Subaru Impreza 2003 Service Manual page 1760

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Q: DTC 79 TRANSFER DUTY SOLENOID
DIAGNOSIS:
The output signal circuit of transfer duty solenoid is open or shorted.
TROUBLE SYMPTOM:
Excessive "braking" in tight corners.
WIRING DIAGRAM:
B11
1 2 3 4 1 2
5 6 7 8 10 11 12
9 10 11 12 19 20 21
13 14 15 16
17 18 19 20
Step
1 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. 6 — (B11) No. 6:
B54
3 4 5 6 7 8 9
13 14 15 16 17 18
22 23 24
B54 TCM
B11
T4
-
AT4
TRANSMISSION
Check
Is the resistance less than 1
Ω?
4AT-90
Yes
Go to step 2. Repair the open
circuit in harness
between TCM and
transmission con-
nector.
AT-00590
No