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2000 Plymouth Breeze Question: Brakes goes to floor. ABS noisy

 

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purevenom1, 2.4L 4 Cylinder, Angier, NC, April 01, 2011, 11:30
 Rookie

Just had to change the transmission in the car and now a new problem has occured. When pressing the brakes the ABS pump is real noisy and brake pressure is greatly reduced. When applying the brakes it drops to the floor. Already rebled the system and still no luck. Could it be the CAB unit close to the power steering pump? What else could be causing the issue?

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, April 01, 2011, 12:17
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     Master

    I am not familiar with ABS on a Plymouth but on other cars this would be a sign of a bad brake master cylinder or if the ABS pump is constantly running or operates more frequently than it used to it would be a sign the accumulator was failing. There is a company that independent auto repair shops buy their information from that the same information inexpensively to do it yourselfers. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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    purevenom1, April 01, 2011, 13:19
     Rookie

    Thanks but I have the FSM on it but not the code reader for the ABS system. Just doesnt make sense sense to me that the trans and power steering unit was replaced and then the ABS started acting up. Its possible that it was a problem waiting to happen but its getting to be worse and worse. Checked all the wiring and such and everything is connected. Tried resetting the system and the light goes out but comes back on after a few minutes of driving for the road test. I am at a loss right now on this

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  • Answer #2

    April 07, 2011, 15:53
     Master

    First item to check are the wheel speed sensors. When replacing a transmission, it is easy to damage a wheel speed sensor when removing the axle shafts or damage the wiring to the sensors. Recheck all sensor wiring, connectors and the sensor itself. Also inspect the tone wheels on the axle shafts to make sure they are clean and not damaged. To properly bleed the ABS system, the use of a scan tool (DRB3) is required. This is a procedure that should be performed at your local dealership as the have the proper equipment. Here is a brief summary on the ABS Bleeding procedure. When bleeding the ABS system, the following bleeding sequence must be followed to insure complete and adequate bleeding.

    1.Make sure all hydraulic fluid lines are installed and properly torqued.
    2.Connect the DRB scan tool to the diagnostics connector. The diagnostic connector is located under the lower steering column cover to the left of the steering column.
    3.Using the DRB, check to make sure the CAB does not have any fault codes stored. If it does, clear them using the DRB
    WARNING: WHEN BLEEDING THE BRAKE SYSTEM WEAR SAFETY GLASSES. A CLEAR BLEED TUBE MUST BE ATTACHED TO THE BLEEDER SCREWS AND SUBMERGED IN A CLEAR CONTAINER FILLED PART WAY WITH CLEAN BRAKE FLUID. DIRECT THE FLOW OF BRAKE FLUID AWAY FROM YOURSELF AND THE PAINTED SURFACES OF THE VEHICLE. BRAKE FLUID AT HIGH PRESSURE MAY COME OUT OF THE BLEEDER SCREWS WHEN OPENED.

    4.Bleed the base brake system using the standard pressure or manual bleeding procedure.
    5.Using the DRB, select ANTILOCK BRAKES, followed by MISCELLANEOUS, then BLEED BRAKES. Follow the instructions displayed. When the scan tool displays TEST COMPLETED, disconnect the scan tool and proceed.
    6.Bleed the base brake system a second time. Check brake fluid level in the reservoir periodically to prevent emptying, causing air to enter the hydraulic system.
    7.Fill the master cylinder reservoir to the full level.
    8.Test drive the vehicle to be sure the brakes are operating correctly and that the brake pedal does not feel spongy.

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    purevenom1, April 07, 2011, 21:13
     Rookie

    Thanks I will recheck the connectors and such again. One other note is that when I removed the fuses from the ABS under the hood the brakes are fine right now. No pulsating in the pedal and no constant noise coming from ABS pump. Any other thoughts are greatly appreciated.

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