Compressor Clutch Does Not Engage

TEST DESCRIPTION

Steps 1-6:

Steps 7-16:

Steps 17-28:

Steps 29-39:

The number(s) below refer to the step number(s) on the diagnostic table.
2. The A/C compressor relay output is disabled if engine coolant temperature is above 121°C (250°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.
5. The HVAC control assembly is inoperative when the module does not respond to any operator control requests.
24. Ensure to test both A/C request signal circuits of the A/C high pressure sensor for the listed conditions.