automatic transmission and differential 3-2...feb 13, 2013 · torque control signal 1 b54 13 ......

AUTOMATIC TRANSMISSIONAND DIFFERENTIAL 3-2

PageT DIAGNOSTICS ...................................................................................................2

1. Precaution ...................................................................................................22. Pre-inspection..............................................................................................23. Electrical Components Location..................................................................44. Schematic....................................................................................................95. Transmission Control Module (TCM) I/O Signal .......................................106. Diagnostic Chart for On-board Diagnostics System.................................137. Diagnostics for On-board Diagnostics Failed ...........................................168. Diagnostic Chart with Trouble Code .........................................................239. Diagnostic Chart with Select Monitor......................................................100

10. General Diagnostic Table ........................................................................126

1. PrecautionA: SUPPLEMENTAL RESTRAINTSYSTEM “AIRBAG”Airbag system wiring harness is routed near thetransmission control module (TCM).

CAUTION:� All Airbag system wiring harness and con-nectors are colored yellow. Do not use electri-cal test equipment on these circuit.� Be careful not to damage Airbag system wir-ing harness when performing diagnostics andservicing the TCM.

B: MEASUREMENTWhen measuring voltage and resistance of theECM, TCM or each sensor, use a tapered pin witha diameter of less than 0.64 mm (0.025 in) in orderto avoid poor contact. Do not insert the pin morethan 5 mm (0.20 in).

2. Pre-inspectionA: ATF LEVELMake sure that ATF level is in the specification.

B3M0173A

B: FRONT DIFFERENTIAL OILLEVELMake sure that front differential oil level is in thespecification.

B3M0174A

2

3-2 [T1A0] DIAGNOSTICS1. Precaution

C: OPERATION OF SHIFTSELECTOR LEVERWARNING:Stop the engine while checking operation ofselector lever.

1) Check that selector lever does not move from“N” to “R” without pushing the button.2) Check that selector lever does not move from“R” to “P” without pushing the button.3) Check that selector lever does not move from“P” to “R” without pushing the button.4) Check that selector lever does not move from“3” to “2” without pushing the button.

G3M0717

3

[T2C0] 3-2DIAGNOSTICS2. Pre-inspection

3. Electrical Components LocationA: MODULE

S3M0049A

(1) ECM(2) AT OIL TEMP indicator light (AT

diagnostic indicator light)

(3) TCM (4) Data link connector (for Subaruselect monitor and OBD-II gen-eral scan tool)

4

3-2 [T3A0] DIAGNOSTICS3. Electrical Components Location

B3M0183E S3M0057A

B3M1666C S2M0258C

5

[T3A0] 3-2DIAGNOSTICS3. Electrical Components Location

B: SENSOR

S3M0049D

(1) Throttle position sensor(2) Dropping resistor(3) Vehicle speed sensor 2 (front)

(4) Inhibitor switch(5) Vehicle speed sensor 1 (rear)

(6) Torque converter turbine speedsensor

(7) ATF temperature sensor

6

3-2 [T3B0] DIAGNOSTICS3. Electrical Components Location

S2M0262B B2M2262C

B2M2258C B2M2246D

B2M2260C B2M2261C

7

[T3B0] 3-2DIAGNOSTICS3. Electrical Components Location

C: SOLENOID

B3M1186A

(1) Shift solenoid 1(2) Shift solenoid 2(3) Line pressure duty solenoid

(4) Low clutch timing solenoid(5) Lock-up duty solenoid(6) 2-4 brake duty solenoid

(7) 2-4 brake timing solenoid(8) Transfer duty solenoid

B2M2263D B2M2264E

8

3-2 [T3C0] DIAGNOSTICS3. Electrical Components Location

4. Schematic

S3M0201A

(1) Transmission control module(2) Data link connector(3) Cruise control module(4) ABS control module(5) Ignition switch(6) Brake switch(7) Brake light(8) Battery(9) Combination meter (Speedom-

eter circuit)(10) AT OIL TEMP indicator light(11) FWD indicator light(12) FWD switch(13) “P” range switch(14) “R” range switch

(15) “N” range switch(16) “D” range switch(17) “3” range switch(18) “2” range switch(19) “1” range switch(20) Throttle position sensor(21) Engine speed signal(22) Torque control cut signal(23) Torque control signal 2(24) Torque control signal 1(25) AT load signal(26) AT diagnostics signal(27) Engine control module(28) ATF temperature sensor

(29) Torque converter turbine speedsensor

(30) Vehicle speed sensor 2 (Front)(31) Vehicle speed sensor 1 (Rear)(32) Shift solenoid 1(33) Shift solenoid 2(34) 2-4 brake timing solenoid(35) Line pressure duty solenoid(36) Line pressure dropping resistor(37) 2-4 brake duty solenoid(38) 2-4 brake dropping resistor(39) Lock-up duty solenoid(40) Low clutch timing solenoid(41) Transfer duty solenoid

9

[T400] 3-2DIAGNOSTICS4. Schematic

5. Transmission Control Module (TCM) I/O Signal

B2M2269A

Check with ignition switch ON.

ContentConnec-tor No.

TerminalNo.

Measuring conditions Voltage (V)Resistance

to body(ohms)

Back-up power supply B55 6 Ignition switch OFF 10 — 16 —

Ignition power supplyB54 23 Ignition switch ON (with

engine OFF)10 — 16 —

B54 24

Inhibitor switch

“P” rangeswitch

B55 23

Select lever in “P” range Less than 1

—Select lever in any otherthan “P” range (except “N”

range)More than 8

“N” rangeswitch

B55 22

Select lever in “N” range Less than 1

—Select lever in any otherthan “N” range (except “P”

range)More than 8

“R” rangeswitch

B55 17Select lever in “R” range Less than 1

—Select lever in any otherthan “R” range

More than 9.5

“D” rangeswitch

B55 8Select lever in “D” range Less than 1

—Select lever in any otherthan “D” range

More than 9.5

“3” rangeswitch

B55 18Select lever in “3” range Less than 1

—Select lever in any otherthan “3” range

More than 9.5

“2” rangeswitch



More than 9.5

“1” rangeswitch



More than 9.5

Brake switch B55 24Brake pedal depressed. More than 10.5

—Brake pedal released. Less than 1

ABS signal B54 19ABS switch ON Less than 1

—ABS switch OFF 6.5 — 15

10

3-2 [T500] DIAGNOSTICS5. Transmission Control Module (TCM) I/O Signal



TerminalNo.


to body(ohms)

AT OIL TEMP indicator light B54 3Light ON Less than 1

—Light OFF More than 9

Throttle position sensor B55 2Throttle fully closed. 0.3 — 0.7

—Throttle fully open. 4.3 — 4.9

Throttle position sensor powersupply

B55 1Ignition switch ON (With

engine OFF)4.8 — 5.3 —

ATF temperature sensor B55 11

ATF temperature 20°C(68°F)

2.9 — 4.0 2.1 — 2.9 k

ATF temperature 80°C(176°F)

0.5 — 0.8 275 — 375

Vehicle speed sensor 1 (Rear) B55 3Vehicle stopped. 0

450 — 650Vehicle speed at least 20km/h (12 MPH)

More than 1 (AC range)

Vehicle speed sensor 2 (Front) B55 5Vehicle speed at least 20

km/h (12 MPH)More than 1 (AC range)

4450 — 650

Torque converter turbine speedsensor

B55 12Vehicle stopped 0

450 — 650Vehicle speed at least 20km/h (12 MPH)

More than 1 (AC range)

Vehicle speed output signal B55 13Vehicle speed at most 10

km/h (6 MPH)Less than 1←→More than 4 —

Engine speed signal B55 4

Ignition switch ON (withengine OFF)

More than 10.5—

Ignition switch ON (withengine ON)

8 — 11

Cruise set signal B54 11

When cruise control is set(SET lamp ON)

Less than 1—

When cruise control is notset (SET lamp OFF)

More than 6.5

Torque control signal 1 B54 13Ignition switch ON (with

engine ON)4 — 6 —

Torque control signal 2 B54 21Ignition switch ON (with

engine ON)More than 9 —

Torque control cut signal B54 2 Ignition switch ON 8 —Intake manifold pressure signal B55 20 Engine idling after warm-up. 1.2 — 1.8 —

Shift solenoid 1 B54 71st or 4th gear More than 9

10 — 162nd or 3rd gear Less than 1

Shift solenoid 2 B54 61st or 2nd gear More than 9

10 — 163rd or 4th gear Less than 1

Line pressure duty solenoid B54 9

Throttle fully closed (withengine OFF) after warm-up.

