Subaru Forester 2004 Service Manual page 112

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
R: DTC P0137 O
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4DOTC 2.5)-42,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC 2.5)-35, OPERATION,
Inspection Mode.>.
WIRING DIAGRAM:
MAIN RELAY
6
4
5
B18
3
2
1
B47
4
6
B83
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 2)
2
2
T5
REAR OXYGEN
SENSOR
T6
A :
B134
B :
B135
ECM
C :
B136
D :
B137
EN(H4DOTC 2.5)-111
BATTERY
T5
B18
4
1
B122
B21
E2
E
Check
Is any other DTC displayed?
ENGINE (DIAGNOSTIC)
T6
B47
1 2
2 1
3 4
4 3
5 6
B18
1 2
3 4
B122
1 2 3 4
5 6 7 8
: B134
A
1 2 3 4
8 9 10 11 12 13 14 15
18 19 20 21 22 23 24
28 29 30 31 32
: B135
B
1 2 3 4
8 9 10 11 12 13 14 15
20 21 22 23 24
28 29 30 31 32 33
: B136
C
1 2 3 4
7 8 9 10 11 12 13 14 15
17 18 19 20 21 22 23
28 29 30 31
E
: B137
D
1 2 3 4
8 9 10 11 12 13 14 15
18 19 20 21 22 23
26 27 28 29
Yes
Inspect the DTC Go to step 2.
using "List of Diag-
nostic Trouble Code
(DTC)". <Ref. to
EN(H4DOTC 2.5)-
65, List of Diag-
nostic Trouble
Code (DTC).>
B21
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
B83
1 2 3 4 5 6
5 6 7
16 17
25 26 27
33 34
5 6 7
16 17 18 19
25 26 27
34 35
5 6
16
24 25 26 27
32 33 34 35
5 6 7
16 17
24 25
30 31
EN-02360
No