Voltage Measurements
Grounds
Battery Supply
Main Relay Supply
Coolant Temperature Sensor
Fuel Pump Relay
Air Conditioner Control
Throttle Switch
Air Flow Sensor
* With the engine at operating temperature raise the rpm to 2500 and then shut oft the ignition. After about 3 to 4 seconds the voltage will go to about 4 and then return to zero.
Oxygen Sensor
** Varies between these values at about 2000 rpm.