Subaru Impreza 2003 Service Manual page 1778

DIAGNOSTIC PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
9 CHECK INPUT SIGNAL FOR TCM.
1)Connect the connectors to TCM and
POWER switch.
2)Turn the ignition switch to ON (engine OFF).
3)Measure the signal voltage for TCM while
turning POWER switch to OFF.
Connector & terminal
(B55) No. 23 (+) — Chassis ground (–):
10 CHECK INPUT SIGNAL FOR TCM.
Measure the signal voltage for TCM while turn-
ing POWER switch to ON.
Connector & terminal
(B55) No. 23 (+) — Chassis ground (–):
11 CHECK POOR CONTACT.
Check
Is the voltage more than 10 V? Go to step 10.
Is the voltage less than 1 V?
Is there poor contact?
4AT-108
Yes
Replace the TCM.
<Ref. to 4AT-70,
Transmission Con-
trol Module
(TCM).>
Go to step 11. Replace the TCM.
<Ref. to 4AT-70,
Transmission Con-
trol Module
(TCM).>
Repair the poor A temporary poor
contact. contact of the con-
nector or harness
or connector in
POWER switch
circuit.
No