Interior Lighting System (Circuit Diagnosis)

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 INTERIOR ROOM LAMP CONTROL OUTPUT

CONSULT

Turn ignition switch ON.
Select INT LAMP of BCM (INT LAMP) active test item.
While operating the test item, check voltage between BCM harness connector M81 terminal 136 and ground.

BCM		Ground	Test item		Voltage (Approx.)
Connector	Terminal
M81	136		INT LAMP	On	0 V
				Off	Battery voltage

Is the inspection result normal?

YES

Interior room lamp control circuit is operating normally.

Fixed ON

GO TO 3.

Fixed OFF

GO TO 2.

CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT

Turn ignition switch OFF.
Disconnect BCM harness connector M81, front room/map lamp assembly harness connector R107 and cargo lamp harness connector R104.

Check continuity between BCM harness connector M81 terminal 136 and front room/map lamp assembly harness connector R107 terminal 7 and cargo lamp harness connector R104 terminal 3.

BCM		Foot lamp			Continuity
Connector	Terminal	Connector		Terminal
M81	136	Front room/map lamp assembly	R107	7	Yes
		Cargo lamp	R104	3

Reconnect the front room/map lamp assembly harness connector.

Check continuity between BCM harness connector M81 terminal 136 and personal lamps 2nd row harness connector R106 terminal 3.

BCM		Personal lamps 2nd row		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M81	136	R106	3	Yes

Is the inspection result normal?

YES

Check interior room lamps for an open. If NG, replace lamp in question. Refer to Removal and Installation (Front room/map lamp), Removal and Installation (Cargo lamp) or Removal and Installation (Personal lamps 2nd row). If OK, replace BCM. Refer to Removal and Installation .

Repair or replace harness or connectors.

CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT

Turn ignition switch OFF.
Disconnect BCM harness connector M81, front room/map lamp assembly harness connector R107 and cargo lamp harness connector R104.

Check continuity between BCM harness connector M81 terminal 136 and ground.

BCM		Ground	Continuity
Connector	Terminal
M81	136		No

Is the inspection result normal?

YES

Check interior room lamps for a short circuit. If NG, replace lamp in question. Refer to Removal and Installation (Front room/map lamp), Removal and Installation (Cargo lamp) or Removal and Installation (Personal lamps 2nd row). If OK, replace BCM. Refer to Removal and Installation .

Repair or replace harness or connectors.