Subaru Forester 2004 Service Manual
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Subaru Forester 2004 Service Manual

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2004 FORESTER 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
DIFFERENTIAL
TRANSFER CASE
DRIVE SHAFT SYSTEM
ABS
ABS (DIAGNOSTIC)
BRAKE
PARKING BRAKE
POWER ASSISTED SYSTEM
(POWER STEERING)
FS
RS
WT
DI
TC
DS
ABS
ABS
BR
PB
PS
G8080GE6

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  • Page 1 FRONT SUSPENSION REAR SUSPENSION WHEEL AND TIRE SYSTEM DIFFERENTIAL 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. DRIVE SHAFT SYSTEM...

  • Page 2: Table Of Contents

    Basic Diagnostic Procedure ................2 Check List for Interview................6 General Description ..................10 Electrical Components Location..............12 Control Module I/O Signal .................14 Subaru Select Monitor................18 Read Diagnostic Trouble Code (DTC) ............21 Inspection Mode..................22 Clear Memory Mode..................23 ABS Warning Light Illumination Pattern ............24 List of Diagnostics Trouble Code (DTC) ...........25 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ....29...

  • Page 3: Basic Diagnostic Procedure

    Basic Diagnostic Procedure ABS (DIAGNOSTIC) 1. Basic Diagnostic Procedure A: PROCEDURE 1. WITHOUT SUBARU SELECT MONITOR CAUTION: Remove foreign matter (dust, water, etc.) from the ABSCM&H/U connector during removal and instal- lation. NOTE: • To check the harness for broken wires or short circuits, shake it while holding it or the connector.
  • Page 4 NOTE: For DTC list, refer to “List of Diagnostics Trou- ble Code (DTC)”. <Ref. to ABS-25, WITHOUT SUBARU SELECT MONITOR, LIST, List of Di- agnostics Trouble Code (DTC).> 2) Perform the clear memory mode. <Ref. to ABS-23, WITHOUT SUBARU SELECT MONI- TOR, OPERATION, Clear Memory Mode.>...
  • Page 5 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 Subaru Select Monitor cannot be executed normally, check communication circuit.
  • Page 6 Is DTC displayed? Inspect using Complete the 1) Refer to “List of Diagnostics Trouble Code “Diagnostics Pro- diagnosis. (DTC)”. <Ref. to ABS-27, WITH SUBARU cedure with Diag- SELECT MONITOR, LIST, List of Diagnostics nostic Trouble Trouble Code (DTC).> Code (DTC)”.

  • Page 7: Check List For Interview

    Check List for Interview ABS (DIAGNOSTIC) 2. Check List for Interview A: INSPECTION 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 8 Check List for Interview ABS (DIAGNOSTIC) 2. STATE OF BRAKE WARNING LIGHT ❏ Always Brake warning light ❏ Sometimes comes on. ❏ Only once ❏ Not come on ❏ When pulling the parking brake lever up. ❏ When releasing the parking brake lever down. •...
  • Page 9 Check List for Interview ABS (DIAGNOSTIC) 3. SYMPTOMS ❏ Does not move. ABS operating condi- tion ❏ Operates only when applying an abrupt brake. Vehicle speed: km/h • How to step on brake pedal: a) Operating time: Sec. b) Operating noise: ❏ Occurs. / ❏ Does not occur. ❏...
  • Page 10 Check List for Interview ABS (DIAGNOSTIC) 4. CONDITIONS UNDER WHICH TROUBLE OCCURS ❏ Fine Environment a) Weather ❏ Cloudy ❏ Rainy ❏ Snowy ❏ Others: °C (°F) b) Ambient temperature ❏ Inner city c) Road ❏ Suburbs ❏ Highway ❏ Local street ❏...

  • Page 11: General Description

    General Description ABS (DIAGNOSTIC) 3. General Description B: INSPECTION Before performing diagnostics, check the following A: CAUTION items which might affect ABS problems: 1. SUPPLEMENTAL RESTRAINT SYSTEM 1. BATTERY “AIRBAG” Measure the battery voltage and check electrolyte. Airbag system wiring harness is routed near the Standard voltage: 12 V or more ABS wheel speed sensor and ABSCM&H/U.

  • Page 12: Special Tool

    REMARKS 24082AA230 CARTRIDGE Troubleshooting for electrical systems. (Newly adopted tool) ST24082AA230 22771AA030 SUBARU SELECT Troubleshooting for electrical systems. MONITOR KIT • English: 22771AA030 (Without printer) • German: 22771AA070 (Without printer) • French: 22771AA080 (Without printer) • Spanish: 22771AA090 (Without printer) ST22771AA030 2.

  • Page 13: Electrical Components Location

    4. Electrical Components Location A: LOCATION (13) (10) (11) (12) ABS00100 ABS control module and hydraulic Data link connector (for Subaru Wheel cylinder control unit (ABSCM&H/U) Select Monitor) (10) G sensor Proportioning valve (model with- Transmission control module (AT (11)
  • Page 14 Electrical Components Location ABS (DIAGNOSTIC) ABS00101 ABS00106 (13) ABS00177 ABS00103 FRONT REAR ABS00107 ABS00104 (10) ABS00102 ABS-13...

  • Page 15: Control Module I/O Signal

    Control Module I/O Signal ABS (DIAGNOSTIC) 5. Control Module I/O Signal A: ELECTRICAL SPECIFICATION B301 or 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 27 28 29 30 31 ABS00182 ABS control module and hydraulic Connector switch...
  • Page 16 5.5 V when ABS does not operate. Data is received. 20 — 23 Less than 1.5 V when no data is received. Subaru Select Moni- tor*2 Data is sent. 5 — 23 4.75 — 5.25 V when no data is sent.
  • Page 17 Control Module I/O Signal ABS (DIAGNOSTIC) B: WIRING DIAGRAM (16) (17) (18) (19) (20) (21) (22) (23) (10) (11) (12) (24) (13) (25) (14) (26) (15) (27) ABS00109 Battery (11) Front outlet solenoid valve RH (21) Stop light switch Ignition switch (12) Rear inlet solenoid valve LH (22)
  • Page 18 Control Module I/O Signal ABS (DIAGNOSTIC) C: WAVEFORM 20 Hz:0.12 20 Hz ABS00400 (1) ABS wheel speed sensor (2) Terminal No. (3) Standard output voltage ABS-17...

