Diagnostic Fault Information
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
| Circuit |
Short to Ground |
Open/High Resistance |
Short to Voltage |
Signal Performance |
| A/C Relay Coil Ignition |
2 |
2 |
- |
- |
| A/C Relay Switch B+ |
2 |
2 |
- |
- |
| A/C Relay Control |
P0645 |
P0645 |
P0645 |
- |
| A/C Clutch Control |
2 |
2 |
1 |
- |
| A/C Compressor Clutch Ground |
- |
2 |
2 |
- |
1. A/C Clutch Always Engaged
2. A/C Clutch Inoperative |