For Mexico

REFRIGERANT PRESSURE SENSOR

Component Function Check


1. CHECK REFRIGERANT PRESSURE SENSOR FUNCTION

1.Start engine and warm it up to normal operating temperature.
2.Turn A/C switch and blower fan switch ON.
3.Check the voltage between ECM harness connector terminals as per the following.





Is the inspection result normal?
YES- INSPECTION END
NO- Go to "Diagnosis Procedure" .


Diagnosis Procedure


1. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

1.Disconnect refrigerant pressure sensor harness connector.
2.Turn ignition switch ON.
3.Check the voltage between refrigerant pressure sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. DETECT MALFUNCTIONING PART

Check the following.
- Harness for open or short between ECM and refrigerant pressure sensor
- Loose or poor connection for each connector and harness
- Repair open circuit, short to ground or short to power in harness or connectors.

3. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.

4. DETECT MALFUNCTIONING PART

Check the following.
- Harness for open or short between ECM and refrigerant pressure sensor
- Loose or poor connection for each connector and harness
- Repair open circuit, short to ground or short to power in harness or connectors.

5. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

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





2.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 6.

6. DETECT MALFUNCTIONING PART

Check the following.
- Harness for open or short between ECM and refrigerant pressure sensor
- Loose or poor connection for each connector and harness
- Repair open circuit, short to ground or short to power in harness or connectors.

7. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- Replace refrigerant pressure sensor. Refer to "REFRIGERANT PRESSURE SENSOR : Removal and Installation" Service and Repair.
NO- Repair or replace malfunctioning part.