Oxygen Sensor: Testing and Inspection

Circuit A64 also supplies battery voltage to the in tank fuel pump.

Circuit K4 splices to supply ground for the signals from the following:
- Heated oxygen sensor
- Camshaft position sensor
- Crankshaft position sensor
- Intake air temperature sensor
- Throttle position sensor
- Manifold absolute pressure sensor
- Engine coolant temperature sensor
- Vehicle speed sensor