Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Chassis High Speed GMLAN Serial Data (+) | U0077 | U0077, U0100 - U02FF* | U0077 | - |
| Chassis High Speed GMLAN Serial Data (-) | U0077 | U0077, U0100 - U02FF* | U0077 | - |
| Ground (DLC, terminal 5) | - | 1 | - | - |
| * An open in only one chassis high speed GMLAN serial data circuit may allow degraded communication between the devices. 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. 1. No communication with any chassis high speed GMLAN device. |
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