Anti-Lock Brake System (Service Information)

• Electrical - Esp Electrical Diagnostics
  • Notes
  • Cab Internal Failure
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Voltage Of The Cab Fused B (+) Circuit
      • 2. Measure The Voltage Of The Cab Fused B (+) Circuit
  • Cab System UNDERVOLTAGE
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
      • 2. Measure The Battery Voltage
      • 3. Measure The Voltage Of The Fused B (+) Circuit
      • 4. Measure The Voltage Of The Fused B (+) Circuit
  • Cab System OVERVOLTAGE
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
      • 2. Measure The Battery Voltage
      • 3. Measure The Resistance Of The Ground Circuit
      • 4. Measure The Resistance Of The Ground Circuit
  • Can Bus Communication General Malfunction
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Resistance Of The Can C Bus (+) Circuit
      • 2. Measure The Resistance Of The Can C Bus (-) Circuit
  • No Can Communications With Pcm
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Resistance Of The Can C Bus (+) Circuit
      • 2. Measure The Resistance Of The Can C Bus (-) Circuit
  • No Can Communications With TCM
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Resistance Of The Can C Bus (+) Circuit
      • 2. Measure The Resistance Of The Can C Bus (-) Circuit
  • Pcm Not Identified Or Incorrect
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
  • Left Front Wheel Speed Sensor Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
      • 2. Inspect The Left Front Wheel Speed Sensor
      • 3. Measure The Voltage Of The Left Front Wheel Speed Sensor 12 Volt Supply Circuit
      • 4. Measure The Voltage Of The Left Front Wheel Speed Sensor 12 Volt Supply Circuit
      • 5. Measure The Resistance Between Ground And The Left Front Wheel Speed Sensor 12 Volt Supply Circuit
      • 6. Measure The Resistance Of The Left Front Wheel Speed Sensor 12 Volt Supply Circuit
      • 7. Measure The Resistance Of The Left Front Wheel Speed Sensor Signal Circuit
      • 8. Measure The Resistance Of The Left Front Wheel Speed Sensor Signal Circuit
      • 9. Measure The Resistance Of The Left Front Wheel Speed Sensor Signal Circuit
      • 10. Measure The Resistance Between Ground And The Left Front Wheel Speed Sensor Signal Circuit
      • 11. Measure The Resistance Between The Left Front Wheel Speed Sensor 12 Volt Supply Circuit And The Sensor Signal Circuit
      • 12. Visually Inspect Components For Damage And Correct Installation
      • 13. Monitor All Wheel Speed Sensors With The DRB III®
  • Right Front Wheel Speed Sensor Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
      • 2. Inspect The Right Front Wheel Speed Sensor
      • 3. Measure The Voltage Of The Right Front Wheel Speed Sensor 12 Volt Supply Circuit
      • 4. Measure The Voltage Of The Right Front Wheel Speed Sensor 12 Volt Supply Circuit
      • 5. Measure The Resistance Between Ground And The Right Front Wheel Speed Sensor 12 Volt Supply Circuit
      • 6. Measure The Resistance Of The Right Front Wheel Speed Sensor 12 Volt Supply Circuit
      • 7. Measure The Resistance Of The Right Front Wheel Speed Sensor Signal Circuit
      • 8. Measure The Resistance Of The Right Front Wheel Speed Sensor Signal Circuit
      • 9. Measure The Resistance Of The Right Front Wheel Speed Sensor Signal Circuit
      • 10. Measure The Resistance Between Ground And The Right Front Wheel Speed Sensor Signal Circuit
      • 11. Measure The Resistance Between The Right Front Wheel Speed Sensor 12 Volt Supply Circuit And The Sensor Signal Circuit
      • 12. Visually Inspect Components For Damage And Correct Installation
      • 13. Monitor All Wheel Speed Sensors With The DRB III®
  • Left Rear Wheel Speed Sensor Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
      • 2. Inspect The Left Rear Wheel Speed Sensor
      • 3. Measure The Voltage Of The Left Rear Wheel Speed Sensor 12 Volt Supply Circuit
      • 4. Measure The Voltage Of The Left Rear Wheel Speed Sensor 12 Volt Supply Circuit
      • 5. Measure The Resistance Between Ground And The Left Rear Wheel Speed Sensor 12 Volt Supply Circuit
