Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK STOP LAMP SWITCH FUNCTION

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the voltage between ECM harness connector and ground as per the following conditions.

+		-	Condition		Voltage (Approx.)
ECM
Connector	Terminal
E16	139	Ground	Brake pedal	Fully released	0 V
				Slightly depressed	Battery voltage

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

Fixed at 0 V: GO TO 2.

Fixed at battery voltage: GO TO 4.

CHECK STOP LAMP SWITCH POWER SUPPLY

Disconnect stop lamp switch harness connector.

Check the voltage stop lamp switch harness connector and ground.

+		-	Voltage
Stop lamp switch
Connector	Terminal
E38	1	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO 3.

Perform the trouble diagnosis for power supply circuit.

CHECK STOP LAMP SWITCH SIGNAL CIRCUIT

Check the continuity stop lamp switch harness connector and ECM harness connector.

+		-		Continuity
Stop lamp switch		ECM
Connector	Terminal	Connector	Terminal
E38	2	E16	139	Existed

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

GO TO 4.

Repair or replace error-detected parts.

CHECK STOP LAMP SWITCH
Check stop lamp switch. Refer to Component Inspection .

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

Replace stop lamp switch. Refer to Exploded View .