  • Page 19: Subaru Select Monitor

    Select Monitor and OBD-II general scan tool. (DTC) 5) Turn the ignition switch to ON (engine OFF) and 1) Prepare the Subaru Select Monitor kit. <Ref. to Subaru Select Monitor switch to ON. ABS-11, SPECIAL TOOL, PREPARATION TOOL, General Description.>...

  • Page 20: Clear Memory Mode

    ABS operation signal from ABS control module to TCM ON or OFF NOTE: For detailed operation procedure, refer to the “SUBARU SELECT MONITOR OPERATION MANUAL”. 3. CLEAR MEMORY MODE 1) On the «Main Menu» display screen, select the 4) On the «Brake Control Diagnosis» display {Each System Check} and press [YES] key.
  • Page 21 Subaru Select Monitor ABS (DIAGNOSTIC) 5) When the “Done” and “turn ignition switch to Display Contents to be monitored OFF” are shown on display screen, turn the Subaru ABS operation ABS operation signal Select Monitor and ignition switch to OFF. signal...

  • Page 22: Read Diagnostic Trouble Code (Dtc)

    1.2 sec. Start code Diagnostic trouble code (DTC): 22 Diagnostic trouble code (DTC): 31 2. WITH SUBARU SELECT MONITOR Refer to “SUBARU SELECT MONITOR” for information about how to obtain and understand DTCs. <Ref. to ABS-18, Subaru Select Monitor.> ABS-21...

  • Page 23: Inspection Mode

    Inspection Mode ABS (DIAGNOSTIC) 8. Inspection Mode A: OPERATION Reproduce the condition under which the problem has occurred as much as possible. Drive the vehicle at a speed more than 40 km/h (25 MPH) for at least 1 minute. ABS-22...

  • Page 24: Clear Memory Mode

    After the diagnostics is completed, make sure to clear memory. Make sure only start code (11) is shown after memory is cleared. 2. WITH SUBARU SELECT MONITOR Refer to “Subaru Select Monitor” for information about how to clear DTC. <Ref. to ABS-18, Subaru Select Monitor.> ABS-23...

  • Page 25: Abs Warning Light Illumination Pattern

    ABS Warning Light Illumination Pattern ABS (DIAGNOSTIC) 10.ABS Warning Light Illumination Pattern A: INSPECTION ABS00403 Ignition switch Illuminates ABS warning light START 1.5 sec. Goes out 1) When the ABS warning light does not illuminate in accordance with this illumination pattern, there must be an electrical malfunction.

  • Page 26: List Of Diagnostics Trouble Code (Dtc)

    List of Diagnostics Trouble Code (DTC) ABS (DIAGNOSTIC) 11.List of Diagnostics Trouble Code (DTC) A: LIST 1. WITHOUT SUBARU SELECT MONITOR Contents of diagnosis Index No. Start code • DTC is shown after start code. — • Only start code is shown in normal condition.
  • Page 27 List of Diagnostics Trouble Code (DTC) ABS (DIAGNOSTIC) Contents of diagnosis Index No. <Ref. to ABS-67, DTC 31 ABNORMAL INLET SOLENOID VALVE Front inlet valve RH CIRCUIT(S) IN ABSCM&H/U (FRONT RH), Diagnostics Procedure without Diagnostic Trouble Code (DTC).> <Ref. to ABS-71, DTC 32 ABNORMAL OUTLET SOLENOID VALVE Front outlet valve RH CIRCUIT(S) IN ABSCM&H/U (FRONT RH), Diagnostics Procedure without Diagnostic Trouble Code (DTC).>...
  • Page 28 List of Diagnostics Trouble Code (DTC) ABS (DIAGNOSTIC) 2. WITH SUBARU SELECT MONITOR Sub code No. Display screen Contents of diagnosis Index No. <Ref. to ABS-94, COMMUNICATION FOR INITIALIZ- Communication for Select monitor com- — — ING IMPOSSIBLE, Diagnostics Procedure with Diagnos-...
  • Page 29 List of Diagnostics Trouble Code (DTC) ABS (DIAGNOSTIC) Sub code No. Display screen Contents of diagnosis Index No. <Ref. to ABS-129, DTC 38 REAR LEFT OUTLET Rear outlet valve LH Rear outlet valve LH 3E00 VALVE MALFUNCTION, Diagnostics Procedure with malfunction malfunction Diagnostic Trouble Code (DTC).>...

  • Page 30: Diagnostics Procedure Without Diagnostic Trouble Code (Dtc)

    Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 12.Diagnostics Procedure without Diagnostic Trouble Code (DTC) A: ABS WARNING LIGHT DOES NOT COME ON. DIAGNOSIS: ABS warning light circuit is open or shorted. TROUBLE SYMPTOM: When the ignition switch is turned to ON (engine OFF), ABS warning light does not come on. ABS-29...
  • Page 31 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: • LHD model BATTERY SBF-3 SBF-1 IGNITION SWITCH No.14 COMBINATION METER :TURBO MODEL DIAGNOSIS TERMINAL B301 ABSCM&H/U B301 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 32 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model BATTERY SBF-3 SBF-1 IGNITION SWITCH No.14 COMBINATION METER DIAGNOSIS TERMINAL ABSCM&H/U 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 10 11 12 13 14 15 19 20...

