Subaru 2003 LEGACY Service Manual
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Subaru 2003 LEGACY Service Manual

Subaru 2003 LEGACY Service Manual

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2003 LEGACY SERVICE MANUAL
TRANSMISSION 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
CONTROL SYSTEMS
AUTOMATIC TRANSMISSION
AUTOMATIC TRANSMISSION
(DIAGNOSTICS)
MANUAL TRANSMISSION AND
DIFFERENTIAL
CLUTCH SYSTEM
CS
AT
AT
MT
CL
G2300GE5

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  • Page 1 2003 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX TRANSMISSION SECTION CONTROL SYSTEMS AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION (DIAGNOSTICS) MANUAL TRANSMISSION AND DIFFERENTIAL This service manual has been prepared to provide SUBARU service personnel CLUTCH SYSTEM with the necessary information and data for the correct maintenance and repair of SUBARU vehicles.

  • Page 3: Table Of Contents

    Basic Diagnostic Procedure ................2 Check List for Interview................5 General Description ..................6 Electrical Components Location..............9 Transmission Control Module (TCM) I/O Signal ........14 Subaru Select Monitor................21 Read Diagnostic Trouble Code (DTC) ............24 Inspection Mode..................26 Clear Memory Mode..................27 POWER Indicator Light Display ..............28 List of Diagnostic Trouble Code (DTC) .............29...

  • Page 4: Basic Diagnostic Procedure

    Go to step 5. Calling up the DTC. NOTE: Without Subaru Select Monitor Record all DTCs. <Ref. to AT-24, WITHOUT SUBARU SELECT MONITOR, OPERATION, Read Diagnostic Trouble Code (DTC).> With Subaru Select Monitor <Ref. to AT-25, WITH SUBARU SELECT MONITOR, OPERATION, Read Diagnostic Trouble Code (DTC).>...
  • Page 5 2) Inspect using “Symptom Related Diagnos- tic”. <Ref. to AT-160, Symptom Related Diagnostic.> 3) Perform the clear memory mode. With Subaru Select Monitor <Ref. to AT-27, WITH SUBARU SELECT MONITOR, OPERATION, Clear Memory Mode.> Without Subaru Select Monitor <Ref. to AT-27, WITHOUT SUBARU SELECT MONITOR, OPERATION, Clear Memory Mode.>...
  • Page 6 Trouble Code (DTC)”. <Ref. to AT-29, List of Diagnostic Trouble Code (DTC).> 2) Repair trouble cause. 3) Perform the clear memory mode. With Subaru Select Monitor <Ref. to AT-27, WITH SUBARU SELECT MONITOR, OPERATION, Clear Memory Mode.> Without Subaru Select Monitor <Ref. to AT-27, WITHOUT SUBARU SELECT MONITOR, OPERATION, Clear Memory Mode.>...

  • Page 7: Check List For Interview

    CHECK LIST FOR INTERVIEW AUTOMATIC TRANSMISSION (DIAGNOSTICS) 2. Check List for Interview A: CHECK Check the following items when problem has occurred. NOTE: Use copies of this page for interviewing customers. Customer's name Data vehicle brought in Data of repair Trans.

  • Page 8: General Description

    GENERAL DESCRIPTION AUTOMATIC TRANSMISSION (DIAGNOSTICS) 3. General Description 3. ATF LEVEL Make sure that ATF level is in the specification. A: CAUTION <Ref. to AT-30, Automatic Transmission Fluid.> • Supplemental Restraint System “Airbag” Airbag system wiring harness is routed near the ( A ) transmission control module (TCM).
  • Page 9 GENERAL DESCRIPTION AUTOMATIC TRANSMISSION (DIAGNOSTICS) 5. OPERATION OF SHIFT SELECT LEVER 7. HOLD SWITCH Make sure there is no abnormal noise, dragging or Make sure that HOLD indicator light in combination contact pattern in each select lever range. meter comes ON, when turning hold switch to ON. WARNING: Stop the engine while checking operation of se- lect lever.
  • Page 10 GENERAL DESCRIPTION AUTOMATIC TRANSMISSION (DIAGNOSTICS) C: PREPARATION TOOL 1. SPECIAL TOOLS ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 24082AA210 CARTRIDGE Troubleshooting for electrical systems. (Newly adopted tool) ST24082AA210 22771AA030 SELECT MONITOR Troubleshooting for electrical systems. • English: 22771AA030 (Without printer) • German: 22771AA070 (Without printer) •...

  • Page 11: Electrical Components Location

    ELECTRICAL COMPONENTS LOCATION AUTOMATIC TRANSMISSION (DIAGNOSTICS) 4. Electrical Components Location A: LOCATION 1. CONTROL MODULE LHD MODEL ( 1 ) ( 8 ) ( 4 ) ( 7 ) ( 2 ) ( 3 ) AT-00762 RHD MODEL ( 5 ) ( 2 ) ( 8 ) ( 6 )
  • Page 12 ELECTRICAL COMPONENTS LOCATION AUTOMATIC TRANSMISSION (DIAGNOSTICS) ( 1 ) ( 2 ) AT-00764 AT-00323 ( 3 ) ( 4 ) AT-00765 AT-00766 ( 6 ) ( 5 ) AT-00767 AT-00768 ( 8 ) ( 7 ) AT-00769 AT-00770 AT-10...
  • Page 13 ELECTRICAL COMPONENTS LOCATION AUTOMATIC TRANSMISSION (DIAGNOSTICS) 2. SENSOR ( 1 ) ( 4 ) ( 8 ) ( 2 ) ( 7 ) ( 3 ) ( 5 ) ( 6 ) AT-00771 (1) Throttle position sensor (4) Inhibitor switch (7) Torque converter turbine speed (Except 3.0 L model) signal...
  • Page 14 ELECTRICAL COMPONENTS LOCATION AUTOMATIC TRANSMISSION (DIAGNOSTICS) ( 2 ) ( 1 ) AT-00631 AT-00635 ( 3 ) ( 3 ) ( 6 ) ( 5 ) AT-00632 AT-00636 ( 7 ) ( 4 ) AT-00633 AT-00637 ( 8 ) AT-00634 AT-12...
  • Page 15 ELECTRICAL COMPONENTS LOCATION AUTOMATIC TRANSMISSION (DIAGNOSTICS) 3. SOLENOID ( 6 ) ( 7 ) ( 9 ) ( 5 ) ( 4 ) ( 3 ) ( 2 ) ( 1 ) ( 8 ) AT-00639 (1) Solenoid 1 (4) Low clutch timing solenoid (7) 2-4 brake timing solenoid (2) Solenoid 2 (5) Lock-up duty solenoid...

