Chart 1 No Compressor Operation

Compressor Controls Schematic:

Chart 1, No Compressor Operation:

CIRCUIT DESCRIPTION
The compressor clutch coil is fed power through the A/C relay and is grounded through the A/C ground (Circuit 150).



1. This step checks to see if the fault lies in the output or input side of the PCM.
2. This step checks Circuit 639 for an open.
3. This step indirectly checks the A/C compressor control relay.
4. This step checks Circuit 366 for an open.
5. This step checks to see if the A/C relay is receiving voltage on Circuit 639.
6. This step checks to see if there is an open or short to ground in the compressor clutch power Circuit 59.
7. This step checks to see if the compressor clutch is faulty or if there is an open in the compressor clutch ground Circuit 150.