Diagnostic Fault Information
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. 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 B+ | 1 | 1 | - | - |
| Relay Switch B+ | 1 | 1 | - | - |
| A/C Low Pressure Switch Signal | - | 1 | 1 | - |
| A/C Compressor Relay Control | P0645 | P0645 | P0645 | - |
| A/C Compressor Control | 1 | 1 | 2 | - |
| A/C Compressor Ground | - | 1 | - | - |
| A/C Low Pressure Switch Ground | - | 1 | - | - |
| 1. A/C Compressor Inoperative 2. A/C Compressor Always Engaged |
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