  • Page 16: Transmission Control Module (Tcm) I/O Signal

    TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL AUTOMATIC TRANSMISSION (DIAGNOSTICS) 5. Transmission Control Module (TCM) I/O Signal A: ELECTRICAL SPECIFICATION to B54 to B55 to B56 AT-00642 Check with ignition switch ON. Connector Terminal Resistance to Content Measuring conditions Voltage (V) body (ohms) Back-up power supply Ignition switch OFF...

  • Page 17: Non-Turbo Model

    TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL AUTOMATIC TRANSMISSION (DIAGNOSTICS) Check with ignition switch ON. Connector Terminal Resistance to Content Measuring conditions Voltage (V) body (ohms) Throttle fully opened. Less than 1 Kick-down switch — Throttle fully closed. More than 6.5 Light ON Less than 1 AT OIL TEMP warning light...
  • Page 18 Ignition switch ON — → More than 4 (Waveform) Data link signal — — — (Subaru Select Monitor) SPORT shift activated More than 8 SPORT shift solenoid 10 — 17 (with SPORT shift) SPORT shift deactivated Less than 1 SPORT shift mode switch ON...
  • Page 19 TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL AUTOMATIC TRANSMISSION (DIAGNOSTICS) Check with ignition switch ON. Connector Terminal Resistance to Content Measuring conditions Voltage (V) body (ohms) SPORT shift mode OFF More than 4 SPORT shift indicator — SPORT shift mode with 2nd and 3rd (with SPORT shift) Less than 1 gear...
  • Page 20 TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL AUTOMATIC TRANSMISSION (DIAGNOSTICS) B: SCHEMATIC ( 2 ) (38) ( 3 ) (39) ( 4 ) ( 5 ) (40) (41) ( 6 ) (42) ( 7 ) (43) (46) (44) (45) (47) ( 8 ) (48) ( 9 ) (10)
  • Page 21 TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL AUTOMATIC TRANSMISSION (DIAGNOSTICS) (1) Transmission control module (19) SPORT shift mode switch (41) Torque control cut signal (2) Ignition switch (20) Up switch (with SPORT shift) (42) Torque control signal 2 (3) Brake switch (21) Down switch (with SPORT shift) (43) Torque control signal 1 (4) Brake light...
  • Page 22 TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL AUTOMATIC TRANSMISSION (DIAGNOSTICS) C: MEASUREMENT Only for models with VDC system, measure input/output signal voltage. 1. WAVEFORM 5 ms 2.5 V 1.5 V 3.5 V 2.5 V AT-00644 (A) Can communication line (B) Terminal No.: (C) Terminal No.: (B56) No.

  • Page 23: Subaru Select Monitor

    SUBARU SELECT MONITOR AUTOMATIC TRANSMISSION (DIAGNOSTICS) 6. Subaru Select Monitor NOTE: Do not connect scan tools except for Subaru Select A: OPERATION Monitor and OBD-II general scan tool. 5) Turn ignition switch to ON (engine OFF) and 1. READ DIAGNOSTIC TROUBLE CODE Subaru Select Monitor switch to ON.
  • Page 24 Hold Mode Switch ON or OFF Kick down switch signal Kick Down Switch ON or OFF Automatic transmission fluid temperature lamp ATF Temperature Lamp ON or OFF NOTE: For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. AT-22...
  • Page 25 {Clear Memory} and press the [YES] key. 5) When the `Done' and `Turn Ignition Switch OFF' are shown on the display screen, turn the Subaru Select Monitor and ignition switch to OFF. NOTE: For detailed operation procedure, refer to the SUB- ARU SELECT MONITOR OPERATION MANUAL.

  • Page 26: Read Diagnostic Trouble Code (Dtc)

    READ DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) 7. Read Diagnostic Trouble Code (DTC) A: OPERATION 1. WITHOUT SUBARU SELECT MONITOR Step Value PERFORM READ DIAGNOSTIC TROUBLE Indicator light blinks at every 4- Go to step 2. Repair power sup- CODE (DTC).
  • Page 27 DTC 11 and 23 0.3 0.2 0.3 0.2 0.3 0.2 Unit: Seconds AT-00342 2. WITH SUBARU SELECT MONITOR Refer to Subaru Select Monitor for information about how to obtain and understand trouble codes. <Ref. to AT-21, OPERATION, Subaru Select Mon- itor.> AT-25...

  • Page 28: Inspection Mode

    INSPECTION MODE AUTOMATIC TRANSMISSION (DIAGNOSTICS) 8. Inspection Mode A: OPERATION Raise the vehicle using a garage jack and place on safety stands or drive the vehicle onto free rollers. WARNING: • Before raising the vehicle, ensure parking brakes are applied. •...

  • Page 29: Clear Memory Mode

    Otherwise, trouble codes may not be cleared. 2. WITH SUBARU SELECT MONITOR Refer to Subaru Select Monitor for information about how to clear trouble codes. <Ref. to AT-23, CLEAR MEMORY MODE, OPER- ATION, Subaru Select Monitor.>...

  • Page 30: Power Indicator Light Display

    POWER INDICATOR LIGHT DISPLAY AUTOMATIC TRANSMISSION (DIAGNOSTICS) 10.POWER Indicator Light Display A: INSPECTION When any on-board diagnostics item is malfunctioning, the display on the POWER indicator light blinks from the time the malfunction is detected after starting the engine until the ignition switch is turned OFF. The mal- functioning part or unit can be determined by a DTC during on-board diagnostics operation.

