Cellular Communication System

• Specifications
  • Fastener Tightening Specifications
• Schematic And Routing Diagrams
  • Cellular Communication Schematic Icons
  • OnStar Schematics
• Component Locator
  • Cellular Communication Component Views
  • Cellular Communication Connectors
    • Cellular Microphone
    • OnStar Button Assembly
    • Vehicle Communication Unit (VCU) C1
    • Vehicle Communication Unit (VCU) C2
• Diagnostic Information And Procedures
  • Diagnostic Starting Point - Cellular Communication
  • Scan Tool Data List
  • Scan Tool Data Definitions
  • DTC B2455
    • Circuit Description
    • DTC Descriptor
    • 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
    • DTC Descriptor
    • 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
    • DTC Descriptor
    • 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
    • DTC Descriptor
    • 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
    • DTC Descriptors
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
  • DTC U1500
    • Circuit Description
    • DTC Descriptor
    • 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
  • OnStar Call Center Remote Function Requests Inoperative
    • Diagnostic Aids
  • Unable to Contact OnStar Call Center
    • Diagnostic Aids
  • Microphone Inoperative - Caller Cannot Be Heard
  • Voice Recognition Inoperative
  • OnStar Steering Wheel Control Functions 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
  • OnStar Reconfiguration
• Repair Instructions
  • Coaxial Cable Replacement - Cellular Telephone
    • Removal Procedure
    • Installation Procedure
  • Antenna Assembly Replacement - Cellular and Navigation
    • Removal Procedure
    • Installation Procedure
  • OnStar Button Assembly Replacement
    • Removal Procedure
    • Installation Procedure
  • Communication Interface Module Replacement
    • Removal Procedure
    • Installation Procedure
  • OnStar Microphone 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® Sleep Cycle
    • Deactivated OnStar® Accounts
    • OnStar® Reconfiguration Procedure
    • OnStar® Cellular, GPS, and Diagnostic Limitations
    • OnStar® Personal Calling
    • Operation of the Hands-Free Cellular Phone
    • OnStar® Steering Wheel Controls
    • OPC Features
    • Voice Feedback
    • OPC Security/System Lock
    • Nametags
    • Mobile Identification Number and Mobile Directory Number
      • Notes
      • Operation of the OnStar® Speech Recognition Systems