Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Component Parts /circuit Diagnosis / Refrigerant Pressure Sensor

Nissan Sentra B18 (2020-2025) Service Manual: Refrigerant Pressure Sensor

Component Function Check

Component Function Check

CHECK REFRIGERANT PRESSURE SENSOR FUNCTION

Start engine and warm it up to normal operating temperature.
Turn A/C switch and blower fan switch ON.

Check the voltage between ECM harness connector terminals under the following conditions.

ECM			Voltage
Connector	+	–
Connector	Terminal
F24	48	45	1.0 – 4.0 V

Is the inspection result normal?

YES >>

INSPECTION END

NO >>

Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY

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

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

+	−	Voltage (Approx.)
E35	3	Ground	5 V

−

Voltage

(Approx.)

Refrigerant pressure sensor

Connector

Terminal

E35

Ground

5 V

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

GO TO 2.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

Turn ignition switch ON.
Disconnect ECM harness connector.

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

Refrigerant pressure sensor		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E35	3	F24	43	Existed

Also check harness for short to power.

Is the inspection result normal?

YES >>

Perform trouble diagnosis for power supply circuit.

NO >>

Repair or replace malfunctioning part.

CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT

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

Refrigerant pressure sensor		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E35	1	F24	45	Existed

Also check harness for short to power.

Is the inspection result normal?

YES >>

GO TO 4.

NO >>

Repair or replace malfunctioning part.

CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT

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

Refrigerant pressure sensor		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E35	2	F24	48	Existed

Also check harness for short to power.

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

Repair or replace malfunctioning part.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to Intermittent Incident.

Is the inspection result normal?
YES >>
Replace refrigerant pressure sensor. Refer to Removal and Installation.
NO >>
Repair or replace malfunctioning part.

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