Cellular Communication System

• Specifications
  • Fastener Tightening Specifications
• Schematic Wiring Diagrams
  • OnStar Wiring 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 B2455: Open In Cellular Microphone Low Reference Circuit, Or Short To Voltage In Cellular Microphone Signal Circuit
    • 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: VCIM Does Not Detect The Presence Of The Cellular Antenna
    • 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: Keypad Signal Circuit Voltage
    • 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: Button Is Pressed Or Stuck For More Than 15 Seconds
    • 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: VCIM Does Not Detect A Navigation Signal
    • 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: VCIM Detects An Internal Communication Malfunction
    • Circuit Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When DTC Sets
    • Conditions for Clearing the DTC
    • Diagnostic Aids
    • Test Description
  • 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 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
• Repair Instructions
  • Coaxial Cable Replacement - Navigation and Cellular Telephone Antenna
    • Removal Procedure
    • Installation Procedure
  • Antenna Assembly Replacement - Cellular and Navigation
    • Removal Procedure
    • Installation Procedure
  • OnStar Button Assembly Replacement (Pick-Up)
  • 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
    • 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
    • Operation of the OnStar® Speech Recognition Systems
    • Personal Calling Commands