Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

ENGINE COOLANT TEMPERATURE SENSOR










1. Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.
2. If NG, replace engine coolant temperature sensor.

ENGINE COOLANT TEMPERATURE SENSOR










Check resistance as shown in the figure.

RADIATOR COOLANT TEMPERATURE SENSOR










1. Check resistance between radiator coolant temperature sensor terminals 1 and 2 as shown in the figure.

CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

2. If NG, replace radiator coolant temperature sensor.