Cellular Communication System

• Specifications
• Schematic and Routing Diagrams
  • Cellular Communication Schematic Icons
  • OnStar Schematics
• Component Locator
  • Cellular Communication Component Views
  • Cellular Communication Connectors
• Diagnostic Information and Procedures
  • Diagnostic Starting Point-Cellular Communication
  • Diagnostic System Check-Cellular Communication
    • Test Description
  • Scan Tool Data List
  • Scan Tool Data Definitions
  • Diagnostic Trouble Code (DTC) List
  • DTC B2455
    • Circuit Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Test Description
  • DTC B2470
    • Circuit Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Test Description
  • DTC B2476
    • Circuit Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Test Description
  • DTC B2482
    • Circuit Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Test Description
  • DTC B2483 or B2484
    • Circuit Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Test Description
  • DTC U1306
    • Circuit Description
    • Conditions for Running the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the MIL/DTC
  • DTC U1500
    • Circuit Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When DTC Sets
    • Conditions for Clearing the DTC
    • Diagnostic Aids
  • OnStar Symptom Diagnosis
    • System Description
    • Diagnostic Aids
  • Symptoms-Cellular Communication
    • Notes
    • Visual/Physical Inspection
    • Intermittent
    • Symptom List
  • OnStar One or More Buttons Inoperative
  • Unable to Contact OnStar Call Center
    • Diagnostic Aids
  • Microphone Inoperative - Caller Cannot Be Heard
  • Voice Recognition Inoperative
  • OnStar Button LED Inoperative
    • Test Description
  • No (or Noisy) OnStar Audio
    • Test Description
  • Global Positioning System (GPS) Data Not Current or Inaccurate
    • Diagnostic Aids
• Repair Instructions
  • Coupling Replacement-Antenna Inner
    • Removal Procedure
    • Installation Procedure
  • Coupling Replacement-Antenna Outer
    • Removal Procedure
    • Installation Procedure
  • Navigation Antenna Replacement
    • Removal Procedure
    • Installation Procedure
  • Communication Interface Module Replacement
    • Removal procedure
    • Installation Procedure
• Description and Operation
  • OnStar Description and Operation
    • Notes
    • Vehicle Communication Interface Module (VCIM)
    • OnStar® Button Assembly
    • OnStar® Microphone
    • Cellular and Navigation Antennas
    • OnStar® Reconfiguration Procedure
    • OnStar® Cellular, GPS, and Diagnostic Limitations
    • Operation of the Hands Free Cellular Phone
    • Operation of the OnStar® Speech Recognition Systems