Subaru 2003 LEGACY Service Manual page 140

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
41 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. 4 — (T7) No. 3:
Is the measured value less than the speci-
fied value?
42 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 D range.
5) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 4 (+) — Chassis ground (–):
Is the measured value less than the speci-
fied value?
43 CHECK INPUT SIGNAL FOR TCM.
1) Position select lever to any other than D
range.
2) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 4 (+) — Chassis ground (–):
Does the measured value exceed the spec-
ified value?
44 CHECK "D" RANGE INDICATOR LIGHT
BULB.
1) Turn ignition switch to OFF.
2) Remove combination meter.
3) Remove "D" range indicator light bulb from
combination meter.
Is "D" range indicator light bulb OK?
45 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. 4 — (i11) No. 4:
3.0 L model and TURBO model:
(B55) No. 4 — (i10) No. 20:
Does the measured value exceed the spec-
ified value?
Step Value
1 Ω
1 V
8 V
Bulb is normal.
1 Ω
AT-138
Yes
Go to step 42. Repair open circuit
in harness
between TCM and
inhibitor switch
connector, and
poor contact in
coupling connec-
tor.
Go to step 43. Go to step 65.
Go to step 65. Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
Go to step 45. Replace "D" range
indicator light bulb.
<Ref. to IDI-14,
Combination
Meter Assembly.>
Go to step 65. Repair open circuit
in harness
between inhibitor
switch connector
and combination
meter.
No