Subaru 2003 LEGACY Service Manual page 138

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
31 CHECK INPUT SIGNAL FOR TCM.
1) Position select lever to any other than R
range.
2) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 3 (+) — Chassis ground (–):
Does the measured value exceed the spec-
ified value?
32 CHECK "R" RANGE INDICATOR LIGHT
BULB.
1) Turn ignition switch to OFF.
2) Remove combination meter.
3) Remove "R" range indicator light bulb from
combination meter.
Is "R" range indicator light bulb OK?
33 CHECK HARNESS CONNECTOR BETWEEN
TCM AND COMBINATION METER.
1) Disconnect connectors from TCM and com-
bination meter.
2) Measure resistance of harness between
TCM and combination meter.
Connector & terminal
Except 3.0 L model and TURBO model:
(B55) No. 3 — (i11) No. 2:
3.0 L model and TURBO model:
(B55) No. 3 — (i10) No. 22:
Is the measured value less than the speci-
fied value?
34 CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM, inhibitor
switch and combination meter.
3) Measure resistance of harness between
TCM and chassis ground.
Connector & terminal
(B55) No. 3 — Chassis ground:
Does the measured value exceed the spec-
ified value?
35 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. 14 — (T7) No. 10:
Is the measured value less than the speci-
fied value?
Step Value
8 V
Bulb is normal.
1 Ω
1 MΩ
1 Ω
AT-136
Yes
Go to step 65. Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
Go to step 33. Replace "R" range
indicator light bulb.
<Ref. to IDI-14,
Combination
Meter Assembly.>
Go to step 65. Repair open circuit
in harness
between TCM
connector and
combination
meter, and poor
contact in TCM
connector.
Go to step 35. Repair ground
short circuit in "R"
range circuit.
Go to step 36. Repair open circuit
in harness
between TCM and
inhibitor switch
connector, and
poor contact in
coupling connec-
tor.
No