnect the connector from ABSCM&H/ power circuit.
  • Page 60 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) N: DTC C0121 FRONT OUTLET SOLENOID VALVE LH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U) NOTE: For the diagnostic procedure, refer to DTC C0127. <Ref. to ABS(diag)-60, DTC C0127 REAR OUTLET SO- LENOID VALVE RH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 61 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Q: DTC C0127 REAR OUTLET SOLENOID VALVE RH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U) DTC DETECTING CONDITION: • Defective harness connector • Defective outlet solenoid valve in ABSCM&H/U TROUBLE SYMPTOM: •...
  • Page 62 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH B301 ABSCM & H/U B301 1 2 3 4 5 6 7 8 9 10 11 16 17 18 19 20 21 22 23 24 25 26 ABS00414 ABS(diag)-61...
  • Page 63 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK INPUT VOLTAGE OF ABSCM&H/U. Is the voltage 10 — 15 V? Go to step 2. Repair the 1) Turn the ignition switch to OFF. ABSCM&H/U 2) Disconnect the connector from ABSCM&H/ power circuit.
  • Page 64 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) R: DTC C0110 ABS CONTROL MODULE MALFUNCTION DTC DETECTING CONDITION: Defective ABSCM&H/U TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate. NOTE: Brake warning light comes on as well as ABS warning light. WIRING DIAGRAM: B301 ABSCM &...
  • Page 65 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK GROUND CIRCUIT OF ABSCM&H/U. Is the resistance less than 0.5 Go to step 2. Repair the Ω? 1) Turn the ignition switch to OFF. ABSCM&H/U 2) Disconnect the connector from ABSCM&H/ ground harness.
  • Page 66 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) S: DTC C0109 POWER VOLTAGE MALFUNCTION DTC DETECTING CONDITION: Power voltage of the ABSCM&H/U is too low or too high. TROUBLE SYMPTOM: • ABS does not operate. • EBD may not operate. NOTE: If EBD does not operate, brake warning light comes on as well as ABS warning light.
  • Page 67 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH B301 ABSCM & H/U B301 1 2 3 4 5 6 7 8 9 10 11 16 17 18 19 20 21 22 23 24 25 26 ABS00414 ABS(diag)-66...
  • Page 68 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK GENERATOR. Is the voltage 10 — 15 V? Go to step 2. Repair the genera- 1) Start the engine. tor. 2) Run the engine at idle after warming up. 3) Measure the voltage between generator B terminal and chassis ground.
  • Page 69 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) T: DTC C0140 CAN COMMUNICATION MALFUNCTION DTC DETECTING CONDITION: Defective CAN communication TROUBLE SYMPTOM: Possibly the vehicle speed cannot output on CAN. Step Check CHECK LAN SYSTEM. Is there any fault in LAN sys- Repair it according Replace the Perform the diagnosis for LAN system.
  • Page 70 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) U: DTC C0114 VALVE RELAY MALFUNCTION DTC DETECTING CONDITION: Defective valve relay TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate depending on the trouble contents. NOTE: Brake warning light comes on as well as ABS warning light when EBD does not operate. WIRING DIAGRAM: BATTERY SBF-1...
  • Page 71 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK INPUT VOLTAGE OF ABSCM&H/U. Is the voltage 10 — 15 V? Go to step 2. Repair the har- 1) Turn the ignition switch to OFF. ness connector 2) Disconnect the connector from ABSCM&H/ between battery and ABSCM&H/U.
  • Page 72 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) V: DTC C0111 MOTOR/MOTOR RELAY MALFUNCTION DTC DETECTING CONDITION: • Defective motor • Defective motor relay • Defective harness connector TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: BATTERY SBF-1 SBF-2 IGNITION SWITCH B301...
  • Page 73 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK INPUT VOLTAGE OF ABSCM&H/U. Is the voltage 10 — 15 V? Go to step 2. Repair the har- 1) Turn the ignition switch to OFF. ness connector 2) Disconnect the connector from ABSCM&H/ between battery and ABSCM&H/U.
  • Page 74 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Inspect the DTC Temporary poor using “List of Diag- contact occurs. nostic Trouble NOTE: Code (DTC)”. Though ABS warn- <Ref.
  • Page 75 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) W: DTC C0116 FAULTY STOP LIGHT SWITCH DTC DETECTING CONDITION: Defective stop light switch WIRING DIAGRAM: BATTERY STOP LIGHT SWITCH B64 : OC B65 : WC B159 : WITH CRUISE CONTROL : WITHOUT CRUISE CONTROL B301 ABSCM &...
  • Page 76 1) Select {Current Data Display & Save} in Subaru Select Monitor. 2) Release the brake pedal. 3) Read the stop light switch signal in Subaru Select Monitor. CHECK OUTPUT OF STOP LIGHT SWITCH Is “ON” displayed on the dis- Go to step 5.

  • Page 77: C0118 G Sensor Output Voltage Malfunction

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) X: DTC C0118 G SENSOR OUTPUT VOLTAGE MALFUNCTION DTC DETECTING CONDITION: Defective G sensor TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: B301 ABSCM & H/U B292 ABS G SENSOR B292 B301 1 2 3 4 5 6 7 8 9 10 11 1 2 3...
  • Page 78 SUBARU SELECT MONITOR. 1) Select {Current Data Display & Save} in sensor is horizontal? Subaru Select Monitor. 2) Read the G sensor output on Subaru Select Monitor. CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in con- Repair the con- Go to step 3.
  • Page 79 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK G SENSOR. Is the voltage 3.6 — 4.1 V Go to step 10. Replace G sen- Measure the voltage between G sensor con- when G sensor is inclined for- sor.

  • Page 80: C0119 G Sensor Output Voltage Malfunction

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Y: DTC C0119 G SENSOR OUTPUT VOLTAGE MALFUNCTION DTC DETECTING CONDITION: Defective G sensor output signal TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: B301 ABSCM & H/U B292 ABS G SENSOR B292 B301 1 2 3 4 5 6 7 8 9 10 11...
  • Page 81 SUBARU SELECT MONITOR. 1) Select {Current Data Display & Save} in sensor is on a level? Subaru Select Monitor. 2) Read the Subaru Select Monitor display. CHECK OUTPUT OF G SENSOR USING Is the reading indicated on dis- Go to step 4.
  • Page 82 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTICS) Step Check CHECK G SENSOR. Is the voltage 2.1 — 2.5 V Go to step 11. Replace G sen- 1) Remove the console box. when G sensor is on a level? sor.

  • Page 83: General Diagnostic Table

    General Diagnostic Table ABS (DIAGNOSTICS) 13.General Diagnostic Table A: INSPECTION Symptom Problem parts • ABSCM&H/U (solenoid valve) • ABS wheel speed sensor • Brake (caliper, piston and pads) Vehicle is pulled to either right or • Wheel Alignment left side. •...

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