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• MODEL SELECTION INDEX
• 2005 WL Series - Service Information
• Section 12J Body Control Module
  • 1 General Information
    • 1.1 Abbreviations
    • 1.2 Body Control Module
    • 1.3 Body Control Module Models
    • 1.4 Body Control Module Features
      • Feature Table Key
      • Feature Table
  • 2 System Operation
    • 2.1 Body Control Module Operating Modes
      • Battery Saver Mode
      • Pre-delivery Mode
    • 2.2 Serial Data Communication – V6
      • System Overview
        • V6 Serial Data Block Diagram
        • The GM LAN Bus System
        • UART Communications
        • Serial Data Bus
        • Data Bus Device Polling
        • Tech 2 and the Data Link Connector
      • Inputs and Outputs
        • GM LAN Data Bus
        • Serial Data Signal – Primary UART
        • Serial Data Signals – Secondary and Tertiary UART
        • Data Bus Device Polling
        • Data Messages
      • Powertrain Interface Module
    • 2.3 Serial Data Communication – GEN III V8
      • System Overview
        • GEN III V8 Serial Data Block Diagram
        • UART and Class 2 Serial Data Bus
        • Data Bus Device Polling
        • Tech 2 and the Data Link Connector
      • Inputs and Outputs
        • Class 2 Serial Data Signal
        • Serial Data Signal – Primary UART
        • Serial Data Signals – Secondary and Tertiary UART
        • Data Bus Device Polling
        • Data Messages
      • Powertrain Interface Module
    • 2.4 Remote Receiver / Key
      • System Operation
        • Unlocking
        • Locking
        • Rear Compartment Lid Release
        • Remote Coded Key Battery Failure
      • Circuit Operation
    • 2.5 Accessory Power Control
      • System Operation
        • Accessory Relay Shutdown Options
        • Wiper Control of the Accessory Relay
      • Circuit Operation
        • Radio On and Ignition Switch Input
    • 2.6 Central Door Locking
      • System Operation
        • Door Locking
        • Door Unlocking
        • Deadlocking
        • Single-stage and Two-stage Unlocking
      • System Check
        • Key Locking
        • Remote Coded Key Check
        • Deadlocking Check
        • Door-lock Failure Warning
        • Auto Door-lock in Drive
        • Overheating Prevention
        • Functional Description of Door Locking/Unlocking Operation
        • Functional Diagram of Door Locking/Unlocking Operation
      • Circuit Operation
        • Unlocking
        • Locking
        • Door Input Signals
    • 2.7 Rear Compartment Lid Release
      • System Operation
      • Circuit Operation
        • Battery Power
        • Inputs
        • Outputs
    • 2.8 Theft Deterrent System
      • System Operation
        • V6 Engine
        • GEN III V8 Engine
        • Battery
        • Security Status Indicator
      • Circuit Operation
        • Battery Power
        • Turn Signal Lamp Power
        • Inputs
        • Outputs
    • 2.9 Entry Deterrent System
      • System Operation
        • Arming the System
        • Triggered Operation
        • Disarming Procedure
        • Multi-function Display (MFD) Trigger Point Displays
        • Remote Rear Compartment Release
        • Loss of Vehicle Battery Power
      • Circuit Operation
        • Power Supplies
        • Inputs
        • Outputs
    • 2.10 Power Window System
      • System Operation
        • System Active
        • System Inactive
        • Automatic Down Operation of Front Windows
        • Lockout Switch
      • Circuit Operation
        • Ignition ON Input Signal
        • Driver and Front Passenger Window-down Circuit
        • Driver and Front Passenger Window-up Circuit
        • Rear Passenger Window Operation
    • 2.11 Wiper System Intermittent Function
      • System Operation
      • Circuit Operation
        • Intermittent Wiper Switch
        • Wiper Dwell Controller
        • Vehicle Speed and Reverse Gear
        • Window Washer Switch
    • 2.12 Dome Lamp Delay Control
      • System Operation
      • Circuit Operation
        • Inputs
    • 2.13 Automatic Lamp Control
      • System Operation
        • Automatic Lights On
        • Automatic Lights Off
        • Approach Illumination
      • Circuit Operation – Lights On
        • Inputs
        • Power Supplies
        • Ground Circuits
      • Circuit Operation – Lights Off
        • Inputs
        • Power Supplies
        • Ground Circuits
    • 2.14 Instrument Dimming Control
      • System Operation
      • Circuit Operation
        • Inputs
    • 2.15 Occupant Protection System Deployment Vehicle Shutdown
      • System Operation
        • OPS Deployment Signals
    • 2.16 Priority Key System
      • Operating Parameters
