|Topic Review (Newest First)|
|06-18-2019 01:18 PM|
Originally Posted by WE47B1ME View Post
|06-18-2019 11:13 AM|
|06-18-2019 10:39 AM|
annnnnnd it's CLEAR :
Thank you very much to each person that read my topic and even more to those who answered and tried to help me (successfuly).
I now have a nicely working ML430 for 1070€ (70€ : price of the abs sensors).
The Autel MD802 is a nice device that I will surely use for my other cars :
|06-16-2019 02:08 PM|
Originally Posted by Witek_M View Post
that's what I did : )
|06-16-2019 01:35 PM|
|Witek_M||When you get broken sensor out clean its bore with wire brush and apply thin coat of silicone grease.|
|06-16-2019 12:26 PM|
Ok... So! I think we are arriving at the end of the story.
Usually, I don't bother about the things previous owners have done. And this time I shouldn't have made an exception :
Both ABS sensors seems to be ineffective :
In fact, I think that they are the other variant W163 received : active sensors.
Here is what I tried :
I removed a fully fonctional ABS sensor from the ML320 which has no issue at all :
I installed it on the ML430 and Magic happened : The fault is not pending any more and can be cleared.
I was not able to swap both side because of course, the second one was sized and broke when I tried removing it.
So I ordered 3 new ABS sensor with the genuine reference that was written on the ML320's abs sensors.
I wrongly supposed that they changed ABS sensors to try solve a previous issue but no... The replacement of the ABS sensors was the origin of the fault !
I'll come back to you as soon as I will have replaced the remaining ABS sensors and, fingers crossed, solved my issues.
Waiting this moment... Thanks everyone for your help !
|06-16-2019 11:22 AM|
In post #1 you said “both speed sensors are new”. Does this mean the previous owner replaced them recently? If so, did he give proof?
If you replaced them, were they genuine MB parts or not? Sometimes it makes a difference.
Whichever, assuming that the speed sensors and the ESP module are good, and you’ve checked the wiring for continuity, then you must have a short circuit somewhere or a bad connection (loose or damaged connector).
Trace the wiring back from the sensor looking for insulation damage (e.g. from rock strike) or just buy new connectors and wire and run a bypass.
|06-15-2019 11:19 AM|
For wheel speed sensors you are checking internal resistance and insulation resistance. I would like to add third test which is output of speed sensor. Connect meter as for internal resistance, put meter on 20V AC and rotate wheel by hand. Voltage should increase with wheel speed.
|06-15-2019 06:46 AM|
Originally Posted by DrX View Post
Originally Posted by 43sqd View Post
However since I have another ML, I can swap a speed sensor, just in case...
|06-15-2019 05:14 AM|
Replace the left wheel speed sensor. Clear all codes and then recheck for those that return.
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