Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | U18AC | U18AC | - | - |
| Ignition | U18AC | U18AC | - | - |
| Accessory Wakeup Serial Data | U1814, U2099 | U18AC | - | - |
| Chassis High Speed GMLAN Serial Data (+) | U0077* | U0077, U18AC* | U0077* | - |
| Chassis High Speed GMLAN Serial Data (-) | U0077* | U0077, U18AC* | U0077* | - |
| Ground | - | U18AC | - | - |
| * Other DTCs may set with this fault. | ||||