1.5 — 4.02.0 — 4.5

Throttle fully open (withengine OFF) after warm-up.

Less than 0.5

Dropping resistor B54 18


More than 8.59 — 15


Less than 0.5

Lock-up duty solenoid B54 16When lock up occurs. More than 8.5

10 — 17When lock up is released. Less than 0.5

11

[T500] 3-2DIAGNOSTICS5. Transmission Control Module (TCM) I/O Signal



TerminalNo.


to body(ohms)

Transfer duty solenoid B54 15

Fuse on FWD switch More than 8.5

10 — 17Fuse removed from FWDswitch (with throttle fully

open and with select leverin 1st gear).

Less than 0.5

2-4 brake duty solenoid B54 8


1.5 — 4.02.0 — 4.5


Less than 0.5

2-4 brake dropping resistor B54 17


More than 8.59 — 15


Less than 0.5

2-4 brake timing solenoid B54 51st gear Less than 1

10 — 163rd gear More than 9

Low clutch timing solenoid B54 142nd gear Less than 1

10 — 164th gear More than 9

Sensor ground line 1 B55 10 — 0 Less than 1Sensor ground line 2 B55 21 — 0 Less than 1

System ground line B559

— 0 Less than 119

FWD switch B55 14Fuse removed. 6 — 9.1

—Fuse installed. Less than 1

FWD indicator light B54 12Fuse ON FWD switch Less than 1

—Fuse removed from FWDswitch

More than 9

AT diagnosis signal B54 4 Ignition switch ONLess than 1←→More than 4 —

Data link signal (Subaru SelectMonitor)

B557 — —

—16 — —

12

3-2 [T500] DIAGNOSTICS5. Transmission Control Module (TCM) I/O Signal

6. Diagnostic Chart for On-board Diagnostics SystemA: BASIC DIAGNOSTICS PROCEDURE

H3M1672H

13

[T6A0] 3-2DIAGNOSTICS6. Diagnostic Chart for On-board Diagnostics System

B: ABNORMAL DISPLAY ON AT OILTEMP INDICATORWhen any on-board diagnostics item ismalfunctioning, the display on the AT OIL TEMPindicator light blinks from the time the malfunctionis detected after starting the engine until the igni-tion switch is turned OFF. The malfunctioning partor unit can be determined by a trouble code dur-

ing on-board diagnostics operation. Problemswhich occurred previously can also be identifiedthrough the memory function. If the AT OIL TEMPindicator does not show a problem (although aproblem is occurring), the problem can be deter-mined by checking the performance characteristicsof each sensor using the select monitor. Indicatorsignal is as shown in the figure.

S3M0062A

14

3-2 [T6B0] DIAGNOSTICS6. Diagnostic Chart for On-board Diagnostics System

C: ON-BOARD DIAGNOSTICS

S3M0063B

15

[T6C0] 3-2DIAGNOSTICS6. Diagnostic Chart for On-board Diagnostics System

7. Diagnostics for On-board Diagnostics FailedA: AT OIL TEMP INDICATOR LIGHTDIAGNOSIS:The AT OIL TEMP indicator light circuit is open or shorted.TROUBLE SYMPTOM:� When ignition switch is turned to ON (engine OFF), AT OIL TEMP indicator light does not illuminate.� When on-board diagnostics is performed, AT OIL TEMP indicator light remains illuminated.WIRING DIAGRAM:

S3M0458

7A1 : CHECK AT OIL TEMP INDICATORLIGHT.

Turn ignition switch to ON (engine OFF).

: Does AT OIL TEMP indicator light illu-minate?

: Go to step 7A4.: Go to step 7A2.

7A2 : CHECK FUSE (NO. 5).

Remove fuse (No. 5).

: Is the fuse (No. 5) blown out?: Replace fuse (No. 5). If replaced fuse

(No. 5) is blown out easily, repair shortcircuit in harness between fuse (No. 5)and combination meter.

: Go to step 7A3.

16

3-2 [T7A0] DIAGNOSTICS7. Diagnostics for On-board Diagnostics Failed


1) Turn ignition switch to OFF.2) Remove combination meter.3) Remove ATF OIL TEMP indicator light bulbfrom combination meter.

: Is ATF OIL TEMP indicator light bulbOK?

: Go to step 7A5.: Replace AT OIL TEMP indicator light

bulb.


Perform on-board diagnostics.

: Does AT OIL TEMP indicator lightblink?

: A temporary poor contact of the connec-tor or harness may be the cause. Repairharness or connector in TCM, inhibitorswitch and combination meter.

: Go to step 7A8.

7A5 : CHECK HARNESS CONNECTORBETWEEN COMBINATION METERAND IGNITION SWITCH.

1) Turn ignition switch to ON (engine OFF).2) Measure voltage between combination meterconnector and chassis ground.

Connector & terminal(i10) No. 7 (+) — Chassis ground (−):

S3M0046A

: Is voltage more than 10 V?: Go to step 7A6.: Repair open circuit in harness between

combination meter and battery.

7A6 : CHECK OPEN CIRCUIT OF HAR-NESS.

1) Disconnect connector from combination meterconnector.2) Measure resistance of harness between com-bination meter.

Connector & terminal(B54) No. 3 — (i10) No. 8:

B3M1189B

: Is the resistance less than 1 Ω?: Go to step 7A7.: Repair open circuit in harness between

TCM and combination meter, and poorcontact in coupling connector.

17

[T7A6] 3-2DIAGNOSTICS7. Diagnostics for On-board Diagnostics Failed

7A7 : CHECK INPUT SIGNAL FOR TCM.

1) Connect connector to TCM and combinationmeter.2) Turn ignition switch to ON (engine OFF).3) Measure voltage between TCM connector andchassis ground.

Connector & terminal(B54) No. 3 (+) — Chassis ground (−):

B3M1190A

: Is the voltage less than 1 V?: Even if AT OIL TEMP indicator lights up,

the circuit has returned to a normal con-dition at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin TCM.

: Replace TCM.

7A8 : CHECK INHIBITOR SWITCH.

1) Connect Subaru Select Monitor to data linkconnector.2) Turn ignition switch to ON.3) Subaru Select Monitor to ON.4) Read data of range switch using Subaru SelectMonitor.� Range switch is indicated in ON ⇔ OFF.

: When each range is selected, doesLED of Subaru Select Monitor lightup?

: Go to step 7A9.: Check inhibitor switch circuit.

7A9 : CHECK SHORT CIRCUIT OF HAR-NESS.

1) Disconnect connector from TCM.2) Remove combination meter.3) Disconnect connector from combination meter.4) Measure resistance of harness connectorbetween TCM and combination meter.

