Chrysler Front Wheel Drive Cars 4-CYL 1981-1995 Repair Information

Bleeding The ABS System

Print

BOOSTER BLEEDING



Bosch III ABS

Only the Bosch III ABS system might require bleeding of the booster.

  1. The hydraulic accumulator must be depressurized.
  2.  
  3. Connect all pump/motor and hydraulic assembly electrical connections, if previously disconnected. Be sure all brake lines and hose connections are tight.
  4.  
  5. Fill the reservoir to the full level.
  6.  
  7. Connect a transparent hose to the bleeder screw location on the right side of the hydraulic assembly. Place the other end of the hose into a clear container to receive brake fluid.
  8.  
  9. Open the bleeder screw 1 / 2 - 3 / 4 of a turn.
  10.  
  11. Turn the ignition switch to the ON position. The pump/motor should run, discharging fluid into the container. After a good volume of fluid has been forced through the hose, an air-free flow in the plastic hose and container will indicate a good bleed.
  12.  
  13. Turn the ignition switch OFF .
  14.  

If the brake fluid does not flow, it may be due to a lack of priming the pump/motor. Try shaking the return hose to break up air bubbles that may be present within the hose.

  1. Should the brake fluid still not flow, turn the ignition switch to the OFF position. Remove the return hose from the reservoir and cap nipple on the reservoir. Manually fill the return hose with brake fluid and connect to the reservoir. Repeat the bleeding process.
  2.  
  3. Remove the hose from the bleeder screw. Tighten the bleeder screw to 7.61 inch lbs. (10 Nm). Do not overtighten.
  4.  
  5. Top off the reservoir to the correct fluid level.
  6.  
  7. Turn the ignition switch to the ON position. Allow the pump to charge the accumulator, which should stop after approximately 30 seconds.
  8.  

PRESSURE BLEEDING



This procedure is applicable to both the Bosch III and Bendix Type 10 ABS systems.

The brake lines may be pressure bled, using a standard diaphragm type pressure bleeder. Only diaphragm type pressure bleeding equipment should be used to bleed the system.

  1. The ignition should be turned OFF and remain OFF throughout this procedure.
  2.  
  3. Depressurize the hydraulic accumulator.
  4.  


CAUTION
Failure to depressurize the hydraulic accumulator, prior to performing this operation may result in personal injury and/or damage to the painted surfaces.

  1. Remove the electrical connector from fluid level sensor on the reservoir cap(s) and remove the reservoir cap(s).
  2.  
  3. Install the pressure bleeder adapter.
  4.  
  5. Attach the bleeding equipment to the bleeder adapter. Charge the pressure bleeder to approximately 20 psi (138 kPa).
  6.  
  7. Connect a transparent hose to the caliper bleed screw. Submerge the free end of the hose in a clear glass container, which is partially filled with clean, fresh brake fluid.
  8.  
  9. With the pressure turned ON , open the caliper bleed screw 1 / 2 - 3 / 4 turn and allow fluid to flow into the container. Leave the bleed screw open until clear, bubble-free fluid slows from the hose. If the reservoir has been drained or the hydraulic assembly removed from the vehicle prior to the bleeding operation, slowly pump the brake pedal 12 times while the bleed screw is open and fluid is flowing. This will help purge air from the hydraulic assembly. Tighten the bleeder screw to 7.61 inch lbs. (10 Nm).
  10.  
  11. Repeat Step 7 at all calipers. Calipers should be bled in the following order:
    1. Left rear
    2.  
    3. Right rear
    4.  
    5. Left front
    6.  
    7. Right front
    8.  

  12.  
  13. After bleeding all 4 calipers, remove the pressure bleeding equipment and bleeder adapter by closing the pressure bleeder valve and slowly unscrewing the bleeder adapter from the hydraulic assembly reservoir. Failure to release pressure in the reservoir will cause spillage of brake fluid and could result in injury or damage to painted surfaces.
  14.  
  15. Using a syringe or equivalent method, remove excess fluid from the reservoir to bring the fluid level to full level.
  16.  
  17. Install the reservoir cap and connect the fluid level sensor connector. Turn the ignition ON and allow the pump to charge the accumulator.
  18.  

MANUAL BLEEDING



This procedure is applicable to both the Bosch III and Bendix Type 10 ABS systems.

  1. Depressurize the hydraulic accumulator.
  2.  


CAUTION
Failure to depressurize the hydraulic accumulator, prior to performing this operation may result in personal injury and/or damage to the painted surfaces.

  1. Connect a transparent hose to the caliper bleed screw. Submerge the free end of the hose in a clear glass container, which is partially filled with clean, fresh brake fluid.
  2.  
  3. Slowly pump the brake pedal several times, using full strokes of the pedal and allowing approximately 5 seconds between pedal strokes. After 2 or 3 strokes, continue to hold pressure on the pedal, keeping it at the bottom of its travel.
  4.  
  5. With pressure on the pedal, open the bleed screw 1 / 2 - 3 / 4 turn. Leave the bleed screw open until fluid no longer flows from the hose. Tighten the bleed screw and release the pedal.
  6.  
  7. Repeat this procedure until clear, bubble-free fluid flows from the hose.
  8.  
  9. Repeat all steps at each of the calipers. Calipers should be bled in the following order:
    1. Left rear.
    2.  
    3. Right rear.
    4.  
    5. Left front.
    6.  
    7. Right front.
    8.  

  10.  
  11. Install the reservoir cap and connect the fluid level sensor connector. Turn the ignition ON and allow the pump to charge the accumulator.
  12.  

 
label.common.footer.alt.autozoneLogo