Data Link Communications System

• Description & Operation
  • Notes
  • UART Data Line
  • Class 2 Data Line
  • Entertainment & Comfort Bus
  • Remote Control Door Lock Receiver Programming
  • SELECTABLE Transfer Case Control Module
• Component Locations
• Trouble Shooting
  • Preliminary Inspection
• Self Diagnostic System
  • Notes
  • Diagnostic Trouble Code Definitions
• System Tests
  • Diagnostic System Check
  • Scan Tool Inoperative
  • Scan Tool Does Not Communicate With EBCM
  • Scan Tool Does Not Communicate With UART Data Line
  • Scan Tool Does Not Communicate With Pcm
  • Scan Tool Does Not Communicate With VCM
  • Scan Tool Does Not Communicate With Class 2 Data Line
  • Scan Tool Does Not Communicate With Entertainment & Comfort Data Line
• Connector Identification
• Diagnostic Tests
  • DTC U1016: Loss Of Communications With Pcm/VCM
    • DTC Parameters
    • Action Taken When DTC U1016 Is Set
    • Diagnostic Procedure (PCM - Diesel)
    • Diagnostic Procedure (VCM - Gasoline)
  • DTC U1026: Loss Of Transfer Case Shift Control (ATC) Module Class 2 Communication
    • DTC Parameters
    • Diagnostic Procedures (4.3L)
    • Diagnostic Procedures (5.0 & 5.7L)
    • Diagnostic Procedures (6.5L Diesel)
  • DTC U1041: Loss Of EBCM Communication
    • DTC Parameters
    • Diagnostic Procedure (4.3L)
    • Diagnostic Procedure (5.0 & 5.7L)
  • DTC U1192 Or U1193: Loss Of EVO/PASSLOCK™ Or Vehicle Immobilizer Module (Vim) Class 2 Communication
    • Description
    • DTC Parameters
    • Action Taken When DTC U1192 (DTC U1193) Is Set
    • Diagnostic Procedure (4.3L)
    • Diagnostic Procedure (5.0 & 5.7L)
    • Diagnostic Procedure (6.5L Diesel)
  • DTC U1255: Serial Data Line Malfunction
    • Description
    • DTC Parameters
    • Action Taken When DTC U1255 Is Set
    • Diagnostic Procedure
• Wiring Diagrams