Heater Core Temperature Sensor / Switch: Testing and Inspection

Fig. 14 Checking resistance between terminals 651 & 938.:

Fig. 15 Water temperature sensor specifications.:

7. Check water temperature sensor, as follows:
a. The ignition switch must be in the OFF position.
b. After disconnecting the automatic air conditioning harness connector, ensure that there is resistance between terminals 651 and 938 Fig. 14.
c. Compare readings with readings given in Fig. 15.