California Vehicles (Digifant I)

Coolant Temperature Sensor Connector:

The coolant temperature sensor, which is threaded into the cylinder head coolant outlet, senses the temperature of the coolant. The sensor is a negative temperature coefficient (NTC) resistor, which means that its resistance decreases as coolant temperature increases.





The signal from the temperature sensor enables the Digifant I control unit to calculate the necessary correction value for fuel enrichment during starting and engine warm-up operations. When temperatures are low more fuel is provided. When temperatures are high less fuel is provided.

NOTE: Because of its adaptive capability, the Digifant I control unit MUST be returned to its reference settings IF:

1. The coolant temperature sensor (blue connector) has been disconnected while the engine is running.

2. Any of these components have been replaced:
^ Digifant I control unit
^ Air flow sensor
^ Throttle valve potentiometer
^ Throttle body

Refer to RESETTING DIGIFANT I CONTROL UNIT.