Dtc "C42" (P1650): Ig Switch Circuit Malfunction; Dtc "C44" (P0130/P0135): Ho2 Sensor (Ho2S) Circuit Malfunction - Suzuki GSF650A Service Manual

DTC "C42" (P1650): IG Switch Circuit Malfunction

Detected Condition and Possible Cause
Detected Condition
Ignition switch signal is not input in the ECM.
Troubleshooting
NOTE
• Refer to "Ignition Switch Inspection in Section 9C (Page 9C-11)" for details.
• After repairing the trouble, clear the DTC using SDS tool. Refer to "Use of SDS Diagnosis Reset
Procedures (Page 1A-15)".

DTC "C44" (P0130/P0135): HO2 Sensor (HO2S) Circuit Malfunction

Detected Condition and Possible Cause
Detected Condition
HO2 sensor output voltage is not input to ECM during
engine operation and running condition.
Sensor voltage > 1.0 V
The heater can not operate so that heater operation
voltage is not supplied to the oxygen heater circuit.
Wiring Diagram
ECM
29 E2
12
HO2
40 HO2.H
B/Br
W/G
O/W
W/B
HO2 sensor
ECM coupler (Harness side)
Engine General Information and Diagnosis:
Possible Cause
• Ignition system circuit open or short.
• ECM malfunction.
Possible Cause
• HO2 sensor circuit open or short.
• ECM malfunction.
• HO2 sensor lead wire/coupler connection.
• Battery voltage supply to the HO2 sensor
Engine stop Side-stand
switch relay
To Side-
stand switch
1A-104
B817H21104025
B817H21104026
Ignition
switch
I718H1110114-04
I718H1110240-01