Anti-Lock Brake System - 4WAL

• Description
• Operation
• Bleeding Brake System
  • Notes
  • EHCU Bleeding
  • Bleeding Sequence
• Trouble Shooting
  • Anti-Lock Warning Light
• Diagnosis & Testing
  • Testing Sequence
  • Pretest Checks
  • NGS Communications Check
  • Drive Cycle Test
• Diagnostic Tests
  • Test A: Abs Warning Light Failure
  • Test B: Brake Warning Light Failure
  • Test C: Isolation Valve, Dump Valve
  • Test D: Left Front Wheel Speed Sensor (Electrical/Static)
  • Test E: Left Front Wheel Speed Sensor (Dynamic)
  • Test F: Right Front Wheel Speed Sensor (Electrical/Static)
  • Test G: Right Front Wheel Speed Sensor (Dynamic)
  • Test H: Rear Axle Speed Sensor (Electrical/Static)
  • Test J: Rear Axle Speed Sensor (Dynamic)
  • Test K: Soft Or Excessive Pedal Travel
  • Test L: Pump Motor Circuit Failure
  • Test M: Internal Power Relay Failure
  • Test N: No Communication With ABCM
  • Test P: Wheel Speed Error (Dynamic)
  • Test R: Excessive Dump Time
• Symptom Tests
  • Notes
  • Abs Misfire, Too Sensitive, Engages On Normal Stop
  • Wheels Lock Up
  • Hard Or Soft Brake Pedal
  • Lack Of Deceleration During Medium/Hard Braking Application
  • Vehicle Pulls During Braking
  • Abs Warning Light On With System Pass
  • No Communications With ABCM
  • Red Brake Warning Light Does Not Self-Check
  • Red Brake Warning Light Stays On With Ignition In Run Position
  • Abs Warning Light Does Not Self-Check
• Intermittent Failures
  • Power/Ground To ABCM Failure
  • Indicator Failure
  • Sensor Failure
• Removal & Installation
  • Notes
  • Electronic Hydraulic Control Unit (EHCU)
    • Removal & Installation
  • Abs Control Unit (ABCM)
    • Removal & Installation
  • Front Wheel Speed Sensors
    • Removal & Installation
  • Rear Axle Speed Sensor
    • Removal & Installation
• Adjustments
• Torque Specifications
• Wiring Diagrams