Connector & terminal/specified resistance(B54) No. 3 — Chassis ground:

B3M1191A

: Is the resistance less than 1 MΩ?: Replace TCM. : Repair short circuit in harness between

combination meter connector and TCMconnector.

18

3-2 [T7A7] DIAGNOSTICS7. Diagnostics for On-board Diagnostics Failed

MEMO:

19

[T7A9] 3-2DIAGNOSTICS7. Diagnostics for On-board Diagnostics Failed

B: CONTROL MODULE POWER SUPPLY AND GROUND LINEWIRING DIAGRAM:

S3M0459

7B1 : CHECK FUSE (NO. 4).



(No. 4) has blown out easily, repair shortcircuit in harness between fuse (No. 4)and TCM.

: Go to step 7B2.

7B2 : CHECK BACK-UP POWER SUPPLYCIRCUIT.

1) Turn ignition switch to ON.2) Measure back-up power supply voltagebetween TCM connector terminal.

Connector & terminal(B55) No. 6 (+) — No. 19 (−):

B3M1194A

: Is the voltage more than 10 V?: Go to step 7B3.: Repair open circuit in harness between

fuse (No. 4) and TCM, and poor contactin coupling connector.

20

3-2 [T7B0] DIAGNOSTICS7. Diagnostics for On-board Diagnostics Failed

7B3 : CHECK FUSE (NO. 5).



(No. 5) has blown out easily, repair shortcircuit in harness between fuse (No. 5)and TCM.

: Go to step 7B4.

7B4 : CHECK IGNITION POWER SUPPLYCIRCUIT.

1) Turn ignition switch to ON (engine OFF).2) Measure ignition power supply voltage betweenTCM connector terminal.

Connector & terminal(B54) No. 23 (+) — (B55) No. 19 (−):

B3M1195A

: Is the voltage more than 10 V?: Go to step 7B5.: Go to step 7B6.

7B5 : CHECK IGNITION POWER SUPPLYCIRCUIT.

1) Turn ignition switch to ON (engine OFF).2) Measure ignition power supply voltage betweenTCM connector terminal.

Connector & terminal(B54) No. 24 (+) — (B55) No. 19:

B3M1196A

: Is the voltage more than 10 V?: Go to step 7B6.: Repair open circuit in harness between

TCM and battery, and poor contact incoupling connector.

21

[T7B5] 3-2DIAGNOSTICS7. Diagnostics for On-board Diagnostics Failed

7B6 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.

1) Turn ignition switch to OFF.2) Disconnect connector from TCM and transmis-sion.3) Measure resistance of harness between TCMand transmission connector.

Connector & terminal(B55) No. 19 — (B11) No. 16:

B3M1197A

: Is the resistance less than 1 Ω?: Go to step 7B7.: Repair open circuit in harness between

TCM and transmission harness connec-tor.

7B7 : CHECK HARNESS CONNECTORBETWEEN TRANSMISSION ANDTRANSMISSION GROUND.

Measure resistance of harness between transmis-sion and transmission ground.

Connector & terminal(T4) No. 16 — Transmission ground:

B3M1198A


transmission and transmission ground.

7B8 : CHECK HARNESS CONNECTORBETWEEN INHIBITOR SWITCH ANDTCM.

1) Turn ignition switch to OFF.2) Disconnect connector from inhibitor switch.3) Measure resistance of harness between inhibi-tor switch side connector and TCM.


B3M1689A


TCM and inhibitor side connector, andpoor contact in coupling connector.

7B9 : CHECK POOR CONTACT.

: Is there poor contact in control mod-ule power supply and ground line?

: Repair poor contact and ground termi-nal.

: Replace TCM.

22

3-2 [T7B6] DIAGNOSTICS7. Diagnostics for On-board Diagnostics Failed

8. Diagnostic Chart with Trouble CodeA: LIST OF TROUBLE CODE1. TROUBLE CODE

Trouble code Item Content of diagnosis Title index No.11 Engine speed signal Detects open or shorted input signal circuit. 27 ATF temperature sensor Detects open or shorted input signal circuit. 31 Throttle position sensor Detects open or shorted input signal circuit.

33Vehicle speed sensor 2

(Front)Detects open or shorted input signal circuit.

36Torque converter turbine

speed sensorDetects open or shorted input signal circuit.

38 Torque control signal Detects open or shorted input signal circuit.

45Intake manifold pressure sig-

nalDetects open or shorted input signal circuit.

71 Shift solenoid 1Detects open or shorted output signal cir-cuit.

72 Shift solenoid 2Detects open or shorted output signal cir-cuit.

73 Low clutch timing solenoidDetects open or shorted output signal cir-cuit.

74 2-4 brake timing solenoidDetects open or shorted output signal cir-cuit.

75 Line pressure duty solenoidDetects open or shorted output signal cir-cuit.

76 2-4 brake duty solenoidDetects open or shorted output signal cir-cuit.

77 Lock-up duty solenoidDetects open or shorted output signal cir-cuit.

79 Transfer duty solenoidDetects open or shorted output signal cir-cuit.

93 Vehicle speed sensor 1 (Rear) Detects open or shorted input signal circuit.

23

[T8A1] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

2. HOW TO READ TROUBLE CODE OF INDICATOR LIGHTThe AT OIL TEMP indicator light flashes the code corresponding to the faulty part.The long segment (1.2 sec on) indicates a “ten”, and the short segment (0.2 sec on) signifies a “one”.

B3M1199A

B: CLEAR MEMORYCurrent trouble codes shown on the display arecleared by turning the ignition switch OFF afterconducting on-board diagnostics operation. Previ-ous trouble codes, however, cannot be clearedsince they are stored in the TCM memory which isoperating on the back-up power supply. Thesetrouble codes can be cleared by removing thespecified fuse (located under the light or left lowerposition of the instrument panel).

CLEAR MEMORY:Removal of No. 4 fuse (for at least oneminute)

� The No. 4 fuse is located in the line to thememory back-up power supply of the TCM.Removal of this fuse clears the previous troublecodes stored in the TCM memory.� Be sure to remove the No. 4 fuse for at least thespecified length of time. Otherwise, trouble codesmay not be cleared.

24

3-2 [T8A2] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

MEMO:

25

[T8B0] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

C: TROUBLE CODE 11 — ENGINE SPEED SIGNAL —DIAGNOSIS:Engine speed input signal circuit is open or shorted.TROUBLE SYMPTOM:� No lock-up (after engine warm-up).� AT OIL TEMP indicator remains on when vehicle speed is “0”.WIRING DIAGRAM:

S3M0204

8C1 : CHECK HARNESS CONNECTORBETWEEN TCM AND ECM.

1) Turn ignition switch to OFF.2) Disconnect connectors from TCM and ECM.3) Measure resistance of harness between TCMand ECM connector.


B3M1200A

: Is the resistance less than 1 Ω?: Go to step 8C2.: Repair open circuit in harness between

TCM and ECM connector.

8C2 : CHECK HARNESS CONNECTORBETWEEN TCM AND ECM.

Measure resistance of harness between TCM con-nector and chassis ground.

Connector & terminal(B55) No. 4 — Chassis ground:

B3M1202A

: Is the resistance more than 1 MΩ?: Go to step 8C3.: Repair short circuit in harness between


26

3-2 [T8C0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8C3 : PREPARE SUBARU SELECT MONI-TOR.

: Do you have a Subaru Select Moni-tor?

: Go to step 8C5.: Go to step 8C4.

8C4 : CHECK INPUT SIGNAL FOR TCM.

