Component Inspection

Engine Control
P0642 Sensor Reference Voltage 'A' Circuit Low - Component Inspection

Component Inspection

Check sensor
1. IG "OFF" and disconnect A/C Refrigerant Pressure Sensor connector.
2. IG "ON".
3. Check that sensor connector power supply is within the specification after turning IG KEY "ON".
4. Connect A/C Refrigerant Pressure Sensor connector in turn.
5. Measure the voltage of power circuit of each sensor with all connector connected.

Specification : sensor power supply should not change as connecting A/C Refrigerant Pressure Sensor connector

6. Does change of sensor power supply occur as connecting sensor connector?