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.