Subaru LEGACY 2003 Service Manual
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Subaru LEGACY 2003 Service Manual

Subaru LEGACY 2003 Service Manual

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2003 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)
VDC
VDC (DIAGNOSTICS)
BRAKE
PARKING BRAKE
POWER ASSISTED SYSTEM
(POWER STEERING)
FS
RS
WT
DI
TC
DS
ABS
ABS
VDC
VDC
BR
PB
PS
G2300GE6

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  • Page 1 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. DRIVE SHAFT SYSTEM...

  • Page 3: Table Of Contents

    Subaru Select Monitor................16 Read Diagnostic Trouble Code (DTC) ............19 Inspection Mode..................21 Clear Memory Mode..................22 ABS Warning Light Illumination Pattern ............23 List of Diagnostics Trouble Code (DTC) ...........24 Diagnostics Chart with Diagnosis Connector ..........28 Diagnostics Chart with Subaru Select Monitor..........80 General Diagnostics Table..............149...

  • Page 4: Basic Diagnostic Procedure

    BASIC DIAGNOSTIC PROCEDURE ABS (DIAGNOSTICS) 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 harness for broken wires or short circuits, shake it while holding it or the connector.
  • Page 5 NOTE: • To check harness for broken wires or short circuits, shake it while holding it or the connector. • Check list for interview. <Ref. to ABS-25, WITH SUBARU SELECT MONITOR, LIST, List of Diagnostics Trouble Code (DTC).> Step Value CHECK PRE-INSPECTION.
  • Page 6 DISPLAY. 1) Turn ignition switch to OFF. 2) Connect the SUBARU SELECT MONITOR to data link connector. 3) Turn ignition switch to ON and SUBARU SELECT MONITOR to ON. NOTE: If the communication function of the select monitor cannot be executed normally, check the communication circuit.

  • Page 7: 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 ABS warning light Always comes on. Sometimes Only once Does not come on •...
  • Page 8 CHECK LIST FOR INTERVIEW ABS (DIAGNOSTICS) 2. SYMPTOMS ABS operating condi- Performs no work. tion Operates only when abruptly applying brakes. Vehicle speed : km/h • How to step on brake pedal : a) Operating time : b) Operating noise : Produce / Does not produce •...
  • Page 9 CHECK LIST FOR INTERVIEW ABS (DIAGNOSTICS) 3. CONDITIONS UNDER WHICH TROUBLE OCCURS Environment a) Weather Fine Cloudy Rainy Snowy Various/Others : °F (°C) b) Ambient temperature c) Road Urban area Suburbs Highway General road Ascending slope Descending slope Paved road Gravel road Muddy road Sandy place...

  • Page 10: General Description

    GENERAL DESCRIPTION ABS (DIAGNOSTICS) 3. General Description 6. TIRE Check tire specifications, tire wear and air pres- A: CAUTION sure. <Ref. to WT-2, SPECIFICATIONS, General 1. SUPPLEMENTAL RESTRAINT SYSTEM Description.> “AIRBAG” Airbag system wiring harness is routed near the ABS sensor, ABS control module and hydraulic control unit.
  • Page 11 GENERAL DESCRIPTION ABS (DIAGNOSTICS) C: PREPARATION TOOL 1. SPECIAL TOOLS ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 24082AA210 CARTRIDGE Troubleshooting for electrical systems. ST24082AA210 22771AA030 SELECT MONITOR Troubleshooting for electrical systems. • English: 22771AA030 (Without printer) • German: 22771AA070 (Without printer) • French: 22771AA080 (Without printer) •...

  • Page 12: Electrical Components Location

    ( 9 ) ( 8 ) ( 7 ) (12) ABS00281 (1) ABS control module and hydrau- (5) Data link connector (for Subaru (8) ABS sensor lic control unit (ABSCM&H/U) select monitor) (9) Wheel cylinder (2) Proportioning valve (6) Transmission control module (only...
  • Page 13 ELECTRICAL COMPONENTS LOCATION ABS (DIAGNOSTICS) ( 4 ) ( 1 ) ABS00302 ABS00305 (10) ( 8 ) ABS00303 ( 7 ) ABS00306 ( 3 ) ( 5 ) ABS00304 ABS00307 ABS-11...

