Subaru 2002 IMPREZA Service Manual page 1681

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from TCM and
transmission.
3)Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
(B54) No. 7 — (B11) No. 13:
3 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness connector
between TCM and chassis ground.
Connector & terminal
(B54) No. 7 — Chassis ground:
4 CHECK LOCK-UP DUTY SOLENOID.
Measure the resistance between transmission
connector receptacle's terminals.
Connector & terminal
(T4) No. 13 — No. 16:
5 PREPARE SUBARU SELECT MONITOR.
6 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1)Connect the connectors to TCM and trans-
mission.
2)Lift-up the vehicle and place safety stand.
NOTE:
On AWD models, raise all wheels off ground.
3)Start the engine and warm-up the transmis-
sion until ATF temperature is above 80°C
(176°F).
NOTE:
If ambient temperature is below 0°C (32°F),
drive the vehicle until ATF reaches its operating
temperature.
4)Move the selector lever to "D" range and
slowly increase vehicle speed to 75 km/h (47
MPH). Wheels will lock-up.
NOTE:
The speed difference between front and rear
wheels may light the ABS warning light, but this
indicates no malfunction. When AT control di-
agnosis is finished, perform the ABS memory
clearance procedure of on-board diagnostics
system. <Ref. to ABS-22, Clear Memory
Mode.>
5)Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
(B54) No. 7 (+) — Chassis ground ( − − − − ):
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance between 10
and 17 Ω?
Do you have a Subaru Select
Monitor?
Is the voltage more than 8.5 V? Go to step 7.
AT-95
Yes
Go to step 3. Repair the open
circuit in harness
between TCM and
transmission con-
nector.
Go to step 4. Repair the short
circuit in harness
between TCM and
transmission con-
nector.
Go to step 5. Go to step 11.
Go to step 8. Go to step 6.
Go to step 10.
No