      • 6. Measure The Resistance Of The Left Rear Wheel Speed Sensor 12 Volt Supply Circuit
      • 7. Measure The Resistance Of The Left Rear Wheel Speed Sensor Signal Circuit
      • 8. Measure The Resistance Of The Left Rear Wheel Speed Sensor Signal Circuit
      • 9. Measure The Resistance Of The Left Rear Wheel Speed Sensor Signal Circuit
      • 10. Measure The Resistance Between Ground And The Left Rear Wheel Speed Sensor Signal Circuit
      • 11. Measure The Resistance Between The Left Rear Wheel Speed Sensor 12 Volt Supply Circuit And The Sensor Signal Circuit
      • 12. Visually Inspect Components For Damage And Correct Installation
      • 13. Monitor All Wheel Speed Sensors With The DRB III®
  • Right Rear Wheel Speed Sensor Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
      • 2. Inspect The Right Rear Wheel Speed Sensor
      • 3. Measure The Voltage Of The Right Rear Wheel Speed Sensor 12 Volt Supply Circuit
      • 4. Measure The Voltage Of The Right Rear Wheel Speed Sensor 12 Volt Supply Circuit
      • 5. Measure The Resistance Between Ground And The Right Rear Wheel Speed Sensor 12 Volt Supply Circuit
      • 6. Measure The Resistance Of The Right Rear Wheel Speed Sensor 12 Volt Supply Circuit
      • 7. Measure The Resistance Of The Right Rear Wheel Speed Sensor Signal Circuit
      • 8. Measure The Resistance Of The Right Rear Wheel Speed Sensor Signal Circuit
      • 9. Measure The Resistance Of The Right Rear Wheel Speed Sensor Signal Circuit
      • 10. Measure The Resistance Between Ground And The Right Rear Wheel Speed Sensor Signal Circuit
      • 11. Measure The Resistance Between The Right Rear Wheel Speed Sensor 12 Volt Supply Circuit And The Sensor Signal Circuit
      • 12. Visually Inspect Components For Damage And Correct Installation
      • 13. Monitor All Wheel Speed Sensors With The DRB III®
  • Esp Yaw Rate Sensor Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Voltage Of The Esp Yaw Rate Sensor Signal Circuit
      • 2. Measure The Resistance Between The Esp Yaw Rate Signal Circuit And The 5-Volt Supply Circuit
      • 3. Measure The Resistance Of The Esp Yaw Rate Sensor Signal Circuit
      • 4. Measure The Resistance Between Ground And The Esp Yaw Rate Sensor Ground Circuit
      • 5. Measure The Voltage Of The 5-Volt Supply Circuit
      • 6. Measure The Resistance Between Ground And The Esp Yaw Rate Sensor Signal Circuit
      • 7. Measure The Resistance Between The Esp Yaw Rate Sensor Signal Circuit And The Sensor Ground Circuit
      • 8. Measure The Resistance Between Ground And The Esp Yaw Rate Sensor 5-Volt Supply Circuit
      • 9. Measure The Resistance Of The Esp Yaw Rate Sensor 5-Volt Supply Circuit
  • Steering Angle Sensor Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure Steering Angle Sensor Fused B (+) Circuit Voltage
      • 2. Measure The Steering Angle Sensor Signal Circuit Resistance
      • 3. Measure The Steering Angle Sensor Signal Circuit Resistance
      • 4. Measure The Voltage Of The Steering Angle Sensor Signal Circuit
      • 5. Measure The Steering Angle Sensor Ground Circuit Resistance
  • Esp Brake Pressure Sensor 1 Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Voltage Of The Esp Brake Pressure Sensor 1 Signal Circuit
      • 2. Measure The Resistance Between The Esp Brake Pressure 1 Signal Circuit And The 5-Volt Supply Circuit
      • 3. Measure The Resistance Of The Esp Brake Pressure Sensor 1 Signal Circuit
      • 4. Measure The Resistance Between Ground And The Esp Brake Pressure Sensor 1 Ground Circuit
      • 5. Measure The Voltage Of The 5-Volt Supply Circuit
      • 6. Measure The Resistance Between Ground And The Esp Brake Pressure Sensor 1 Signal Circuit
      • 7. Measure The Resistance Between The Esp Brake Pressure Sensor 1 Signal Circuit And The Sensor Ground Circuit
      • 8. Measure The Resistance Between Ground And The Esp Brake Pressure Sensor 5-Volt Supply Circuit
      • 9. Measure The Resistance Of The Esp Brake Pressure Sensor 5-Volt Supply Circuit
