Data Link Communications System
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Data Link Communications
- Diagnostic Trouble Code (DTC) List
- DTC U1000 and U1255: Critical Operating Parameter Has Not Been Received
- DTC U1001 To U1254: Module U1XXX Communication
- DTC U1300, U1301, or U1305: No Valid Messages Are Detected On The Class 2 Serial Data Circuit
- Symptoms - Data Link Communications
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with Class 2 Device
- Description and Operation