1) Connect connectors to TCM and ECM.2) Turn ignition switch to ON (engine OFF).3) Measure voltage between TCM connector andchassis ground.

Connector & terminal(B55) No. 4 (+) — Chassis ground (−):

B3M1203A

: Is the voltage more than 10.5 V?: Even if “AT OIL TEMP” lights up, the

circuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin the TCM and ECM.

: Go to step 8C6.

8C5 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR.

1) Connect connectors to TCM and ECM.2) Connect Subaru Select Monitor to data linkconnector.

S2M0258

3) Start the engine, and turn Subaru Select Moni-tor switch to ON.4) Warm-up the engine until engine coolant tem-perature is above 80°C (176°F).5) Engine idling.6) Read data of engine speed using SubaruSelect Monitor.� Display shows engine speed signal value sentfrom ECM.

: Is the revolution value the same asthe tachometer reading shown on thecombination meter?

: Even if “AT OIL TEMP” lights up, thecircuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin the TCM and ECM.

: Go to step 8C6.

8C6 : CHECK POOR CONTACT.

: Is there poor contact in engine speedsignal circuit?

: Repair poor contact.: Go to step 8C7.

8C7 : CONFIRM TROUBLE CODE 11.

: Replace ECM with a new one. Doesthe trouble code appear again, afterthe memory has been cleared?

: Replace TCM. : Replace ECM.

27

[T8C7] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

D: TROUBLE CODE 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:

B2M2219

8D1 : CHECK HARNESS CONNECTORBETWEEN TCM AND ATF TEMPERA-TURE SENSOR.

1) Turn ignition switch to OFF.2) Disconnect connector from transmission andTCM.3) Measure resistance of harness between TCMand transmission connector.


B3M1313A

: Is the resistance less than 1 Ω?: Go to step 8D2.: Repair open circuit in harness between

TCM and transmission connector.


Measure resistance of harness between TCM andtransmission connector.


B3M1314A



28

3-2 [T8D0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code




B3M1315A

: Is the resistance more than 1 MΩ?: Go to step 8D4.: Repair short circuit in harness between





B3M1316A



8D5 : CHECK ATF TEMPERATURE SEN-SOR.

1) Turn ignition switch to OFF.2) Connect connectors to transmission and TCM.3) Turn ignition switch to ON and start engine.4) Warm-up the transmission until ATF tempera-ture reaches to 80°C (176°F).

NOTE:If ambient temperature is below 0°C (32°F), drivethe vehicle until the ATF reaches its operating tem-perature.

5) Measure resistance between transmission con-nector terminals.6) Disconnect connector from transmission.

Connector & terminal(T4) No. 11 — No. 12:

S3M0276A

: Is the resistance between 275 and375 Ω?

: Go to step 8D6.: Go to step 8D12.

29

[T8D5] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8D6 : CHECK ATF TEMPERATURE SEN-SOR.

1) Turn ignition switch to ON (engine OFF).2) Measure resistance between transmission con-nector terminals.


S3M0276A

: Does the resistance value increasewhile the ATF temperaturedecreases?


8D7 : PREPARE SUBARU SELECT MONI-TOR.



8D8 : CHECK INPUT SIGNAL FOR TCM.

1) Warm-up the transmission until ATF tempera-ture is about 80°C (176°F).


2) Measure voltage between TCM connector ter-minal.


B3M1319A

: Is the voltage between 0.5 and 0.8 V?: Even if “AT OIL TEMP” lights up, the

circuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or contact inthe TCM.

: Go to step 8D11.

30


8D9 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR.

1) Turn ignition switch to OFF.2) Connect connectors to TCM and transmission.3) Connect Subaru Select Monitor to data linkconnector.

S2M0258

4) Start the engine, and turn Subaru Select Moni-tor switch to ON.5) Warm-up the transmission until ATF tempera-ture is above 80°C (176°F).


6) Read data of ATF temperature using SubaruSelect Monitor.� ATF temperature is indicated in “°F” or “°C”.

: Is the ATF temperature between 70and 110°C (158 and 230°F).


8D10 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR.

Turn ignition switch to ON (engine OFF).

: Does the ATF temperature graduallydecrease?

: Even if “AT OIL TEMP” light up, the cir-cuit has returned to a normal conditionat this time. A temporary poor contact ofthe connector or harness may be thecase. Repair harness or contact in theATF temperature sensor and transmis-sion connector.

: Go to step 8D11.

8D11 : CHECK POOR CONTACT.

: Is there poor contact in ATF tempera-ture sensor circuit?

: Repair poor contact.: Replace TCM.

8D12 : CHECK HARNESS CONNECTORBETWEEN TRANSMISSION ANDATF TEMPERATURE SENSOR.

1) Turn ignition switch to OFF.2) Disconnect connector from transmission.3) Remove transmission connector from bracket.4) Lift-up the vehicle and place safety stand.

CAUTION:On AWD models, raise all wheels off ground.

5) Drain automatic transmission fluid.

CAUTION:Do not drain the automatic transmission fluiduntil it cools down.

6) Remove oil pan, and disconnect connectorfrom ATF temperature sensor connector.7) Measure resistance of harness between ATFtemperature sensor and transmission connector.

Connector & terminal(T4) No. 11 — (AT1) No. 2:

B3M1320A


ATF temperature sensor and transmis-sion connector.

31



Measure resistance of harness between ATF tem-perature sensor and transmission connector.


B3M1321A




Measure resistance of harness between transmis-sion connector and transmission ground.


B3M1322A




Measure resistance of harness between transmis-sion connector and transmission ground.


B3M1323A

: Is the resistance more than 1 MΩ?: Replace ATF temperature sensor. : Repair short circuit in harness between


32


MEMO:

33


E: TROUBLE CODE 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; engine brake not effected in “3” range: excessive shift shock; excessive tightcorner “braking”.WIRING DIAGRAM:

S3M0460

34

3-2 [T8E0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8E1 : CHECK THROTTLE POSITION SEN-SOR.

1) Turn ignition switch to OFF.2) Disconnect connector from throttle positionsensor.3) Measure resistance between throttle positionsensor connector receptacle’s terminals.

TerminalsNo. 4 — No. 2:

B3M1207

: Is the resistance between 0.3 and 0.7kΩ?

: Go to step 8E2.: Replace throttle position sensor.

8E2 : CHECK THROTTLE POSITION SEN-SOR.

Measure resistance between throttle position sen-sor connector receptacle’s terminals.


B3M1206

: Is the resistance between 3.5 and 6.5kΩ?

: Go to step 8E3.: Replace throttle position sensor.

8E3 : CHECK HARNESS CONNECTORBETWEEN TCM AND THROTTLEPOSITION SENSOR.

1) Disconnect connector from TCM.2) Measure resistance of harness between TCMand throttle position sensor connector.

Connector & terminal(B55) No. 2 — (E13) No. 3:

B3M1208A

: Is the resistance less than 1 Ω?: Go to step 8E4.: Repair open circuit in harness between

TCM and throttle position sensor con-nector.


Measure resistance of harness between TCM andthrottle position sensor connector.

Connector & terminal(B55) No. 1 — (E13) No. 4:

B3M1209A

: Is the resistance less than 1 Ω?: Go to step 8E5.: Repair open circuit in harness between


35

[T8E4] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code




B3M1214A

: Is the resistance more than 1 MΩ?: Go to step 8E6.: Repair short circuit in harness between





B3M1215A

: Is the resistance more than 1 MΩ?: Go to step 8E7.: Repair short circuit in harness between


8E7 : PREPARE SUBARU SELECT MONI-TOR.