  • Esp Brake Pressure Sensor 2 Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Voltage Of The Esp Brake Pressure Sensor 2 Signal Circuit
      • 2. Measure The Resistance Between The Esp Brake Pressure 2 Signal Circuit And The 5-Volt Supply Circuit
      • 3. Measure The Resistance Of The Esp Brake Pressure Sensor 2 Signal Circuit
      • 4. Measure The Resistance Between Ground And The Esp Brake Pressure Sensor 2 Ground Circuit
      • 5. Measure The Voltage Of The 5-Volt Supply Circuit
      • 6. Measure The Resistance Between Ground And The Esp Brake Pressure Sensor 2 Signal Circuit
      • 7. Measure The Resistance Between The Esp Brake Pressure Sensor 2 Signal Circuit And The Sensor Ground Circuit
      • 8. Measure The Resistance Between Ground And The Esp Brake Pressure Sensor 5-Volt Supply Circuit
      • 9. Measure The Resistance Of The Esp Brake Pressure Sensor 5-Volt Supply Circuit
  • Esp Lateral Acceleration Sensor Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Voltage Of The Esp Lateral Acceleration Sensor Signal Circuit
      • 2. Measure The Resistance Between The Esp Lateral Acceleration Signal Circuit And The 5-Volt Supply Circuit
      • 3. Measure The Resistance Of The Esp Lateral Acceleration Sensor Signal Circuit
      • 4. Measure The Resistance Between Ground And The Esp Lateral Acceleration Sensor Ground Circuit
      • 5. Measure The Voltage Of The 5-Volt Supply Circuit
      • 6. Measure The Resistance Between Ground And The Esp Lateral Acceleration Sensor Signal Circuit
      • 7. Measure The Resistance Between The Esp Lateral Acceleration Sensor Signal Circuit And The Sensor Ground Circuit
      • 8. Measure The Resistance Between Ground And The Esp Lateral Acceleration Sensor 5-Volt Supply Circuit
      • 9. Measure The Resistance Of The Esp Lateral Acceleration Sensor 5-Volt Supply Circuit
  • Brake Lamp Switch Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure Brake Lamp Switch Voltage
      • 2. Measure The Resistance Between The Brake Lamp Switch And The Brake Lamp Relay
      • 3. Measure The Resistance Between The Brake Lamp Switch And The Cab
      • 4. Measure Brake Lamp Relay Voltage
      • 5. Measure The Resistance Between The Brake Lamp Relay And The Cab
      • 6. Measure Brake Lamp Relay Control Circuit Voltage
      • 7. Measure Brake Lamp Relay Control Circuit Voltage
      • 8. Measure Brake Lamp Relay Output Circuit Resistance
      • 9. Measure Brake Lamp Relay Output Circuit Voltage
      • 10. Measure Brake Lamp Relay Output Circuit Voltage
  • Abs Verification Test
  • Schematics And Diagrams
• Electrical - BAS Electrical Diagnostics
  • Notes
  • Cab Internal Failure
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Voltage Of The Cab Fused B (+) Circuit
      • 2. Measure The Voltage Of The Cab Fused B (+) Circuit
  • Cab System UNDERVOLTAGE
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
      • 2. Measure The Battery Voltage
      • 3. Measure The Voltage Of The Fused B (+) Circuit
      • 4. Measure The Voltage Of The Fused B (+) Circuit
  • Cab System OVERVOLTAGE
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
      • 2. Measure The Battery Voltage
      • 3. Measure The Resistance Of The Ground Circuit
      • 4. Measure The Resistance Of The Ground Circuit
  • Pcm Not Identified Or Incorrect
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. WITH THE DRB III®, READ DTCs
  • Can Bus Communication General Malfunction
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Resistance Of The Can C Bus (+) Circuit
      • 2. Measure The Resistance Of The Can C (-) Bus Circuit
  • No Can Communications With Pcm
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Resistance Of The Can C Bus (+) Circuit
      • 2. Measure The Resistance Of The Can C Bus (-) Circuit
  • BAS Release Switch Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Voltage Of The BAS Release Switch Sense (Applied) Circuit
      • 2. Measure The Resistance Between The BAS Release Switch Sense (Applied) Circuit And The Sense (Reference) Circuit
      • 3. Measure The Resistance Of The BAS Release Switch Sense (Applied) Circuit
