Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

Step 1:

Steps 2 - 3:

Step 4:

DIAGNOSTIC PROCEDURE

SYMPTOM: Ambient sensor circuit is open or shorted. (21 or -21 is indicated on the display as a result of conducting Self-diagnosis STEP 2.)

COMPONENT INSPECTION







Ambient Sensor
After disconnecting ambient sensor harness connector, measure resistance between terminals 2 and 1 at sensor harness side, using the table.

If NG, replace ambient sensor.