Subaru 2003 LEGACY Service Manual page 34

DIAGNOSTIC PROCEDURE FOR POWER INDICATOR LIGHT
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
7 CHECK OPEN CIRCUIT OF HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect TCM and combination meter
connector.
3) Measure resistance of harness between
combination meter.
Connector & terminal
Except 3.0 L model and TURBO model
(B56) No. 11 — (i11) No. 6:
LHD: 3.0 L model
(B56) No. 11 — (i12) No. 12
RHD: 3.0 L and TURBO models
(B56) No. 11 — (i0) No. 13
Is the measured value less than the speci-
fied value?
8 CHECK INPUT SIGNAL FOR TCM.
1) Connect connector to TCM and combina-
tion meter.
2) Turn ignition switch to ON (engine OFF).
3) Measure voltage between TCM connector
and chassis ground.
Connector & terminal
(B56) No. 11 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
9 CHECK SUBARU SELECT MONITOR.
Do you have Subaru Select Monitor?
10 CHECK INHIBITOR SWITCH.
1) Connect Subaru Select Monitor to data link
connector.
2) Turn ignition switch to ON.
3) Subaru Select Monitor to ON.
4) Read data of range switch using Subaru
Select Monitor.
•Range switch is indicated in ON ⇔ OFF.
When each range is selected, does LED of
Subaru Select Monitor light up?
11 CHECK SHORT CIRCUIT OF HARNESS.
1) Disconnect connector from TCM.
2) Remove combination meter.
3) Disconnect connector from combination
meter.
4) Measure resistance of harness connector
between TCM and chassis ground.
Connector & terminal
(B56) No. 11 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
Step Value
1 Ω
1 V
Subaru Select Monitor is avail-
able.
LED lights up.
1 MΩ
AT-32
Yes
Go to step 8. Repair open circuit
in harness
between TCM and
combination
meter, and poor
contact in cou-
pling connector.
Even if POWER Replace TCM.
indicator lights up, <Ref. to AT-76,
the circuit has Transmission Con-
returned to a nor- trol Module
mal condition at (TCM).>
this time. A tempo-
rary poor contact
of the connector or
harness may be
the cause. Repair
harness or con-
nector in TCM.
Go to step 10. Go to step 11.
Go to step 11. Check inhibitor
switch circuit.
<Ref. to AT-132,
CHECK INHIBI-
TOR SWITCH.,
Diagnostic Proce-
dure for No-diag-
nostic Trouble
Code (DTC).>
Replace TCM. Repair short circuit
<Ref. to AT-76, in harness
Transmission Con- between combina-
trol Module tion meter connec-
(TCM).> tor and TCM
connector.
No