  • Page 33: Brake Warning

    Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK IF OTHER WARNING LIGHTS TURN Are other warning lights turned Go to step 2. Repair the combi- nation meter. Turn the ignition switch to ON (engine OFF). <Ref. to IDI-10, Combination Meter Assembly.>...
  • Page 34 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK BATTERY SHORT OF ABS AND Is the voltage less than 3 V? Go to step 8. Repair the wiring BRAKE WARNING LIGHT HARNESS. harness. 1) Turn the ignition switch to ON. 2) Measure the voltage between connector (B37) or (F45) and chassis ground.
  • Page 35 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) B: ABS WARNING LIGHT DOES NOT GO OFF. DIAGNOSIS: ABS warning light circuit is open or shorted. TROUBLE SYMPTOM: When starting the engine and while ABS warning light is kept ON. WIRING DIAGRAM: •...
  • Page 36 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model BATTERY SBF-3 SBF-1 IGNITION SWITCH No.14 COMBINATION METER DIAGNOSIS TERMINAL ABSCM&H/U 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 10 11 12 13 14 15 19 20...
  • Page 37 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK INSTALLATION OF ABSCM&H/U Is the ABSCM&H/U connector Go to step 2. Insert the CONNECTOR. inserted into ABSCM until the ABSCM&H/U con- Turn the ignition switch to OFF. clamp locks onto it? nector into ABSCM&H/U until the clamp locks...
  • Page 38 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABSCM&H/U. Is the resistance more than 1 Go to step 10. Replace the Measure the resistance between ABSCM&H/U MΩ? ABSCM only. terminals. <Ref. to ABS-8, Terminal ABSCM (ABS No.
  • Page 39 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) C: ABS AND BRAKE WARNING LIGHT DO NOT GO OFF. DIAGNOSIS: • ABS warning light circuit is open or shorted. • Brake warning light circuit is shorted. • Faulty sensor/connector TROUBLE SYMPTOM: •...
  • Page 40 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: • LHD model BATTERY SBF-1 IGNITION SWITCH NO.14 :TURBO MODEL BRAKE FLUID LEVEL SWITCH B301 ABSCM&H/U B301 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 12 13 14 15 16 17 18 19 20 21 22 23 24...
  • Page 41 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model BATTERY SBF-1 IGNITION SWITCH NO.14 BRAKE FLUID LEVEL SWITCH ABSCM&H/U B301 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 12 13 14 15 16 17 18 19 20 21 22 23 24 16 17 18 19 20 21 22...
  • Page 42 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK BRAKE FLUID AMOUNT. Is the brake fluid amount Go to step 2. Fill the brake fluid Check the amount of brake fluid in reservoir between “MAX” line and “MIN” to specified tank of master cylinder.
  • Page 43 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) D: TROUBLE CODE DOES NOT APPEAR. DIAGNOSIS: Diagnosis circuit is open. TROUBLE SYMPTOM: The ABS warning light turns on or off normally but the start code cannot be read out in diagnostic mode. WIRING DIAGRAM: •...
  • Page 44 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model BATTERY SBF-3 SBF-1 IGNITION SWITCH No.14 COMBINATION METER DIAGNOSIS TERMINAL ABSCM&H/U 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 10 11 12 13 14 15 19 20...
  • Page 45 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK GROUND TERMINAL. Is the resistance less than 0.5 Go to step 2. Repair the ground Ω? 1) Turn the ignition switch to OFF. terminal harness. 2) Measure the resistance between ground terminals (B81) and chassis ground.
  • Page 46 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) E: DTC 21 ABNORMAL ABS SENSOR (OPEN CIRCUIT OR INPUT VOLTAGE TOO HIGH) (FRONT RH) NOTE: For the diagnostic procedure, refer to DTC 27. <Ref. to ABS-46, DTC 27 ABNORMAL ABS SENSOR (OPEN CIRCUIT OR INPUT VOLTAGE TOO HIGH) (REAR LH), Diagnostics Procedure without Diagnostic Trouble Code (DTC).>...
  • Page 47 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) H: DTC 27 ABNORMAL ABS SENSOR (OPEN CIRCUIT OR INPUT VOLTAGE TOO HIGH) (REAR LH) DIAGNOSIS: • Faulty ABS wheel speed sensor (Broken harness, input voltage too high) • Faulty harness connector TROUBLE SYMPTOM: ABS does not operate.
  • Page 48 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: • LHD model B301 ABSCM&H/U B321 F103 B321 F103 FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH F103 B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 49 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 5 6 7 8 9...
  • Page 50 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABS WHEEL SPEED SENSOR. Is the resistance the following Go to step 2. Replace the ABS 1) Turn the ignition switch to OFF. value? wheel speed sen- 2) Disconnect the connector from ABS wheel Front: 1 —...
  • Page 51 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK BATTERY SHORT OF HARNESS. Is the voltage less than 1 V? Go to step 6. Repair the har- Measure the voltage between ABSCM&H/U ness between connector and chassis ground. ABSCM&H/U and Connector &...
  • Page 52 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABS WHEEL SPEED SENSOR GAP. Is the gap the following value? Go to step 9. Adjust the gap. Measure the gap between ABS wheel speed Front wheel: NOTE: sensor piece and tone wheel.
  • Page 53 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABSCM&H/U. Is the same DTC as in current Replace the Go to step 14. 1) Connect all connectors. diagnosis still being output? ABSCM only. 2) Erase the memory. <Ref.
  • Page 54 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) I: DTC 22 ABNORMAL ABS SENSOR (ABNORMAL ABS SENSOR SIGNAL) (FRONT RH) NOTE: For the diagnostic procedure, refer to DTC 28. <Ref. to ABS-54, DTC 28 ABNORMAL ABS SENSOR (AB- NORMAL ABS SENSOR SIGNAL) (REAR LH), Diagnostics Procedure without Diagnostic Trouble Code (DTC).>...
  • Page 55 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) L: DTC 28 ABNORMAL ABS SENSOR (ABNORMAL ABS SENSOR SIGNAL) (REAR LH) DIAGNOSIS: • Faulty ABS wheel speed sensor signal (noise, irregular signal, etc.) • Faulty harness connector TROUBLE SYMPTOM: ABS does not operate. ABS-54...
  • Page 56 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: • LHD model B301 ABSCM&H/U B321 F103 B321 F103 FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH F103 B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 57 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 5 6 7 8 9...
  • Page 58 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK INSTALLATION OF ABS WHEEL Are the ABS wheel speed sen- Go to step 2. Tighten the ABS SPEED SENSOR. sor installation bolts tightened wheel speed sen- Turn the ignition switch to OFF. 33 N·m (3.4 kgf-m, 24.6 ft-lb)? sor installation bolts securely.
  • Page 59 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK DAMAGE OF THE ABS WHEEL Are there broken or damaged Replace the ABS Go to step 7. SPEED SENSOR OR THE TONE WHEEL. in the ABS wheel speed sen- wheel speed sen- sor piece or the tone wheel? sor or the tone...
