Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | U1860 | U1860 | - | - |
| Ignition | U1860 | U1860 | - | - |
| Wake-Up Signal | U1814, U2099 | U1860 | - | - |
| High Speed GMLAN Serial Data (+) | U0073* | U1860 | U0073* | - |
| High Speed GMLAN Serial Data (-) | U0073* | U1860 | U0073* | - |
| Ground | - | U1860 | - | - |
| * Scan Tool Does Not Communicate With High Speed GMLAN Device | ||||