 1.CHECK GROUND CONNECTION
- Turn A/C switch and blower fan switch OFF.
- Turn ignition switch OFF.
- Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES >>GO TO 2. NO >>Repair or replace ground connection.
 2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
- Disconnect refrigerant pressure sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between refrigerant pressure sensor harness connector and ground.
Refrigerant pressure sensor
| Ground
| Voltage (V)
| Connector
| Terminal
| E77
| 3
| Ground
| Approx. 5
|
Is the inspection result normal?
YES >>GO TO 4. NO >>GO TO 3.
 3.DETECT MALFUNCTIONING PART
Check the following. - Harness connectors M6, E106
- Harness connectors F103, M116
- Harness for open or short between ECM and refrigerant pressure sensor
>>Repair open circuit, short to ground or short to power in harness or connectors.
 4.CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- 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
| E77
| 1
| F102
| 74
| Existed
|
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >>GO TO 6. NO >>GO TO 5.
 5.DETECT MALFUNCTIONING PART
Check the following. - Harness connectors M6, E106
- Harness connectors F103, M116
- Harness for open or short between ECM and refrigerant pressure sensor
>>Repair open circuit, short to ground or short to power in harness or connectors.
 6.CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.
Refrigerant pressure sensor
| ECM
| Continuity
| Connector
| Terminal
| Connector
| Terminal
| E77
| 2
| F102
| 89
| Existed
|
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >>GO TO 8. NO >>GO TO 7.
 7.DETECT MALFUNCTIONING PART
Check the following. - Harness connectors M6, E106
- Harness connectors F103, M116
- Harness for open or short between ECM and refrigerant pressure sensor
>>Repair open circuit, short to ground or short to power in harness or connectors.
 8.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident. Is the inspection result normal? YES >>Replace refrigerant pressure sensor. NO >>Repair or replace malfunctioning part.
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