Subaru Legacy 2003 Service Manual page 1997

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
AH:DTC P0508 — IDLE CONTROL SYSTEM CIRCUIT LOW —
• TROUBLE SYMPTOM:
• Erroneous idling
• Engine stalls.
• Engine breathing
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4DOSTC)-35,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOSTC)-33, Inspection
Mode.> .
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
IDLE
AIR CONTROL
SOLENOID
VALVE
E7
B136 ECM
B22
E3
E2
B21
E
EN(H4DOSTC)-158
BATTERY
SBF-5
E
B47
1 2
3 4
5 6
B22
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
E7
1 2 3
B21
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
17 18 19 20
B136
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24
EN-00947