  • Page 60 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK HARNESS CONNECTOR BETWEEN Is the resistance the following Go to step 11. Repair the har- ABSCM&H/U AND ABS WHEEL SPEED value? ness connector SENSOR. Front: 1 — 1.5 kΩ between 1) Connect the connector to ABS wheel speed Rear: 1.025 —...
  • Page 61 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK SHIELD CIRCUIT. Is the resistance less than 0.5 Go to step 17. Repair the shield Ω? 1) Disconnect the connectors (B303) and harness. (F62). 2) Measure the resistance between shield connector and chassis ground.
  • Page 62 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) M: DTC 29 ABNORMAL ABS SENSOR (ABNORMAL ABS SENSOR SIGNAL) (ANY ONE OF FOUR) DIAGNOSIS: • Faulty ABS wheel speed sensor signal (noise, irregular signal, etc.) • Faulty tone wheel • Wheels turning freely for a long time TROUBLE SYMPTOM: •...
  • Page 63 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: • LHD model B301 ABSCM&H/U B321 F103 B321 F103 FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH F103 B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 64 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 5 6 7 8 9...
  • Page 65 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK IF THE WHEELS HAVE TURNED Have the wheels been turned The ABS is nor- Go to step 2. FREELY FOR A LONG TIME. freely? mal. Erase the Check if the wheels have been turned freely for DTC.
  • Page 66 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABS WHEEL SPEED SENSOR SIG- Is an oscilloscope pattern Go to step 12. Go to step 9. NAL. smooth, as shown in the fig- 1) Raise all four wheels off ground. ure? <Ref.
  • Page 67 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABSCM&H/U. Is the same DTC as in current Replace the Go to step 13. 1) Turn the ignition switch to OFF. diagnosis still being output? ABSCM only. 2) Connect all connectors. <Ref.
  • Page 68 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) N: DTC 31 ABNORMAL INLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/U (FRONT RH) NOTE: For the diagnostic procedure, refer to DTC 37. <Ref. to ABS-68, DTC 37 ABNORMAL INLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/U (REAR LH), Diagnostics Procedure without Diagnostic Trouble Code (DTC).>...
  • Page 69 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Q: DTC 37 ABNORMAL INLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/U (REAR LH) DIAGNOSIS: • Faulty harness connector • Faulty inlet solenoid valve in ABSCM&H/U TROUBLE SYMPTOM: • ABS does not operate. •...
  • Page 70 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH : LHD MODEL : RHD MODEL B301 ABSCM&H/U B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 27 28 29 30 31 ABS00229 ABS-69...
  • Page 71 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 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& between ABS H/U.
  • Page 72 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) R: DTC 32 ABNORMAL OUTLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/ U (FRONT RH) NOTE: For the diagnostic procedure, refer to DTC 38. <Ref. to ABS-72, DTC 38 ABNORMAL OUTLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/U (REAR LH), Diagnostics Procedure without Diagnostic Trouble Code (DTC).>...
  • Page 73 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) U: DTC 38 ABNORMAL OUTLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/ U (REAR LH) DIAGNOSIS: • Faulty harness connector • Faulty outlet solenoid valve in ABSCM&H/U TROUBLE SYMPTOM: • ABS does not operate. •...
  • Page 74 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH : LHD MODEL : RHD MODEL B301 ABSCM&H/U B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 27 28 29 30 31 ABS00229 ABS-73...
  • Page 75 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK INPUT VOLTAGE OF ABSCM&H/U. Is the voltage 10 — 15 V? Go to step 2. Repair the power 1) Turn the ignition switch to OFF. supply circuit and 2) Disconnect the connector from ABSCM&...
  • Page 76 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) V: DTC 41 ABNORMAL ABS CONTROL MODULE DIAGNOSIS: Faulty ABSCM&H/U. TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate. NOTE: In addition to the ABS warning light, brake warning light illuminates. WIRING DIAGRAM: B301 ABSCM&H/U...
  • Page 77 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 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& ground harness.
  • Page 78 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) W: DTC 42 SOURCE VOLTAGE IS ABNORMAL. DIAGNOSIS: Power source voltage of the ABSCM&H/U is low or high. TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate. NOTE: In addition to the ABS warning light, brake warning light illuminates temporarily.
  • Page 79 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH : LHD MODEL : RHD MODEL B301 ABSCM&H/U B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 27 28 29 30 31 ABS00229 ABS-78...
  • Page 80 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK GENERATOR. Is the voltage 10 — 17 V? Go to step 2. Repair the genera- 1) Start the engine. tor. <Ref. to 2) Idle after warm-up. SC(H4SO)-15, 3) Measure the voltage between generator B Generator.>...
  • Page 81 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) X: DTC 44 A COMBINATION OF AT CONTROL ABNORMAL DIAGNOSIS: Combination of AT control faults TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: B301 ABSCM&H/U : LHD MODEL : RHD MODEL : TURBO MODEL : NON-TURBO MODEL : TURBO MODEL : A12...
  • Page 82 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK SPECIFICATIONS OF THE Are the specifications between Go to step 2. Replace the ABSCM&H/U. vehicle and ABSCM&H/U ABSCM&H/U. Check specifications of the mark to on matched? <Ref. to ABS-7, ABSCM&H/U.
  • Page 83 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABSCM&H/U. Is the same DTC as in the cur- Replace the Go to step 10. 1) Turn the ignition switch to OFF. rent diagnosis still being out- ABSCM only. 2) Connect all connectors.
  • Page 84 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Y: DTC 51 ABNORMAL VALVE RELAY DIAGNOSIS: Faulty valve relay TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate in some malfunctions. NOTE: In addition to the ABS warning light, brake warning light illuminates, if the EBD does not operate. WIRING DIAGRAM: BATTERY SBF-3...
  • Page 85 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 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& between battery, H/U.
  • Page 86 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Z: DTC 52 ABNORMAL MOTOR AND/OR MOTOR RELAY DIAGNOSIS: • Faulty motor • Faulty motor relay • Faulty harness connector TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: BATTERY SBF-1 IGNITION SWITCH : LHD MODEL : RHD MODEL...
  • Page 87 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 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& between battery H/U.
  • Page 88 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ANY OTHER DIAGNOSTIC TROU- Are other DTCs being output? Proceed with the A temporary poor BLE CODES (DTCs) APPEARANCE. diagnosis corre- contact. sponding to DTC. NOTE: Although the ABS warning light re- mains illuminating at this point, this is...

