Body Control System (DTC/Circuit Diagnosis)
WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN
- Turn the ignition switch OFF.
- Disconnect BCM connector M19 and combination switch connector.
- Check continuity between BCM connector and combination switch connector.
Signal
BCM
Combination switch
Continuity
Connector
Terminal
Connector
Terminal
INPUT 1
M19
79
M28
11
Yes
INPUT 2
78
9
INPUT 3
77
7
INPUT 4
76
10
INPUT 5
75
13
Is the inspection result normal?
YES
GO TO 2.
NO
Repair or replace harness or connectors.
- CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT
Check continuity between BCM connector and ground.
Signal
BCM
Ground
Continuity
Connector
Terminal
INPUT 1
M19
79
No
INPUT 2
78
INPUT 3
77
INPUT 4
76
INPUT 5
75
Is the inspection result normal?
YES
GO TO 3.
NO
Repair or replace harness or connectors.
- CHECK BCM OUTPUT VOLTAGE
- Connect BCM connector M19 and combination switch connector.
- Turn the ignition switch ON.
- Check voltage between BCM connector and ground.
Signal
BCM
Ground
Voltage
Connector
Terminal
INPUT 1
M19
79
--
Refer to Reference Value .
INPUT 2
78
INPUT 3
77
INPUT 4
76
INPUT 5
75
Is the inspection result normal?
YES
Replace the combination switch. Refer to Removal and Installation .
NO
Replace BCM. Refer to Removal and Installation .