Cellular Communication System

• Specifications
  • Fastener Tightening Specifications
• Schematic and Routing Diagrams
  • OnStar Schematics
• Component Locator
  • Cellular Communication Component Views
  • Cellular Communication Connector End Views
• 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 B2462
    • 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 U1500
    • 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
  • OnStar Symptom Diagnosis
    • System Description
    • Diagnostic Aids
  • Symptoms - Cellular Communication
    • Notes
    • Visual/Physical Inspection
    • Intermittent
    • Symptom List
  • OnStar Always On
  • OnStar One or More Buttons Inoperative
  • OnStar Call Center Remote Function Requests Inoperative
    • Diagnostic Aids
  • Unable to Contact OnStar Call Center
    • Diagnostic Aids
  • OnStar Call Center Unable to Configure OnStar (R) System
  • Microphone Inoperative - Caller Cannot Be Heard
  • Voice Recognition Inoperative
  • OnStar Button LED Inoperative
    • Test Description
  • No (or Noisy) OnStar Audio
  • Global Positioning System (GPS) Data Not Current or Inaccurate
    • Diagnostic Aids
  • OnStar Battery Consumption Test
    • Notes
    • Diagnostic Aids
  • OnStar Reconfiguration
    • OnStar® Module Reprogramming
    • Vehicle Interface Unit (VIU)
    • Vehicle Communication Unit (VCU)
• Repair Instructions
  • Coaxial Cable Replacement - Cellular Telephone
    • Removal Procedure
    • Installation Procedure
  • Coaxial Cable Replacement - Global Positioning System (GPS)
    • Removal Procedure
    • Installation Procedure
  • Antenna Replacement - Cellular Communications (Utility)
    • Removal Procedure
    • Installation Procedure
  • Antenna Assembly Replacement - Cellular and Navigation
    • Removal Procedure
    • Installation Procedure
  • Vehicle Locating Antenna Ground Plate Replacement
    • Removal Procedure
    • Installation Procedure
  • Navigation Antenna Replacement
    • Removal Procedure
    • Installation Procedure
  • OnStar Button Assembly Replacement (Utility)
    • Removal Procedure
    • Installation Procedure
  • OnStar Vehicle Communication Unit (VCU) Replacement
    • Removal Procedure
    • Installation Procedure
  • OnStar Vehicle Interface Unit (VIU) Replacement
    • Removal Procedure
    • Installation Procedure
  • OnStar Microphone Replacement
    • Removal Procedure
    • Installation Procedure
• Description and Operation
  • OnStar Description and Operation
    • Notes
    • OnStar® Button Assembly
    • OnStar® Microphone
    • Vehicle Interface Unit (VIU)
    • Vehicle Communication Unit (VCU)
    • Cellular and GPS 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
    • OPC Features
    • Voice Feedback
    • OPC Security/System Lock
    • Nametags
    • Mobile Identification Number and Mobile Directory Number
    • Operation of the OnStar® Speech Recognition Systems