Compressor Clutch Does Not Engage

TEST DESCRIPTION

Steps 1-2:

Steps 3-4:

Steps 5-8:

Steps 9-12:

Steps 13-17:

Steps 18-24:

Steps 25-30:

Steps 31-36:

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) for the L36/L67 and 124°C (255°F) for the LG8.
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.