Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HALF LATCH SWITCH INPUT SIGNAL

Turn ignition switch OFF.
Disconnect back door lock assembly connector.

Check voltage between back door lock assembly harness connector and ground.

(-)		(-)	Voltage (Approx.)
Back door lock assembly
Connector	Terminal
D557	6	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO 3.

GO TO 2.

CHECK HALF LATCH SWITCH CIRCUIT

Disconnect automatic back door control module connector.

Check continuity between automatic back door control module harness connector and back door lock assembly harness connector.

Automatic back door control module		Back door lock assembly		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B55	3	D557	6	Yes

Check continuity between automatic back door control module harness connector and ground.

Automatic back door control module		Ground	Continuity
Connector	Terminal
B55	3		No

Is the inspection result normal?

YES

Replace automatic back door control module. Refer to Removal and Installation .

Repair or replace harness.

CHECK HALF LATCH SWITCH GROUND CIRCUIT

Check continuity between back door lock assembly harness connector and ground.

Back door lock assembly		Ground	Continuity
Connector	Terminal
D557	8		Yes

Is the inspection result normal?

YES

GO TO 4.

Repair or replace harness.

CHECK HALF LATCH SWITCH
Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 5.

NO

Replace back door lock assembly. Refer to Removal and Installation .
CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Inspection End.