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Switches & Sensors

Anti-lock Braking System (ABS) Sensor

Troubleshooting

 
  • Symptoms:
    • ABS warning light will appear
    • Wheel traction decreases
  • Possible causes for failure:
    • Heat damage
    • Contaminants damaging the sensor
    • Damage during replacement of braking components

Testing:

To test individual sensors each wheel must be jacked/raised off the ground. This will enable you to access the sensors easily and safely as they are located behind each wheel.

  1. At this stage you should perform visual checks on the sensor. Look for damage to the pins and wiring as these are the first signs of a faulty ABS sensor.
  1. The next step is to measure the resistance of the sensor using a multimeter. You can do this by connecting the probes to the sensor end of the ABS sensor wire.
  1. Measure the resistance when the wheel is stationary and then rotate the wheel in an anti-clockwise direction. If the resistance changes the sensor is operating correctly.
  1. If no measurement is registered then the next check is to measure the voltage going to the sensor. For this you will need to attach flying leads to the connector pins and then plug the sensor back in.
  1. At this point the ignition should be turned on so that power is supplied to the ABS system. Rotate the wheel, and if the voltage changes this means that the sensor is working. If the voltage does not change, this suggests that there is a problem with the wiring.

Common Fault Codes

  • C0060 Left Front ABS Solenoid #1 Circuit Malfunction
  • C0065 Left Front ABS Solenoid #2 Circuit Malfunction
  • C0070 Right Front ABS Solenoid #1 Circuit Malfunction
  • C0075 Right Front ABS Solenoid #2 Circuit Malfunction
  • C0080 Left Rear ABS Solenoid #1 Circuit Malfunction
  • C0085 Left Rear ABS Solenoid #2 Circuit Malfunction
  • C0090 Right Rear ABS Solenoid #1 Circuit Malfunction
  • C0095 Right Rear ABS Solenoid #2 Circuit Malfunction

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