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• MODEL SELECTION INDEX
• VT SERIES I - COMMODORE, CALAIS SERVICE INFORMATION
• SECTION 12L - ANTI-LOCK BRAKING & ELECTRONIC TRACTION CONTROL
  • 1. GENERAL INFORMATION
    • 1.1 ANTI-LOCK BRAKING SYSTEM (ABS)
      • WHEEL SLIP
      • STEERING CONTROL
      • CORNERING FORCE
      • FACTORS AFFECTING BRAKING
    • 1.2 ELECTRONIC TRACTION CONTROL (ETC)
  • 2. GENERAL DESCRIPTION
    • 2.1 ABS AND ABS/ETC SYSTEM OVERVIEW
      • BASIC OPERATING PRINCIPLE
      • ABS CONTROL
    • 2.2 NORMAL CONDITIONS DURING ANTI-LOCK BRAKING AND TRACTION CONTROL INTERVENTION
    • 2.3 ABS AND ABS/ETC SYSTEM COMPONENTS
      • WHEEL SPEED SENSORS AND PULSE RINGS
      • ABS AND ABS/ETC CONTROL MODULE
      • HYDRAULIC MODULATOR
      • ABS WARNING LAMP
      • ELECTRONIC TRACTION CONTROL (ETC) WARNING LAMPS
      • ELECTRONIC TRACTION CONTROL (ETC) SWITCH
      • BRAKE MASTER CYLINDER
      • ABS & ETC FUSES
      • STOP LAMP SWITCH
    • 2.4 INSTALLATION POSITION OF ABS AND ABS/ETC COMPONENTS
      • ABS OR ABS/ETC HYDRAULIC MODULATOR INSTALLATION
      • MAIN WIRING HARNESS INSTALLATION TO ABS OR ABS/ETC
      • FRONT WHEEL SPEED SENSOR LEAD ROUTING
      • BODY HARNESS INSTALLATION TO ABS OR ABS/ETC
      • FRONT BRAKE LINE ROUTING
    • 2.5 ABS PRINCIPLES OF OPERATION - EXCLUDING ABS/ETC
      • NON-ANTI-LOCK BRAKING
      • ANTI-LOCK BRAKING
      • ABS CONTROL MODULE OPERATION
      • HYDRAULIC MODULATOR OPERATION
      • MASTER CYLINDER OPERATION
      • OPERATION AND TESTING OF THE ABS WARNING LAMP
    • 2.6 ABS/ETC PRINCIPLES OF OPERATION - EXCLUDING ABS
      • NON-ANTI-LOCK BRAKING / NON-TRACTION CONTROL
      • ANTI-LOCK BRAKING
      • ELECTRONIC TRACTION CONTROL
      • ABS/ETC CONTROL MODULE OPERATION
      • HYDRAULIC MODULATOR OPERATION
      • MASTER CYLINDER OPERATION
      • OPERATION AND TESTING OF THE ABS AND 'TRAC OFF' WARNING LAMPS
      • ABS AND TRAC OFF WARNING LAMPS
  • 3. SERVICE OPERATIONS
    • 3.1 SAFETY AND PRECAUTIONARY MEASURES
    • 3.2 FRONT WHEEL SPEED SENSOR LEAD
      • REMOVE
      • TEST
      • REINSTALL
    • 3.3 WHEEL SPEED SENSORS
      • FRONT WHEEL SPEED SENSOR
      • REAR WHEEL SPEED SENSOR
    • 3.4 PULSE RINGS
      • REMOVE
      • REINSTALL
    • 3.5 HYDRAULIC MODULATOR AND CONTROL MODULE ASSEMBLY
      • REMOVE
      • REINSTALL
    • 3.6 CONTROL MODULE
      • REMOVE
      • INSPECT
      • REINSTALL
    • 3.7 MASTER CYLINDER
      • REMOVE AND REINSTALL
      • OVERHAUL
    • 3.8 TRACTION CONTROL SWITCH (TRAC CTRL)
      • REMOVE
      • TEST
      • REINSTALL