: Go to step 8E10.: Go to step 8E8.

8E8 : CHECK INPUT SIGNAL FOR TCM.

1) Connect connectors to TCM, throttle positionsensor and ECM.2) Turn ignition switch to ON (engine OFF).3) Measure voltage between TCM connector ter-minals.


B3M1218A

: Is the voltage between 0.3 and 0.7 Vin throttle fully closed?


36


8E9 : CHECK INPUT SIGNAL FOR TCM.

Measure voltage between TCM connector termi-nals.


B3M1218A

: Is the voltage between 4.3 and 4.9 Vwith throttle fully open?


8E10 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR.

1) Connect connectors to TCM, throttle positionsensor and ECM.2) Connect Subaru Select Monitor to data linkconnector.

S2M0258

3) Turn ignition switch to ON (engine OFF).4) Turn Subaru Select Monitor switch to ON.5) Throttle fully closed.6) Read data of throttle position sensor usingSubaru Select Monitor.� Throttle position sensor input signal is indicated.

: Is the value voltage between 0.3 and0.7 V?


8E11 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR.

Throttle fully open.

NOTE:Must be changed correspondingly with acceleratorpedal operation (from “released” to “depressed”position).



8E12 : CHECK INPUT SIGNAL FOR TCM(THROTTLE POSITION SENSORPOWER SUPPLY).

Measure voltage between TCM connector andchassis ground.

Connector & terminal(B55) No. 1 (+) — Chassis ground:

H3M1949A


circuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin throttle position sensor circuit.

: Go to step 8E14.

37


8E13 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR(THROTTLE POSITION SENSORPOWER SUPPLY).

Read data of throttle position sensor power supplyusing Subaru Select Monitor.� Throttle position sensor power supply voltage isindicated.


: Even if “AT OIL TEMP” lights up, thecircuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin throttle position sensor circuit.

: Go to step 8E14.

8E14 : CHECK POOR CONTACT.

: Is there poor contact in throttle posi-tion sensor circuit?


38


MEMO:

39


F: TROUBLE CODE 33 — VEHICLE SPEED SENSOR 2 (FRONT) —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:� Erroneous idling.� Engine stalls.� Poor driving performance.WIRING DIAGRAM:

S3M0206

8F1 : CHECK OPERATION OF SPEEDOM-ETER.

: Does speedometer operate nor-mally?

: Even if “AT OIL TEMP” lights up, thecircuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin the TCM and transmission.

: Go to step 8F2.

40

3-2 [T8F0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8F2 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.

1) Disconnect connector from TCM.2) Measure resistance of harness between TCMand transmission connector.


B3M1247A

: Is the resistance less than 1 Ω?: Go to step 8F3.: Repair open circuit in harness between





B3M1248A


TCM and transmission connector, andpoor contact in coupling connector.


Measure resistance of harness between TCM andchassis ground.


B3M1249A

: Is the resistance more than 1 MΩ?: Go to step 8F5.: Repair short circuit in harness between





B3M1250A



41

[T8F5] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8F6 : CHECK VEHICLE SPEED SENSOR 2.

1) Turn ignition switch to OFF.2) Disconnect connector from transmission.3) Measure resistance between transmission con-nector receptacle’s terminals.


B3M1251A


: Go to step 8F7.: Replace vehicle speed sensor 2.

8F7 : PREPARE OSCILLOSCOPE.

: Do you have oscilloscope?: Go to step 8F10.: Go to step 8F8.

8F8 : PREPARE SUBARU SELECT MONI-TOR.


: Go to step 8F11.: Go to step 8F9.

8F9 : CHECK INPUT SIGNAL FOR TCM.

1) Connect all connectors.2) Lift-up or raise the vehicle and place safetystands.

CAUTION:On AWD models, raise all wheels off floor.

3) Start the engine and set vehicle in 20 km/h (12MPH) condition.

NOTE:The speed difference between front and rearwheels may light the ABS warning light, but thisindicates no malfunction. When AT control diagno-sis is finished, perform the ABS memory clearanceprocedure of on-board diagnostics system.

4) Measure voltage between TCM connector ter-minals.


B3M1252A

: Is the voltage more than AC 1 V?: Go to step 8F12.: Go to step 8F19.

42


8F10 : CHECK VEHICLE SPEED SENSOR 2USING OSCILLOSCOPE.

1) Connect all connectors.2) Lift-up the vehicle and place safety stand.


3) Set oscilloscope to TCM connector terminals.Positive prove; (B55) No. 5Earth lead; (B55) No. 21

B3M1253A

4) Start the engine, and drive the wheels slowly.

NOTE:The speed difference between front and rearwheels may light the ABS warning light, but thisindicates no malfunctions. When AT control diag-nosis is finished, perform the ABS memory clear-ance procedure of self-diagnosis system.

5) Measure signal voltage indicated on oscillo-scope.

B3M0254A

: Is the voltage more than AC 4 V?: Go to step 8F12.: Go to step 8F19.

8F11 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR.

1) Connect all connectors.2) Connect Subaru Select Monitor to data linkconnector.

S2M0258

3) Lift-up or raise the vehicle and place safetystands.


4) Turn ignition switch to ON and turn SubaruSelect Monitor switch to ON.5) Start the engine.6) Read data of vehicle speed using SubaruSelect Monitor.� Compare speedometer with Subaru SelectMonitor indications.� Vehicle speed is indicated in “km/h” or “MPH”.7) Slowly increase vehicle speed to 60 km/h or 37MPH.


: Does the speedometer indicationincrease as the Subaru Select Moni-tor data increases?


43


8F12 : CHECK HARNESS CONNECTORBETWEEN TCM AND COMBINATIONMETER.

1) Turn ignition switch to OFF.2) Disconnect connectors from TCM and combi-nation meter.3) Measure resistance of harness between TCMand combination meter connector.

Connector & terminal(B55) No. 13 — (i12) No. 11:

S3M0207A


TCM and combination meter connector,and poor contact in coupling connector.

8F13 : CHECK HARNESS CONNECTORBETWEEN TCM AND COMBINATIONMETER.

Measure resistance of harness between combina-tion meter and chassis ground.

Connector & terminal(i12) No. 11 — Chassis ground:

S3M0208A


TCM and combination meter connector.

8F14 : PREPARE OSCILLOSCOPE.

: Do you have oscilloscope?: Go to step 8F17.: Go to step 8F15.

8F15 : PREPARE SUBARU SELECT MONI-TOR.



44


8F16 : CHECK OUTPUT SIGNAL FOR TCM.



3) Set vehicle in 10 km/h (6 MPH) condition.

NOTE:The speed difference between front and rearwheels may light ABS warning light, but this indi-cates no malfunction. When AT control diagnosis isfinished, perform the ABS memory clearance pro-cedure on on-board diagnostics system.



H3M1946A

: Is the voltage less than 1 V ←→ morethan 4 V?

: Even if “AT OIL TEMP” lights up, thecircuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin the TCM.

: Go to step 8F19.

8F17 : CHECK INPUT SIGNAL FOR TCMUSING OSCILLOSCOPE.

1) Connect connectors to TCM and combinationmeter.2) Lift-up or raise the vehicle and place safetystands.


3) Set oscilloscope to TCM connector terminals.Positive prove; (B55) No. 13Earth lead; (B55) No. 21

H3M1972A

4) Start the engine.5) Shift on the gear position, and keep the vehiclespeed at constant.6) Measure signal voltage indicated on oscillo-scope.

NOTE:� If vehicle speed increases, the width of ampli-tude (W) decreases.� The speed difference between front and rearwheels may light the ABS warning light, but thisindicates no malfunction. When AT control diagno-sis is finished, perform the ABS memory clearanceprocedure of on-board diagnostics system.

