1997 SUBARU LEGACY ignition

B3M0477A
1. CHECK HARNESS AND CONNECTOR BETWEEN
TCM AND ECM.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and ECM.
3) Measure resistance of harness connector between
TCM and ECM.
Connector & terminal / Specified resistance:
(B54) No. 5—(B84) No. 64 / 1Ω, or less
OBD0410A
4) Measure resistance of harness connector between
TCM and body to make sure that circuit does not short.
Connector & terminal / Specified resistance:
(B54) No. 5—Body/1MΩ, or more
OBD0406A
2. CHECK INPUT SIGNAL FOR TCM.
1) Connect connectors to ECM and TCM.
2) Turn ignition switch ON (with engine OFF).
3) Measure signal voltage for TCM.
Connector & terminal / Specified voltage:
(B54) No. 5—Body / 10.5 V, or more
OBD0145A

Using Subaru select monitor:
(1) Connect connectors to ECM and TCM.
(2) Turn ignition switch to OFF.
(3) Connect the Subaru select monitor to data link con-
nector.
(4) Turn ignition switch to ON and Subaru select moni-
tor switch to ON.
G3M0727
(5) Start and warm-up the engine.
(6) Operate at constant engine speed.
(7) Read data on Subaru select monitor.
(8) Designate mode using function key.
Function mode: F06
SPECIFIED DATA:
Same as tachometer reading (in combination
meter)
36
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

B3M0230B
1. CHECK HARNESS AND CONNECTORS BETWEEN
TCM AND DUTY SOLENOID C.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and transmission.
3) Measure resistance of harness connector between
TCM and transmission.
Connector & terminal / Specified resistance:
(B55) No. 3—(B11) No. 11 / 1Ω, or less
B3M0231B
4) Measure resistance of harness connector between
TCM and body to make sure that circuit does not short.
Connector & terminal / Specified resistance:
(B55) No. 3—Body/1MΩ, or more
G3M0109
2. CHECK DUTY SOLENOID C’s GROUND LINE.
Measure resistance between transmission connector
receptacle and transmission case.
Connector & terminal / Specified resistance:
(T4) No. 4—Transmission / 1Ω, or less
G3M0132
3. CHECK DUTY SOLENOID C.
Measure resistance between transmission connector
receptacle’s terminals.
Connector & terminal / Specified resistance:
(T4) No. 11—No.4/9—17Ω
38
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

B3M0478A
1. CHECK HARNESS CONNECTOR BETWEEN TCM
AND ECM.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and ECM.
3) Measure resistance of harness connector between
TCM and ECM.
Connector & terminal / Specified resistance:
(B55) No. 16—(B84) No. 79 / 1Ω, or less
B3M0235B
4) Measure resistance of harness connector between
TCM and body to make sure that circuit does not short.
Connector & terminal / Specified resistance:
(B55) No. 16—Body/1MΩ, or more
B3M0233B
2. CHECK OUTPUT SIGNAL FOR TCM.
1) Connect connectors to TCM and ECM.
2) Turn ignition switch to ON.
3) Measure signal voltage between TCM connector termi-
nal and body.
Connector & terminal / Specified voltage:
(B55) No. 16—Body / 5±1 V
40
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

OBD0507A
1. CHECK HARNESS CONNECTOR BETWEEN TCM
AND THROTTLE POSITION SENSOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from TCM and throttle position
sensor.
3) Measure resistance of harness connector between
TCM and throttle position sensor.
Connector & terminal / Specified resistance:
(B54) No. 8—(E13) No.2/1Ω, or less
(B56) No. 19—(E13) No.3/1Ω, or less
B3M0382A
4) Measure resistance of harness connector between
TCM and body to make sure that circuit does not short.
Connector & terminal / Specified resistance:
(B54) No. 8—Body/1MΩ, or more
(B56) No. 19—Body/1MΩ, or more
OBD0510A
2. CHECK THROTTLE POSITION SENSOR.
Measure resistance between throttle position sensor termi-
nals.
Terminals / Specified resistance:
(E13) No. 1—No. 2 / 0.3—0.7 kΩ
(Throttle fully closed.)
3—6kΩ
(Throttle fully open.)
(E13) No. 1—No. 3 / 3.5—6.5 kΩ
OBD0503A
3. CHECK INPUT SIGNAL FOR TCM.
1) Connect connectors to TCM and throttle position sen-
sor.
2) Turn ignition switch ON (with engine OFF).
3) Measure signal voltage input emitted from throttle posi-
tion sensor with accelerator pedal fully depressed.
Connector & terminal / Specified voltage:
(B54) No. 8—No.7/
0.5±0.2 V (Throttle fully closed.)
4.6±0.3 V (Throttle fully open.)
OBD0145A

Using Subaru select monitor:
(1) Connect connectors to TCM and throttle position
sensor.
(2) Turn ignition switch to OFF.
(3) Connect the Subaru select monitor to data link con-
nector.
(4) Turn ignition switch to ON and Subaru select moni-
tor switch to ON.
42
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