  • Page 31: List Of Diagnostic Trouble Code (Dtc)

    LIST OF DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) 11.List of Diagnostic Trouble Code (DTC) A: LIST DTC No. Item Content of diagnosis Index Detects open or shorted <Ref. to AT-42, DTC 11 ENGINE SPEED SIGNAL, Diag- Engine speed signal input signal circuit.

  • Page 32: Diagnostic Procedure For Power Indicator Light

    DIAGNOSTIC PROCEDURE FOR POWER INDICATOR LIGHT AUTOMATIC TRANSMISSION (DIAGNOSTICS) 12.Diagnostic Procedure for POWER Indicator Light A: POWER INDICATOR LIGHT DOES NOT COME ON OR GO OFF DIAGNOSIS: The POWER Indicator light circuit is open or shorted. TROUBLE SYMPTOM: • When ignition switch is turned to ON (engine OFF), POWER indicator light does not illuminate. •...
  • Page 33 A temporary poor Go to step 9. Perform “Read Diagnostic Trouble Code nates. contact of the con- (DTC)”. <Ref. to AT-24, WITHOUT SUBARU nector or harness SELECT MONITOR, OPERATION, Read may be the cause. Diagnostic Trouble Code (DTC).> Repair harness or...
  • Page 34 Do you have Subaru Select Monitor? able. CHECK INHIBITOR SWITCH. LED lights up. Go to step 11. Check inhibitor 1) Connect Subaru Select Monitor to data link switch circuit. connector. <Ref. to AT-132, 2) Turn ignition switch to ON. CHECK INHIBI- 3) Subaru Select Monitor to ON.
  • Page 35 DIAGNOSTIC PROCEDURE FOR POWER INDICATOR LIGHT AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-33...
  • Page 36 DIAGNOSTIC PROCEDURE FOR POWER INDICATOR LIGHT AUTOMATIC TRANSMISSION (DIAGNOSTICS) B: CHECK POWER SUPPLY AND GROUND LINE WIRING DIAGRAM: BATTERY IGNITION SWITCH B100 DATA LINK CONNECTOR B300 LINE END CHECK CONNECTOR SHIELD AND SENSOR GROUND JOINT CONNECTOR B252 TRANSMISSION B300 B252 1 2 3 4 1 2 3 4 1 2 3 4...
  • Page 37 DIAGNOSTIC PROCEDURE FOR POWER INDICATOR LIGHT AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK BATTERY TERMINAL. There is poor contact. Repair battery ter- Go to step 6. Turn ignition switch to OFF. minal. Is there poor contact at battery terminal? CHECK POWER SUPPLY OF TCM. 10 —...
  • Page 38 DIAGNOSTIC PROCEDURE FOR POWER INDICATOR LIGHT AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 8. Repair open circuit TRANSMISSION AND TRANSMISSION in harness GROUND. between transmis- Measure resistance of harness between trans- sion and transmis- mission and transmission ground.
  • Page 39 DIAGNOSTIC PROCEDURE FOR POWER INDICATOR LIGHT AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-37...

  • Page 40: Diagnostic Procedure For Select Monitor Communication

    DIAGNOSTIC PROCEDURE FOR SELECT MONITOR COMMUNICATION AUTOMATIC TRANSMISSION (DIAGNOSTICS) 13.Diagnostic Procedure for Select Monitor Communication A: COMMUNICATION FOR INITIALIZING IMPOSSIBLE DIAGNOSIS: • Faulty harness connector TROUBLE SYMPTOM: • Select monitor communication failure WIRING DIAGRAM: BATTERY IGNITION SWITCH B100 DATA LINK CONNECTOR B300 LINE END...
  • Page 41 DIAGNOSTIC PROCEDURE FOR SELECT MONITOR COMMUNICATION AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK SUBARU SELECT MONITOR POW- 10 V Go to step 2. Repair harness ER SUPPLY CIRCUIT. and connector Measure voltage between data link connector between battery and chassis ground.
  • Page 42 DIAGNOSTIC PROCEDURE FOR SELECT MONITOR COMMUNICATION AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK OUTPUT SIGNAL FOR TCM. Repair harness A temporary poor 1) Turn ignition switch to ON. and connector contact of the con- 2) Measure voltage between data link connec- between each nector or harness tor and chassis ground.
  • Page 43 DIAGNOSTIC PROCEDURE FOR SELECT MONITOR COMMUNICATION AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-41...

  • Page 44: Diagnostic Procedure With Diagnostic Trouble Code (Dtc)

    DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) 14.Diagnostic Procedure with Diagnostic Trouble Code (DTC) A: DTC 11 ENGINE SPEED SIGNAL DIAGNOSIS: Engine speed input signal circuit is open or shorted. TROUBLE SYMPTOM: • No lock-up (after engine warm-up). •...
  • Page 45 1) Connect connectors to TCM and ECM. the circuit has 2) Connect Subaru Select Monitor to data link returned to a nor- connector. mal condition at 3) Start the engine, and turn Subaru Select this time.
  • Page 46 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CONFIRM DTC 11. DTC11 is displayed. Replace TCM. Replace ECM. Replace ECM with a new one. Does the diag- <Ref. to AT-76, nostic trouble code (DTC) appear again, after Transmission Con- the memory has been cleared? trol Module...
  • Page 47 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-45...
  • Page 48 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) B: DTC 23 MASS AIR FLOW SIGNAL (TURBO MODEL) DIAGNOSIS: The input signal circuit of TCM from ECM is open or shorted. TROUBLE SYMPTOM: Excessive shift shock. WIRING DIAGRAM: B135 ECM B135 1 2 3 4 11 12 13 14 15...
  • Page 49 2) Connect the Subaru Select Monitor to data cuit has returned link connector. to a normal condi- 3) Start the engine and turn the Subaru Select tion at this time. A Monitor switch to ON. temporary poor 4) Warm-up the engine until engine coolant contact of the con- temperature is above 80°C (176°F).
  • Page 50 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) C: DTC 27 ATF TEMPERATURE SENSOR DIAGNOSIS: Input signal circuit of TCM to ATF temperature sensor is open or shorted. TROUBLE SYMPTOM: Excessive shift shock. WIRING DIAGRAM: TRANSMISSION 1 2 3 4 10 11 12 14 15 16 17 18...
  • Page 51 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 2. Repair open circuit TCM AND ATF TEMPERATURE SENSOR. in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connector from transmission transmission con- and TCM.
  • Page 52 ATF temperature decreases? PREPARE SUBARU SELECT MONITOR. Subaru Select Monitor is avail- Go to step 9. Go to step 8. Do you have a Subaru Select Monitor? able. CHECK INPUT SIGNAL FOR TCM. 0.4 — 0.9 V Even if “POWER”...
  • Page 53 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-51...
  • Page 54 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) D: DTC 31 THROTTLE POSITION SENSOR DIAGNOSIS: Input signal circuit of throttle position sensor is open or shorted. TROUBLE SYMPTOM: Shift point too high or too low; excessive shift shock; excessive tight corner “braking”. WIRING DIAGRAM: EXCEPT 3.0 L MODEL B134...
  • Page 55 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) 3.0 L MODEL B135 B134 B137 B136 B252 SHIELD AND SENSOR GROUND THROTTLE JOINT CONNECTOR POSITION SENSOR B252 B136 1 2 3 4 5 6 7 8 9 10 1 2 3 1 2 3 4 1 2 3 4 11 12...
  • Page 56 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK ENGINE GROUND TERMINALS. Engine ground terminals are Go to step 2. Tighten engine Have engine ground terminals been tightened? tightened correctly. ground terminals. 5 Ω CHECK GROUND CIRCUIT OF ECM. Go to step 3.
  • Page 57 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK THROTTLE POSITION SENSOR. 3.0 — 4.2 kΩ Go to step 4. Replace throttle 1) Disconnect connector from throttle position position sensor. sensor. 2) Measure resistance between throttle posi- tion sensor connector receptacle's termi- nals.
  • Page 58 PREPARE SUBARU SELECT MONITOR. Subaru Select Monitor is avail- Go to step 14. Go to step 12. Do you have a Subaru Select Monitor? able. CHECK INPUT SIGNAL FOR TCM. 0.2 — 1.0 V Go to step 13. Go to step 18.
  • Page 59 Go to step 18. SUBARU SELECT MONITOR. 1) Connect connectors to TCM, throttle posi- tion sensor and ECM. 2) Connect Subaru Select Monitor to data link connector. 3) Turn ignition switch to ON (engine OFF). 4) Turn Subaru Select Monitor switch to ON.
  • Page 60 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) E: DTC 33 FRONT VEHICLE SPEED SENSOR DIAGNOSIS: • The vehicle speed signal is abnormal. • The circuit in combination meter is faulty. • The harness connector between TCM and vehicle speed sensor is in short or open. TROUBLE SYMPTOM: •...
  • Page 61 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) WIRING DIAGRAM: SHIELD AND SENSOR GROUND JOINT CONNECTOR : NON-TURBO MODEL : TURBO MODEL : EXCEPT 3.0L MODEL AND TURBO MODEL : 3.0L MODEL AND TURBO MODEL COMBINATION FRONT METER VEHICLE SPEED SENSOR SPEEDOMETER...
  • Page 62 Oscilloscope is available. Go to step 9. Go to step 7. Do you have oscilloscope? PREPARE SUBARU SELECT MONITOR. Subaru Select Monitor is avail- Go to step 10. Go to step 8. Do you have a Subaru Select Monitor? able. AT-60...
  • Page 63 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK INPUT SIGNAL FOR TCM. AC 1 V Even if “POWER” Go to step 11. 1) Connect all connectors. indicator lights up, 2) Lift-up or raise the vehicle and place safety the circuit has stands.
  • Page 64 NOTE: be the case. Raise all wheels off floor. Repair harness or 4) Turn ignition switch to ON and turn Subaru connector in the Select Monitor switch to ON. front vehicle speed 5) Start the engine.
  • Page 65 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-63...
  • Page 66 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) F: DTC 36 TORQUE CONVERTER TURBINE SPEED SENSOR DIAGNOSIS: Input signal circuit of TCM is open or shorted. TROUBLE SYMPTOM: Excessive shift shock. WIRING DIAGRAM: SHIELD JOINT CONNECTOR : NON-TURBO MODEL : TURBO MODEL TORQUE CONVERTER...
  • Page 67 Oscilloscope is available. Go to step 10. Go to step 7. Do you have oscilloscope? PREPARE SUBARU SELECT MONITOR. Subaru Select Monitor is avail- Go to step 9. Go to step 8. Do you have a Subaru Select Monitor? able. AT-65...
  • Page 68 2) Connect Subaru Select Monitor to data link mal condition at connector. this time. A tempo- 3) Turn ignition switch to ON and turn Subaru rary poor contact Select Monitor switch to ON. of the connector or 4) Start the engine.
  • Page 69 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-67...
  • Page 70 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) G: DTC 38 TORQUE CONTROL SIGNAL DIAGNOSIS: • The signal circuit is open or shorted. TROUBLE SYMPTOM: Excessive shift shock. WIRING DIAGRAM: OO : NON-TURBO MODEL WITOUT OBD : NON-TURBO MODEL WITH OBD B135 : 3.0L MODEL AND TURBO MODEL B136...
