Coolant Temperature Sensor / Switch HVAC: Testing and Inspection
Engine Temperature SensorTEST CONDITIONS
- Fuses OK (check according to wiring diagram.
- Ambient temperature above 10° C (50° F).
- Engine at normal operating temperature.
- Vehicle not parked in direct sunlight.
Use Chart 3 to determine calculated engine coolant temperature.
EXAMPLE: If Channel 6 displays a code of 187 on Control head, calculated temperature according to Chart 3 is 25°C (77°F).
NOTE: The Engine temperature sensor is not equipped on all models (to be phased in). For vehicles without coolant temperature sensor (G62), view A/C control head. Channel 6 will display a code of 255 for open circuit.
Engine Coolant Temperature Sensor, Chart 1 Of 3:
Chart 1 of 3
Engine Coolant Temperature Sensor, Chart 2 Of 3:
Chart 2 of 3
Engine Coolant Temperature Sensor, Specifications:
Chart 3 of 3