Subaru 2002 IMPREZA Service Manual page 1656

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
I: DTC 71 SHIFT SOLENOID 1
DIAGNOSIS:
The output signal circuit of shift solenoid 1 is open or shorted.
TROUBLE SYMPTOM:
Does not shift.
WIRING DIAGRAM:
B11
1 2 3 4 1 2 3 4
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 shift solenoid 1 connector.
Connector & terminal
(B54) No. 22 — (B11) No. 1:
B54
5 6 7 8 9
13 14 15 16 17 18
22 23 24
B54 TCM
B11
T4
AT5
TRANSMISSION
Check
Is the resistance less than 1
Ω?
AT-70
Yes
Go to step 2. Repair the open
circuit in harness
between TCM and
transmission con-
nector.
TR0410
No