  • Page 71 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK HARNESS CONNECTOR BETWEEN 1 MΩ Go to step 3. Repair short circuit TCM AND ECM. in harness Measure resistance of harness between TCM between TCM and connector and chassis ground. ECM connector.
  • Page 72 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) H: DTC 45 INTAKE MANIFOLD PRESSURE SIGNAL (NON-TURBO MODEL) DIAGNOSIS: Input signal circuit of TCM from ECM is open or shorted. TROUBLE SYMPTOM: Excessive shift shock. WIRING DIAGRAM: B135 : B136 B137 : OO : 2.0L AND 2.5L MODEL WITHOUT OBD...
  • Page 73 SUBARU SELECT MONITOR. indicator lights up, 1) Connect connectors to TCM and ECM. the circuit has 2) Connect Subaru Select Monitor to data link returned to a nor- connector. mal condition at 3) Start the engine, and turn Subaru Select this time.
  • Page 74 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) I: DTC 71 SHIFT SOLENOID 1 DIAGNOSIS: Output signal circuit of shift solenoid 1 is open or shorted. TROUBLE SYMPTOM: Does not shift. WIRING DIAGRAM: B54 TCM TRANSMISSION 10 11 12 13 14 15 16 17 18 9 10 11 12...
  • Page 75 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 2. Repair open circuit TCM AND TRANSMISSION. in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connector from TCM and trans- transmission con- mission.
  • Page 76 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 10 — 16 Ω CHECK SHIFT SOLENOID 1 (IN TRANSMIS- Go to step 8. Replace shift sole- SION). noid 1. <Ref. to 1) Remove transmission connector from AT-67, Shift Sole- bracket.
  • Page 77 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-75...
  • Page 78 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) J: DTC 72 SHIFT SOLENOID 2 DIAGNOSIS: Output signal circuit of shift solenoid 2 is open or shorted. TROUBLE SYMPTOM: Does not shift. WIRING DIAGRAM: B54 TCM TRANSMISSION 10 11 12 13 14 15 16 17 18 9 10 11 12...
  • Page 79 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 2. Repair open circuit TCM AND TRANSMISSION. in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connector from TCM and trans- transmission con- mission.
  • Page 80 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK POOR CONTACT. There is poor contact. Repair poor con- Replace TCM. Is there poor contact in shift solenoid 2 circuit? tact. <Ref. to AT-76, Transmission Con- trol Module (TCM).>...
  • Page 81 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-79...
  • Page 82 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) K: DTC 73 LOW CLUTCH TIMING SOLENOID DIAGNOSIS: Output signal circuit of low clutch timing solenoid is open or shorted. TROUBLE SYMPTOM: Excessive shift shock. WIRING DIAGRAM: B54 TCM AT 9 TRANSMISSION 10 11 12 13 14 15 16 17 18...
  • Page 83 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 2. Repair open circuit TCM AND TRANSMISSION. in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connector from TCM and trans- transmission con- mission.
  • Page 84 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 10 — 16 Ω CHECK LOW CLUTCH TIMING SOLENOID Go to step 8. Replace low clutch (IN TRANSMISSION). timing solenoid. 1) Remove transmission connector from <Ref. to AT-67, bracket.
  • Page 85 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-83...
  • Page 86 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) L: DTC 74 2-4 BRAKE TIMING SOLENOID DIAGNOSIS: Output signal circuit of 2-4 brake timing solenoid is open or shorted. TROUBLE SYMPTOM: Excessive shift shock. WIRING DIAGRAM: B54 TCM TRANSMISSION 10 11 12 13 14 15 16 17 18 9 10...
  • Page 87 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 2. Repair open circuit TCM AND TRANSMISSION. in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connector from TCM and trans- transmission con- mission.
  • Page 88 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK OUTPUT SIGNAL EMITTED FROM Even if “POWER” Go to step 6. TCM. indicator lights up, 1) Move selector lever to “D”, and slowly the circuit has increase vehicle speed to 65 km/h (40 returned to a nor- MPH).
  • Page 89 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK HARNESS CONNECTOR BETWEEN 1 MΩ Even if “POWER” Repair short circuit 2-4 BRAKE TIMING SOLENOID AND indicator lights up, harness between TRANSMISSION. the circuit has 2-4 brake timing Measure resistance of harness between 2-4 returned to a nor- solenoid and...
  • Page 90 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) M: DTC 75 LINE PRESSURE DUTY SOLENOID DIAGNOSIS: Output signal circuit of line pressure duty solenoid is open or shorted. TROUBLE SYMPTOM: Excessive shift shock. WIRING DIAGRAM: LINE PRESSURE DUTY SOLENOID TRANSMISSION 1 2 3 4...
  • Page 91 PREPARE SUBARU SELECT MONITOR. Subaru Select Monitor is avail- Go to step 7. Go to step 5. Do you have a Subaru Select Monitor? able. CHECK OUTPUT SIGNAL EMITTED FROM 1.5 — 5.0 V Go to step 6. Go to step 9.
  • Page 92 Go to step 9. TCM USING SUBARU SELECT MONITOR. 1) Connect connectors to TCM and transmis- sion. 2) Connect Subaru Select Monitor to data link connector. 3) Start the engine, and turn Subaru Select Monitor switch to ON. 4) Warm-up the transmission until ATF tem- perature is above 80°C (176°F).
  • Page 93 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 12. Repair open circuit TRANSMISSION AND LINE PRESSURE in harness DUTY SOLENOID. between line pres- Measure resistance of harness between line sure duty solenoid pressure duty solenoid and transmission con- and transmission...
  • Page 94 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) N: DTC 76 2-4 BRAKE DUTY SOLENOID DIAGNOSIS: Output signal circuit of 2-4 brake duty solenoid is open or shorted. TROUBLE SYMPTOM: Excessive shift shock. WIRING DIAGRAM: BRAKE DUTY SOLENOID TRANSMISSION 1 2 3 4 10 11 12 13 14 15 16 17 18...
  • Page 95 PREPARE SUBARU SELECT MONITOR. Subaru Select Monitor is avail- Go to step 7. Go to step 5. Do you have a Subaru Select Monitor? able. CHECK OUTPUT SIGNAL EMITTED FROM 1.5 — 5.0 V Go to step 6. Go to step 9.
  • Page 96 Go to step 8. Go to step 9. TCM USING SUBARU SELECT MONITOR. 1) Connect all connectors. 2) Connect Subaru Select Monitor to data link connector. 3) Start the engine, and turn Subaru Select Monitor switch to ON. 4) Warm-up the transmission until ATF tem- perature is above 80°C (176°F).
