Connect scantool to Data Link Cable (DLC).
Warm engine up to normal operating temperature.
Turn "OFF" electrical devices and A/C.
Monitor "A/C COMPRESSOR CONTROL" parameter on the scantool.
Specification : A/C switch "ON" : A/C RELAY "ON" (Aircon compressor turns ON and OFF periodically by Aircon pressure S/W. )
A/C switch "OFF" : A/C RELAY "OFF"