Diagnostic Fault Information
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. 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 Clutch Relay Coil Ignition | 1 | P0645 | - | - |
| A/C Clutch Relay Switch B+ | 1 | 1 | - | - |
| A/C Clutch Relay Coil Control | 1 | 1 | - | - |
| A/C Clutch Relay Switch Control | P0646 | P0645 | P0647 | - |
| Component Ground | - | 1 | - | - |
| 1. A/C Compressor Inoperative | ||||