  • Page 14: Control Module I/O Signal

    CONTROL MODULE I/O SIGNAL ABS (DIAGNOSTICS) 5. Control Module I/O Signal A: ELECTRICAL SPECIFICATION ( 1 ) ( 2 ) 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 ABS00288 (1) ABSCM&HU connector...
  • Page 15 CONTROL MODULE I/O SIGNAL ABS (DIAGNOSTICS) Input/Output signal Terminal No. Contents (+)—(−) Measured value and measuring conditions Front left wheel 9—10 Front right wheel 11—12 ABS sensor*2 0.12 — 1 V (Wheel speed sensor) (When it is 20 Hz.) Rear left wheel 7—8 Rear right wheel 14—15...
  • Page 16 CONTROL MODULE I/O SIGNAL ABS (DIAGNOSTICS) B: SCHEMATIC ( 1 ) (14) (15) (25) (16) ( 3 ) (26) ( 4 ) (17) ( 2 ) (18) ( 5 ) (19) ( 6 ) ( 7 ) ( 8 ) (20) ( 9 ) (10)
  • Page 17 CONTROL MODULE I/O SIGNAL ABS (DIAGNOSTICS) C: WAVEFORM ABS sensor Terminal No. 9 – 10 Standard output 11 – 12 voltage at 20 Hz: 7 – 8 0.12 – 1 V 14 – 15 20 Hz ABS00110 ABS-15...

  • Page 18: Subaru Select Monitor

    SUBARU SELECT MONITOR OPERATION MAN- UAL. ABS00112 • For detailed concerning diagnostic trouble 4) Connect Subaru Select Monitor to data link con- codes, refer to the LIST OF DIAGNOSTICS TROU- nector. BLE CODE. <Ref. to ABS-24, List of Diagnostics (1) Data link connector located in the lower por- Trouble Code (DTC).>...
  • Page 19 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 4. ABS SEQUENCE CONROL 1) On the «Main Menu» display screen, select the Display {2.
  • Page 20 SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 5. FREEZE FRAME DATA NOTE: • Data stored at the time of trouble occurrence is shown on display. • Each time trouble occurs, the latest information is stored in the freeze frame data in memory.

  • Page 21: Read Diagnostic Trouble Code (Dtc)

    4) Turn ignition switch ON. A: OPERATION 5) ABS warning light is set in the diagnostic mode 1. WITHOUT SUBARU SELECT MONITOR and blinks to identify diagnostic trouble code (DTC). 1) Take out diagnosis connector from side of driv- er's seat heater unit.
  • Page 22 READ DIAGNOSTIC TROUBLE CODE (DTC) ABS (DIAGNOSTICS) 2. WITH SUBARU SELECT MONITOR Refer to SUBARU SELECT MONITOR for information about how to obtain and understand diagnostic trouble codes (DTC). <Ref. to ABS-16, Subaru Select Monitor.> ABS-20...

  • Page 23: Inspection Mode

    INSPECTION MODE ABS (DIAGNOSTICS) 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 one minute. ABS-21...

  • Page 24: Clear Memory Mode

    After 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 diagnostic trouble codes (DTC). <Ref. to ABS-16, Subaru Select Monitor.> ABS-22...

  • Page 25: Abs Warning Light Illumination Pattern

    ABS WARNING LIGHT ILLUMINATION PATTERN ABS (DIAGNOSTICS) 10.ABS Warning Light Illumination Pattern A: INSPECTION START Ignition key switch Illuminates. Goes out. Goes out. ABS warning light 1.5 s ABS00118 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 (DIAGNOSTICS) 11.List of Diagnostics Trouble Code (DTC) A: LIST 1. WITHOUT SUBARU SELECT MONITOR Index No. DTC No. Contents of diagnosis Start code • DTC is shown after start code. — • Only start code is shown in normal condition.
  • Page 27 Subaru Select Monitor.> <Ref. to ABS-93, DTC 22 FRONT RIGHT ABNORMAL ABS Front right ABS sensor Front right ABS sensor SENSOR SIGNAL, Diagnostics Chart with Subaru Select Moni- abnormal signal abnormal signal tor.> Open or short circuit in Open or short circuit in <Ref.
  • Page 28 Select Monitor.> <Ref. to ABS-134, DTC 56 OPEN OR SHORT CIRCUIT IN G Open or short circuit in Open or short circuit in SENSOR CIRCUIT, Diagnostics Chart with Subaru Select Mon- G sensor circuit G sensor circuit itor.> Battery short in G sen- Battery short in G sen- <Ref.

  • Page 29: List Of Diagnostics Trouble Code (Dtc)

    LIST OF DIAGNOSTICS TROUBLE CODE (DTC) ABS (DIAGNOSTICS) MEMO: ABS-27...

