Subaru Legacy 2002 Service Manual page 1860

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
2 CHECK HARNESS CONNECTOR
BETWEEN TCM AND TRANSMISSION.
1) Turn ignition switch to OFF.
2) Disconnect connector from TCM and trans-
mission.
3) Measure 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 resistance of harness connector
between TCM and chassis ground.
Connector & terminal
(B54) No. 7 — Chassis ground:
4 CHECK LOCK-UP DUTY SOLENOID.
Measure 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 connectors to TCM and transmis-
sion.
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 the ATF reaches its
operating temperature.
4) Move selector lever to "D" 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
diagnosis is finished, perform the ABS
memory clearance procedure of on-board
diagnostics system. <Ref. to ABS-21, Clear
Memory Mode.>
5) Measure voltage between TCM connector
and chassis ground.
Connector & terminal
(B54) No. 7 (+) — Chassis ground (−):
Step
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?
AT-91
Automatic Transmission (Diagnostics)
Check Yes
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 8.
Go to step 7.
No
Repair open cir-
cuit in harness
between TCM and
transmission con-
nector.
Repair short cir-
cuit in harness
between TCM and
transmission con-
nector.
Go to step 11.
Go to step 6.
Go to step 10.