Subaru Legacy 2002 Service Manual page 1904

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
No.
10 CHECK INPUT SIGNAL FOR TCM.
1) Connect connectors to TCM and hold
switch.
2) Turn ignition switch ON (with engine OFF).
3) Measure signal voltage for TCM while turn-
ing hold switch OFF.
Connector & terminal
(B55) No. 16 (+) — Chassis ground (–):
11 CHECK INPUT SIGNAL FOR TCM.
Measure signal voltage for TCM while turning
hold switch ON.
Connector & terminal
(B55) No. 16 (+) — Chassis ground (–):
12 CHECK POOR CONTACT.
Step
Is the voltage more than 8
V?
Is the voltage less than 1
V?
Is there poor contact?
AT-135
Automatic Transmission (Diagnostics)
Check Yes
Go to step 11.
Go to step 12.
Repair poor con-
tact.
No
Replace TCM.
<Ref. to AT-49,
Transmission
Control Module
(TCM).>
Replace TCM.
<Ref. to AT-49,
Transmission
Control Module
(TCM).>
A temporary poor
contact of the
connector or har-
ness or connector
in hold switch cir-
cuit.