Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan Armada and 2018 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT

Turn the ignition switch ON.
Check voltage between ADAS control unit harness connector and ground.

Terminals			Condition	Voltage (Approx.)
(+)		(-)
ADAS control unit		Ground	Warning systems switch
Connector	Terminal
B52	18		Pressed	0 V
			Released	12 V

Is the inspection result normal?

YES

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

GO TO 2 .

CHECK WARNING SYSTEMS SWITCH
1. Turn ignition switch OFF.
2. Remove warning systems switch. Refer to Removal and Installation .
3. Check warning systems switch. Refer to Component Inspection .
Is the inspection result normal?

YES

GO TO 3 .

NO

Replace the warning systems switch. Refer to Removal and Installation .

CHECK WARNING SYSTEMS SWITCH GROUND CIRCUIT

Check continuity between twin switch harness connector terminal and the ground.

Twin switch		Ground	Continuity
Connector	Terminal
M127	3		Existed

Is the inspection result normal?

YES

GO TO 4 .

Repair harness or connector.

CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT CIRCUIT FOR OPEN

Disconnect the ADAS control unit connector.

Check continuity between the ADAS control unit harness connector and twin switch harness connector.

ADAS control unit		Twin switch		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B52	18	M127	2	Existed

Is the inspection result normal?

YES

GO TO 5 .

Repair the harnesses or connectors.

CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT CIRCUIT FOR SHORT

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

ADAS control unit		Ground	Continuity
Connector	Terminal
B52	18		Not existed

Is the inspection result normal?

YES

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

Repair the harnesses or connectors.