Component Inspection

Engine Control
P0643 Sensor Reference Voltage - Inspection/Repair:_:Component Inspection

Component Inspection

Check sensor
1. IG "OFF" and disconnect A/C Refrigerant Pressure Sensor, MAPS, TPS, APS 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,MAPS connector, TPS connector, APS 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, MAPS connector, TPS connector, APS connector.

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