Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: A/C compressor clutch will not disengage when no A/C request has been made and no Powertrain DTC has been set. | ||||
1 | Was the entire HVAC diagnostic system check performed? | -- | Go to Step 2 | Go to Diagnostic System Check |
2 |
Does the A/C compressor clutch coil disengage? | -- | Go to Step 3 | Go to Step 4 |
3 |
Important: Perform the reprogramming procedure for the PCM. Replace the Powertrain Control Module (PCM). Refer to Powertrain Control Module Replacement/Programming in Engine Controls. Is the repair complete? | -- | Go to Step 11 | -- |
4 |
Does the A/C compressor clutch coil disengage? | -- | Go to Step 5 | Go to Step 8 |
5 |
Is CKT 459 continuous to ground? | -- | Go to Step 6 | Go to Step 7 |
6 | Repair a short to ground in CKT 459 between the underhood accessory wiring junction block and the PCM connector C2. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 11 | -- |
7 | Replace the A/C CLU relay. Refer to Compressor Relay Replacement . Is the repair complete? | -- | Go to Step 11 | -- |
8 |
Is voltage present on CKT 59? | -- | Go to Step 9 | Go to Step 10 |
9 | Repair a short to B+ on CKT 59 between the underhood accessory wiring junction block and the A/C compressor clutch coil. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 11 | -- |
10 | Replace the A/C compressor clutch coil. Refer to Air Conditioning Clutch Coil Replacement . Is the repair complete? | -- | Go to Step 11 | -- |
11 |
Have all repairs been made? | -- | Go to Diagnostic System Check | -- |