  • Page 97 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 12. Repair open circuit TRANSMISSION AND 2-4 BRAKE DUTY SO- in harness LENOID. between 2-4 brake Measure resistance of harness between 2-4 duty solenoid and brake duty solenoid and transmission connec- transmission con-...
  • Page 98 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) O: DTC 77 LOCK-UP DUTY SOLENOID DIAGNOSIS: Output signal circuit of lock-up duty solenoid is open or shorted. TROUBLE SYMPTOM: No “lock-up” (after engine warm-up). WIRING DIAGRAM: B54 TCM TRANSMISSION 10 11 12 13 14 15 16 17 18 9 10...
  • Page 99 (T4) No. 13 — No. 16: Is the measured value within the specified range? PREPARE SUBARU SELECT MONITOR. Subaru Select Monitor is avail- Go to step 8. Go to step 6. Do you have a Subaru Select Monitor? able. AT-97...
  • Page 100 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK OUTPUT SIGNAL EMITTED FROM 8.5 V Go to step 7. Go to step 10. TCM. 1) Connect connectors to TCM and transmis- sion. 2) Lift-up the vehicle and place safety stand. NOTE: Raise all wheels off ground.
  • Page 101 2) Lift-up the vehicle and place safety stand. NOTE: Raise all wheels off ground. 3) Connect Subaru Select Monitor to data link connector. 4) Start the engine, and turn Subaru Select Monitor switch to ON. 5) Start the engine and warm-up the transmis- sion until ATF temperature is above 80°C...
  • Page 102 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 10 — 17 Ω CHECK LOCK-UP DUTY SOLENOID (IN Go to step 12. Replace lock-up TRANSMISSION). duty solenoid. 1) Remove transmission connector from <Ref. to AT-67, bracket. Shift Solenoids, 2) Drain automatic transmission fluid.
  • Page 103 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-101...
  • Page 104 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) P: DTC 78 SPORT SHIFT SOLENOID DIAGNOSIS: Output signal circuit of SPORT shift solenoid is open or shorted. TROUBLE SYMPTOM: Engine brake is effective at D, 3, 2, ranges. WIRING DIAGRAM: AT10 TRANSMISSION 10 11 12...
  • Page 105 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 2. Repair open circuit TCM AND TRANSMISSION. in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connector from TCM and trans- transmission con- mission.
  • Page 106 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK OUTPUT SIGNAL EMITTED FROM Even if “POWER” Go to step 6. TCM. indicator lights up, 1) Turn ignition switch OFF. the circuit has 2) Lift-up the vehicle and place safety stand. returned to a nor- mal condition at NOTE:...
  • Page 107 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 9. Repair open circuit SPORT SHIFT SOLENOID AND TRANSMIS- in harness SION. between SPORT Measure resistance of harness between shift shift solenoid and solenoid 1 and transmission connector.
  • Page 108 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Q: DTC 79 TRANSFER DUTY SOLENOID DIAGNOSIS: Output signal circuit of transfer duty solenoid is open or shorted. TROUBLE SYMPTOM: Excessive “braking” in tight corners. WIRING DIAGRAM: TRANSMISSION 10 11 12 13 14 15 16 17 18 9 10 11 12...
  • Page 109 PREPARE SUBARU SELECT MONITOR. Subaru Select Monitor is avail- Go to step 7. Go to step 5. Do you have a Subaru Select Monitor? able. CHECK OUTPUT SIGNAL EMITTED FROM Go to step 9. Go to step 12. TCM.
  • Page 110 Go to step 12. TCM USING SUBARU SELECT MONITOR. 1) Connect connectors to TCM and transmis- sion. 2) Connect Subaru Select Monitor to data link connector. 3) Turn ignition switch to ON (engine OFF) and turn Subaru Select Monitor switch to 4) Shift select lever to D and open throttle fully (vehicle speed 0 km/h or 0 MPH).
  • Page 111 CHECK OUTPUT SIGNAL EMITTED FROM Approx. 40% Even if “POWER” Go to step 12. TCM USING SUBARU SELECT MONITOR. indicator lights up, 1) Move select lever to “N” with throttle fully the circuit has close (vehicle speed 0 km/h or 0 MPH).
  • Page 112 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK HARNESS CONNECTOR BETWEEN 1 MΩ Even if “POWER” Repair short circuit TRANSFER DUTY SOLENOID AND TRANS- indicator lights up, in harness MISSION. the circuit has between transfer Measure resistance of harness between trans- returned to a nor- duty solenoid and...
  • Page 113 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-111...
  • Page 114 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) R: DTC 86 VDC COMMUNICATION SIGNAL DIAGNOSIS: Input signal circuit of TCM is open or shorted. WIRING DIAGRAM: VDC CM JOINT CONNECTOR B234 : LHD MODEL : RHD MODEL B234 1 2 3 4 5 6 1 2 3 4 5 6...
  • Page 115 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK TROUBLE CODE. DTC is displayed. Go to another trou- Go to step 2. Do multiple trouble codes appear in the on- ble code. board diagnostics test mode? 1 Ω...
  • Page 116 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK INPUT SIGNAL FOR TCM USING Same wave form as shown in Go to step 9. Repair poor con- OSCILLOSCOPE. figure. tact in VDCCM. 1) Set oscilloscope to TCM connector termi- nals.
  • Page 117 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-115...
  • Page 118 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) S: DTC 93 REAR VEHICLE SPEED SENSOR DIAGNOSIS: Input signal circuit of TCM is open or shorted. TROUBLE SYMPTOM: No lock-up or excessive tight corner “braking”. WIRING DIAGRAM: SHIELD AND SENSOR GROUND JOINT CONNECTOR : NT...
  • Page 119 Oscilloscope is available. Go to step 10. Go to step 7. Do you have oscilloscope? PREPARE SUBARU SELECT MONITOR. Subaru Select Monitor is avail- Go to step 9. Go to step 8. Do you have a Subaru Select Monitor? able. AT-117...
  • Page 120 NOTE: the cause. Repair Raise all wheels off floor. harness or con- 4) Turn ignition switch to ON and turn Subaru nector in the TCM Select Monitor switch to ON. and transmission. 5) Start the engine. 6) Read data of vehicle speed using Subaru Select Monitor.
  • Page 121 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK INPUT SIGNAL FOR TCM USING AC 1 V Even if “POWER” Go to step 11. OSCILLOSCOPE. indicator lights up, 1) Connect connectors to TCM and transmis- the circuit has sion.
  • Page 122 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-120...

