Headache
NAXJA Forum User
- Location
- The Netherlands
I have problems with the ABS on my (late) 1991 Cherokee. It has had the 702 recall and has, as far as I know, the notorious Bendix ABS-9 or -10 system.
The problems started after my wife had been in a traffic jam, causing her to keep the foot on the brake pedal for several minutes with the transmission in 'D'.
Directly after that, she parked the car and shut off the engine to do some shopping. After she returned and started the car again, the brake power assist was gone. When I made a test drive myself, I found out that the ABS pump did not work any more, only to find out that during a 2nd test drive, the ABS pump was working again, but now almost continuously. Frequently, the 'check antilock' control light flicks on and now and then, when there is no power assist, the red brake control light also lights up.
After 4(!) days of work, the mechanics of my dealer still have not been able to find the cause of the problem. The control unit indicates three errors:
- an error at one of the wheel sensors, but I can't imagine that this would affect the power assist
- 'accumulator low' when the brake control light is on
- an 'unknown' error.
The present situation is that about 50% of the time I have power assist. The dealer said that the ABS pump is o.k. as he has checked it separately. However, it will not always switch on when needed. According to the dealer, the cause can be about anything, including the wiring and he can give no indication of the costs of getting the d''ned thing repaired.
I unhooked the ABS control unit, but the problems remained.
On www.jeepforum.com, it was suggested that I should replace the whole ABS/brake system with a conventional one and this is what I intend to do. However, as I live in the Netherlands which is not particularly known for its outstanding and experienced jeep mechanics, I want to get as much input as possible. I read the article on http://www.naxja.org/html/techarticles/uninstall_OEM_ABS.htm.
My main question is: what could be the cause of the abovementioned troubles. Could it e.g. be a faulty pressure sensor?
In addition, all ideas or suggestions are welcome!
Thanks in advance,
Headache André
The problems started after my wife had been in a traffic jam, causing her to keep the foot on the brake pedal for several minutes with the transmission in 'D'.
Directly after that, she parked the car and shut off the engine to do some shopping. After she returned and started the car again, the brake power assist was gone. When I made a test drive myself, I found out that the ABS pump did not work any more, only to find out that during a 2nd test drive, the ABS pump was working again, but now almost continuously. Frequently, the 'check antilock' control light flicks on and now and then, when there is no power assist, the red brake control light also lights up.
After 4(!) days of work, the mechanics of my dealer still have not been able to find the cause of the problem. The control unit indicates three errors:
- an error at one of the wheel sensors, but I can't imagine that this would affect the power assist
- 'accumulator low' when the brake control light is on
- an 'unknown' error.
The present situation is that about 50% of the time I have power assist. The dealer said that the ABS pump is o.k. as he has checked it separately. However, it will not always switch on when needed. According to the dealer, the cause can be about anything, including the wiring and he can give no indication of the costs of getting the d''ned thing repaired.
I unhooked the ABS control unit, but the problems remained.
On www.jeepforum.com, it was suggested that I should replace the whole ABS/brake system with a conventional one and this is what I intend to do. However, as I live in the Netherlands which is not particularly known for its outstanding and experienced jeep mechanics, I want to get as much input as possible. I read the article on http://www.naxja.org/html/techarticles/uninstall_OEM_ABS.htm.
My main question is: what could be the cause of the abovementioned troubles. Could it e.g. be a faulty pressure sensor?
In addition, all ideas or suggestions are welcome!
Thanks in advance,
Headache André