Subaru Legacy 2003 Service Manual page 2025

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
AT: DTC P1131 — O2 SENSOR CIRCUIT (SHORT) (BANK1 SENSOR1) —
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
FRONT OXYGEN
(A/F) SENSOR
B18
ECM
B137
EN(H4DOSTC)-186
BATTERY
SBF-5
B22
E3
E
B18
1 2
3 4
B47
1
3
5
B22
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
B137
1 2 3 4
10 11 12 13 14 15 16 17
22 23 24 25 26
E
2
4
6
5 6 7 8 9
18 19 20 21
27 28 29 30 31
EN-00933