Subaru Legacy 2003 Service Manual page 557

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Z: DTC P0139 — O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 2)
—
• DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode<Ref. to EN(H4SO)-47, OPER-
ATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)-40, OPERATION, Inspection
Mode.> .
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
B19 B47 B83
T6 1 2
1 2 3 4 5 6
3 4
5 6
2 1
4 3
2
B19 T5
REAR
OXYGEN SENSOR
T6
B:
B135
C: B136 ECM
D: B137
F44
B22
1 2 3 4 1 2 3 4
5 6 7 8
5 6 7 8
9 10 11 12
13 14 15 16
EN(H4SO)-160
6
F44
B61
T5
B19
EG FG
2 3
4 1
B83
: FOR G.C.C COUNTRIES MODEL
FG
: EXCEPT FOR G.C.C COUNTRIES MODEL
EG
B22
E3
B137
3 4 1 2 3
1 2
7 8 9
5 6 7 8 9 10 11 12 13
18 19 20
14 15 16 17 18 19 20
BATTERY
SBF-5
B136
4 5 6
1 2 3
10 11 12 13 14 15 16 17
8 9 10 11 12 13 14 15
21 22 23 24 25 26
20 21 22 23
B135
4 5 6 7
16 17 18 19
24 25 26 27 28
EN-01122