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

Component Inspection

Reference Data:

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.

Reference Data:

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.