Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Mid Speed GMLAN Serial Data (+) | U0074 | U0074, U0100-U02FF* | U0074 | - |
| Mid Speed GMLAN Serial Data (-) | U0074 | U0074, U0100-U02FF* | U0074 | - |
| Ground (DLC, terminal 5) | - | 1 | - | - |
| * An open between the data link connector (DLC) and the first splice/device will only affect the communication with the scan tool. The devices will still communicate. An open in only one mid speed GMLAN serial data circuit may allow degraded communication between the devices. 1. No communication with any mid speed GMLAN device. |
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