Oxygen Sensor: Testing and Inspection

- Along with supplying voltage to the ASD relay contacts, circuit A14 supplies voltage to the contact side of the fuel pump relay
- Circuit A142 splices to supply voltage to the fuel injectors and ignition coil.
Circuit K4 splices to supply ground for the signals from the following:
- Camshaft position sensor
- Crankshaft position sensor
- Intake air temperature sensor
- Throttle position sensor
- Manifold absolute pressure sensor
- Engine coolant temperature sensor
- Vehicle speed sensor