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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
H: DTC P0037 HO2S HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 2)
DTC DETECTING CONDITION:
• Detected when two consecutive driving cycles with fault occur.
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-18, DTC P0037 HO2S HEATER CONTROL CIRCUIT
LOW (BANK 1 SENSOR 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
CAUTION:
After repairing or replacing the defective parts, perform the Clear Memory Mode <Ref. to
EN(H4DOTC)(diag)-53, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to
EN(H4DOTC)(diag)-43, PROCEDURE, Inspection Mode.>.
WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
SBF-5
2
B61
F44
REAR OXYGEN
SENSOR
T6
T5
B83
B19
*
SHIELD & SENSOR
*
GROUND JOINT CONNECTOR
3
JOINT
7
CONNECTOR
B122
ECM
A:
B134
C:
B136
D:
B137
B:
B135
B21
E100
E
E
: TERMINAL No. OPTIONAL
*
ARRANGEMENT
EN(H4DOTC)(diag)-93
ENGINE (DIAGNOSTICS)
T6
BATTERY
1
2
3
4
F44
1 2 3 4
5 6 7 8
E
B21
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
34
35
36
37
42
43
44
48
49
50
A:
B134
1
2
3
8
9
10 11 12 13 14 15
18
19 20
21
22
28 29
30
31
32
B:
B135
1
2
3
8
9
10 11 12 13 14 15
20
21 22 23
28
29
30
31
C:
B136
1
2
3
7
8
9
10 11 12 13 14 15
17 18 19 20
21 22 23
28
29
30
D:
B137
1
2
3
8
9
10 11 12 13 14 15
18
19 20
21
22
26 27
28 29
B19
B47
1
2
1
2
3
4
3
4
5
6
B122
B83
1 2
3 4
5 6
7 8
38
39
40
41
45
46
47
51
52
53
54
5
4
6
7
16
17
23 24
25
26 27
33 34
4
5
6
7
16
17 18 19
24
25
26 27
32
33
34 35
4
5
6
16
24
25
26
27
31
32
33 34 35
4
5
6
7
16
17
23
24
25
30
31
EN-05414
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