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