Diagnostic Fault Information
WARNING: This page is about a different car, the 2017 GMC Acadia. 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 |
| Relay Coil Ignition |
P0645 |
P0645 |
- |
- |
| Relay Switch B+ |
1 |
1 |
- |
- |
| Relay Coil Control |
P0646 |
P0645 |
P0647 |
- |
| Relay Switch Control |
1 |
1 |
1 |
- |
| Ground |
- |
1 |
- |
- |
| 1. A/C Compressor Malfunction |