Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | U183E | U183E | - | - |
| Ignition | U183E | U183E | - | - |
| Serial Data Communication Enable | U1814, U2099 | U183E | - | - |
| Low Speed GMLAN Serial Data | U0078* | U0078, U183E | U0078* | - |
| Ground | - | U183E | - | - |
| * Scan Tool Does Not Communicate With Low Speed GMLAN Device | ||||