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