Connect GDS 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 GDS.
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"
Fig.1) The operating condition of aircon relay is shown. Check if aircon compressor works properly when aircon switch is turning ON.
Fig.2) Diagnosing problem of "A/C RELAY" and "AIRCON COMPRESSOR" is convenient through ACTUATION TEST on the GDS.