Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | U1844* | U1844 | - | - |
| Ignition | U1844* | U1844* | - | - |
| Accessory Wake Up Serial Data | U1814, U1844* | U1844* | - | - |
| Powertrain High Speed GMLAN Serial Data (+) | U0074* | U0074, U1844* | U0074* | - |
| Powertrain High Speed GMLAN Serial Data (-) | U0074* | U0074, U1844* | U0074* | - |
| Ground | - | U1844* | - | - |
| * Other modules/DTCs may set with this fault and multiple symptoms including a no start condition may occur. | ||||