Coolant Temperature Sensor / Switch HVAC: Service and Repair

Inspection

1. Ignition "ON"
2. Using the multi-tester, Measure resistance between terminal "1" and "2" of water temperature sensor.




[Specification]





3. If the measured resistance is not specification, substitute with a known-good water temperature sensor and check for proper operation.
4. If the problem is corrected, replace the water temperature sensor.

NOTE:
Negative type thermistor that resistance will rise with lower temperature, and reduce with higher temperature.

Replacement

1. Disconnect the negative (-) battery terminal.
2. Remove the crash pad lower cover (A).




3. Remove the crash pad lower panel(A).




4. After loosening the mounting bolts, then the reinforcing panel (A).




5. Remove the shower duct (A).




6. Disconnect the connector (A) of water temperature sensor and then remove the water temperature sensor(B) by pulling out.





NOTE:
Take care that wire of water temperature sensor is not to be damaged

7. Installation is the reverse order of removal.

NOTE:
Apply caulk to the water temperature sensor.
Make sure that there is no air leakage