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 AUTOMATIC BACK DOOR SWITCH INPUT SIGNAL

Turn ignition switch OFF.
Disconnect automatic back door switch connector.

Check voltage between automatic back door switch harness connector and ground.

(+)		(-)	Voltage (Approx.)
Automatic back door switch
Connector	Terminal
M186	1	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO 3.

GO TO 2.

CHECK AUTOMATIC BACK DOOR SWITCH CIRCUIT

Disconnect automatic back door control module connector.

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

Automatic back door control module		Automatic back door switch		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B55	22	M186	1	Yes

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

Automatic back door control module		Ground	Continuity
Connector	Terminal
B55	22		No

Is the inspection result normal?

YES

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

Repair or replace harness.

CHECK AUTOMATIC BACK DOOR SWITCH GROUND CIRCUIT

Check continuity between automatic back door switch harness connector and ground.

Automatic back door switch		Ground	Continuity
Connector	Terminal
M186	2		Yes

Is the inspection result normal?

YES

GO TO 4.

Repair or replace harness.

CHECK AUTOMATIC BACK DOOR SWITCH
Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 5.

NO

Replace automatic back door switch. Refer to Removal and Installation .
CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Inspection End.