Coolant Temperature Sensor

Test the coolant temperature sensor by detaching its harness connector and checking resistance across the sensor terminals. The resistance varies with engine coolant temperature. A sensor with resistance not corresponding to the values shown in the chart in Fig. 6-45 is faulty and should be replaced. When replacing the sensor, drain and refill the engine coolant as described in COOLING SYSTEM.

Fig. 6-45.

Motronic coolant temperature sensor specifications.