Subaru Legacy 2003 Service Manual page 2417

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
61 CHECK INPUT SIGNAL FOR TCM.
1) Position select lever to any other than 1
range.
2) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 7 (+) — Chassis ground (–):
Does the measured value exceed the spec-
ified value?
62 CHECK "1" RANGE INDICATOR LIGHT
BULB.
1) Turn ignition switch to OFF.
2) Remove combination meter.
3) Remove "1" range indicator light bulb from
combination meter.
Is "1" range indicator light bulb OK?
63 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. 7 — (i11) No. 5:
3.0 L model and TURBO model:
(B55) No. 7 — (i10) No. 15:
Does the measured value exceed the spec-
ified value?
64 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. 7 — Chassis ground:
Does the measured value exceed the spec-
ified value?
65 CHECK POOR CONTACT.
Is there poor contact in inhibitor switch circuit?
Step Value
8 V
Bulb is normal.
1Ω
1 MΩ
There is poor contact.
AT-142
Yes
Go to step 65. Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
Go to step 63. Replace "1" range
indicator light bulb.
<Ref. to IDI-14,
Combination
Meter Assembly.>
Go to step 65. Repair open circuit
in harness
between TCM and
combination
meter, and poor
contact in TCM
connector.
Go to step 65. Repair ground
short circuit in "1"
range circuit.
Repair poor con- Adjust inhibitor
tact. switch and select
cable. <Ref. to AT-
50, ADJUST-
MENT, Inhibitor
Switch.> and
<Ref. to CS-12,
Select Cable.>
No