DTC 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 REFRIGERANT PRESSURE SENSOR POWER SUPPLY

Turn ignition OFF.
Disconnect refrigerant pressure sensor harness connector.
Turn ignition switch ON.

Check the voltage between refrigerant pressure sensor harness connector and ground.

+		-	Voltage (Approx.)
Refrigerant pressure sensor
Connector	Terminal
E48	1	Ground	5 V

Is the inspection result normal?

YES

GO TO 3.

GO TO 2.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.

+		-		Continuity
Refrigerant pressure sensor		ECM
Connector	Terminal	Connector	Terminal
E48	1	F54	18	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 REFRIGERANT PRESSURE SENSOR GROUND

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.

+		-		Continuity
Refrigerant pressure sensor		ECM
Connector	Terminal	Connector	Terminal
E48	3	F54	25	Existed

Also check harness for short to power.

Is the inspection result normal?

YES

GO TO 4.

Repair or replace error-detected parts.

CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT

Check the continuity between ECM harness connector and refrigerant pressure sensor harness connector.

+		-		Continuity
Refrigerant pressure sensor		ECM
Connector	Terminal	Connector	Terminal
E48	2	F54	20	Existed

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

GO TO 5.

Repair or replace error-detected parts.

CHECK INTERMITTENT INCIDENT.
Perform Intermittent Incident .

Is the inspection result normal?

YES

Replace refrigerant pressure sensor. Refer to Removal and Installation .

NO

Repair or replace error-detected parts.