Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: A/C compressor clutch will not disengage when no A/C request has been made and no disabling DTC has been set. | ||||
1 |
Is the compressor clutch being requested on by the powertrain control module (PCM)? | -- | Go to Step 4 | Go to Step 2 |
2 | Is the compressor clutch being requested on by the control head? | -- | Go to Step 10 | Go to Step 3 |
3 | Is the compressor clutch being commanded on by the body control module (SBM)? | -- | Go to Step 11 | Go to Step 5 |
4 | Replace the powertrain control module (PCM). Refer to Powertrain Control Module Replacement/Programming in Engine Controls. Is the repair complete? | -- | System OK | -- |
5 | Disconnect the A/C CLU relay from the underhood junction block. Does the A/C clutch disengage? | -- | Go to Step 7 | Go to Step 6 |
6 | Locate and repair a short to battery in CKT 59. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | System OK | -- |
7 | Measure the resistance between the A/C CLU relay terminal 85 and ground. Refer to Testing for Continuity in Wiring Systems. Does the resistance equal the specified value? | 0 ohms | Go to Step 8 | Go to Step 9 |
8 | Replace the A/C CLU relay. Is the repair complete? | -- | System OK | -- |
9 | Locate and repair a short to ground on CKT 459 between the underhood junction block and the A/C compressor clutch. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | System OK | -- |
10 | Replace the control head. Refer to Control Assembly Replacement . Is the repair complete? | -- | System OK | -- |
11 | Replace the BCM. Refer to Body Control Module Replacement in Body Control Systems. Is the repair complete? | -- | System OK | -- |
