Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | U18A7 | U18A7 | - | - |
| Ignition | U18A7 | U18A7 | - | - |
| Accessory Wakeup Serial Data | U1814, U2099 | U18A7 | - | - |
| Powertrain High Speed GMLAN Serial Data (+) | U0074* | U0074, U18A7* | U0074* | - |
| Powertrain High Speed GMLAN Serial Data (-) | U0074* | U0074, U18A7* | U0074* | - |
| Ground | - | U18A7 | - | - |
| * Other DTCs may set with this fault. | ||||