  • Page 30: Diagnostics Chart With Diagnosis Connector

    DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) 12.Diagnostics Chart with Diagnosis Connector A: ABS WARNING LIGHT DOES NOT COME ON. DIAGNOSIS: • ABS warning light circuit is open or shorted. TROUBLE SYMPTOM: • When ignition switch is turned ON (engine OFF), ABS warning light does not come on WIRING DIAGRAM: BATTERY SBF-3 50A...
  • Page 31 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK IF OTHER WARNING LIGHTS TURN Other warning light turns on. Go to step 2. Repair combina- tion meter. -<Ref. Turn ignition switch to ON (engine OFF). to IDI-14, Combi- Do other warning lights turn on? nation Meter Assembly.>...
  • Page 32 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK BATTERY SHORT OF ABS WARN- Go to step 7. Repair wiring har- ING LIGHT HARNESS. ness. 1) Turn ignition switch to OFF. 2) Measure voltage between connector (F45) or (F2) and chassis ground. Connector &...
  • Page 33 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) MEMO: ABS-31...
  • Page 34 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) 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: BATTERY SBF-3 50A...

  • Page 35: Power

    DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK INSTALLATION OF ABSCM&H/U Connector is locked securely. Go to step 2. Insert ABSCM&H/ CONNECTOR. U connector into Turn ignition switch to OFF. ABSCM&H/U until Is ABSCM&H/U connector inserted into the clamp locks ABSCM until the clamp locks onto it? onto it.
  • Page 36 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK ABSCM&H/U TERMINAL. There is no damage on termi- Go to step 9. Replace 1) Turn ignition switch to OFF. nal. ABSCM&H/U. 2) Check for damage at the ABSCM&H/U ter- <Ref. to ABS-6, minal.
  • Page 37 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) MEMO: ABS-35...
  • Page 38 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) C: DIAGNOSTIC TROUBLE CODE (DTC) 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 the diagnostic mode. WIRING DIAGRAM: BATTERY SBF-3 50A...
  • Page 39 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value 0.5 Ω CHECK DIAGNOSIS TERMINAL. Go to step 2. Repair diagnosis 1) Turn ignition switch to OFF. terminal harness. 2) Measure resistance between diagnosis ter- minals (B81) and chassis ground. Terminals Diagnosis terminal (A) —...
  • Page 40 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) D: 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-40, DTC 27 ABNORMAL ABS SENSOR (OPEN CIRCUIT OR INPUT VOLTAGE TOO HIGH) (REAR LH), Diagnostics Chart with Diagnosis Connector.>...
  • Page 41 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) MEMO: ABS-39...
  • Page 42 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) G: DTC 27 ABNORMAL ABS SENSOR (OPEN CIRCUIT OR INPUT VOLTAGE TOO HIGH) (REAR LH) DIAGNOSIS: • Faulty ABS sensor (Broken wire, input voltage too high) • Faulty harness connector TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT : LHD...
  • Page 43 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK ABS SENSOR. 1 - 1.5 kΩ Go to step 2. Replace ABS sen- 1) Turn ignition switch to OFF. sor. Front: <Ref. 2) Disconnect connector from ABS sensor. to ABS-12, Front 3) Measure resistance of ABS sensor connec- ABS Sensor.>...
  • Page 44 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK BATTERY SHORT OF HARNESS. Go to step 6. Repair harness Measure voltage between ABSCM&H/U con- between nector and chassis ground. ABSCM&H/U and Connector & terminal ABS sensor. DTC 21 / (F49) No. 11 (+) — Chassis ground ( −...
  • Page 45 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK GROUND SHORT OF ABS SENSOR. 1 MΩ Go to step 11. Replace ABS sen- 1) Turn ignition switch to ON. sor and 2) Measure resistance between ABS sensor ABSCM&H/U. and chassis ground. Front: <Ref.
  • Page 46 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) H: DTC 22 ABNORMAL ABS SENSOR (FRONT RH) NOTE: For the diagnostic procedure, refer to DTC 28. <Ref. to ABS-46, DTC 28 ABNORMAL ABS SENSOR (REAR LH), Diagnostics Chart with Diagnosis Connector.> I: DTC 24 ABNORMAL ABS SENSOR (FRONT LH) NOTE: For the diagnostic procedure, refer to DTC 28.
  • Page 47 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) MEMO: ABS-45...
  • Page 48 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) K: DTC 28 ABNORMAL ABS SENSOR (REAR LH) DIAGNOSIS: • Faulty ABS sensor signal (noise, irregular signal, etc.) • Faulty harness/connector TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT : LHD : LHD RHD B100...
  • Page 49 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK INSTALLATION OF ABS SENSOR. 33±10 N·m (3.4±1.0 kgf-m, Go to step 2. Tighten ABS sen- Turn ignition switch to OFF. 25±7 ft-lb) sor installation Are the ABS sensor installation bolts tightened bolts securely.
  • Page 50 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK TONE WHEEL RUNOUT. 0.05 mm (0.0020 in) Go to step 8. Replace tone Measure tone wheel runout. wheel. Front: Is the measured value less than the specified <Ref. to ABS-19, value? Front Tone Wheel.>...
  • Page 51 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value 0.5 Ω CHECK GROUND CIRCUIT OF ABSCM&H/U. Go to step 13. Repair Measure resistance between ABSCM&H/U ABSCM&H/U and chassis ground. ground harness. Connector & terminal (F49) No. 23 — GND: Is the measured value less than the specified value? CHECK POOR CONTACT IN CONNECTORS.
  • Page 52 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) L: DTC 29 ABNORMAL ABS SENSOR SIGNAL (ANY ONE OF FOUR) DIAGNOSIS: • Faulty ABS sensor signal (noise, irregular signal, etc.) • Faulty tone wheel • Turning wheels freely for a long time TROUBLE SYMPTOM: •...
  • Page 53 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK IF THE WHEELS HAVE TURNED Wheels have not turned freely. Go to step 2. NOTE: When the wheels FREELY. turn freely for a Check if the wheels have been turned freely for long time, such as more than one minute, such as when the vehi- when the vehicle is...
  • Page 54 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK ABS SENSOR SIGNAL. Oscilloscope pattern is as Go to step 12. Go to step 9. 1) Lift up the vehicle. shown in figure. 2) Turn ignition switch OFF. 3) Connect the oscilloscope to the connector. 4) Turn ignition switch ON.
  • Page 55 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK ANY OTHER DTC APPEARANCE. Other DTC is not indicated. A temporary poor Proceed with the Are other DTC being output? contact. diagnosis corre- sponding to the DTC. ABS-53...
  • Page 56 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) M: 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-56, DTC 37 ABNORMAL INLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/U (REAR LH), Diagnostics Chart with Diagnosis Connector.> N: DTC 33 ABNORMAL INLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/U (FRONT LH) NOTE:...
  • Page 57 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) MEMO: ABS-55...
  • Page 58 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) P: 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. WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH...
  • Page 59 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK INPUT VOLTAGE OF ABSCM&H/U. 10 - 15 V Go to step 2. Repair harness 1) Disconnect connector from ABSCM&H/U. connector 2) Run the engine at idle. between battery, 3) Measure voltage between ABSCM&H/U ignition switch and connector and chassis ground.
  • Page 60 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Q: 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-60, DTC 38 ABNORMAL OUTLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/U (REAR LH), Diagnostics Chart with Diagnosis Connector.> R: DTC 34 ABNORMAL OUTLET SOLENOID VALVE CIRCUIT(S) IN ABSCM&H/ U (FRONT LH) NOTE:...
  • Page 61 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) MEMO: ABS-59...
  • Page 62 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) T: 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. WIRING DIAGRAM: BATTERY GENERATOR IGNITION...
  • Page 63 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK INPUT VOLTAGE OF ABSCM&H/U. 10 - 15 V Go to step 2. Repair harness 1) Disconnect connector from ABSCM&H/U. connector 2) Run the engine at idle. between battery, 3) Measure voltage between ABSCM&H/U ignition switch and connector and chassis ground.

