Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

Step 1:

Step 2:

Step 3:

Step 4:

DIAGNOSTIC PROCEDURE
SYMPTOM: Ambient sensor circuit is open or shorted. 21 or -21 is indicated on auto amp. as a result of conducting Self-diagnosis STEP 2.)

ELECTRICAL COMPONENT INSPECTION




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

Part 1 Of 2:

Part 2 Of 2:

If NG, replace Ambient Sensor.