G2M0931

: Is the voltage more than AC 2 V?: Even if “AT OIL TEMP” lights up, the

circuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin the TCM.

: Go to step 8F19.

45


8F18 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR.



3) Connect Subaru Select Monitor to data linkconnector.

S2M0258

4) Turn ignition switch to ON and Subaru SelectMonitor switch to ON.5) Start the engine, and drive all wheels.6) Read data of vehicle speed using SubaruSelect Monitor.� Compare speedometer with Subaru SelectMonitor indications.� Vehicle speed is indicated in “km/h” or “MPH”.7) Slowly increase vehicle speed to 60 km/h or 37MPH.


: Does the speedometer indicationincrease as the Subaru Select Moni-tor data increases?

: Even if “AT OIL TEMP” lights up, thecircuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin the TCM.

: Go to step 8F19.

8F19 : CHECK POOR CONTACT.

: Is there poor contact in vehicle speedsensor 2 circuit?


46


MEMO:

47


G: TROUBLE CODE 36 — TORQUE CONVERTER TURBINE SPEED SENSOR—DIAGNOSIS:Input signal circuit of TCM is open or shorted.TROUBLE SYMPTOM:Excessive shift shock.WIRING DIAGRAM:

S3M0209

8G1 : CHECK VEHICLE SPEED SENSOR 1.

1) Turn ignition switch to OFF.2) Disconnect connector from transmission.3) Measure resistance between transmission con-nector receptacle’s terminals.


B3M1293A


: Go to step 8G2.: Replace torque converter turbine speed

sensor.

8G2 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.



B3M1294A

: Is the resistance less than 1 Ω?: Go to step 8G3.: Repair open circuit in harness between


48

3-2 [T8G0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code




B3M1295A

: Is the resistance less than 1 Ω?: Go to step 8G4.: Repair open circuit in harness between





B3M1296A

: Is the resistance more than 1 MΩ?: Go to step 8G5.: Repair short circuit in harness between





B3M1297A

: Is the resistance more than 1 MΩ?: Go to step 8G6.: Repair short circuit in harness between


8G6 : PREPARE OSCILLOSCOPE.

: Do you have oscilloscope?: Go to step 8G10.: Go to step 8G7.

8G7 : PREPARE SUBARU SELECT MONI-TOR.


: Go to step 8G9.: Go to step 8G8.

49

[T8G7] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8G8 : CHECK INPUT SIGNAL FOR TCM.

1) Connect connectors to TCM and transmission.2) Lift-up or raise the vehicle and place safetystands.

CAUTION:Raise all wheels off floor.





B3M1299A

: Is the voltage more than AC 1 V?: Even if “AT OIL TEMP” lights up, the

circuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin the TCM and transmission.

: Go to step 8G11.

8G9 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR.

1) Connect connectors to TCM and transmission.2) Connect Subaru Select Monitor to data linkconnector.

S2M0258

3) Lift-up or raise the vehicle and place safetystands.


4) Turn ignition switch to ON and turn SubaruSelect Monitor switch to ON.5) Start the engine.6) Read data of vehicle speed using SubaruSelect Monitor.� Compare speedometer with Subaru SelectMonitor indications.� Vehicle speed is indicated in “km/h” or “MPH”.7) Slowly increase vehicle speed to 20 km/h or 12MPH.


: Is the revolution value same as thetachometer reading shown on thecombination meter?


: Go to step 8G11.

50

3-2 [T8G8] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8G10 : CHECK INPUT SIGNAL FOR TCMUSING OSCILLOSCOPE.

1) Connect connectors to TCM and transmission.2) Lift-up or raise the vehicle and place safetystands.


3) Set oscilloscope to TCM connector terminals.Position prove; (B55) No. 12Earth lead; (B55) No. 21

H3M1973A



5) Measure signal voltage indicated on oscillo-scope.

B3M0244A

: Is the signal voltage more than AC 1V?


: Go to step 8G11.

8G11 : CHECK POOR CONTACT.

: Is there poor contact in vehicle speedsensor 1 circuit?


51

[T8G11] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

H: TROUBLE CODE 38 — TORQUE CONTROL SIGNAL —DIAGNOSIS:� The signal circuit is open or shorted.TROUBLE SYMPTOM:Excessive shift shock.WIRING DIAGRAM:

S3M0210

8H1 : CHECK HARNESS CONNECTORBETWEEN TCM AND ECM.



H3M1788A

: Is the resistance less than 1 Ω?: Go to step 8H2.: Repair open circuit in harness between



Measure resistance of harness between TCM andECM connector.


H3M1789A

: Is the resistance less than 1 Ω?: Go to step 8H3.: Repair open circuit in harness between


52

3-2 [T8H0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code




B3M1334A

: Is the resistance more than 1 MΩ?: Go to step 8H4.: Repair short circuit in harness between





B3M1354A

: Is the resistance more than 1 MΩ?: Go to step 8H5.: Repair short circuit in harness between


8H5 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM.

1) Connect connectors to TCM and ECM.2) Turn ignition switch to ON (engine OFF).3) Measure voltage between TCM connector ter-minals.

Connector & terminal(B54) No. 21 (+) — (B55) No. 19:

B3M1335A

: Is the voltage more than 9 V?: Even if “AT OIL TEMP” lights up, the


: Go to step 8H6.

53

[T8H5] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8H6 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM.

Measure voltage between TCM connector termi-nals.

Connector & terminal(B54) No. 13 (+) — (B55) No. 19 (–):

B3M1355A

: Is the voltage between 4 and 6 V?: Even if “AT OIL TEMP” lights up, the


: Go to step 8H7.

8H7 : CHECK POOR CONTACT.

: Is there poor contact in torque con-trol signal circuit?

: Repair poor contact.: Go to step 8H8.

8H8 : CONFIRM TROUBLE CODE 38.

: Replace ECM with a new one. Doesthe trouble code appear again, afterthe memory has been cleared?

: Replace TCM. : Replace ECM.

54

3-2 [T8H6] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

MEMO:

55

[T8H8] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

I: TROUBLE CODE 45 — INTAKE MANIFOLD PRESSURE SIGNAL —DIAGNOSIS:Input signal circuit of TCM from ECM is open or shorted.TROUBLE SYMPTOM:Excessive shift shock.WIRING DIAGRAM:

B3M1244

8I1 : CHECK HARNESS CONNECTORBETWEEN TCM AND ECM.



B3M1241A

: Is the resistance less than 1 Ω?: Go to step 8I2.: Repair open circuit in harness between


8I2 : CHECK HARNESS CONNECTORBETWEEN TCM AND ECM.



B3M1243A

: Is the resistance more than 1 MΩ?: Go to step 8I3.: Repair short circuit in harness between


56

3-2 [T8I0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8I3 : PREPARE SUBARU SELECT MONI-TOR.


: Go to step 8I5.: Go to step 8I4.

8I4 : CHECK INPUT SIGNAL FOR TCM.

1) Connect connectors to TCM and ECM.2) Start the engine, and warm-up the transmissionuntil ATF temperature is above 80°C (176°F).


3) Engine idling.4) Measure voltage between TCM connectors.


B3M1246A



: Go to step 8I6.

8I5 : CHECK INPUT SIGNAL FOR TCMUSING SUBARU SELECT MONITOR.

1) Connect connectors to TCM and ECM.2) Turn ignition switch to OFF.3) Connect Subaru Select Monitor to data linkconnector.