  • Page 123: Diagnostic Procedure For No-Diagnostic Trouble Code (Dtc)

    AT-72, DTC 71 2) Start the engine. SHIFT SOLE- 3) Move select lever to “D”, and drive vehicle. NOID 1, Diagnos- 4) Read data of gear position using Subaru tic Procedure with Select Monitor. Diagnostic Trou- •Gear position is indicated.
  • Page 124 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) B: CHECK FWD SWITCH. DIAGNOSIS: • LED does not come on even if FWD switch is ON. • FWD switch circuit is open or shorted. WIRING DIAGRAM: COMBINATION IGNITION METER BATTERY RELAY No.5...
  • Page 125 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK FWD SWITCH. LED lights up. Go to step CHECK Go to step 2. When fuse is inserted to FWD switch, does BRAKE LED light up? SWITCH.<Ref. to AT-125, CHECK BRAKE SWITCH., Diagnostic Proce-...
  • Page 126 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK INPUT SIGNAL FOR TCM. Go to step 8. Replace TCM. Measure signal voltage for TCM while remov- <Ref. to AT-76, ing the fuse from FWD switch connector. Transmission Con- Connector &...
  • Page 127 TROL SWITCH. ABS-AT CON- <Ref. to AT-125, TROL (NON CON- CHECK CRUISE TROLLED), CONTROL Diagnostics Chart SWITCH., Diag- with Subaru Select nostic Procedure Monitor.> and for No-diagnostic <Ref. to ABS-120, Trouble Code DTC 44 ABS-AT (DTC).> CONTROL (CON- TROLLED), Diag-...
  • Page 128 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) F: CHECK KICK–DOWN SWITCH. DIAGNOSIS: • The kick-down switch is not ON when the throttle is fully open but is OFF when the throttle is partially open or fully closed. •...

