Operation CHARM: Car repair manuals for everyone.

Compressor Clutch Does Not Engage



HVAC COMPRESSOR CLUTCH DOES NOT ENGAGE

TEST DESCRIPTION

Steps 1-9:




Steps 10-22:




Steps 23-36:




The numbers below refer to the step numbers on the diagnostic table.
2. The A/C compressor relay output is disabled if engine coolant temperature is above 121°C (250°F).
3. There are 2 A/C request outputs from the HVAC control assembly. One request comes from the mode switch when in the defrost mode and the other request comes from the A/C switch.