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DTC "C44" (P0130/P0135): HO2 Sensor (HO2S) Circuit Malfunction (For E-02, 19, 24, 33)
Detected Condition and Possible Cause
Detected Condition
HO2 sensor output voltage is not input to
ECM during engine operation and running
C44/P0130
condition.
Sensor voltage < 0.55 V
The heater can not operate so that heater
C44/P0135
operation voltage is not supplied to the
oxygen heater circuit.
Wiring Diagram
ECM
12
E2
6
HO2
17
HO2.H
Troubleshooting (When Indicating C44/P0130:)
CAUTION
!
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with a
needle pointed tester probe to prevent terminal damage.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to "Use of SDS Diagnosis Reset
Procedures (Page 1A-13)".
B/Br
Br
B/R
ECM coupler (Harness side)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Engine General Information and Diagnosis:
Possible Cause
• HO2 sensor circuit is open or shorted to the power
source.
• Heated circuit is open or shorted to the ground.
• Battery voltage is not supply to the HO2 sensor.
Engine stop
Side-stand
switch
relay
B/G
To Side-
stand switch
HO2 sensor
16
17
35
36
37
38
39
33
34
44
45
46
47
48
Ignition
switch
40
41
42
43
49
50
51
52
1A-80
B940H21104024
I940H1110072-02
I940H1110012-03
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