DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan NV3500 HD, 2018 Nissan NV2500 HD, and 2018 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THROTTLE CONTROL MOTOR RELAY CONTROL SIGNAL

Turn ignition switch OFF.

Check the voltage between ECM harness connector and ground.

ECM			Voltage
Connector	+	-
	Terminal
F54	34	128	Battery voltage

Is the inspection result normal?

YES

GO TO 3.

GO TO 2.

CHECK THROTTLE CONTROL MOTOR RELAY CONTROL SIGNAL CIRCUIT

Disconnect ECM harness connector.
Disconnect IPDM E/R harness connector.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

+		-		Continuity
ECM		IPDM E/R
Connector	Terminal	Connector	Terminal
F54	34	E122	47	Existed

Also check harness for short to ground.

Is the inspection result normal?

YES

Perform the trouble diagnosis for power supply circuit.

Repair or replace error-detected parts.

CHECK THROTTLE CONTROL MOTOR POWER SUPPLY

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

ECM				Condition	Voltage (Approx.)
+		-
Connector	Terminal	Connector	Terminal
F54	1	E16	128	Ignition switch: OFF	0 V
				Ignition switch: ON	Battery voltage

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

GO TO 4.

CHECK THROTTLE CONTROL MOTOR POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.
Disconnect IPDM E/R harness connector.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

+		-		Continuity
ECM		IPDM E/R
Connector	Terminal	Connector	Terminal
F54	1	E119	6	Existed

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

Repair or replace error-detected parts.