Subaru Legacy 2002 Service Manual page 1802

DIAGNOSTIC PROCEDURE FOR POWER INDICATOR LIGHT
No.
1 CHECK IGNITION SWITCH.
2 CHECK GENERATOR.
1) Start the engine.
2) Idle the engine.
3) Measure voltage between generator and
chassis ground.
Terminal
Generator B terminal (+) — Chassis
ground (−):
3 CHECK BATTERY TERMINAL.
Turn ignition switch to OFF.
4 CHECK POWER SUPPLY OF TCM.
1) Disconnect connector from TCM.
2) Turn ignition switch to ON.
3) Measure voltage between TCM connector
and chassis ground.
Connector & terminal
(B56) No. 1 (+) — Chassis ground (−):
5 CHECK FUSE (NO. 4).
Remove fuse (No. 4).
6 CHECK IGNITION POWER SUPPLY CIR-
CUIT.
1) Turn ignition switch to ON (engine OFF).
2) Measure ignition power supply voltage
between TCM connector and chassis ground.
Connector & terminal
(B54) No. 23 (+) — Chassis ground (–):
(B54) No. 24 (+) — Chassis ground (–):
7 CHECK FUSE (NO. 11).
Remove fuse (No. 11).
8 CHECK HARNESS CONNECTOR
BETWEEN TCM AND TRANSMISSION.
1) Turn ignition switch to OFF.
2) Disconnect connector from TCM and trans-
mission.
3) Measure resistance of harness between
TCM and transmission connector.
Connector & terminal
(B56) No. 19 — (B11) No. 16
(B54) No. 21 — (B11) No. 16
Step
Is ignition switch ON?
Is the voltage between 10
and 15 V?
Is there poor contact at
battery terminal?
Is the voltage between 10
and 15 V?
Is the fuse (No. 4) blown
out?
Is the voltage more than 10
V?
Is the fuse (No. 11) blown
out?
Is the resistance less than
1 Ω?
AT-33
Automatic Transmission (Diagnostics)
Check Yes
Go to step 2.
Go to step 3.
Repair battery
terminal.
Go to step 6.
Replace fuse (No.
4). If replaced
fuse (No. 4) has
blown out easily,
repair short circuit
in harness
between fuse (No.
4) and TCM.
Go to step 8.
Replace fuse (No.
11). If replaced
fuse (No. 11) has
blown out easily,
repair short circuit
in harness
between fuse (No.
11) and TCM.
Go to step 9.
No
Turn ignition
switch ON.
Repair generator.
<Ref. to SC-13,
Generator.>
Go to step 4.
Go to step 5.
Repair open cir-
cuit in harness
between fuse (No.
4) and TCM, or
fuse (No. 4) and
battery, and poor
contact in cou-
pling connector.
Go to step 7.
Repair open cir-
cuit in harness
between fuse (No.
11) and TCM, or
fuse (No. 11) and
battery, and poor
contact in cou-
pling connector.
Repair open cir-
cuit in harness
between TCM and
transmission har-
ness connector,
and poor contact
in coupling con-
nector.