Subaru 2002 IMPREZA Service Manual page 1468

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
CQ: DTC P1153 — FRONT OXYGEN (A/F) SENSOR CIRCUIT RANGE/PERFOR-
MANCE PROBLEM (HIGH INPUT) [AT VEHICLES] —
• DTC DETECTING CONDITION:
• Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(TURBO)-45, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(TURBO)-42, Inspection Mode.> .
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
FRONT OXYGEN
(A/F) SENSOR
B18
B137 ECM
EN(TURBO)-308
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 5 6
10 11 12 13 14 15 16 17
22 23 24 25 26 27 28
B209
A1 A2 A3
B1 B2
C3
C1 C2
D1 D2
E1
F1
G1G2
H1 H2
H3
I1 I2
J3
J1 J2
E
2
4
6
7 8 9
18 19 20 21
29 30 31
A4 A5
B4 B5
C4 C5
D4 D5
E5
F5
G4 G5
H5
H4
I4 I5
J4 J5
EN1449