Subaru LEGACY 2003 Service Manual page 64

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
B: DTC 12 STARTER SWITCH
• DIAGNOSIS:
• The starter switch signal is abnormal.
• The harness connector between ECM and starter switch is in short or open.
• TROUBLE SYMPTOM:
• Failure of engine to start
CAUTION:
After repair or replacement of faulty parts, conduct CLEAR MEMORY and INSPECTION MODES. <Ref.
to EN(H4SOw/oOBD)-28, OPERATION, Clear Memory Mode.> and <Ref. to EN(H4SOw/oOBD)-26, OP-
ERATION, Inspection Mode.>
• WIRING DIAGRAM:
B135
28
B72
1 2 3 4 5 6
1 2
7 8 9 10 11 12
3 4
1 CHECK OPERATION OF STARTER MOTOR.
Does starter motor operate when ignition
switch starts?
SBF-4
IGNITION
SWITCH
B72
AT
AT
B14
STARTER
MOTOR
T7
Step
EN(H4SOw/oOBD)-62
SBF-1
P
12 12
11 7
B12 T3 T7
B12
1
1 2 3 4
8
5 6 7 8
20 21
9 10 11 12
Value
Starter motor operates.
BATTERY
INHIBITOR SWITCH
R N D 3 2 1
B135
2 3 4 5 6 7
9
10 11 12 13 14 15 16 17 18 19
22 23 24 25 26 27 28
Yes
Go to step 2.
EN-01045
No
Check starter
motor circuit.