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• MODEL SELECTION INDEX
• VT SERIES I - COMMODORE, CALAIS SERVICE INFORMATION
• SECTION 12J-1 - LOW SERIES BODY CONTROL MODULE
  • 1. GENERAL DESCRIPTION
    • BODY CONTROL MODULE FEATURES
    • LOW SERIES BCM TERMINAL IDENTIFICATION
    • 1.1 SERIAL DATA COMMUNICATION (BUS MASTER)
      • GENERAL INFORMATION
      • SYSTEM OVERVIEW
      • INPUTS / OUTPUTS
      • INPUTS
    • 1.2 CENTRAL DOOR LOCKING SYSTEM
      • GENERAL INFORMATION
      • SYSTEM CHECK
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
      • LOCK TO UNLOCK OPERATION
      • UNLOCK TO LOCK OPERATION
      • UNLOCK TO DEADLOCK OPERATION
      • DEADLOCK TO UNLOCK OPERATION
    • 1.3 BOOT RELEASE
      • GENERAL INFORMATION
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
    • 1.4 THEFT DETERRENT SYSTEM
      • GENERAL INFORMATION
      • SYSTEM OPERATION
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
    • 1.5 HEATED REAR WINDOW CONTROL
      • GENERAL INFORMATION
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
    • 1.6 POWER WINDOW SYSTEM
      • GENERAL INFORMATION
      • SYSTEM CHECK
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
    • 1.7 ENGINE COOLING FAN, LOW SPEED CONTROL
      • SYSTEM OVERVIEW
      • GENERAL INFORMATION
    • 1.8 AUTOMATIC LIGHT CONTROL
      • GENERAL INFORMATION
      • CIRCUIT OPERATION
      • SYSTEM OVERVIEW
    • 1.9 WIPER SYSTEM
      • GENERAL INFORMATION
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
    • 1.10 DOME LAMP DELAY CONTROL
      • GENERAL INFORMATION
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
    • 1.11 AIR CONDITIONING INTERFACE
      • GENERAL INFORMATION
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
    • 1.12 CRUISE CONTROL INTERFACE
      • GENERAL INFORMATION
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
    • 1.13 SRS DEPLOYMENT VEHICLE SHUTDOWN
      • GENERAL INFORMATION
      • SYSTEM OVERVIEW
      • CIRCUIT OPERATION
  • 2. SERVICE OPERATIONS
    • 2.1 SAFETY AND PRECAUTIONARY MEASURES
    • 2.2 LOW SERIES BCM
      • REMOVE
      • REINSTALL
      • BCM LINK TO PCM
    • 2.3 REMOTE CODED KEY
      • PERFORMANCE CHECK
      • REPLACE
    • 2.4 REMOTE CODED KEY READER
      • REMOVE
      • REINSTALL
    • 2.5 REMOTE RECEIVER MODULE
      • REMOVE
      • REINSTALL
    • 2.6 DOOR LOCK ACTUATORS
    • 2.7 DOOR LOCK MICROSWITCHES
      • TEST
    • 2.8 TAILGATE & REAR COMPARTMENT LID ACTUATORS
    • 2.9 THEFT DETERRENT LED
    • 2.10 DOOR JAMB SWITCHES
      • REMOVE
      • REINSTALL
    • 2.11 HEADLAMP SWITCH
    • 2.12 HEADLAMP AND PARK LAMP RELAYS
    • 2.13 HEATED REAR WINDOW SWITCH
    • 2.14 HEATED REAR WINDOW RELAY
    • 2.15 IGNITION SWITCH
    • 2.16 VEHICLE SPEED SENSOR
    • 2.17 POWER WINDOW MOTORS
    • 2.18 FRONT AND REAR DOOR POWER WINDOW SWITCH
      • REMOVE
      • TEST
      • REINSTALL
    • 2.19 REAR DOOR POWER WINDOW SWITCHES
      • REMOVE
      • TEST
      • REINSTALL
    • 2.20 POWER WINDOW RELAYS AND CIRCUIT BREAKER
    • 2.21 ENGINE COOLING FAN LOW SPEED RELAY
    • 2.22 WINDSHIELD WIPER MOTOR
    • 2.23 WINDSHIELD WIPER/WASHER SWITCH
  • 3. TECH 2 DIAGNOSIS FOR BCM
    • 3.1 BASIC KNOWLEDGE REQUIRED
    • 3.2 CONNECTING TECH 2
    • 3.3 TECH 2 TEST MODES AND DISPLAYS FOR BCM DIAGNOSIS
      • F0: NORMAL MODE
      • F1: DIAGNOSTIC TROUBLE CODES
      • F2: DATA DISPLAY
      • F3: SNAPSHOT
      • F4: MISCELLANEOUS TESTS
      • F5: PROGRAM
      • F6: SECURITY
  • 4. DIAGNOSIS
    • 4.1 PREREQUISITES TO DIAGNOSIS AND TROUBLESHOOTING
      • PRELIMINARY SYSTEM REQUIREMENTS
      • SAFETY REQUIREMENTS
      • CHECKING EQUIPMENT
      • KEY READER CIRCUIT DIAGNOSIS
    • 4.2 SERIAL DATA COMMUNICATION
    • 4.3 CENTRAL DOOR LOCKING
      • GENERAL INFORMATION
      • SYSTEM CHECK
      • DIAGNOSTICS
      • FUNCTIONAL CHECK - CENTRAL DOOR LOCKING
      • PART A - UNLOCKING DOORS, DRIVER’S DOOR LOCK CYLINDER MICROSWITCH
      • PART B - LOCK DOORS, DRIVER’S DOOR LOCK CYLINDER MICROSWITCH
      • PART C - UNLOCK DOORS, DRIVER’S DOOR ACTUATOR (SNIB)
      • PART D - LOCK DOORS, DRIVER’S DOOR ACTUATOR (SNIB)
      • PART E - UNLOCK DOOR, PASSENGER DOOR ACTUATORS (SNIB)
      • PART F - LOCK DOORS, LHF PASSENGER DOOR ACTUATOR (SNIB)
      • PART G - UNLOCK TAILGATE
      • PART H - DEADLOCKING DOORS
      • PART I - UNLOCKING DOORS FROM DEADLOCK
    • 4.4 BOOT RELEASE
    • 4.5 THEFT DETERRENT
    • 4.6 REMOTE RECEIVER/KEY
    • 4.7 HEATED REAR WINDOW
    • 4.8 POWER WINDOW SYSTEM
    • 4.9 ENGINE COOLING FAN, LOW SPEED CONTROL
    • 4.10 AUTOMATIC LIGHTS OFF CONTROL
    • 4.11 WIPER CONTROL SYSTEM
    • 4.12 DOME LAMP DELAY CONTROL
    • 4.13 AIR CONDITIONING INTERFACE
    • 4.14 CRUISE CONTROL INTERFACE
    • 4.15 SRS DEPLOYMENT VEHICLE SHUTDOWN
  • 5. SPECIAL TOOLS