Subaru Legacy 2003 Service Manual page 1971

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Y: DTC P0270 — CYLINDER 4 INJECTOR CIRCUIT LOW —
• TROUBLE SYMPTOM:
• Engine stalls.
• Erroneous idling
• Rough driving
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
E5 E6
E16 E17
1 2
E5
#1
B136
1 2 3 4 1 2
5 6 7
8 9 10 11 12 13 14 15 16 10 11 12
22 23 24 22 23 24 25 26
17 18 19 20 21
EN(H4DOSTC)-132
C : D :
B136 B137
E16 E6
#2 #3 #4
FUEL INJECTORS
B137
3 4 5 6 7 8 9
13 14 15 16 17 18 19 20 21
27 28 29 30 31
BATTERY
SBF-5
ECM
B22
E3
E17
B47
B22
1 2
1 2 3 4
3 4
5 6 7 8
5 6
9 10 11 12
13 14 15 16
E
EN-00940