Diagnosis Procedure
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 DOOR SWITCH INPUT SIGNAL
- Turn the ignition switch OFF.
- Disconnect malfunctioning door switch connector.
- Check signal between malfunctioning door switch harness connector and ground using oscilloscope.
(+)
(-)
Signal
(Reference value)
Door switch
Connector
Terminal
Driver side
B8
3
Ground
11.8 V
Passenger side
B108
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- CHECK DOOR SWITCH CIRCUIT
- Disconnect BCM connector.
- Check continuity between door switch harness connector and BCM harness connector.
Door switch
BCM
Continuity
Connector
Terminal
Connector
Terminal
Driver side
B8
3
M20
96
Yes
Passenger side
B108
94
- Check continuity between door switch harness connector and ground.
Door switch
Ground
Continuity
Connector
Terminal
Driver side
B8
3
No
Passenger side
B108
Is the inspection result normal?
YES
Replace BCM. Refer to Removal and Installation .
NO
Repair or replace harness.
- CHECK DOOR SWITCH
Refer to Component Inspection .
Is the inspection result normal?
YES
GO TO 4.
NO
Replace malfunctioning door switch. Refer to Removal and Installation .
- CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .
Inspection End.