        • Parameter Checks
      • Circuit Operation
    • 2.17 Power Antenna Control
      • System Operation
        • Power Antenna
      • Circuit Operation
        • Antenna Up Switch Input Signal
        • Antenna Up Memory Height
        • Antenna Down
        • Antenna Auto Down
    • 2.18 Rear Lamp Failure Warning System
      • System Operation
        • Components Monitored
      • Circuit Operation
        • Ground Circuit Monitoring
        • Rear Lamp Failure Warning Lamp
        • Inputs
    • 2.19 Hazard Lamp Control
      • System Operation
      • Circuit Operation
  • 3 Wiring Diagrams and Connector Charts
    • 3.1 Wiring Diagrams – V6
      • Ignition Key, RX Sensor, Common Power and Grounds
      • Accessory Power Circuit
      • UART and GM LAN Communications
      • Central Door Locking
      • Entry Deterrent, Warning Horns and Rear Compartment Solenoid
      • Power Windows
      • Wiper Systems Intermittent Function
      • Dome Lamp Delay Control
      • Automatic Lamp Control
      • Power Antenna Control
      • Rear Lamp Failure System
      • Hazard Lamp Control, Theft / Turn Signal Lamp Flasher
    • 3.2 Connector Charts – V6
    • 3.3 Wiring Diagrams – GEN III V8
      • Ignition Key, RX Sensor, Common Power and Grounds
      • Accessory Power Circuit
      • UART and Class 2 Communications
      • Central Door Locking
      • Entry Deterrent, Warning Horns and Rear Compartment Solenoid
      • Power Windows
      • Wiper Systems Intermittent Function
      • Dome Lamp Delay Control
      • Automatic Lamp Control
      • Power Antenna Control
      • Rear Lamp Failure System
      • Hazard Lamp Control, Theft / Turn Signal Lamp Flasher
    • 3.4 Connector Charts – GEN III V8
    • 3.5 Connector Information
      • BCM Location and Wiring Connectors
      • BCM Connector Pin Identification
        • Legend – Circuit Type
        • Explanation of Terms
  • 4 Tech 2 Information
    • 4.1 Connecting Tech 2 for System Diagnosis
    • 4.2 Tech 2 Test Modes and Displays
    • 4.3 Normal Mode
    • 4.4 Diagnostic Trouble Codes
      • Read DTC Information
      • Read Alarm Codes
      • Clear DTC and Alarm Codes
    • 4.5 Data Display
      • Inputs and Outputs
      • BCM Internal Status
      • Serial Data Inputs
      • Priority 1 User Settings
      • Priority 2 User Settings
      • Alarm / Theft Deterrent
      • Central Door Locking
      • Power Windows
      • Wipers
      • Headlamps
      • Instrument Illumination
      • Interior Illumination
      • Rear Lamp Failure
      • Antenna
      • System Identification
    • 4.6 Snapshot
    • 4.7 Miscellaneous Tests
      • Lamps
        • Interior Lamp
        • Headlamps
        • Indicators
        • Instrument Illumination
        • Auto Lights On
        • Rear Lamp Bulb Fail
        • Rear Stop Lamp Bulb Fail
        • Rear Lamp Fuse Fail
      • Data Bus Isolator
      • Central Locking
      • Rear Compartment
      • Wipers
        • Front Wipers
      • Power Windows
        • Driver’s Window Auto down
        • Front Passenger’s Window Auto down
        • Power Window Relay
      • Antenna
      • Horn
      • Interior Illumination Relay
      • Accessory Relay
      • Security System
        • Security LED
        • Theft Deterrent Horn
        • Key Priority
    • 4.8 Program
      • User Settings
        • Instrument Illumination
      • Options
        • Antenna Height Memory
      • Set Key to Priority 1
      • Learn BCM Settings
      • Program Learnt BCM Settings
    • 4.9 Security
      • BCM Link to ECM/PCM/PIM
      • Security Information
      • Program
  • 5 Diagnostics
    • 5.1 Introduction
    • 5.2 Prerequisites to Diagnosis and Troubleshooting
      • Preliminary System Requirements
      • Pre-delivery Mode
      • Safety Requirements
      • Equipment and Checking
    • 5.3 Diagnostic Trouble Code Definitions
      • Current Diagnostic Trouble Codes
      • History Diagnostic Trouble Codes
    • 5.4 Description of Diagnostic Trouble Codes
      • Multiple Diagnostic Trouble Code Fault Condition
    • 5.5 Intermittent Fault Conditions
      • Description
    • 5.6 Diagnostic System Check
      • Description
        • Test Description
        • Diagnostic Table
    • 5.7 Symptoms Diagnostics Table
    • 5.8 Diagnostic Trouble Code List
    • 5.9 Serial Data Communications
      • DTC Description
      • Circuit Description
      • Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.10 Remote Receiver / Key
      • Circuit Description
        • Remote Coded Key Battery Failure
      • Preliminary Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Main Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.11 Accessory Power Control
      • Circuit Description
      • Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.12 Central Door Locking
      • System Overview
        • Unlocking the Doors Using the Driver’s Door Microswitch
        • Locking the Doors Using the Driver’s Door Microswitch
      • Door Locking System Test Overview
      • Diagnostic Trouble Codes
        • Conditions for Setting the DTC
        • Conditions for Clearing the DTC
      • Preliminary Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Unlocking the Driver’s Door Using the Door Lock Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Unlocking the Driver’s Door Using the Door Snib Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Unlocking / Locking the Front Passenger’s Doors Using the Door Snib Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Deadlocking the Vehicle’s Doors Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Auto Door Locking (Gearshift In and Out of Park Position) Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Door Ajar Switches Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Rear Compartment Release Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.13 Theft Deterrent System
      • Circuit Description
        • V6 Engines
        • GEN III V8 Engine
      • Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.14 Entry Deterrent System
      • Circuit Description
      • Preliminary Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Main Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Horn Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.15 Power Window System
      • Circuit Description
      • Introduction
      • Preliminary Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Main Power Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Front Window Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Rear Windows Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.16 Wiper Systems Intermittent Function
      • Circuit Description
      • Introduction
      • Preliminary Diagnostic Table
        • Test Description
        • Diagnostic Table
      • Intermittent Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Road Speed Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.17 Dome Lamp Delay Control
      • Circuit Description
        • Battery Saver Mode
      • Preliminary Diagnostic Table
        • Test Descriptions
        • Diagnostic Table Notes
        • Diagnostic Table
      • Main Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.18 Automatic Lamp Control
      • Circuit Description
        • Automatic Lamps Off
        • Automatic Lamps On
        • Adjustment
        • Approach Illumination
      • Preliminary Diagnostic Table
        • Test Description
        • Diagnostic Table
      • Sunload Sensor Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
      • Lamps On / Lamps Off Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.19 Instrument Dimming Control
      • Circuit Description
      • Preliminary Diagnostic Table
        • Test Description
        • Diagnostic Table
      • Main Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.20 OPS Deployment Vehicle Shutdown
      • Circuit Description
      • Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.21 Priority Key System
      • Circuit Description
      • Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.22 Power Antenna Control
      • Circuit Description
      • Diagnostic Table
        • Test Description
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.23 Rear Lamp Failure Warning System
      • Circuit Description
      • Preliminary Diagnostic Table
        • Test Descriptions
        • Diagnostic Table
      • Main Diagnostic Table
        • Test Descriptions
        • Diagnostic Table Notes
        • Diagnostic Table
    • 5.24 Hazard Lamp Control
      • Circuit Description
      • Preliminary Diagnostic Table
        • Test Descriptions
        • Diagnostic Table
      • Main Diagnostic Table
        • Test Descriptions
        • Diagnostic Table Notes
        • Diagnostic Table
  • 6 Service Operations
    • 6.1 Body Control Module
      • Mounting Location
      • BCM Preliminary Information
      • Remove
        • Access to BCM without Disconnection
        • Removal
      • Reinstall
        • Original BCM
        • Replacement BCM (New)
      • BCM Relearn Procedure
    • 6.2 Remote Coded Key
      • Key Replacement
    • 6.3 Power Window A and B Door Pillar Wiring Loom Connectors
      • A Pillar X500 and X600 Connectors
        • Remove
        • Reinstall
      • B Pillar X700 and X800 Connectors
        • Remove
        • Reinstall
    • 6.4 Bulb Re-learn Procedure Rear Lamp Warning Failure System
  • 7 Torque Wrench Specifications
  • 8 Special Tools