  • Page 64: Abnormal Abs Control Module

    DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) U: DTC 41 ABNORMAL ABS CONTROL MODULE DIAGNOSIS: • Faulty ABSCM&H/U. TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT 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 ABS00295...
  • Page 65 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK POOR CONTACT IN CONNECTORS. There is no poor contact. Go to step 3. Repair connector. Is there poor contact in connectors between battery, ignition switch and ABSCM&H/U? CHECK SOURCES OF SIGNAL NOISE. Installed properly Go to step 4.

  • Page 66: Source Voltage Is Abnormal

    DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) V: 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. WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT 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...
  • Page 67 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK GENERATOR. 10 - 17 V Go to step 2. Repair generator. 1) Start engine. H4 engine model: 2) Idling after warm-up. <Ref. to SC-<Ref. 3) Measure voltage between generator B ter- to SC(H4SO)-14, minal and chassis ground.

  • Page 68: A Combination Of At Control Abnormal

    DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) W: DTC 44 A COMBINATION OF AT CONTROL ABNORMAL DIAGNOSIS: • Combination of AT control faults TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT :RHD :LHD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3...
  • Page 69 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK SPECIFICATIONS OF THE AB- Both are the same specifica- Go to step 2. Replace SCM&H/U. tions. ABSCM&H/U. Check specifications of the mark to the <Ref. to ABS-6, ABSCM&H/U. ABS Control Mod- CG: AT (Except OUTBACK) ule and Hydraulic CH: MT (Except OUTBACK)
  • Page 70 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK ABSCM&H/U. Same DTC is not indicated. Go to step 10. Replace 1) Turn ignition switch to OFF. ABSCM&H/U. 2) Connect all connectors. <Ref. to ABS-6, 3) Erase the memory. ABS Control Mod- 4) Perform inspection mode.
  • Page 71 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) MEMO: ABS-69...

