Aurora 2001-2003

Bleeding the ABS System

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  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Perform a manual or pressure bleeding procedure.
    1. If the desired brake pedal height results are not achieved, perform the auto bleed procedure below.
      NOTE
      The Auto Bleed Procedure may be terminated at any time during the process by pressing the EXIT button. No further Scan Tool prompts pertaining to the Auto Bleed procedure will be given. After exiting the bleed procedure, relieve bleed pressure and disconnect bleed equipment per manufacturer's instructions. Failure to properly relieve pressure may result in spilled brake fluid causing damage to components and painted surfaces.



      The procedure cycles the system valves and runs the pump in order to purge the air from the secondary circuits normally closed off during non ABS/TCS mode operation and bleeding. The auto bleed procedure is recommended when air ingestion is suspected in the secondary circuits, or when the BPMV has been replaced.
       

    2.  

  4.  
  5. Raise the vehicle on a suitable support.
  6.  
  7. Remove all 4 tire and wheel assemblies.
  8.  
  9. Inspect the brake system for leaks and visual damage. Repair or replace as needed.
  10.  
  11. Inspect the battery state of charge.
  12.  
  13. Install a scan tool.
  14.  
  15. Turn ON the ignition, with the engine OFF.
  16.  
  17. With the scan tool, establish communications with the ABS/TCS system. Select Special Functions from the ABS/TCS menu. Select Automated Bleed from the Special Functions menu.
  18.  
  19. Bleed the base brake system.
  20.  
  21. Follow the scan tool directions until the desired brake pedal height is achieved.
  22.  
  23. If the bleed procedure is aborted, a malfunction exists. Perform the following steps before resuming the bleed procedure:

    If a Diagnostic Trouble Code, diagnose the appropriate DTC.
     
    If the brake pedal feels spongy, perform the conventional brake bleed procedure again.
     

  24.  
  25. When the desired pedal height is achieved, press the brake pedal in order to inspect for firmness.
  26.  
  27. Remove the scan tool.
  28.  
  29. Install the tire and wheel assemblies.
  30.  
  31. Inspect the brake fluid level.
  32.  
  33. Road test the vehicle while inspecting that the pedal remains high and firm.
  34.  

 
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