Subaru Legacy 2003 Service Manual page 861

DIAGNOSTICS FOR ENGINE STARTING FAILURE
ENGINE (DIAGNOSTICS)
7 CHECK HARNESS BETWEEN BATTERY
AND IGNITION SWITCH CONNECTOR.
1) Ignition switch to OFF.
2) Disconnect connector from ignition switch.
3) Measure power supply voltage between
ignition switch connector and chassis
ground.
Connector & terminal
(B72) No. 1 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
8 CHECK HARNESS BETWEEN BATTERY
AND IGNITION SWITCH CONNECTOR.
1) Connect connector to ignition switch.
2) Turn ignition switch to START.
3) Measure voltage between ignition switch
and chassis ground.
Connector & terminal
(B72) No. 3 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
9 CHECK TRANSMISSION TYPE.
Is the vehicle AT?
10 CHECK INHIBITOR SWITCH CIRCUIT.
1) Turn ignition switch to OFF.
2) Place the selector lever in the "P" or "N"
position.
3) Separate transmission harness connector.
4) Measure resistance between transmission
harness connector receptacle's terminals.
Connector & terminal
(T3) No. 11 — No. 12:
Is the measured value less than the speci-
fied value?
11 CHECK TRANSMISSION HARNESS.
1) Disconnect connector from inhibitor switch.
2) Measure resistance of harness between
transmission harness and inhibitor switch
connector.
Connector & terminal
(T3) No. 11 — (T7) No. 7:
(T3) No. 12 — (T7) No. 12:
Is the measured value less than the speci-
fied value?
12 CHECK POOR CONTACT.
Check poor contact in inhibitor switch connec-
tor.
Is there poor contact in inhibitor switch connec-
tor?
Step
EN(H4SOw/oOBD)-42
Value
10 V
10 V
Vehicle is AT.
1 Ω
1 Ω
There is poor contact.
Yes
Go to step 8. Repair open circuit
in harness
between ignition
switch and battery.
Go to step 9. Replace ignition
switch.
Go to step 10. Repair open circuit
between ignition
switch and starter
motor circuit.
Repair open circuit Go to step 11.
in harness
between starter
motor and ignition
switch connector.
Go to step 12. Repair open circuit
in harness
between transmis-
sion harness and
inhibitor switch
connector.
Repair poor con- Replace inhibitor
tact in inhibitor switch.
switch connector.
No