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Old 2018-10-18, 18:23   #1
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Standartinis MERCEDES ML W163 ABS ETS BAS problemos sprendimas

ABS ETS BAS 4ETS Problem DIY Repair Instructions for Mercedes Benz


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STAR Diagnostics: C1401 High-Pressure Return Pump Circuit Open/Shorted; Will Not Shut Off

Difficulty: 6 (1 being easy and 10 being hard )
Time:2-3 hours
Repair Cost: DIY Cost – Less than $20

Parts You’ll Need:
ML ABS Bearing
12mm x 5 mm x 5 mm Carbon BrushesBackground
Your ABS/ETS/BAS lights just came on your Mercedes Benz and you almost had a hard attack. Don’t panic. There are a few reasons why you are seeing these lights and you can do some of those repairs yourself.

Possible causes for ABS ETS BAS light are:

Bad Brake Switch
Defective Speed wheel sensor
Failed Relay K25
Bad ABS Motor (4ESP)
On this DIY article we will focus on repairing the ABS motor (4ESP). This repair could cost around $3,000 at the dealer or around $2,000 at an auto repair shop. If you have some DIY repair skills then you are looking at about $20. That’s right $20.



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This is a very common problem on ML W163. A couple of years ago I posted this solution on a Mercedes Benz forum and I am glad to see that it has helped a lot of people. Even though other models are not affected as much, this fix applies to any other Mercedes Benz model. Even to other makes for that matter.

Diagnostic Steps:

Locate the ABS pump on your Mercedes Benz. On the ML it is located on the front left behind the driver’s side headlight. Next to the washer fluid reservoir.
View Location of ABS Pump on W163
Find the relay that runs the ABS pump. If you look at your fuse box it will be marked ABS Pump or ABS Motor or 4EPS.
On the ML W163 it is K25. Located under the hood, in front of the driver.
2013-07-24_110824
Manually get the ABS motor to run by jumping the wires on ABS Relay socket.

If the ABS motor doesn’t run when you jump the relay then move to the next section.
DIY – ABS Motor Repair Steps
Disconnect battery.
Remove driver side front wheel and wheel liner off for access on the ML. Another alternative would be to remove the reservoir to get some space to take out the ABS pump.
IMAG0048
Unscrew the bolts that hold the pump to ABS control valve unit. Two T25 torx bolds on each side of the motor in the ML. Be careful not to strip them. They strip easily, don’t ask how I know.
p2
Pull the ABS motor straight out. At the center of the ABS module there is an O “cap” metal ring. Be careful not to pull that out with the ABS motor. If you pull the ABS motor ½ inch out then put a long screwdriver in the gap pointing toward the shaft of the motor. This will help and will avoid the cap coming out with the motor.
Remove rotor from motor housing. A couple of methods:
Use a flat head screwdriver to pull out the black plastic from the metal motor housing. Once the central piece is loose you will have to pull hard to remove it. The magnet inside will want to hold the rotor in place.
Put the shaft on a vice, make sure you not to damage the shaft by over tightening it. Pull on motor.
IMAG0049
Use a puller to remove the bearing on the ABS motor. I reused mine. If you need one, you can use NAPA 6001-2RSJ or 6001ZZE Nachi Bearing Shielded C3 from Amazon
You can rent this puller from Advance Auto Parts or AutoZone or you can be creative when removing the bearing. Or you could also purchase one on Amazon.puller
Inspect the brushes and replace if necessary. Remove the old brushes. Cut the copper braid flush with the surface of the old brush. The old brush will pop out. Cut the other end of the copper braid around 1/4″ from the support molded into the plastic cover on each side.These brushes are completely gone.
IMAG0047
Install new brushes.
Reinstall in reverse order.
Last step: Start the car and turn the steering wheel clock to clock a couple of times to reset the lights.
Conclusion
The repair is very straight forward but the repair requires a certain level of experience. If you feel uncomfortable doing this repair, consider just removing the ABS motor and sending it in for repair to any of the Mercedes-Benz ABS pump repair service
HINTS:

You can rent the following bearing puller in the picture from Autozone.
The magnetic field will pull the rotor back to the housing. Try not to damage jelly O-ring which insulates the rotor and the housing.
Can the car be driven without the pump in while I work on it? Though we strongly would NOT recommend this you can drive the truck without the pump. At your own risk!
What are the part numbers of the brushes and where can I get them?
Applicable Part Number (there could be more): A 163 545 97 32 A 163 431 07 12

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Old 2018-10-18, 18:52   #2
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Old 2018-11-06, 15:09   #3
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Žiedas,nuo kurio skaičiuoja ABS daviklis,plastmasinis ar metalinis?

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