      • 4. Measure The Resistance Between Ground And The BAS Release Switch 12 Volt Supply Circuit
      • 5. Measure The Voltage Of The Sense (Reference) Circuit
      • 6. Measure The Resistance Between Ground And The BAS Release Switch Sense (Applied) Circuit
      • 7. Measure The Resistance Between The BAS Release Switch Sense (Applied) Circuit And The 12 Volt Supply Circuit
      • 8. Measure The Resistance Between Ground And The BAS Release Switch Sensor (Released) Circuit
      • 9. Measure The Resistance Of The BAS Release Switch Sense (Released) Circuit
  • BAS Travel Sensor Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Voltage Of The BAS Travel Sensor Signal Circuit
      • 2. Measure The Resistance Between The BAS Travel Sensor Signal Circuit And The 5-Volt Supply Circuit
      • 3. Measure The Resistance Of The BAS Travel Sensor Signal Circuit
      • 4. Measure The Resistance Between Ground And The BAS Travel Sensor Ground Circuit
      • 5. Measure The Voltage Of The 5-Volt Supply Circuit
      • 6. Measure The Resistance Between Ground And The BAS Travel Sensor Signal Circuit
      • 7. Measure The Resistance Between The BAS Travel Sensor Signal Circuit And The Ground Circuit
      • 8. Measure The Resistance Between Ground And The BAS Travel Sensor 5-Volt Supply Circuit
      • 9. Measure The Resistance Of The BAS Travel Sensor 5-Volt Supply Circuit
  • Brake Lamp Switch Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure Brake Lamp Switch Voltage
      • 2. Measure The Resistance Between The Brake Lamp Switch And The Brake Lamp Relay
      • 3. Measure The Resistance Between The Brake Lamp Switch And The Cab
      • 4. Measure Brake Lamp Relay Voltage
      • 5. Measure The Resistance Between The Brake Lamp Relay And The Cab
      • 6. Measure Brake Lamp Relay Control Circuit Voltage
      • 7. Measure Brake Lamp Relay Control Circuit Voltage
      • 8. Measure Brake Lamp Relay Output Circuit Resistance
      • 9. Measure Brake Lamp Relay Output Circuit Voltage
      • 10. Measure Brake Lamp Relay Output Circuit Voltage
  • BAS Solenoid Valve Circuit
    • Circuit Diagram & Connector Identification
    • When Monitored and Set Condition
    • Possible Causes
    • Diagnostic Test
      • 1. Measure The Resistance Of The BAS Solenoid Valve 5-Volt Supply Circuit
      • 2. Measure The Resistance Of The BAS Solenoid Valve Control Circuit
      • 3. Measure The Resistance Of The BAS Solenoid Valve Circuits
      • 4. Measure The Voltage Of The BAS Solenoid Valve 5-Volt Supply Circuit
      • 5. Measure The Voltage Of The BAS Solenoid Valve Control Circuit
      • 6. Measure The Resistance Of The BAS Solenoid Valve 5-Volt Supply Circuit
      • 7. Measure The Resistance Of The BAS Solenoid Valve Control Circuit
• Brakes - Esp Service Information
  • Description
  • Operation - Electronic Stability Program (Esp)
    • Normal Braking
    • Abs Braking
    • Noise And Brake Pedal Feel
    • Tire Noise And Marks
    • Start-Up Cycle
    • Drive Mode
    • Premature Abs Cycling
    • Diagnosis And Testing - Inspection And Road Test
  • Specifications - Torque Chart
• Front Wheel Speed Sensor
  • Description
  • Operation
  • Removal
  • Installation
• Rear Wheel Speed Sensor
  • Description
  • Operation
  • Removal
  • Installation
• Lateral Acceleration Sensor
  • Description
  • Operation
  • Removal
  • Installation
• Steering Angle Sensor
  • Description
  • Operation
  • Removal
  • Installation
• Yaw Rate Sensor
  • Description
  • Operation
  • Removal
  • Installation
• Brake Pressure Sensor
  • Description
  • Operation
  • Removal
  • Installation
• Travel Sensor
  • Description
  • Operation
  • Removal
  • Installation
• Solenoid Valve
  • Description
  • Operation
  • Removal
  • Installation
• Release Switch
  • Description
  • Operation
  • Removal
  • Installation
• Hydraulic/Mechanical
  • Standard Procedure - Bleeding Abs Brake System
• HCU (Hydraulic Control Unit)
  • Description
  • Operation
  • Normal Braking Function
  • Abs Braking Function
  • Abs Traction Control Function
  • Removal
  • Installation