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 WARNING BUZZER POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect the warning buzzer harness connector.
Turn ignition switch ON.

Check voltage between the warning buzzer harness connector and ground.

Terminals			Voltage (Approx.)
(+)		(-)
Warning buzzer		Ground
Connector	Terminal
M129	1		Battery voltage

Is the inspection result normal?

YES

GO TO 2 .

Repair the warning buzzer power supply circuit.

CHECK WARNING BUZZER GROUND CIRCUIT

Turn ignition switch OFF.
Check continuity between the warning buzzer harness connector and ground.

Warning buzzer		Ground	Continuity
Connector	Terminal
M129	3		Yes

Is the inspection result normal?

YES

GO TO 3 .

Repair the harness or connector.

CHECK WARNING BUZZER SIGNAL CIRCUIT FOR OPEN

Disconnect the ADAS control unit connector.

Check continuity between the ADAS control unit harness connector and warning buzzer harness connector.

ADAS control unit		Warning buzzer		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M128	4	M129	2	Yes

Is the inspection result normal?

YES

GO TO 4 .

Repair the harness or connector.

CHECK WARNING BUZZER SIGNAL CIRCUIT FOR SHORT

Check continuity between the ADAS control unit harness connector and ground.

ADAS control unit		Ground	Continuity
Connector	Terminal
M128	4		No

Is the inspection result normal?

YES

GO TO 5 .

Repair the harness or connector.

CHECK WARNING BUZZER OPERATION
1. Connect the warning buzzer connector.
2. Turn ignition switch ON.
3. Apply ground to warning buzzer terminal 2.
4. Check condition of the warning buzzer.
Does warning buzzer sound?

YES

Replace the ADAS control unit. Refer to Removal and Installation .

NO

Replace the warning buzzer. Refer to Removal and Installation .