  • Page 72: Abnormal Valve Relay

    DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) X: DTC 51 ABNORMAL VALVE RELAY DIAGNOSIS: • Faulty valve relay TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: BATTERY SBF-3 50A SBF-1 100A IGNITION SWITCH ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT VALVE RELAY MOTOR RELAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 73 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK INPUT VOLTAGE OF ABSCM&H/U. 10 - 15 V Go to step 2. Repair harness 1) Turn ignition switch to OFF. connector 2) Disconnect connector from ABSCM&H/U. between battery 3) Run the engine at idle. and ABSCM&H/U.

  • Page 74: Abnormal Motor And/Or Motor Relay

    DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Y: 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 100A IGNITION SWITCH ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 75 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK INPUT VOLTAGE OF ABSCM&H/U. 10 - 15 V Go to step 2. Repair harness/ 1) Turn ignition switch to OFF. connector 2) Disconnect connector from ABSCM&H/U. between battery 3) Turn ignition switch to ON. and ABSCM&H/U 4) Measure voltage between ABSCM&H/U and check fuse...

  • Page 76: Abnormal Stop Light Switch

    DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Z: 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 : WITH CRUISE CONTROL ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 77 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK STOP LIGHTS COME ON. Stop lights come on. Go to step 2. Repair stop lights Depress the brake pedal. circuit. Do stop lights come on? CHECK OPEN CIRCUIT IN HARNESS. 10 - 15 V Go to step 3.

  • Page 78: Abnormal G Sensor Output Voltage

    DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) AA:DTC 56 ABNORMAL G SENSOR OUTPUT VOLTAGE DIAGNOSIS: • Faulty G sensor output voltage TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT G SENSOR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 4 5 6 7 8 27 28 29 30 31...
  • Page 79 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK WHEELS FOR FREE TURNING. Wheels have not turned freely. Go to step 2. The ABS is nor- Have the wheels been turned freely such as mal. Erase the when the vehicle is lifted up, or operated on a DTC.
  • Page 80 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK BATTERY SHORT OF HARNESS. Go to step 8. Repair harness 1) Turn ignition switch to ON. between G sensor 2) Measure voltage between ABSCM&H/U and ABSCM&H/U. connector and chassis ground. Connector &...
  • Page 81 DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR ABS (DIAGNOSTICS) Step Value CHECK ANY OTHER DTC APPEARANCE. Other DTC is not indicated. A temporary poor Proceed with the Are other DTC being output? contact. diagnosis corre- sponding to the DTC. ABS-79...

  • Page 82: Diagnostics Chart With Subaru Select Monitor

    DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 13.Diagnostics Chart with Subaru Select Monitor A: COMMUNICATION FOR INITIALIZING IMPOSSIBLE DIAGNOSIS: • Faulty harness connector TROUBLE SYMPTOM: • ABS warning light remains on. WIRING DIAGRAM: BATTERY GENERATOR B100 IGNITION SWITCH DATA LINK...
  • Page 83 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK IGNITION SWITCH. Ignition switch is to ON. Go to step 2. Turn ignition Is ignition switch to ON? switch to ON, and select ABS mode using the select monitor.
  • Page 84 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value 0.5 Ω CHECK HARNESS/CONNECTOR BETWEEN Repair harness Go to step 9. ABSCM&H/U AND DATA LINK CONNEC- and connector TOR. between Measure resistance between ABSCM&H/U ABSCM&H/U and connector and data link connector.
  • Page 85 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 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 the select monitor, the sys- tem is in normal condition.
  • Page 86 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) WIRING DIAGRAM: BATTERY SBF-3 50A SBF-1 100A IGNITION : TURBO IGNITION RELAY ENGINE SWITCH MODEL :TURBO A8 : TURBO B2 : LHD COMBINATION B100 GENERATOR METER WARNING : LHD LIGHT DIAGNOSIS DIAGNOSIS...
  • Page 87 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK PROJECTION AT ABSCM&H/U. There is no damage on termi- Go to step 3. Replace 1) Turn ignition switch to OFF. nal. ABSCM&H/U. 2) Disconnect connector from ABSCM&H/U. <Ref. to ABS-6,...