  • Page 89: Stop Light

    Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AA:DTC 54 ABNORMAL STOP LIGHT SWITCH DIAGNOSIS: Faulty stop light switch TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: BATTERY STOP LIGHT SWITCH WITHOUT CRUISE CONTROL WC : WITH CRUISE CONTROL : LHD MODEL B301 ABSCM&H/U...
  • Page 90 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK STOP LIGHTS COME ON. Do the stop lights come on? Go to step 2. Repair the stop Depress the brake pedal. lights circuit. CHECK OPEN CIRCUIT IN HARNESS. Is the voltage 10 —...
  • Page 91 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AB:DTC 56 ABNORMAL G SENSOR OUTPUT VOLTAGE DIAGNOSIS: Faulty G sensor output voltage TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: • LHD model B301 ABSCM&H/U F103 B292 G SENSOR B292 F103 B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 92 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR B292 G SENSOR B292 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 1 2 3 16 17 18 19 20 21 22 10 11 12 13 14 15 16 17 18...
  • Page 93 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ALL FOUR WHEELS FOR FREE Have the wheels been turned The ABS is nor- Go to step 2. TURNING. freely such as when the vehicle mal. Erase the is lifted up, or operated on a DTC.
  • Page 94 Diagnostics Procedure without Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK GROUND SHORT OF HARNESS. Is the resistance more than 1 Go to step 9. Repair the har- Measure the resistance between ABSCM&H/U MΩ? ness between G connector and chassis ground. sensor and Connector &...

  • Page 95: Diagnostics Procedure With Diagnostic Trouble Code (Dtc)

    Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 13.Diagnostics Procedure with Diagnostic Trouble Code (DTC) A: COMMUNICATION FOR INITIALIZING IMPOSSIBLE DIAGNOSIS: Faulty harness connector TROUBLE SYMPTOM: ABS warning light remains on. WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH DATA LINK CONNECTOR : LHD MODEL : RHD MODEL...
  • Page 96 Is the ignition switch turned to Go to step 2. Turn the ignition switch to ON, and select ABS mode using SUBARU select monitor. CHECK BATTERY. Is the voltage more than 11 V? Go to step 3. Charge or replace 1) Turn the ignition switch to OFF.
  • Page 97 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK POWER SUPPLY CIRCUIT. Is the voltage more than 10 V? Go to step 11. Repair the open 1) Turn the ignition switch to ON (engine circuit in harness OFF).
  • Page 98 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) B: NO TROUBLE CODE DIAGNOSIS: ABS warning light circuit is shorted. TROUBLE SYMPTOM: • ABS warning light remains on. • NO TROUBLE CODE displayed on the select monitor. NOTE: When the ABS warning light is OFF and “NO TROUBLE CODE” is displayed on select monitor, the system is in normal condition.
  • Page 99 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: • LHD model BATTERY SBF-3 SBF-1 IGNITION SWITCH No.14 COMBINATION METER :TURBO MODEL DIAGNOSIS TERMINAL B301 ABSCM&H/U B301 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 100 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model BATTERY SBF-3 SBF-1 IGNITION SWITCH No.14 COMBINATION METER DIAGNOSIS TERMINAL ABSCM&H/U 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 10 11 12 13 14 15 19 20...
  • Page 101 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK WIRING HARNESS. Does the ABS warning light Go to step 2. Repair the front 1) Turn the ignition switch to OFF. turn on? wiring harness. 2) Disconnect the connector (B38) from con- nector (i3).
  • Page 102 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) C: DTC 21 OPEN OR SHORT CIRCUIT IN FRONT RIGHT ABS SENSOR CIRCUIT NOTE: For the diagnostic procedure, refer to DTC 27. <Ref. to ABS-102, DTC 27 OPEN OR SHORT CIRCUIT IN REAR LEFT ABS SENSOR CIRCUIT, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 103 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) F: DTC 27 OPEN OR SHORT CIRCUIT IN REAR LEFT ABS SENSOR CIRCUIT DIAGNOSIS: • Faulty ABS wheel speed sensor (Broken wire, input voltage too high) • Faulty harness connector TROUBLE SYMPTOM: ABS does not operate.
  • Page 104 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: • LHD model B301 ABSCM&H/U B321 F103 B321 F103 FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH F103 B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 105 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 5 6 7 8 9...
  • Page 106 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK OUTPUT OF ABS WHEEL SPEED Does the speed indicated on Go to step 2. Go to step 8. SENSOR USING SELECT MONITOR. display change in response to 1) Select “Current data display & Save” on the speedometer reading during select monitor.
  • Page 107 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABS WHEEL SPEED SENSOR. Is the resistance the following Go to step 9. Replace the ABS 1) Turn the ignition switch to OFF. value? wheel speed sen- 2) Disconnect the connector from ABS wheel Front: 1 —...
  • Page 108 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK BATTERY SHORT OF HARNESS. Is the voltage less than 1 V? Go to step 13. Repair the har- Measure the voltage between ABSCM&H/U ness between connector and chassis ground. ABSCM&H/U and Connector &...
  • Page 109 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABS WHEEL SPEED SENSOR GAP. Is the gap the following value? Go to step 16. Adjust the gap. Measure the tone wheel to ABS wheel speed Front wheel: NOTE: sensor piece gap over entire perimeter of the 0.3 —...
  • Page 110 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABSCM&H/U. Is the same DTC as in current Replace the Go to step 21. 1) Connect all connectors. diagnosis still being output? ABSCM only. 2) Erase the memory. 3) Perform the inspection mode.
  • Page 111 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) G: DTC 22 FRONT RIGHT ABNORMAL ABS SENSOR SIGNAL NOTE: For the diagnostic procedure, refer to DTC 28. <Ref. to ABS-111, DTC 28 REAR LEFT ABNORMAL ABS SENSOR SIGNAL, Diagnostics Procedure with Diagnostic Trouble Code (DTC).> H: DTC 24 FRONT LEFT ABNORMAL ABS SENSOR SIGNAL NOTE: For the diagnostic procedure, refer to DTC 28.
  • Page 112 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) J: DTC 28 REAR LEFT ABNORMAL ABS SENSOR SIGNAL DIAGNOSIS: • Faulty ABS wheel speed sensor signal (noise, irregular signal, etc.) • Faulty harness/connector TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: •...
  • Page 113 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 5 6 7 8 9...
  • Page 114 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK OUTPUT OF ABS WHEEL SPEED Does the speed indicated on Go to step 2. Go to step 8. SENSOR USING SELECT MONITOR. display change in response to 1) Select “Current data display & Save” on the speedometer reading during select monitor.
  • Page 115 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABS WHELL SPEED SENSOR GAP. Is the gap the following value? Go to step 10. Adjust the gap. Measure the tone wheel to ABS wheel speed Front wheel: NOTE: sensor piece gap over entire perimeter of 0.3 —...
  • Page 116 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK TONE WHEEL RUNOUT. Is the runout less than 0.05 Go to step 15. Replace the tone Measure the tone wheel runout. mm (0.0020 in)? wheel. Front: <Ref. to ABS-21, Front Tone Wheel.>...
  • Page 117 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK GROUND SHORT OF HARNESS. Is the resistance more than 1 Go to step 19. Repair the har- Measure the resistance between ABSCM&H/U MΩ? ness connector connector and chassis ground. between Connector &...
  • Page 118 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ANY OTHER DIAGNOSTIC TROU- Are other DTCs being output? Proceed with the A temporary noise BLE CODES (DTCs) APPEARANCE. diagnosis corre- interference. sponding to DTC. NOTE: Although the ABS warning light re- mains illuminating at this point, this is...
  • Page 119 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) K: DTC 29 ABNORMAL ABS SENSOR SIGNAL ON ANY ONE OF FOUR SEN- DIAGNOSIS: • Faulty ABS wheel speed sensor signal (noise, irregular signal, etc.) • Faulty tone wheel • Wheels turning freely for a long time TROUBLE SYMPTOM: •...
  • Page 120 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: • LHD model B301 ABSCM&H/U B321 F103 B321 F103 FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH F103 B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 121 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR FRONT FRONT REAR REAR WHEEL WHEEL WHEEL WHEEL SPEED SPEED SPEED SPEED SENSOR LH SENSOR RH SENSOR LH SENSOR RH 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 5 6 7 8 9...
