Component Inspection

Engine Control
P0642 Sensor Reference Voltage \'A\' Circuit Low - Inspection/Repair:_:Component Inspection

Component Inspection

Check sensor
1. IG "OFF" and disconnect MAPS, TPS, APS, A/C Refrigerant Pressure Sensor, CKPS(only ISG), BVS(only ISG) connector.
2. IG "ON".
3. Check that sensor connector power supply is within the specification after turning IG KEY "ON".
4. Connect MAPS connector, TPS connector, APS connector, A/C Refrigerant Pressure Sensor connector, CKPS(only ISG) connector, BVS(only ISG) 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 MAPS connector, TPS connector, APS connector, A/C Refrigerant Pressure Sensor connector, CKPS(only ISG) connector, BVS(only ISG) connector.

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