Diagnosis Procedure
Regarding Wiring Diagram information, refer to BCS "Wiring Diagram".
1.CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown. 
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2.
2.CHECK POWER SUPPLY CIRCUIT

Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK GROUND CIRCUIT
Check continuity between BCM connector and ground.
Is the inspection result normal?
YES >> Inspection End.
NO >> Repair harness or connector
U1000 CAN COMMDTC Logic DTC DETECTION LOGIC NOTE: U1000 can be set if a module harness was disconnected and reconnected, perhaps during a repair. Confirm that there are actual CAN diagnostic symptoms and a ...

Description Detects door open/close condition. ...
Owner's Manual/Service Manual order information
Genuine NISSAN Service Manuals for this model
year and prior can be purchased. A Genuine
NISSAN Service Manual is the best source of
service and repair information for your vehicle.
This manual is the same one used by the factorytrained
technicians working at NISSAN dealerships.
Genuine NI ...
Door check link
DOOR CHECK LINK : Removal and Installation
REMOVAL
Fully close the front door window.
Remove front door finisher. Refer to INT "Removal and Installation".
Remove front door speaker bolts.
Disconnect harness connector from front door speaker and remove.
Remove door check link ...