Component Test

Air Conditioning Switch And A/C Compressor Relay Circuit:

COMPONENT TEST
1. Connect a Scan Tool to the diagnostic connector and read the Air Conditioner Switch input state.
2. When the A/C switch is depressed, the Scan Tool should show ON, when the A/C switch is released, the Scan Tool should show OFF.

If any of the previous tests produce unsatisfactory results, the harness will need to be repaired or replaced. Once repairs have been completed, clear the trouble codes and road test the vehicle to confirm that the repair has corrected the problem and the code doesn't return.


If the same trouble code reoccurs, it is possible that there is an intermittent failure of the component or the ECM. Check for looseness at all harness junctions and test for an intermittent failure.