Subaru Legacy 2003 Service Manual page 2409

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
20 CHECK INDICATOR LIGHT.
Does combination meter "1" range indicator
illuminate?
21 CHECK "1" RANGE SWITCH.
When the "2" range is selected, does "1" range
LED light UP?
22 CHECK HARNESS CONNECTOR BETWEEN
INHIBITOR SWITCH AND CHASSIS
GROUND.
1) Turn ignition switch to OFF.
2) Disconnect connector from inhibitor switch.
3) Measure resistance of harness between
inhibitor switch and chassis ground.
Connector & terminal
(T7) No. 5 — Chassis ground:
Is the measured value less than the speci-
fied value?
23 CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and
inhibitor switch.
3) Measure resistance of harness between
TCM and inhibitor switch connector.
Connector & terminal
(B55) No. 1 — (T7) No. 9
Is the measured value less than the speci-
fied value?
24 CHECK INPUT SIGNAL FOR TCM.
1) Turn ignition switch to OFF.
2) Connect connector to TCM and inhibitor
switch.
3) Turn ignition switch to ON.
4) Move select lever to P range.
5) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 1 (+) — Chassis ground (–):
Is the measured value less than the speci-
fied value?
25 CHECK INPUT SIGNAL FOR TCM.
1) Position select lever to any other than P
range.
2) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 1 (+) — Chassis ground (–):
Does the measured value exceed the spec-
ified value?
Step Value
1 range indicator lights up.
LED lights up.
1 Ω
1 Ω
1 V
8 V
AT-134
Yes
Go to step 21. Go to step 62.
Go to step 64. Go to step CHECK
HOLD SWITCH.
<Ref. to AT-144,
CHECK HOLD
SWITCH., Diag-
nostic Procedure
for No-diagnostic
Trouble Code
(DTC).>
Go to step 23. Repair open circuit
in harness
between inhibitor
switch connector
and chassis
ground, and poor
contact in cou-
pling connector.
Go to step 24. Repair open circuit
in harness
between TCM and
inhibitor switch
connector, and
poor contact in
coupling connec-
tor.
Go to step 25. Go to step 65.
Go to step 65. Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
No