Subaru Legacy 2004 Service Manual page 2329

Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
9 CHECK INPUT SIGNAL FOR TCM.
Measure the signal voltage for TCM while
removing the fuse from FWD switch connector.
Connector & terminal
(B55) No. 17 (+) — Chassis ground (
10 CHECK BODY INTEGRATED UNIT.
Check DTC of body integrated unit.
11 CHECK COMBINATION METER.
Check the AWD warning light. <Ref. to IDI-3,
INSPECTION, Combination Meter System.>
12 CHECK POOR CONTACT.
Check
Is the voltage more than 10.5
V?
$
):
Is DTC of CAN communication
displayed?
Is the AWD warning light OK? Go to step 12.
Is there poor contact in FWD
switch circuit?
4AT(diag)-126
Yes
Go to step 10. Replace the TCM.
<Ref. to 4AT-65,
Transmission Con-
trol Module
(TCM).>
Perform the diag- Go to step 11.
nosis according to
DTC.
Replace the com-
bination meter
assembly. <Ref. to
IDI-16, Combina-
tion Meter Assem-
bly.>
Repair the poor Replace the TCM.
contact. <Ref. to 4AT-65,
Transmission Con-
trol Module
(TCM).>
No