Subaru Legacy 2003 Service Manual page 2404

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK POWER SWITCH OPERATION.
When power switch is turned OFF, does LED
light up?
2 CHECK POWER SWITCH OPERATION.
When power switch is turned ON, does LED
light up?
3 CHECK POWER INDICATOR LIGHT.
1) Turn ignition switch to OFF.
2) Remove combination meter.
3) Remove POWER indicator light bulb from
combination meter.
Is POWER indicator light bulb OK?
4 CHECK POWER SWITCH GROUND LINE.
1) Turn ignition switch to OFF.
2) Disconnect connector from power switch.
3) Measure resistance of harness connector
between power switch and chassis ground.
Connector & terminal
(B133) No. 4 — Chassis ground:
Is the measured value less than the speci-
fied value?
5 CHECK POWER SWITCH.
1) Power switch turned ON.
2) Measure resistance between terminals of
power switch.
Terminals
No. 3 — No. 4:
Is the measured value less than the speci-
fied value?
6 CHECK POWER SWITCH.
1) Power switch turned OFF.
2) Measure resistance between terminals of
power switch.
Terminals
No. 3 — No. 4:
Does the measured value exceed the spec-
ified value?
7 CHECK HARNESS CONNECTOR BETWEEN
TCM AND POWER SWITCH.
Measure resistance of harness connector
between TCM and power switch.
Connector & terminal
(B55) No. 23 — (B133) No. 3:
Is the measured value less than the specified
value?
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Value
LED lights up.
LED lights up.
Bulb is normal.
1 Ω
1 Ω
1 MΩ
1 Ω
AT-129
Yes
Go to step 5. Go to step 2.
Go to step CHECK Go to step 3.
INHIBITOR
SWITCH. <Ref. to
AT-132, CHECK
INHIBITOR
SWITCH., Diag-
nostic Procedure
for No-diagnostic
Trouble Code
(DTC).>
Go to step 4. Replace POWER
indicator light bulb.
<Ref. to IDI-14,
Combination
Meter Assembly.>
Go to step 5. Repair open circuit
in harness
between power
switch and chassis
ground.
Go to step 6. Repair power
switch.
Go to step 7. Repair power
switch.
Go to step 8. Repair open circuit
in harness
between TCM and
power switch con-
nector.
No