Ambient Temperature Sensor / Switch HVAC: Description and Operation

Intake Sensor
The intake sensor is located on the heater and cooling unit. It converts temperature of air after it passes through the evaporator into a resistance value which is then input to the A/C control unit.
After disconnecting intake sensor harness connector, measure resistance between terminals 1 and 2 at sensor harness side, using the table.

Diagnostic Procedure Step 1:

Diagnostic Procedure Step 2 - 3:

DIAGNOSTIC PROCEDURE
SYMPTOM: Intake sensor circuit is open or shorted.