Subaru Impreza 2003 Service Manual page 1793

DIAGNOSTIC PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
Step
10 CHECK INPUT SIGNAL FOR TCM.
1)Connect the connectors to TCM and HOLD
switch.
2)Turn the ignition switch to ON (engine OFF).
3)Measure the signal voltage for TCM while
turning HOLD switch to OFF.
Connector & terminal
(B55) No. 16 (+) — Chassis ground (–):
11 CHECK INPUT SIGNAL FOR TCM.
Measure the signal voltage for TCM while turn-
ing HOLD switch to ON.
Connector & terminal
(B55) No. 16 (+) — Chassis ground (–):
12 CHECK POOR CONTACT.
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the voltage more than 8 V?
Is the voltage less than 1 V?
Is there poor contact?
4AT-123
Yes
Go to step 11. Replace the TCM.
<Ref. to 4AT-70,
Transmission Con-
trol Module
(TCM).>
Go to step 12. 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
HOLD switch cir-
cuit.
No