Subaru Legacy 2002 Service Manual page 1895

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
Automatic Transmission (Diagnostics)
No.
39 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:
(B55) No. 14 — (i11) No. 3:
3.0 L model:
(B55) No. 14 — (i10) No. 21:
40 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. 14 — Chassis ground:
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:
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) Measure voltage between TCM and chas-
sis ground.
Connector & terminal
(B55) No. 4 (+) — Chassis ground (–):
43 CHECK INPUT SIGNAL FOR TCM.
Measure voltage between TCM and chassis
ground.
Connector & terminal
(B55) No. 4 (+) — Chassis ground (–):
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.
Step
Is the resistance more than
1 Ω?
Is the resistance more than
1 MΩ?
Is the resistance less than
1 Ω?
Is the voltage less than 1 V
in "D" range?
Is the voltage more than 8
V in other ranges?
Is "D" range indicator light
bulb OK?
AT-126
Check Yes
Go to step 65.
Go to step 41.
Go to step 42.
Go to step 43.
Go to step 65.
Go to step 45.
No
Repair open cir-
cuit in harness
between inhibitor
switch connector
and combination
meter.
Repair ground
short circuit in "N"
range circuit.
Repair open cir-
cuit in harness
between TCM and
inhibitor switch
connector, and
poor contact in
coupling connec-
tor.
Go to step 65.
Replace TCM.
<Ref. to AT-49,
Transmission
Control Module
(TCM).>
Replace "D" range
indicator light
bulb. <Ref. to IDI-
15, Combination
Meter Assembly.>