Antilock Brake System (ABS) Verfication Test

Antilock Brake System (ABS) Verfication Test - To avoid possible serious or fatal injury, check brake capability is available before road testing.

ABS VERIFICATION TEST



ABS verification test


Note : If the Antilock Brake System (ABS) Module, Clockspring/Steering Angle Sensor (SAS), or Dynamics Sensor were replaced, or if any mounting problems with Clockspring/SAS or Dynamics Sensor, ABS Module must be ''Initialize'' using the scan tool. If not initialized, the ABS indicator will flash continuously with no DTC. To initialize the ABS Module and clear offsets have wheel pointing straight ahead and follow the directions on the scan tool. The drive test requires a 90° turn. If the Dynamics sensor was replaced, test drive the vehicle by turning the vehicle left or right in a curving manner at a velocity between 10 and 25 km/h (6 and 15 mph).


  • Turn the ignition off.
  • Connect all previously disconnected components and connectors.
  • Verify all accesories are turned off and the battery is full charged.
  • Verify that the ignition is on, with the scan tool, erase all Diagnostic Trouble Codes from all modules. Start the engine and allow it to run for two minutes and fully operate the system that was indicating the failure.
  • Turn the ignition off and wait five seconds. Turn the ignition on and using the scan tool, read DTC from all Modules.
  • If any Diagnostic Trouble Codes are present, return to symptom list and trouble shoot new or recurring symptom.

Note : For sensor signal and Pump Motor faults, the ABS Module must sense all 4 wheels at 12 km/h (7.5 mph) before it will extinguish the ABS indicator.

  • If there are no DTC present after turning ignition on, road test the vehicle for least five minutes. Perform several antilock braking stops.
  • Again, with the scan tool read DTC. If any DTC are present, refer to the Table Of Content in the applicable section for the diagnostic test procedure and troubleshoot the new or recurring symptom.
  • If there are no Diagnostic Trouble Codes (DTC) present, and the customers concern can no longer be duplicated, the repair is complete.
Are any DTC present or is the original concern still present ?

Yes, repair is not complete, perform the appropriate diagnostic (sitemap-DTC C codes (ABS) Module).
No, repair is complete.

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