  • Page 88: Open Or Short Circuit In Front Right Abs Sensor

    For the diagnostic procedure, refer to DTC 27. <Ref. to ABS-88, DTC 27 OPEN OR SHORT CIRCUIT IN REAR LEFT ABS SENSOR CIRCUIT, Diagnostics Chart with Subaru Select Monitor.> D: DTC 23 OPEN OR SHORT CIRCUIT IN FRONT LEFT ABS SENSOR CIRCUIT NOTE: For the diagnostic procedure, refer to DTC 27.
  • Page 89 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) MEMO: ABS-87...
  • Page 90 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) F: DTC 27 OPEN OR SHORT CIRCUIT IN REAR LEFT ABS SENSOR CIRCUIT DIAGNOSIS: • Faulty ABS sensor (Broken wire, input voltage too high) • Faulty harness connector TROUBLE SYMPTOM: • ABS does not operate.
  • Page 91 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK OUTPUT OF ABS SENSOR USING Change as same. Go to step 2. Go to step 8. SELECT MONITOR. 1) Select “Current data display & Save” on the select monitor.
  • Page 92 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK ABS SENSOR. 1 - 1.5 kΩ Go to step 9. Replace ABS sen- 1) Turn ignition switch to OFF. sor. Front: <Ref. 2) Disconnect connector from ABS sensor. to ABS-12, Front 3) Measure resistance of ABS sensor connec- ABS Sensor.>...
  • Page 93 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK BATTERY SHORT OF HARNESS. Go to step 13. Repair harness Measure voltage between ABSCM&H/U con- between nector and chassis ground. ABSCM&H/U and Connector & terminal ABS sensor. DTC 21 / (F49) No. 11 (+) — Chassis ground ( −...
  • Page 94 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK GROUND SHORT OF ABS SENSOR. 1 MΩ Go to step 18. Replace ABS sen- 1) Turn ignition switch to ON. sor and 2) Measure resistance between ABS sensor ABSCM&H/U.
  • Page 95 G: DTC 22 FRONT RIGHT ABNORMAL ABS SENSOR SIGNAL NOTE: For the diagnostic procedure, refer to DTC 28. <Ref. to ABS-94, DTC 28 REAR LEFT ABNORMAL ABS SENSOR SIGNAL, Diagnostics Chart with Subaru Select Monitor.> H: DTC 24 FRONT LEFT ABNORMAL ABS SENSOR SIGNAL NOTE: For the diagnostic procedure, refer to DTC 28.
  • Page 96 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) J: DTC 28 REAR LEFT ABNORMAL ABS SENSOR SIGNAL DIAGNOSIS: • Faulty ABS sensor signal (noise, irregular signal, etc.) • Faulty harness/connector TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 97 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK OUTPUT OF ABS SENSOR USING Change as same. Go to step 2. Go to step 8. SELECT MONITOR. 1) Select “Current data display & Save” on the select monitor.
  • Page 98 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK ABS SENSOR GAP. Front wheel 0.3 — 0.8 mm Go to step 10. Adjust the gap. Measure tone wheel to ABS sensor piece gap (0.012 — 0.031 in) and Rear NOTE: over entire perimeter of the wheel.
  • Page 99 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK TONE WHEEL RUNOUT. 0.05 mm (0.0020 in) Go to step 15. Replace tone Measure tone wheel runout. wheel. Front: Is the measured value less than the specified <Ref. to ABS-19,...
  • Page 100 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value 0.5 Ω CHECK GROUND CIRCUIT OF ABSCM&H/U. Go to step 20. Repair Measure resistance between ABSCM&H/U ABSCM&H/U and chassis ground. ground harness. Connector & terminal (F49) No. 23 — GND:...
  • Page 101 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) MEMO: ABS-99...

  • Page 102: Abnormal Abs Sensor Signal On Any One Of

    DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) K: DTC 29 ABNORMAL ABS SENSOR SIGNAL ON ANY ONE OF FOUR SEN- DIAGNOSIS: • Faulty ABS sensor signal (noise, irregular signal, etc.) • Faulty tone wheel • Wheels turning freely for a long time TROUBLE SYMPTOM: •...
  • Page 103 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK WHEELS FOR FREE TURNING. Wheels have not turned freely. Go to step 2. The ABS is nor- Have wheels been turned freely for more than mal. Erase the one minute, such as when the vehicle is...
  • Page 104 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK ABS SENSOR SIGNAL. Oscilloscope pattern is as Go to step 12. Go to step 9. 1) Lift up the vehicle. shown in figure. 2) Turn ignition switch to OFF.
  • Page 105 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK ANY OTHER DTC APPEARANCE. Other DTC is not indicated. A temporary poor Proceed with the Are other DTC being output? contact. diagnosis corre- sponding to the DTC. ABS-103...

