Diagnostic Fault Information
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 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 |
|---|---|---|---|---|
| B+ | U0100-U02FF | U0100-U02FF | - | - |
| Ignition | - | U0100-U02FF | - | - |
| Ground | U0100-U02FF | U0100-U02FF | - | - |
| Accessory Wakeup Serial Data | U1814 | U0100-U02FF | - | - |
| Serial Data Communication Enable | U2099 | U0100-U02FF | - | - |
| Powertrain High Speed GMLAN Serial Data (+) | 3 | U0100-U02FF | 3 | - |
| Powertrain High Speed GMLAN Serial Data (-) | 3 | U0100-U02FF | 3 | - |
| High Speed GMLAN Serial Data (+) | 2 | U0100-U02FF | 2 | - |
| High Speed GMLAN Serial Data (-) | 2 | U0100-U02FF | 2 | - |
| Low Speed GMLAN Serial Data | 1 | U0100-U02FF | 1 | - |
| 1. Scan tool does not communicate with low speed GMLAN device 2. Scan tool does not communicate with high speed GMLAN device 3. Scan tool does not communicate with powertrain high speed GMLAN device |
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