  • Page 122 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK IF THE WHEELS HAVE TURNED Check if the wheels have been The ABS is nor- Go to step 2. FREELY FOR A LONG TIME. turned freely for more than one mal.
  • Page 123 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABS WHEEL SPEED SENSOR SIG- Is an oscilloscope pattern the Go to step 12. Go to step 9. NAL. same as shown in the figure? 1) Raise all four wheels off ground. <Ref.
  • Page 124 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ABSCM&H/U. Is the same DTC as in the cur- Replace the Go to step 13. 1) Turn the ignition switch to OFF. rent diagnosis still being out- ABSCM only. 2) Connect all connectors.
  • Page 125 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) L: DTC 31 FRONT RIGHT INLET VALVE MALFUNCTION NOTE: For the diagnostic procedure, refer to DTC 37. <Ref. to ABS-125, DTC 37 REAR LEFT INLET VALVE MAL- FUNCTION, Diagnostics Procedure with Diagnostic Trouble Code (DTC).> M: DTC 33 FRONT LEFT INLET VALVE MALFUNCTION NOTE: For the diagnostic procedure, refer to DTC 37.
  • Page 126 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) O: DTC 37 REAR LEFT INLET VALVE MALFUNCTION DIAGNOSIS: • Faulty harness connector • Faulty inlet solenoid valve TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate. NOTE: In addition to the ABS warning light, brake warning light illuminates.
  • Page 127 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH : LHD MODEL : RHD MODEL B301 ABSCM&H/U B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 27 28 29 30 31 ABS00229 ABS-126...
  • Page 128 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 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& between battery, H/U.
  • Page 129 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) P: DTC 32 FRONT RIGHT OUTLET VALVE MALFUNCTION NOTE: For the diagnostic procedure, refer to DTC 38. <Ref. to ABS-129, DTC 38 REAR LEFT OUTLET VALVE MALFUNCTION, Diagnostics Procedure with Diagnostic Trouble Code (DTC).> Q: DTC 34 FRONT LEFT OUTLET VALVE MALFUNCTION NOTE: For the diagnostic procedure, refer to DTC 38.
  • Page 130 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) S: DTC 38 REAR LEFT OUTLET VALVE MALFUNCTION DIAGNOSIS: • Faulty harness connector • Faulty outlet solenoid valve TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate. NOTE: In addition to the ABS warning light, brake warning light illuminates.
  • Page 131 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH : LHD MODEL : RHD MODEL B301 ABSCM&H/U B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 27 28 29 30 31 ABS00229 ABS-130...
  • Page 132 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 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& between battery, H/U.
  • Page 133 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) T: DTC 41 ABS CONTROL MODULE MALFUNCTION DIAGNOSIS: Faulty ABSCM&H/U TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate. NOTE: In addition to the ABS warning light, brake warning light illuminates. WIRING DIAGRAM: B301 ABSCM&H/U...
  • Page 134 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 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& ground harness.
  • Page 135 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) U: DTC 42 POWER SUPPLY VOLTAGE TOO LOW DIAGNOSIS: Power source voltage of the ABSCM&H/U is low. TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate. NOTE: In addition to the ABS warning light, brake warning light illuminates temporarily. Both warning lights go off on the recovery of voltage.
  • Page 136 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH : LHD MODEL : RHD MODEL B301 ABSCM&H/U B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 27 28 29 30 31 ABS00229 ABS-135...
  • Page 137 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK GENERATOR. Is the voltage 10 — 15 V? Go to step 2. Repair the genera- 1) Start the engine. tor. <Ref. to 2) Idle after warm-up. SC(H4SO)-15, 3) Measure the voltage between generator B Generator.>...
  • Page 138 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) V: DTC 42 POWER SUPPLY VOLTAGE TOO HIGH DIAGNOSIS: Power source voltage of the ABSCM&H/U is high. TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate. NOTE: In addition to the ABS warning light, brake warning light illuminates temporarily. Both warning lights go off on the recovery of voltage.
  • Page 139 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH : LHD MODEL : RHD MODEL B301 ABSCM&H/U B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 27 28 29 30 31 ABS00229 ABS-138...
  • Page 140 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK GENERATOR. Is the voltage 10 — 17 V? Go to step 2. Repair the genera- 1) Start the engine. tor. <Ref. to 2) Idle after warm-up. SC(H4SO)-15, 3) Measure the voltage between generator B Generator.>...
  • Page 141 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) W: DTC 44 ABS-AT CONTROL (NON CONTROLLED) DIAGNOSIS: Combination of AT control faults TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: B301 ABSCM&H/U : LHD MODEL : RHD MODEL : TURBO MODEL : NON-TURBO MODEL : TURBO MODEL : A12 NON-TURBO MODEL...
  • Page 142 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK SPECIFICATIONS OF THE AB- Does the vehicle specification Go to step 2. Replace the SCM&H/U. and ABSCM&H/U specifica- ABSCM&H/U. Check specifications of the mark on the tion match? <Ref.
  • Page 143 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) X: DTC 44 ABS-AT CONTROL (CONTROLLED) DIAGNOSIS: Combination of AT control faults TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: B301 ABSCM&H/U : LHD MODEL : RHD MODEL : TURBO MODEL : NON-TURBO MODEL : TURBO MODEL : A12 NON-TURBO MODEL...
  • Page 144 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK BATTERY SHORT OF HARNESS. Is the voltage less than 1 V? Go to step 2. Repair the har- 1) Turn the ignition switch to OFF. ness between 2) Disconnect all connectors from TCM. TCM and 3) Disconnect the connector from ABSCM&...
  • Page 145 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Y: DTC 51 VALVE RELAY MALFUNCTION DIAGNOSIS: Faulty valve relay TROUBLE SYMPTOM: • ABS does not operate. • EBD does not operate. NOTE: In addition to the ABS warning light, brake warning light illuminates. WIRING DIAGRAM: BATTERY SBF-3...
  • Page 146 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) 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& between battery H/U.
  • Page 147 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Z: DTC 51 VALVE RELAY ON FAILURE DIAGNOSIS: Faulty valve relay TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: BATTERY SBF-3 SBF-1 IGNITION SWITCH : LHD MODEL : RHD MODEL B301 ABSCM&H/U VALVE RELAY MOTOR RELAY...
  • Page 148 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK VALVE RELAY IN ABSCM&H/U. Is the resistance more than 1 Go to step 2. Replace the 1) Disconnect the connector from ABSCM& MΩ? ABSCM&H/U. H/U. <Ref. to ABS-7, 2) Measure the resistance between ABS Control Mod- ABSCM&H/U terminals.
