Subaru Legacy 2003 Service Manual page 2415

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
51 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. 5 — (i11) No. 11:
3.0 L model and TURBO model:
(B55) No. 5 — (i10) No. 19:
Does the measured value exceed the spec-
ified value?
52 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. 5 — Chassis ground:
Does the measured value exceed the spec-
ified value?
53 CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1) Turn ignition switch to OFF.
2) Disconnect connector from TCM and inhibi-
tor switch.
3) Measure resistance of harness between
TCM and inhibitor switch connector.
Connector & terminal
(B55) No. 6 — (T7) No. 4:
Is the measured value less than the speci-
fied value?
54 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 2 range.
5) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 6 (+) — Chassis ground (–):
Is the measured value less than the speci-
fied value?
55 CHECK INPUT SIGNAL FOR TCM.
1) Position select lever to any other than 2
range.
2) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 6 (+) — Chassis ground (–):
Does the measured value exceed the spec-
ified value?
Step Value
1 Ω
1 MΩ
1 Ω
1 V
8 V
AT-140
Yes
Go to step 65. Repair open circuit
in harness
between TCM
connector and
combination
meter, and poor
contact in TCM
connector.
Go to step 53. Repair ground
short circuit in "3"
range circuit.
Go to step 54. Repair open circuit
in harness
between TCM and
inhibitor switch
connector, and
poor contact in
coupling connec-
tor.
Go to step 55. Go to step 65.
Go to step 65. Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
No