Subaru Legacy 2003 Service Manual page 1911

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
C: DTC P0037 — HO2S HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 2)
—
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
B19
3
2
1
B47
1
T5
REAR
OXYGEN SENSOR
T6
B :
B135
C : ECM
B136
D : B137
EN(H4DOSTC)-72
BATTERY
T5
B19
3
6
B122
B22
E3
E
T5
1 2
3 4
B22
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
T6
2 1
4 3
B135
1 2 3 4 5 6
10 11 12 13 14 15
20 21 22 23 24
B136
1 2 3 4
8 9 10 11 12 13 14 15 16
17 18 19 20 21
E
B137
1 2 3 4 5 6
13 14 15 16 17
10 11 12
22 23 24 25 26 27 28
B47
1 2
3 4
5 6
B122
1 2 3 4 5 6
7 8 9
16 17 18 19
25 26 27 28
5 6 7
22 23 24
7 8 9
18
19 20 21
29 30 31
EN-00934