  • Page 149 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AA:DTC 52 OPEN CIRCUIT IN MOTOR RELAY CIRCUIT DIAGNOSIS: • Faulty motor • Faulty motor relay • Faulty harness connector TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: BATTERY SBF-1 IGNITION SWITCH : LHD MODEL : RHD MODEL...
  • Page 150 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK INPUT VOLTAGE OF ABSCM&H/U. Is the voltage 10 — 13 V? Go to step 2. Repair the har- 1) Turn the ignition switch to OFF. ness/connector 2) Disconnect the connector from ABSCM& between battery H/U.
  • Page 151 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AB:DTC 52 MOTOR RELAY ON FAILURE DIAGNOSIS: • Faulty motor • Faulty motor relay • Faulty harness connector TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: BATTERY SBF-1 IGNITION SWITCH : LHD MODEL : RHD MODEL B255 B301...
  • Page 152 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK MOTOR RELAY IN ABSCM&H/U. Is the resistance more than 1 Go to step 2. Replace the 1) Disconnect the connector from ABSCM& MΩ? ABSCM&H/U. H/U. <Ref. to ABS-7, 2) Measure the resistance between ABS Control Mod- ABSCM&H/U terminals.
  • Page 153 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AC:DTC 52 MOTOR MALFUNCTION DIAGNOSIS: • Faulty motor • Faulty motor relay • Faulty harness connector TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: BATTERY SBF-1 IGNITION SWITCH : LHD MODEL : RHD MODEL B255 B301...
  • Page 154 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK INPUT VOLTAGE OF ABSCM&H/U. Is the voltage 10 — 13 V? Go to step 2. Repair the har- 1) Turn the ignition switch to OFF. ness/connector 2) Disconnect the connector from ABSCM& between battery H/U.
  • Page 155 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ANY OTHER DIAGNOSTIC TROU- Are other DTCs being output? Proceed with the A temporary poor BLE CODES (DTCs) APPEARANCE. diagnosis corre- contact. sponding to DTC. NOTE: Although the ABS warning light re- mains illuminating at this point, this is...
  • Page 156 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AD:DTC 54 STOP LIGHT SWITCH SIGNAL CIRCUIT MALFUNCTION DIAGNOSIS: Faulty stop light switch TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: BATTERY STOP LIGHT SWITCH WITHOUT CRUISE CONTROL WC : WITH CRUISE CONTROL : LHD MODEL B301...
  • Page 157 CHECK OUTPUT OF STOP LIGHT SWITCH Is the reading indicated on Go to step 2. Go to step 3. USING SUBARU SELECT MONITOR. monitor display less than 1.5 1) Select “Current data display & Save” on the SUBARU select monitor.
  • Page 158 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AE:DTC 56 OPEN OR SHORT CIRCUIT IN G SENSOR CIRCUIT DIAGNOSIS: Faulty G sensor output voltage TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: • LHD model B301 ABSCM&H/U F103 B292 G SENSOR B292 F103...
  • Page 159 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR B292 G SENSOR B292 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 1 2 3 16 17 18 19 20 21 22 10 11 12 13 14 15 16 17 18...
  • Page 160 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK OUTPUT OF G SENSOR USING SE- Is the G sensor output on mon- Go to step 2. Go to step 5. LECT MONITOR. itor display 2.1 — 2.5 V when 1) Select “Current data display &...
  • Page 161 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK G SENSOR. Is the voltage 3.7 — 4.1 V Go to step 10. Replace the G Measure the voltage between G sensor con- when G sensor is inclined for- sensor.
  • Page 162 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AF:DTC 56 BATTERY SHORT IN G SENSOR CIRCUIT DIAGNOSIS: Faulty G sensor output voltage TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: • LHD model B301 ABSCM&H/U F103 B292 G SENSOR B292 F103 B301...
  • Page 163 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR B292 G SENSOR B292 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 1 2 3 16 17 18 19 20 21 22 10 11 12 13 14 15 16 17 18...
  • Page 164 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK OUTPUT OF G SENSOR USING SE- Is the voltage 2.1 — 2.5 V Go to step 2. Go to step 5. LECT MONITOR. when G sensor is in horizontal 1) Select “Current data display &...
  • Page 165 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK BATTERY SHORT OF HARNESS. Is the voltage less than 1 V? Go to step 12. Repair the har- 1) Turn the ignition switch to OFF. ness between G 2) Remove the console box.
  • Page 166 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK G SENSOR. Is the voltage 2.1 — 2.5 V Go to step 19. Replace the G 1) Connect the connector to G sensor. when G sensor is in horizontal sensor.
  • Page 167 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AG:DTC 56 ABNORMAL G SENSOR HIGH µ OUTPUT DIAGNOSIS: Faulty G sensor output voltage TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: • LHD model B301 ABSCM&H/U F103 B292 G SENSOR B292 F103 B301...
  • Page 168 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR B292 G SENSOR B292 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 1 2 3 16 17 18 19 20 21 22 10 11 12 13 14 15 16 17 18...
  • Page 169 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK OUTPUT OF G SENSOR USING SE- Is the voltage 2.1 — 2.5 V Go to step 2. Go to step 5. LECT MONITOR. when G sensor is in horizontal 1) Select “Current data display &...
  • Page 170 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK G SENSOR. Is the voltage 3.7 — 4.1 V Go to step 9. Replace the G Measure the voltage between G sensor con- when G sensor is inclined for- sensor.
  • Page 171 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) AH:DTC 56 DETECTION OF G SENSOR STICK DIAGNOSIS: Faulty G sensor output voltage TROUBLE SYMPTOM: ABS does not operate. WIRING DIAGRAM: • LHD model B301 ABSCM&H/U F103 B292 G SENSOR B292 F103 B301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 172 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) • RHD model ABSCM&H/U SHIELD JOINT CONNECTOR B292 G SENSOR B292 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 1 2 3 4 1 2 3 16 17 18 19 20 21 22 10 11 12 13 14 15 16 17 18...
  • Page 173 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK ALL FOUR WHEELS FOR FREE Have the wheels been turned The ABS is nor- Go to step 2. TURNING. freely such as when vehicle is mal. Erase the lifted up, or operated on a roll- DTC.
  • Page 174 Diagnostics Procedure with Diagnostic Trouble Code (DTC) ABS (DIAGNOSTIC) Step Check CHECK G SENSOR. Is the voltage 3.7 — 4.1 V Go to step 11. Replace the G Measure the voltage between G sensor con- when G sensor is inclined for- sensor.

  • Page 175: General Diagnostics Table

    General Diagnostics Table ABS (DIAGNOSTIC) 14.General Diagnostics Table A: INSPECTION Symptom Probable faulty units/parts • ABSCM&H/U (solenoid valve) • ABS wheel speed sensor • Brake (caliper & piston, pads) Vehicle pulls to either side. • Wheel alignment • Tire specifications, tire wear and air pressures •...

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