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.

Seat belt warning does not sound even though driver seat belt is not fastened.
Seat belt warning sounds even though driver seat belt is fastened.

CHECK WARNING CHIME OPERATION

CONSULT

Select "BUZZER" of "BCM".
Select "SEAT BELT WARN TEST" in "Active Test" mode.
Touch "ON/OFF" to check that the function operates normally.

Component	CONSULT	Condition
Buzzer	SEAT BELT WARN TEST	ON
Buzzer	SEAT BELT WARN TEST	OFF

Is the inspection result normal?

YES

GO TO 2 .

Replace combination meter. Refer to Removal and Installation (with Type A meter), or Removal and Installation (with Type B meter).

CHECK COMBINATION METER INPUT SIGNAL
Check the combination meter input signal. Refer to Component Function Check .

Is the inspection result normal?

YES

Replace BCM. Refer to Removal and Installation .

NO

GO TO 3 .
CHECK SEAT BELT BUCKLE SWITCH LH CIRCUIT
Check the seat belt buckle switch LH circuit. Refer to Diagnosis Procedure .

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace harness or connector.
CHECK SEAT BELT BUCKLE SWITCH LH
Check the seat belt buckle switch LH. Refer to Component Inspection .

Is the inspection result normal?

YES

Replace the combination meter. Refer to Removal and Installation (with Type A meter), or Removal and Installation (with Type B meter).

NO

Replace the seat belt buckle switch LH. Refer to Removal and Installation .