Exterior 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 TURN SIGNAL LAMP BULB
Check the applicable lamp bulb to be sure the proper bulb standard is in use and the bulb is not open.

Is the bulb OK?

YES

GO TO 2.

NO

Replace the bulb.

CHECK TURN SIGNAL LAMP OUTPUT VOLTAGE

Turn the ignition switch OFF.
Disconnect the front combination lamp harness connector, the rear combination lamp (body side) harness connector or the door mirror harness connector in question.
Turn the ignition switch ON.
Operate the turn signal switch.

While the turn signal is operating, check the voltage between the front combination lamp harness connector and ground.

(+)			(-)	Voltage (Approx.)
Connector		Terminal
RH	E238	6	Ground	Courtesy of NISSAN NORTH AMERICA, INC.
LH	E233

While the turn signal is operating, check the voltage between the rear combination lamp (body side) harness connector and ground.

(+)			(-)	Voltage (Approx.)
Connector		Terminal
RH	B409	4	Ground	Courtesy of NISSAN NORTH AMERICA, INC.
LH	B408

While the turn signal is operating, check the voltage between the door mirror harness connector and ground.

With around view monitor

(+)			(-)	Voltage (Approx.)
Connector		Terminal
LH	D6	20	Ground	Courtesy of NISSAN NORTH AMERICA, INC.
RH	D116

Without around view monitor

(+)			(-)	Voltage (Approx.)
Connector		Terminal
LH	D4	7	Ground	Courtesy of NISSAN NORTH AMERICA, INC.
RH	D107

Is voltage reading as specified?

YES

GO TO 5.

GO TO 3.

CHECK TURN SIGNAL LAMP CIRCUIT FOR OPEN

Turn the ignition switch OFF.
Disconnect BCM harness connector M20 and M80.

Check continuity between the BCM harness connector and the front combination lamp harness connector.

Front combination lamp			BCM		Continuity
Connector		Terminal	Connector	Terminal
LH	E233	6	M80	117	Yes
RH	E238			105

Check continuity between the BCM harness connector and the rear combination lamp (body side) harness connector.

Rear combination lamp (body side)			BCM		Continuity
Connector		Terminal	Connector	Terminal
LH	B408	4	M20	103	Yes
RH	B409			92

Check continuity between the BCM harness connector and the door mirror harness connector.

With around view monitor

BCM			Door mirror		Continuity
Connector		Terminal	Connector	Terminal
LH	M80	117	D6	20	Yes
RH		105	D116

Without around view monitor

BCM			Door mirror		Continuity
Connector		Terminal	Connector	Terminal
LH	M80	117	D4	7	Yes
RH		105	D107

Is the inspection results normal?

YES

GO TO 4.

Repair or replace the harness or connectors.

CHECK TURN SIGNAL LAMP SHORT CIRCUIT

Check continuity between the BCM harness connector and ground.

BCM			Ground	Continuity
Connector		Terminal
LH	M80	117		No
RH		105

Check continuity between the BCM harness connector and ground.

BCM			Ground	Continuity
Connector		Terminal
LH	M20	103		No
RH		92

Are the inspection results normal?

YES

Replace BCM. Refer to Removal and Installation .

Repair or replace the harness or connectors.

CHECK TURN SIGNAL LAMP GROUND CIRCUIT

Check continuity between the front combination lamp harness connector and ground.

Front combination lamp			(-)	Continuity
Connector		Terminal
LH	E233	5	Ground	Yes
RH	E238

Check continuity between the rear combination lamp (body side) harness connector and ground.

Rear combination lamp (body side)			(-)	Continuity
Connector		Terminal
LH	B408	5	Ground	Yes
RH	B409

Check continuity between the door mirror harness connector and ground.

With around view monitor

Door mirror			(-)	Continuity
Connector		Terminal
LH	D6	19	Ground	Yes
RH	D116

Without around view monitor

Door mirror			(-)	Continuity
Connector		Terminal
LH	D4	2	Ground	Yes
RH	D107

Are continuity results as specified?

YES

Replace the malfunctioning lamp.

Repair or replace the harness or connectors.