Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | U183C | U183C | - | - |
| Ignition | U183C | U183C | - | - |
| Accessory Wake Up Serial Data | U1814, U2099 | U183C | - | - |
| Powertrain High Speed GMLAN Serial Data (+) | U0074* | U0074, U183C* | U0074* | - |
| Powertrain High Speed GMLAN Serial Data (-) | U0074* | U0074, U183C* | U0074* | - |
| Ground | - | U183C | - | - |
| *Other DTCs may set with this fault | ||||