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ABS fault rectified
300Se W126
For some time the ABS pump was activating the left brake when slowing to a gentle stop. Checking the resistance of the front Left and Right sensors showed approximately a similar reading, however the left wheel showed a very low voltage being generated as compared to the right one, the wheels spun by hand . On removing the sensor it showed the tip ends to be slightly bend ,i carefully straightened the tips to the horizontal position of the right sensor and the ABS was back to normal operation. mak
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#2
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good info to share, thanks
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85 300 SD ~ 115K 82 500 SEC Euro ??K 78 450SL 164K |
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Quote:
I have this exact issue with my 190d. Could you go more into detail as to how you did the readings? Initially, I thought that my brake lines were swollen and causing an uneven braking pattern but I think you just solved it.
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Ben 1987 190d 2.5Turbo |
#4
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Ben
Starting from the front callipers follow the black leads up into the engine bay where they will terminate into a big connector on each side ,these can be pried apart after pulling away from the retaining clips .The resistance readings are taken at the connector half from the calliper lead . For the voltage readings set the meter to the lowest readings on the AC scale spin the wheel and the voltage should be similar on both sides. hope this helps to rectify the fault. mak
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#5
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This is very helpful information!
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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine) 1988 F150 144,000 miles (leaks all the colors of the rainbow) Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra |
#6
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Initially, I thought that my brake lines were swollen and causing an uneven braking pattern but I think you just solved it.[/QUOTE]
In addition to above mentioned testing ,the sensor mounting plates can develop corrosion due to salt or high humidity. this impedes the ground connection though the calliper bolts. Symptoms are similar ,slow speed ABS Activation. Cleaning the plates to ensure a good ground will rectify the activation fault. regards mak
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