Diagnosis Procedure
WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DOOR LOCK ACTUATOR INPUT SIGNAL
- Turn ignition switch OFF.
- Disconnect front door lock assembly LH connector.
- Check voltage between front door lock assembly LH harness connector and ground.
(+)
(-)
Condition
Voltage
(Approx.)
Front door lock assembly LH
Connector
Terminal
D14
1
Ground
Door lock and unlock switch
Lock
Battery voltage
2
Unlock
Is the inspection result normal?
YES
Replace front door lock assembly LH. Refer to Removal and Installation .
NO
.
- CHECK DOOR LOCK ACTUATOR CIRCUIT
- Disconnect BCM and front door lock assembly LH.
- Check continuity between BCM harness connector and front door lock assembly LH harness connector.
BCM
Front door lock assembly LH
Continuity
Connector
Terminal
Connector
Terminal
M81
135
D14
1
Yes
137
2
- Check continuity between BCM harness connector and ground.
BCM
Ground
Continuity
Connector
Terminal
M81
135
No
137
Is the inspection result normal?
YES
.
NO
Repair or replace harness.
- CHECK BCM OUTPUT SIGNAL
- Connect BCM connector.
- Check voltage between BCM harness connector and ground.
(+)
(-)
Condition
Voltage
(Approx.)
BCM
Connector
Terminal
M81
135
Ground
Door lock and unlock switch
Lock
Battery voltage
137
Unlock
Is the inspection result normal?
YES
Check for internal short of each door lock actuator.
NO
Replace BCM. Refer to Removal and Installation .