DTC 14

Fig. 17 Coolant temperature thermal switch test. Low temperature:

Fig. 46 Coolant temperature sensor, temperature-to-resistance curve. 1987 - 88 models:

Diagnostic Code 14
1. Disconnect battery ground cable, then drain cooling system.
2. Disconnect coolant temperature sensor connector, remove coolant temperature sensor from intake manifold.
3. Connect temperature sensor to a suitable ohmmeter, then immerse temperature sensing part into water and read resistance on ohmmeter while slowly raising water temperature, Fig. 17. Temperature to resistance relationship should be as shown, Fig. 46.
4. If measured resistance at each temperature is not equal to that indicated in graph, replace sensor.
5. Install sensor in intake manifold with new gasket, then torque sensor to 9.5 - 12.0 ft. lbs.
6. Connect electrical connector to temperature sensor, then refill cooling system.
7. Connect battery ground cable.