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
1. Turn ignition switch OFF.
2. Disconnect BCM connectors.
3. Check voltage between BCM connector and ground.
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.
B2196 Dongle unitDescription BCM performs ID verification between BCM and dongle unit. When verification result is OK, BCM permits cranking. ...

Description Vehicle security indicator is built in combination meter. NATS (Nissan Anti-Theft System) condition is indicated by blink or illumination of vehicle security indicator. ...
Engine control system symptoms
Symptom Table
SYSTEM - BASIC ENGINE CONTROL SYSTEM
1 - 6: The numbers refer to the order of inspection.
(continued on next table)
SYSTEM - ENGINE MECHANICAL & OTHER
1 - 6: The numbers refer to the order of inspection. ...
Seat belt retractor
SEAT BELT RETRACTOR : Removal and Installation
REMOVAL
CAUTION:
Before servicing, turn ignition switch OFF, disconnect battery negative terminal
and wait at least three
minutes.
Disconnect both the negative and positive battery cables, then wait at
least three minutes. Refer to PG " ...