  • Page 106: Front Right Inlet Valve Malfunction

    L: DTC 31 FRONT RIGHT INLET VALVE MALFUNCTION NOTE: For the diagnostic procedure, refer to DTC 37. <Ref. to ABS-106, DTC 37 REAR LEFT INLET VALVE MAL- FUNCTION, Diagnostics Chart with Subaru Select Monitor.> M: DTC 33 FRONT LEFT INLET VALVE MALFUNCTION NOTE: For the diagnostic procedure, refer to DTC 37.
  • Page 107 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) MEMO: ABS-105...
  • Page 108 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) O: DTC 37 REAR LEFT INLET VALVE MALFUNCTION DIAGNOSIS: • Faulty harness/connector • Faulty inlet solenoid valve TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 109 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK INPUT VOLTAGE OF ABSCM&H/U. 10 - 15 V Go to step 2. Repair harness 1) Turn ignition switch to OFF. connector 2) Disconnect connector from ABSCM&H/U. between battery, 3) Run the engine at idle.
  • Page 110 P: DTC 32 FRONT RIGHT OUTLET VALVE MALFUNCTION NOTE: For the diagnostic procedure, refer to DTC 38. <Ref. to ABS-110, DTC 38 REAR LEFT OUTLET VALVE MALFUNCTION, Diagnostics Chart with Subaru Select Monitor.> Q: DTC 34 FRONT LEFT OUTLET VALVE MALFUNCTION NOTE: For the diagnostic procedure, refer to DTC 38.
  • Page 111 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) MEMO: ABS-109...
  • Page 112 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) S: DTC 38 REAR LEFT OUTLET VALVE MALFUNCTION DIAGNOSIS: • Faulty harness/connector • Faulty outlet solenoid valve TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 113 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK INPUT VOLTAGE OF ABSCM&H/U. 10 - 15 V Go to step 2. Repair harness 1) Turn ignition switch to OFF. connector 2) Disconnect connector from ABSCM&H/U. between battery, 3) Run the engine at idle.
  • Page 114 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) T: DTC 41 ABS CONTROL MODULE MALFUNCTION DIAGNOSIS: • Faulty ABSCM&H/U TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 115 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK POOR CONTACT IN CONNECTORS. There is no poor contact. Go to step 3. Repair connector. Is there poor contact in connectors between battery, ignition switch and ABSCM&H/U? CHECK SOURCES OF SIGNAL NOISE.
  • Page 116 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 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. WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 117 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK GENERATOR. 10 - 15 V Go to step 2. i) Repair genera- 1) Start engine. tor. 2) Idling after warm-up. ii) H4 engine 3) Measure voltage between generator B ter- model: minal and chassis ground.
  • Page 118 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 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. WIRING DIAGRAM: BATTERY GENERATOR IGNITION SWITCH ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 119 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK GENERATOR. 10 - 17 V Go to step 2. i) Repair genera- 1) Start engine. tor. 2) Idling after warm-up. ii) H4 engine 3) Measure voltage between generator B ter- model: minal and chassis ground.
  • Page 120 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) W: DTC 44 ABS-AT CONTROL (NON CONTROLLED) DIAGNOSIS: • Combination of AT control faults TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT :RHD :LHD...
  • Page 121 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK SPECIFICATIONS OF THE AB- Both are the same specifica- Go to step 2. Replace SCM&H/U. tions. ABSCM&H/U. Check specifications of the mark to the <Ref. to ABS-6, ABSCM&H/U. ABS Control Mod-...
  • Page 122 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) X: DTC 44 ABS-AT CONTROL (CONTROLLED) DIAGNOSIS: • Combination of AT control faults TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT :RHD :LHD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...
  • Page 123 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK BATTERY SHORT OF HARNESS. Go to step 2. Repair harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect two connectors from TCM. ABSCM&H/U. 3) Disconnect connector from ABSCM&H/U.
  • Page 124 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Y: DTC 51 VALVE RELAY MALFUNCTION DIAGNOSIS: • Faulty valve relay TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: BATTERY SBF-3 50A SBF-1 100A IGNITION SWITCH ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 125 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK INPUT VOLTAGE OF ABSCM&H/U. 10 - 15 V Go to step 2. Repair harness 1) Turn ignition switch to OFF. connector 2) Disconnect connector from ABSCM&H/U. between battery 3) Run the engine at idle.
  • Page 126 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Z: DTC 51 VALVE RELAY ON FAILURE DIAGNOSIS: • Faulty valve relay TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: BATTERY SBF-3 50A SBF-1 100A IGNITION SWITCH ABS CONTROL MODULE AND...
  • Page 127 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK VALVE RELAY IN ABSCM&H/U. 1 MΩ Go to step 2. Replace Measure resistance between ABSCM&H/U ter- ABSCM&H/U. minals. <Ref. to ABS-6, Terminals ABS Control Mod- No. 23 — No. 24:...
  • Page 128 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 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 100A...
  • Page 129 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK INPUT VOLTAGE OF ABSCM&H/U. 10 - 15 V Go to step 2. Repair harness/ 1) Turn ignition switch to OFF. connector 2) Disconnect connector from ABSCM&H/U. between battery 3) Turn ignition switch to ON.
  • Page 130 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 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 100A IGNITION SWITCH...
  • Page 131 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK MOTOR RELAY IN ABSCM&H/U. 1 MΩ Go to step 2. Replace Measure resistance between ABSCM&H/U ter- ABSCM&H/U. minals. <Ref. to ABS-6, Terminals ABS Control Mod- No. 25 — No. 26:...
  • Page 132 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 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 100A IGNITION SWITCH ABS CONTROL MODULE AND...
  • Page 133 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK INPUT VOLTAGE OF ABSCM&H/U. 10 - 15 V Go to step 2. Repair harness/ 1) Turn ignition switch to OFF. connector 2) Disconnect connector from ABSCM&H/U. between battery 3) Turn ignition switch to ON.
  • Page 134 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 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 : WITH CRUISE...
  • Page 135 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK OUTPUT OF STOP LIGHT SWITCH 1.5 V Go to step 2. Go to step 3. USING SELECT MONITOR. 1) Select “Current data display & Save” on the select monitor.
  • Page 136 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) 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: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 137 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK OUTPUT OF G SENSOR USING SE- 2.1 - 2.5 V Go to step 2. Go to step 5. LECT MONITOR. 1) Select “Current data display & Save” on the select monitor.
  • Page 138 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK G SENSOR. 2.1 - 2.5 V Go to step 9. Replace G sen- 1) Connect connector to G sensor. sor. <Ref. to ABS- 2) Connect connector to ABSCM&H/U. 21, G Sensor.>...
  • Page 139 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) MEMO: ABS-137...
  • Page 140 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) AF:DTC 56 BATTERY SHORT IN G SENSOR CIRCUIT DIAGNOSIS: • Faulty G sensor output voltage TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT G SENSOR...