B3M0383
(5) Designate mode using function key.
(6) Read data on Subaru select monitor.
Function mode: F09
SPECIFIED DATA:
0.5±0.2 V (Throttle fully closed.)
4.6±0.3 V (Throttle fully open.)
[Must be changed correspondingly with accelera-
tor pedal operation (from“released”to
“depressed”position).]
B3M0238A
4. CHECK POWER SUPPLY TO THROTTLE POSITION
SENSOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from throttle position sensor.
3) Turn ignition switch to ON.
4) Measure power supply voltage to throttle position sen-
sor.
Connector & terminal / Specified voltage:
(E13) No. 1—Body / 5.12±0.1 V
OBD0145A

Using Subaru select monitor:
(1) Turn ignition switch to OFF.
(2) Connect the Subaru select monitor to data link con-
nector.
(3) Turn ignition switch to ON and Subaru select moni-
tor switch to ON.
OBD0506
(4) Designate mode using function key.
(5) Read data on Subaru select monitor.
Function mode: F14
SPECIFIED DATA:
5.12±0.1 V
43
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

OBD0400A
1. CHECK HARNESS CONNECTOR BETWEEN TCM
AND VEHICLE SPEED SENSOR 1.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and transmission.
3) Measure resistance of harness connector between
TCM and transmission connector.
Connector & terminal / Specified resistance:
(B54) No. 12—(B11) No. 16 / 1Ω, or less
(B54) No. 7—(B11)No.9/1Ω, or less
OBD0401A
4) Measure resistance of harness connector between
TCM and body to make sure that circuit does not short.
Connector & terminal / Specified resistance:
(B54) No. 7—Body/1MΩ, or more
(B54) No. 12—Body/1MΩ, or more
G3M0140
2. CHECK VEHICLE SPEED SENSOR 1.
1) Measure resistance between transmission connector
receptacle’s terminals.
Connector & terminal / Specified resistance:
(T4) No. 16—No. 9 / 450—720Ω
OBD0403A
2) Measure resistance of harness connector between
transmission connector and transmission case to make
sure that circuit does not short.
Connector & terminal / Specified resistance:
(T4) No. 16—Transmission / 1 MΩ, or more
(T4) No. 9—Transmission / 1 MΩ, or more
45
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

OBD0396A
3. CHECK INPUT SIGNAL FOR TCM.
1) Connect connectors to TCM and transmission.
2) Lift-up or raise the vehicle and place safety stands.
CAUTION:
On AWD models, raise all wheels off floor.
3) Push the TCS OFF switch to ON. (With TCS models)
4) Start the engine and set vehicle in 20 km/h (12 MPH)
condition.
5) Measure voltage between TCM connector terminals.
Connector & terminal / Specified voltage:
(B54) No. 12—No. 7 / AC 1 V, or more
NOTE:
The speed difference between front and rear wheels may
light either the ABS or the ABS/TCS warning light, but this
indicates no malfunctions. When AT control diagnosis is
finished, perform the ABS or the ABS/TCS memory clear-
ance procedure of self-diagnosis system.
or 4-4d [T6D2] or [T9J0].>
OBD0145A
B3M0413
OBD0399

Using Subaru select monitor:
(1) Connect connectors to TCM and transmission.
(2) Turn ignition switch to OFF.
(3) Connect the Subaru select monitor to data link con-
nector.
(4) Lift-up or raise the vehicle and place safety stands.
CAUTION:
On AWD models, raise all wheels off floor.
(5) Turn ignition switch to ON and Subaru select moni-
tor switch to ON.
(6) Push the TCS OFF switch to ON. (With TCS mod-
els)
(7) Start the engine and operate at constant speed.
(8) Read data on Subaru select monitor.
(9) Designate mode using function key.
Function mode: F02 or F03
SPECIFIED DATA:
F02: Compare speedometer with monitor indica-
tions.
F03: Compare speedometer with monitor indica-
tions.

F02: Vehicle speed is indicated in“m/h”.

F03: Vehicle speed is indicated in“km/h”.
NOTE:
The speed difference between front and rear wheels may
light either the ABS or the ABS/TCS warning light, but this
indicates no malfunctions. When AT control diagnosis is
finished, perform the ABS or the ABS/TCS memory clear-
ance procedure of self-diagnosis system.
or 4-4d [T6D2] or [T9J0].>
46
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

1. CHECK OPERATION OF SPEEDOMETER.
Make sure that speedometer indicates the vehicle speed
by driving the vehicle.
B3M0250
2. CHECK HARNESS CONNECTOR BETWEEN TCM
AND COMBINATION METER.
1) Turn ignition switch to OFF.
2) Remove combination meter.
B3M0251B
3) Disconnect connectors from TCM.
4) Measure resistance of harness connector between
TCM and combination meter.
Connector & terminal / Specified resistance:
(B56) No. 11—(i10) No. 10 / 1Ω, or less
B3M0414A
5) Measure resistance of harness connector between
combination meter and body to make sure that circuit does
not short.
Connector & terminal / Specified resistance:
(i10) No. 10—Body/1MΩ, or more
49
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code