  • 4. ABS, ABS/ETC DIAGNOSIS
    • 4.1 GENERAL DESCRIPTION
    • 4.2 BASIC KNOWLEDGE REQUIRED
    • 4.3 VISUAL INSPECTION
      • ABS, ABS/ETC VISUAL INSPECTION CHART
    • 4.4 ABS OR ABS/ETC FUNCTIONAL CHECK
      • ABS OR ABS/ETC FUNCTIONAL CHECK CHART
    • 4.5 INTERMITTENT FAILURES
    • 4.6 ABS & ABS/ETC SELF DIAGNOSTICS
      • DIAGNOSTIC TROUBLE CODES
      • FLASH CODE DIAGNOSTICS DISPLAY
      • ABS DIAGNOSTIC TROUBLE CODES (EXCLUDING ABS/ETC)
      • ABS/ETC DIAGNOSTIC TROUBLE CODES (EXCLUDING ABS)
      • CLEARING DTCS
    • 4.7 TECH 2 DIAGNOSTICS
    • 4.8 TECH 2 TEST MODES AND SCREEN DISPLAYS FOR ABS AND ETC DIAGNOSIS
      • F0: NORMAL MODE
      • F1: DIAGNOSTIC TROUBLE CODES
      • F2: DATA DISPLAY
      • F3: SNAPSHOT
      • F4: MISCELLANEOUS TESTS
    • 4.9 DIAGNOSTIC CHARTS
      • INTRODUCTION
      • ON-VEHICLE SERVICE
      • WIRING HARNESS CONNECTORS
      • CHART A1 - ABS WARNING LAMP INOPERATIVE
      • CHART A2 - TRAC OFF WARNING LAMP INOPERATIVE
      • CHART A3 - LOW TRAC WARNING LAMP INOPERATIVE
      • CHART B - POWER SUPPLY TO CONTROL MODULE (NO DTC'S STORED)
      • CHART C1 - ABS ‘OFF’ WARNING LAMP ILLUMINATED CONTINUOUSLY - (NO DTC'S STORED)
      • CHART C2 - TRAC OFF WARNING LAMP ILLUMINATED CONTINUOUSLY - (NO DTC'S STORED)
      • CHART C3 - LOW TRAC WARNING LAMP ILLUMINATED CONTINUOUSLY - (NO DTC'S STORED)
      • DTC 21 - FRONT RIGHT WHEEL SPEED SENSOR INCORRECT SIGNAL
      • DTC 23 - FRONT RIGHT WHEEL SPEED SENSOR SHORT CIRCUIT OR OPEN CIRCUIT
      • DTC 25 - FRONT LEFT WHEEL SPEED SENSOR INCORRECT SIGNAL
      • DTC 27 - FRONT LEFT WHEEL SPEED SENSOR SHORT CIRCUIT OR OPEN CIRCUIT
      • DTC 28 - WHEEL SPEED SENSOR FREQUENCY ERROR
      • DTC 31 - REAR RIGHT WHEEL SPEED SENSOR INCORRECT SIGNAL
      • DTC 33 - REAR RIGHT WHEEL SPEED SENSOR SHORT CIRCUIT OR OPEN CIRCUIT
      • DTC 35 - REAR LEFT WHEEL SPEED SENSOR INCORRECT SIGNAL
      • DTC 37 - REAR LEFT WHEEL SPEED SENSOR SHORT CIRCUIT OR OPEN CIRCUIT
      • DTC’S: 41, 42, 45, 46, 47, 48, 51, 52, 55 & 56 - SOLENOID VALVE CIRCUIT FAULTS
      • DTC 61 - PUMP MOTOR OR RELAY FAULT
      • DTC 62 - RPM SIGNAL FAULT
      • DTC 63 - VALVE SOLENOID RELAY CIRCUIT FAULT
      • DTC 67 - STOP LAMP SWITCH CIRCUIT FAULT
      • DTC 71 - CONTROL MODULE INTERNAL FAULT
      • DTC 72 - SERIAL DATA FAULT
      • DTC 73 - REQUESTED TORQUE CIRCUIT FAULT
      • DTC 74 - ACTUAL TORQUE CIRCUIT FAULT
      • DTC 78 - INCORRECT OPTION CODING
      • DTC 85 - SYSTEM VOLTAGE TOO LOW
  • 5. SPECIFICATIONS
  • 6. TORQUE WRENCH SPECIFICATIONS
  • 7. SPECIAL TOOLS