S2M0258

4) Start the engine, and turn Subaru Select moni-tor switch to ON.5) Warm-up the engine until engine coolant tem-perature is above 80°C (176°F).6) Engine idling.7) Read data of intake manifold pressure signalusing Subaru Select Monitor.� Display shows intake manifold pressure signalvalue sent from ECM.

: Is the value between 1.2 and 1.8 V?: Even if “AT OIL TEMP” lights up, the


: Go to step 8I6.

8I6 : CHECK POOR CONTACT.

: Is there poor contact in intake mani-fold pressure signal circuit?


57

[T8I6] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

J: TROUBLE CODE 71 — SHIFT SOLENOID 1 —DIAGNOSIS:Output signal circuit of shift solenoid 1 is open or shorted.TROUBLE SYMPTOM:Does not shift.WIRING DIAGRAM:

B2M2226

8J1 : CHECK SHIFT SOLENOID 1 GROUNDLINE.

1) Turn ignition switch to OFF.2) Disconnect connector from transmission.3) Measure resistance between transmission con-nector and transmission ground.


B3M1198A

: Is the resistance less than 1 Ω?: Go to step 8J2.: Repair open circuit in transmission har-

ness.

8J2 : CHECK SHIFT SOLENOID 1.

Measure resistance between transmission connec-tor and transmission ground.


B3M1234A

: Is the resistance between 10 and 16Ω?

: Go to step 8J3.: Go to step 8J6.

58

3-2 [T8J0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8J3 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.

1) Disconnect connector from TCM.2) Measure resistance of harness between TCMand shift solenoid 1 connector.


B3M1227A

: Is the resistance less than 1 Ω?: Go to step 8J4.: Repair open circuit in harness between


8J4 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.



B3M1229A

: Is the resistance more than 1 MΩ?: Go to step 8J5.: Repair short circuit in harness between


8J5 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM.

1) Connect connectors to TCM and transmission.2) Lift-up or raise the vehicle and support withsafety stand.


3) Start the engine and warm-up the transmissionuntil ATF temperature is above 80°C (176°F).


4) Move selector lever to “D”, and slowly increasevehicle speed to 50 km/h (31 MPH).


5) Measure voltage between TCM connector andchassis ground.


H3M1953A

: Is the voltage 1 V → 9 V?: Even if “AT OIL TEMP” lights up, the

circuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin the TCM.

: Go to step 8J8.

59

[T8J5] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8J6 : CHECK SHIFT SOLENOID 1 (INTRANSMISSION).

1) Remove transmission connector from bracket.2) Lift-up or raise the vehicle and support withsafety stand.




4) Remove oil pan, and disconnect connectorfrom shift solenoid 1.5) Measure resistance between shift solenoid 1connector and transmission ground.

TerminalNo. 1 — Transmission ground:

B3M1232


: Go to step 8J7.: Replace shift solenoid 1.

8J7 : CHECK HARNESS CONNECTORBETWEEN SHIFT SOLENOID 1 ANDTRANSMISSION.

Measure resistance of harness between shift sole-noid 1 and transmission connector.

Connector & terminal(AT5) No. 1 — (T4) No. 1:

B3M1233A

: Is the resistance less than 1 Ω?: Go to step 8J8.: Repair open circuit in harness between

shift solenoid 1 and transmission con-nector.

8J8 : CHECK POOR CONTACT.

: Is there poor contact in shift solenoid1 circuit?


60

3-2 [T8J6] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

MEMO:

61

[T8J8] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

K: TROUBLE CODE 72 — SHIFT SOLENOID 2 —DIAGNOSIS:Output signal circuit of shift solenoid 2 is open or shorted.TROUBLE SYMPTOM:Does not shift.WIRING DIAGRAM:

B2M2098

8K1 : CHECK SHIFT SOLENOID 2 GROUNDLINE.



B3M1198A

: Is the resistance less than 1 Ω?: Go to step 8K2.: Repair open circuit in transmission har-

ness.

8K2 : CHECK SHIFT SOLENOID 2.



B3M1240A


: Go to step 8K3.: Go to step 8K6.

62

3-2 [T8K0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8K3 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.



B3M1236A

: Is the resistance less than 1 Ω?: Go to step 8K4.: Repair open circuit in harness between


8K4 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.



B3M1237A

: Is the resistance more than 1 MΩ?: Go to step 8K5.: Repair short circuit in harness between


8K5 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM.



3) Start the engine, and warm-up the transmissionuntil ATF temperature is above 80°C (176°F).






H3M1954A

: Is the voltage 9 V → 1 V?: Even if “AT OIL TEMP” lights up, the


: Go to step 8K8.

63

[T8K5] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8K6 : CHECK SHIFT SOLENOID 2 (INTRANSMISSION).

1) Remove transmission connector from bracket.2) Drain automatic transmission fluid.


3) Remove oil pan, and disconnect connectorfrom shift solenoid 2.4) Measure resistance between shift solenoid 2connector and transmission ground.

Connector & terminalNo. 1 — Transmission ground:

B3M1232


: Go to step 8K7.: Replace shift solenoid assembly.

8K7 : CHECK HARNESS CONNECTORBETWEEN SHIFT SOLENOID 2 ANDTRANSMISSION.

Measure resistance of harness between shift sole-noid 2 and transmission connector.


B3M1239A

: Is the resistance less than 1 Ω?: Go to step 8K8.: Repair open circuit in harness between

shift solenoid 2 and transmission con-nector.

8K8 : CHECK POOR CONTACT.

: Is there poor contact in shift solenoid2 circuit?


64

3-2 [T8K6] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

MEMO:

65

[T8K8] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

L: TROUBLE CODE 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:

S3M0452

8L1 : CHECK LOW CLUTCH TIMING SOLE-NOID GROUND LINE.



B3M1198A

: Is the resistance less than 1 Ω?: Go to step 8L2.: Repair open circuit in transmission har-

ness.

8L2 : CHECK LOW CLUTCH TIMING SOLE-NOID.



B3M1264A


: Go to step 8L3.: Go to step 8L7.

66

3-2 [T8L0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8L3 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.



B3M1260A

: Is the resistance less than 1 Ω?: Go to step 8L4.: Repair open circuit in harness between


8L4 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.



B3M1261A

: Is the resistance more than 1 MΩ?: Go to step 8L5.: Repair short circuit in harness between


8L5 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM.





4) Move selector lever to “2”, and slowly increasevehicle speed to 35 km/h (22 MPH).




H3M1955A

: Is the voltage less than 1 V?: Go to step 8L6.: Go to step 8L9.

67

[T8L5] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8L6 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM.





H3M1955A



: Go to step 8L9.

8L7 : CHECK LOW CLUTCH TIMING SOLE-NOID (IN TRANSMISSION).





4) Remove oil pan, and disconnect connectorfrom low clutch timing solenoid.5) Measure resistance between low clutch timingsolenoid connector and transmission ground.


B3M1232


: Go to step 8L8.: Replace low clutch timing solenoid.

68

3-2 [T8L6] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8L8 : CHECK HARNESS CONNECTORBETWEEN LOW CLUTCH TIMINGSOLENOID AND TRANSMISSION.

Measure resistance of harness between low clutchtiming solenoid and transmission connector.


B3M1263A

: Is the resistance less than 1 Ω?: Go to step 8L9.: Repair open circuit in harness between

low clutch timing solenoid and transmis-sion connector.

8L9 : CHECK POOR CONTACT.

: Is there poor contact in low clutchtiming solenoid circuit?


69

[T8L9] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

M: TROUBLE CODE 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:

B3M1272

8M1 : CHECK 2-4 BRAKE TIMING SOLE-NOID GROUND LINE.



