Helpful Information

The engine coolant temperature sensor is case grounded, which provides the ground for the coolant temperature gauge circuit G20.

Circuit K4 splices to supply ground for the signals from the following:
- Upstream heated oxygen sensor
- Downstream heated oxygen sensor
- Camshaft position sensor
- Crankshaft position sensor
- Battery temperature sensor
- Throttle position sensor
- Manifold absolute pressure sensor
- Knock sensor
- Intake air temperature sensor
- Vehicle speed sensor