Compressor Clutch Does Not Engage
HVAC COMPRESSOR CLUTCH DOES NOT ENGAGETEST DESCRIPTION
Steps 1-4:
Steps 5-14:
Steps 15-26:
Steps 27-34:
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 124°C (255°F).
3. Placing the mode switch in any position other than OFF, along with placing the air temperature control switch in a cold setting, activates A/C operation. For the purpose of this and future steps where A/C operation is necessary, bi-level mode is used for consistent testing.
6. The HVAC control module is inoperative when the module does not respond to any operator control requests to enable the A/C compressor. The blower motor may still operate independent of the A/C controls.