Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

TEST 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 outside temperature.
Example: If Channels 4 or 5 display a code of 73 on Control head, calculated temperature according to Chart 3 is 86°F (30°C).

NOTE:
The diagnostic value displayed on Channels 4 and 5 may stay at 128 if fault is with the sensor.

Outside Temperature Sensors, Chart 1 Of 3:

Chart 1 of 3

Outside Temperature Sensors, Chart 2 Of 3:

Chart 2 of 3

Outside Temperature Sensors, Specifications:

Chart 3 of 3