Subaru Legacy 2003 Service Manual page 553

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Y: DTC P0138 — O2 SENSOR CIRCUIT HIGH VOLTAGE (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
T5
B19
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)-156
6
B61 F44
T5
B19
EG FG
2 3
4 1
B83
FG : FOR G.C.C COUNTRIES MODEL
: EXCEPT FOR G.C.C COUNTRIES MODEL
EG
B22
E3
B137
1 2 3
1 2 3 4
7 8 9
5
6 7 8 9 10 11 12 13
15 16 17 18 19 20 18 19 20
14
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
25 26
21 22 23 24
20 21 22 23
B135
4 5 6 7
16 17 18 19
26 27 28
24 25
EN-01122