  • Page 129: Ignition Switch On (With Engine Off)

    DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK KICK-DOWN SWITCH. Go to step 4. Replace kick-down Measure resistance for kick-down switch when switch. depressing the accelerator pedal. Terminals No. 1 — No. 2: Is the measured value less than the specified value? CHECK KICK-DOWN SWITCH.
  • Page 130 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) G: CHECK POWER MODE SWITCH. DIAGNOSIS: • LED does not come on when power switch is ON. • Power switch circuit is open or shorted. TROUBLE SYMPTOM: No power mode occurs. WIRING DIAGRAM: COMBINATION METER...

  • Page 131: Les Than

    DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK POWER SWITCH OPERATION. LED lights up. Go to step 5. Go to step 2. When power switch is turned OFF, does LED light up? CHECK POWER SWITCH OPERATION. LED lights up.
  • Page 132 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK HARNESS CONNECTOR BETWEEN 1 MΩ Go to step 9. Repair short circuit TCM AND POWER SWITCH. in harness Measure resistance of harness connector between TCM and between TCM and chassis ground. power switch con- Connector &...
  • Page 133 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-131...
  • Page 134 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) H: CHECK INHIBITOR SWITCH. DIAGNOSIS: Input signal circuit of inhibitor switch is open or shorted. TROUBLE SYMPTOM: • Shift characteristics are erroneous. • Engine brake is not effected when selector lever is in “3” range. •...
  • Page 135 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK “P” RANGE SWITCH. LED lights up. Go to step 2. Go to step 22. When “P” range is selected, does LED light CHECK INDICATOR LIGHT. P range indicator lights up. Go to step 3.
  • Page 136 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK INDICATOR LIGHT. 1 range indicator lights up. Go to step 21. Go to step 62. Does combination meter “1” range indicator illuminate? CHECK “1” RANGE SWITCH. LED lights up. Go to step 64.
  • Page 137 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK “P” RANGE INDICATOR LIGHT Bulb is normal. Go to step 27. Replace “P” range BULB. indicator light bulb. 1) Turn ignition switch to OFF. <Ref. to IDI-14, 2) Remove combination meter.
  • Page 138 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK INPUT SIGNAL FOR TCM. Go to step 65. Replace TCM. 1) Position select lever to any other than R <Ref. to AT-76, range. Transmission Con- 2) Measure voltage between TCM and chas- trol Module sis ground.
  • Page 139 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK INPUT SIGNAL FOR TCM. Go to step 37. Go to step 65. 1) Turn ignition switch to OFF. 2) Connect connector to TCM and inhibitor switch. 3) Turn ignition switch to ON. 4) Move select lever to N range.
  • Page 140 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 42. Repair open circuit TCM AND INHIBITOR SWITCH. in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connectors from TCM and inhibitor switch inhibitor switch.
  • Page 141 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK HARNESS CONNECTOR BETWEEN 1 MΩ Go to step 47. Repair ground TCM AND INHIBITOR SWITCH. short circuit in “D” 1) Turn ignition switch to OFF. range circuit. 2) Disconnect connectors from TCM, inhibitor switch and combination meter.
  • Page 142 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 65. Repair open circuit TCM AND COMBINATION METER. in harness 1) Disconnect connectors from TCM and com- between TCM bination meter.
  • Page 143 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK “2” RANGE INDICATOR LIGHT Bulb is normal. Go to step 57. Replace “2” range BULB. indicator light bulb. 1) Turn ignition switch to OFF. <Ref. to IDI-14, 2) Remove combination meter.
  • Page 144 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK INPUT SIGNAL FOR TCM. Go to step 65. Replace TCM. 1) Position select lever to any other than 1 <Ref. to AT-76, range. Transmission Con- 2) Measure voltage between TCM and chas- trol Module sis ground.
  • Page 145 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-143...
  • Page 146 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) I: CHECK HOLD SWITCH. DIAGNOSIS: • LED does not come on when hold switch is ON. • Hold switch circuit is open or shorted. TROUBLE SYMPTOM: • 2nd gear is not held. •...
  • Page 147 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK HOLD SWITCH OPERATION. LED lights up. Go to step 5. Go to step 2. When hold switch is turned OFF, does LED light up? CHECK HOLD SWITCH OPERATION. LED lights up.
  • Page 148 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 9. Repair open circuit TCM AND COMBINATION METER. in harness Measure resistance of harness connector TCM between TCM and and combination meter.
  • Page 149 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-147...
  • Page 150 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) J: CHECK SPORT SHIFT SWITCH. DIAGNOSIS: SPORT shift switch input signal circuit is open or shorted. TROUBLE SYMPTOM: • No SPORT shift mode occurs. • Does not shift gears in SPORT shift mode. WIRING DIAGRAM: 3 4 5 B237...
  • Page 151 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK VEHICLE. Model with sport shift Go to step 2. Go to step SYMP- Is the target model equipped with SPORT TOM RELATED shift? DIAGNOSTIC. <Ref. to AT-160, Symptom Related Diagnostic.>...
  • Page 152 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK HARNESS CONNECTOR BETWEEN Go to step 11. Repair open circuit TCM AND SPORT SHIFT SWITCH. in harness 1) Disconnect connector from TCM. between SPORT 2) Measure resistance of harness between shift switch con- TCM connector and SPORT shift switch nector and TCM...
  • Page 153 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK SPORT SHIFT SWITCH. Go to step 17. Replace guide 1) Move select lever to SPORT shift mode. plate assembly. 2) Measure resistance between SPORT shift switch terminals.
  • Page 154 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK SPORT SHIFT SWITCH. 1 MΩ Go to step 24. Replace guide Measure resistance between SPORT shift plate assembly. switch terminals. Connector & terminal (B237) No. 3 — No. 1: Does the measured value exceed the spec- ified value? 1 Ω...
  • Page 155 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK ground circuit of steering shift Go to step 29. Repair open circuit switch. between steering 1) Turn ignition switch OFF. roll connector and 2) Disconnect connector from steering roll body ground.
  • Page 156 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value 1 Ω CHECK harness connector between TCM The circuit is Repair poor con- and Steering roll connector. returned to a nor- tact or harness 1) Disconnect connector from TCM. mal condition.
  • Page 157 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-155...
  • Page 158 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) K: CHECK SPORT SHIFT INDICATOR. DIAGNOSIS: SPORT shift indicator output signal circuit is open or shorted. TROUBLE SYMPTOM: • SPORT shift indicator does not illuminate or remains illuminated. • SPORT shift indicator display does not change. WIRING DIAGRAM: BATTERY COMBINATION...
  • Page 159 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK SPORT SHIFT INDICATOR. SPORT shift indicator operates <Ref. to AT-158, Go to step 2. Does SPORT shift indicator operate normally normally. CHECK BUZZER., when driving in SPORT shift mode? Diagnostic Proce- dure for No-diag- nostic Trouble...
  • Page 160 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) L: CHECK BUZZER. DIAGNOSIS: Buzzer output signal circuit is open or shorted. TROUBLE SYMPTOM: Buzzer remains sounded. WIRING DIAGRAM: BATTERY COMBINATION BUZZER METER A1 A2 A4 A5 A6 B1 B2 B4 B5 B6 1 2 3 4 5 6 7 8...
  • Page 161 DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC) AUTOMATIC TRANSMISSION (DIAGNOSTICS) Step Value CHECK HARNESS BETWEEN TCM AND 1 MΩ Go to step 2. Repair short circuit COMBINATION METER. in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connector from combination combination meter meter and TCM.

  • Page 162: Symptom Related Diagnostic

    SYMPTOM RELATED DIAGNOSTIC AUTOMATIC TRANSMISSION (DIAGNOSTICS) 16.Symptom Related Diagnostic A: INSPECTION Symptom Problem parts • Inhibitor switch Starter does not rotate when select lever is in “P” or “N”; starter • Select cable rotates when select lever is in “R”, “D”, “3” or “2”. •...
  • Page 163 SYMPTOM RELATED DIAGNOSTIC AUTOMATIC TRANSMISSION (DIAGNOSTICS) Symptom Problem parts • Strainer • Line pressure duty solenoid • Control valve • Drive pinion • Hypoid gear • Axle shaft • Differential gear Vehicle does not start in any shift range (engine revving up). •...
  • Page 164 SYMPTOM RELATED DIAGNOSTIC AUTOMATIC TRANSMISSION (DIAGNOSTICS) Symptom Problem parts • TCM • Shift solenoid 1 No shift occurs from 3rd to 4th gear. • ATF temperature sensor • Control valve • 2-4 brake • Inhibitor switch • TCM Engine brake is not effected when select lever is in “3” range. •...
  • Page 165 SYMPTOM RELATED DIAGNOSTIC AUTOMATIC TRANSMISSION (DIAGNOSTICS) Symptom Problem parts • TCM • Throttle position sensor • 2-4 brake duty solenoid • ATF temperature sensor • Line pressure duty solenoid Shock occurs from 2nd to 3rd gear. • Control valve • High clutch •...
  • Page 166 SYMPTOM RELATED DIAGNOSTIC AUTOMATIC TRANSMISSION (DIAGNOSTICS) Symptom Problem parts • TCM • Throttle position sensor • ATF temperature sensor • Line pressure duty solenoid • Control valve Shock occurs when select lever is moved from “2” to “1” range. • Low & reverse clutch •...
  • Page 167 SYMPTOM RELATED DIAGNOSTIC AUTOMATIC TRANSMISSION (DIAGNOSTICS) Symptom Problem parts • Select cable Select lever slips out of operation during acceleration or while • Select lever driving on rough terrain. • Detent spring • Manual plate System does not shift to SPORT shift mode. SPORT shift mode switch •...
  • Page 168 SYMPTOM RELATED DIAGNOSTIC AUTOMATIC TRANSMISSION (DIAGNOSTICS) MEMO: AT-166...

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