Data Link Communications System

• Schematic and Routing Diagrams
  • Data Link Communications Schematic Icons
  • Data Link Connector (DLC) Schematics
• Component Locator
  • Data Link Communications Component Views
  • Data Link Communications Connector End Views
• 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
    • Circuit Description
    • DTC Descriptors
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Diagnostic Aids
    • Test Description
  • DTC U1001 To U1254: Module U1XXX Communication
    • Circuit Description
    • DTC Descriptors
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Diagnostic Aids
    • Test Description
  • DTC U1300, U1301, or U1305: No Valid Messages Are Detected On The Class 2 Serial Data Circuit
    • Circuit Description
    • DTC Descriptors
    • Conditions for Running the DTCs
    • Conditions for Setting the DTCs
    • Action Taken When the DTCs Sets
    • Conditions for Clearing the DTC
    • Diagnostic Aids
  • Symptoms - Data Link Communications
    • Notes
    • Visual/Physical Inspection
    • Intermittent
    • Symptom List
  • Scan Tool Does Not Power Up
    • Circuit Description
    • Test Description
  • Scan Tool Does Not Communicate with Class 2 Device
    • Circuit Description
    • Diagnostic Aids
    • Test Description
• Description and Operation
  • Data Link Communications Description and Operation
    • Circuit Description
    • Class 2 Serial Data Link
    • Data Link Connector (DLC)
    • Diagnostic Trouble Codes (DTCs)