Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | U1838 | U1838 | - | - |
| Ignition | U1838 | U1838 | - | - |
| Wake-Up Signal | P06E4 | U1838 | - | - |
| Communication Enable Signal | P1EB9 | U1838 | - | - |
| Chassis High Speed GMLAN Serial Data (+) | U007A, 1 | U1838 | U007A, 1 | - |
| Chassis High Speed GMLAN Serial Data (-) | U007A, 1 | U1838 | U007A, 1 | - |
| Ground | - | U1838 | - | - |
| 1. Scan Tool Does Not Communicate With High Voltage Energy High Speed GMLAN Device | ||||