Diagnosis Procedure

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

CHECK STEP LAMP OUTPUT

CONSULT

Turn ignition switch ON.
Select "STEP LAMP TEST" in "Active Test" mode of "BCM".
While operating the test item, check voltage between BCM harness connector M21 terminal 21 and ground.

BCM		Ground	STEP LAMP TEST	Voltage (Approx.)
Connector	Terminal
M21	21		On	0V
			Off	Battery voltage

Is the inspection result normal?

YES

Fixed ON

GO TO 3 .

Fixed OFF

GO TO 2.

CHECK STEP LAMP OPEN CIRCUIT

Turn ignition switch OFF.
Disconnect the following harness connectors:
- BCM M21
- Front step lamp LH D11
- Front step lamp RH D109
- Foot lamp LH M99
- Foot lamp RH M100
Check continuity between BCM harness connector and the following lamp harness connector terminal:

BCM		Step lamp			Continuity
Connector	Terminal	Connector		Terminal
M21	21	Front step lamp LH	D11	2	Yes
		Front step lamp RH	D109
		Foot lamp LH	M99
		Foot lamp RH	M100

Is the inspection result normal?

YES

Check front step lamp or foot lamp for an open. If open is found, replace lamp in question. Refer to Removal and Installation for front step lamps or Removal and Installation for foot lamps. If OK, replace BCM. Refer to Removal and Installation .

Repair or replace harness or connectors.

CHECK STEP LAMP SHORT CIRCUIT

Turn ignition switch OFF.
Disconnect the following harness connectors:
- BCM M21
- Front step lamp LH D11
- Front step lamp RH D109
- Foot lamp LH M99
- Foot lamp RH M100
Check continuity between BCM harness connector and ground.

BCM		Ground	Continuity
Connector	Terminal
M21	21		No

Is the inspection result normal?

YES

Replace BCM. Refer to Removal and Installation .

Repair or replace harness or connectors.