  • Page 141: Rear Right Wheel

    DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK OUTPUT OF G SENSOR USING SE- 2.1 - 2.5 V Go to step 2. Go to step 5. LECT MONITOR. 1) Select “Current data display & Save” on the select monitor.
  • Page 142 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK OPEN CIRCUIT IN G SENSOR OUT- 5.0 - 5.6 kΩ Go to step 11. Repair harness/ PUT HARNESS AND GROUND HARNESS. connector 1) Turn ignition switch to OFF. between G sensor 2) Disconnect connector from ABSCM&H/U.
  • Page 143 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK OPEN CIRCUIT IN G SENSOR OUT- 5.0 - 5.6 kΩ Go to step 18. Repair harness/ PUT HARNESS AND GROUND HARNESS. connector 1) Turn ignition switch to OFF. between G sensor 2) Disconnect connector from ABSCM&H/U.
  • Page 144 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) AG:DTC 56 ABNORMAL G SENSOR HIGH Μ Μ Μ Μ OUTPUT DIAGNOSIS: • Faulty G sensor output voltage TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT...
  • Page 145 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK OUTPUT OF G SENSOR USING SE- 2.1 - 2.5 V Go to step 2. Go to step 6. LECT MONITOR. 1) Select “Current data display & Save” on the select monitor.
  • Page 146 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK G SENSOR. 3.7 - 4.1 V Go to step 9. Replace G sen- Measure voltage between G sensor connector sor. <Ref. to ABS- terminals. 21, G Sensor.> Connector & terminal (R70) No.
  • Page 147 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) MEMO: ABS-145...
  • Page 148 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) AH:DTC 56 DETECTION OF G SENSOR STICK DIAGNOSIS: • Faulty G sensor output voltage TROUBLE SYMPTOM: • ABS does not operate. WIRING DIAGRAM: ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT G SENSOR...
  • Page 149 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK WHEELS FOR FREE TURNING. Wheel have not turned freely. Go to step 2. The ABS is nor- Have the wheels been turned freely such as mal. Erase the when the vehicle is lifted up, or operated on a trouble code.
  • Page 150 DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR ABS (DIAGNOSTICS) Step Value CHECK G SENSOR. 2.1 - 2.5 V Go to step 10. Replace G sen- 1) Remove console box. sor. <Ref. to ABS- 2) Remove G sensor from vehicle. 21, G Sensor.>...

  • Page 151: General Diagnostics Table

    GENERAL DIAGNOSTICS TABLE ABS (DIAGNOSTICS) 14.General Diagnostics Table A: INSPECTION Symptom Probable faulty units/parts • ABSCM&H/U (solenoid valve) • ABS sensor • Brake (caliper & piston, pads) Vehicle pulls to either side. • Wheel alignment • Tire specifications, tire wear and air pressures •...
  • Page 152 GENERAL DIAGNOSTICS TABLE ABS (DIAGNOSTICS) MEMO: ABS-150...

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