B3M1198A

: Is the resistance less than 1 Ω?: Go to step 8M2.: Repair open circuit in transmission har-

ness.

8M2 : CHECK 2-4 BRAKE TIMING SOLE-NOID.



B3M1279A


: Go to step 8M3.: Go to step 8M7.

70

3-2 [T8M0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8M3 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.



B3M1274A

: Is the resistance less than 1 Ω?: Go to step 8M4.: Repair open circuit in harness between


8M4 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.



B3M1275A

: Is the resistance more than 1 MΩ?: Go to step 8M5.: Repair short circuit in harness between


8M5 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM.





4) Move selector lever to “1”, and slowly increasevehicle speed to 10 km/h (6 MPH).




H3M1956A

: Is the voltage less than 1 V?: Go to step 8M6.: Go to step 8M9.

71

[T8M5] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8M6 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM.





H3M1956A



: Go to step 8M9.

8M7 : CHECK 2-4 BRAKE TIMING SOLE-NOID (IN TRANSMISSION).





4) Remove oil pan, and disconnect connectorfrom 2-4 brake timing solenoid.5) Measure resistance between 2-4 brake timingsolenoid connector and transmission ground.


B3M1232


: Go to step 8M8.: Replace 2-4 brake timing solenoid.

72

3-2 [T8M6] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8M8 : CHECK HARNESS CONNECTORBETWEEN 2-4 BRAKE TIMING SOLE-NOID AND TRANSMISSION.

Measure resistance of harness between 2-4 braketiming solenoid and transmission connector.


B3M1278A

: Is the resistance less than 1 Ω?: Go to step 8M9.: Repair open circuit in harness between

2-4 brake timing solenoid and transmis-sion connector.

8M9 : CHECK POOR CONTACT.

: Is there poor contact in 2-4 brake tim-ing solenoid circuit?


73

[T8M9] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

N: TROUBLE CODE 75 — LINE PRESSURE DUTY SOLENOID —DIAGNOSIS:Output signal circuit of line pressure duty solenoid or resistor is open or shorted.TROUBLE SYMPTOM:Excessive shift shock.WIRING DIAGRAM:

H3M1974

8N1 : CHECK RESISTOR.

1) Turn ignition switch to OFF.2) Disconnect connector from dropping resistor.3) Measure resistance between dropping resistorterminal.


B3M1280


: Go to step 8N2.: Replace dropping resistor.

8N2 : CHECK HARNESS CONNECTORBETWEEN TCM AND DROPPINGRESISTOR.

1) Disconnect connector from TCM.2) Measure resistance of harness between TCMconnector and dropping resistor connector.


B3M1281A

: Is the resistance less than 1 Ω?: Go to step 8N3.: Repair open circuit in harness between

TCM and dropping resistor connector.

74

3-2 [T8N0] DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8N3 : CHECK HARNESS CONNECTORBETWEEN TCM AND DROPPINGRESISTOR.

Measure resistance of harness between droppingresistor connector and chassis ground.


B3M1282A

: Is the resistance more than 1 MΩ?: Go to step 8N4.: Repair short circuit in harness between

TCM and dropping resistor connector.

8N4 : CHECK HARNESS CONNECTORBETWEEN TRANSMISSION ANDDROPPING RESISTOR.

1) Disconnect connector from transmission.2) Measure resistance of harness between trans-mission and dropping resistor connector.


B3M1283A


dropping resistor and transmission con-nector.

8N5 : CHECK HARNESS CONNECTORBETWEEN TRANSMISSION ANDDROPPING RESISTOR.

Measure resistance of harness between droppingresistor connector and chassis ground.


B3M1284A


dropping resistor and transmission con-nector.

8N6 : CHECK LINE PRESSURE DUTYSOLENOID GROUND LINE.



B3M1198A

: Is the resistance less than 1 Ω?: Go to step 8N7.: Repair open circuit in transmission har-

ness.

75

[T8N6] 3-2DIAGNOSTICS8. Diagnostic Chart with Trouble Code

8N7 : CHECK LINE PRESSURE DUTYSOLENOID.


Terminal(T4) No. 5 — Transmission ground:

B3M1292A

: Is the resistance between 2.0 and 4.5Ω?

: Go to step 8N8.: Go to step 8N17.

8N8 : CHECK HARNESS CONNECTORBETWEEN TCM AND TRANSMIS-SION.



B3M1286A



8N9 : CHECK HARNESS CONNECTORBETWEEN TCM AND CHASSISGROUND.



B3M1287A



8N10 : PREPARE SUBARU SELECT MONI-TOR.



76


8N11 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM.

1) Connect all connectors.2) Start the engine and warm-up the transmissionuntil ATF temperature is above 80°C (176°F).


3) Turn ignition switch to ON (engine OFF).4) Move selector lever to “N”.5) Measure voltage between TCM connector andchassis ground.


H3M1957A

: Is the voltage between 1.5 and 4.0 Vwith throttle fully closed?





H3M1957A

: Is the voltage less than 1 V withthrottle fully open?





H3M1958A

: Is the voltage more than 8.5 V withthrottle fully closed?


77





H3M1958A

: Is the voltage less than 1 V withthrottle fully open?

: Even if “AT OIL TEMP” lights up, thecircuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin TCM.

: Go to step 8N19.

8N15 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM USING SUBARUSELECT MONITOR.

1) Connect connectors to TCM and transmission.2) Connect Subaru Select Monitor to data linkconnector.

S2M0258

3) Start the engine, and turn Subaru Select Moni-tor switch to ON.4) Warm-up the transmission until ATF tempera-ture is above 80°C (176°F).


5) Stop the engine and turn ignition switch to ON(engine OFF).6) Move selector lever to “N”.7) Read data of line pressure duty solenoid usingSubaru Select Monitor.� Line pressure duty solenoid is indicated in “%”.8) Throttle is fully closed.

: Is the value 100%?: Go to step 8N16.: Go to step 8N19.

8N16 : CHECK OUTPUT SIGNAL EMITTEDFROM TCM USING SUBARUSELECT MONITOR.

1) Turn ignition switch to ON (Engine OFF).2) Throttle is fully open.

: Is the value between 10 and 20%?: Even if “AT OIL TEMP” lights up, the

circuit has returned to a normal condi-tion at this time. A temporary poor con-tact of the connector or harness may bethe cause. Repair harness or connectorin TCM.

: Go to step 8N19.

78


8N17 : CHECK LINE PRESSURE DUTYSOLENOID (IN TRANSMISSION).

1) Remove transmission connector from bracket.2) Drain automatic transmission fluid.


3) Remove oil pan, and disconnect connectorfrom line pressure duty solenoid.4) Measure resistance between line pressure dutysolenoid connector and transmission ground.


B3M1232

: Is the resistance between 2.0 and 4.5Ω?

: Go to step 8N18.: Replace line pressure duty solenoid.

8N18 : CHECK HARNESS CONNECTORBETWEEN TRANSMISSION ANDLINE PRESSURE DUTY SOLENOID.

Measure resistance of harness between line pres-sure duty solenoid and transmission connector.


B3M1291A


line pressure duty solenoid and trans-mission connector.

8N19 : CHECK POOR CONTACT.

: Is there poor contact in line pressureduty solenoid circuit?


79


O: TROUBLE CODE 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:

H3M1975

8O1 : CHECK RESISTOR.

1) Turn ignition switch to OFF.2) Disconnect connector from dropping resistor.3) Measure resistance between dropping resistorterminal.


B3M1302


automatic transmission and differential 3-2...feb 13, 2013 · torque control signal 1 b54 13 ......

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