Help, car cant be driven properly - Traction control

[adm1n1strator]

| Model 323i U1 | Year 2011 SEDAN | Development Code E90 (MUE) | Type PG77 | Miles 95000



I cant drive this car as traction control is kicking all the time even when its clean dry and straight road and at very low speeds plus RPM . Nothing has changed except car was sitting for 1 month, as I was riding motorcycle.


I have disconnected battery, reconnected it and still same issue, I checked the code and this is the code


For now, I have completly disconnected the ABS module power/connector and now the traction control wont kick in at all but there are so many check lights on dash and wiper, odometer, speedometer wont work.


Is the ABS module shot on the car? is it easily replaceable, I see many on ebay, Does it need some special programming?


Please help me out, I have attached the video
Please check the video below i took during driving, the traction control light is blinking like crazy


https://youtu.be/Jgg7b0A3hcE

https://youtu.be/Jgg7b0A3hcE

[154e90]

This could easily be a bad input to the module, like a wheel speed sensor, instead of a bad module. You will need to look at the codes and potentially look at live data.

Sent from my SM-N950U1 using Tapatalk

[dworthy]

+1

First step will be to pull codes, not just toss money at the car.

[marvinstockman]

Until you can fix it, pull a wheel sensor connector, and it should shut down the whole system. Or there maybe a fuse you can pull. You'll still have brakes, just no ABS or traction.

[mandd]

Seeing that it is a 323i it is more than likely one of the rear drive axles. On this variant the drive axle tone ring on the end gets swollen due to corrosion which creates a high spot.

This high spot hits the ABS sensor and consequentially damages the sensor, when you check the faults, which you should, there possibly will be a fault logged for the left or right rear "speed signal implausible" and/or "wheel velocity".

The fix is to replace the drive axle and the affected speed sensor, conversely if cost is an issue, you can just replace the ABS sensor and shim it 1.5mm to avoid the high spot.

In the short term you can just turn off the traction control before each trip (push the button) and then then car can be driven without "traction control" intervention.

Mark


| Model 323i U1 | Year 2011 SEDAN | Development Code E90 (MUE) | Type PG77 | Miles 95000



I cant drive this car as traction control is kicking all the time even when its clean dry and straight road and at very low speeds plus RPM . Nothing has changed except car was sitting for 1 month, as I was riding motorcycle.


I have disconnected battery, reconnected it and still same issue, I checked the code and this is the code


For now, I have completly disconnected the ABS module power/connector and now the traction control wont kick in at all but there are so many check lights on dash and wiper, odometer, speedometer wont work.


Is the ABS module shot on the car? is it easily replaceable, I see many on ebay, Does it need some special programming?


Please help me out, I have attached the video
Please check the video below i took during driving, the traction control light is blinking like crazy


https://youtu.be/Jgg7b0A3hcE

https://youtu.be/Jgg7b0A3hcE

[adm1n1strator]

Seeing that it is a 323i it is more than likely one of the rear drive axles. On this variant the drive axle tone ring on the end gets swollen due to corrosion which creates a high spot.

This high spot hits the ABS sensor and consequentially damages the sensor, when you check the faults, which you should, there possibly will be a fault logged for the left or right rear "speed signal implausible" and/or "wheel velocity".

The fix is to replace the drive axle and the affected speed sensor, conversely if cost is an issue, you can just replace the ABS sensor and shim it 1.5mm to avoid the high spot.

In the short term you can just turn off the traction control before each trip (push the button) and then then car can be driven without "traction control" intervention.

Mark
hi, thanks so much
i disabled traction control and now I am able to drive it, its kind of fixed, my friend used his OBD scanner and we tried to see live data while car was running from the 4 wheels,
the scanner showed only mph speed data while car was running, all three wheels were showing same speed except the rear right wheel was jumping with speed by +15mph momentarily.

so i guess its not the ABS module, what else it could be now, is it the sensor now? what is it called?

[mandd]

You should get the faults read with a BMW specific scanner, however if you are seeing erroneous readings from the right rear then that may be the affected axle.

For the cause, it is what I previously described.........

""Seeing that it is a 323i it is more than likely one of the rear drive axles. On this variant the drive axle tone ring on the end gets swollen due to corrosion which creates a high spot.

This high spot hits the ABS sensor and consequentially damages the sensor, when you check the faults, which you should, there possibly will be a fault logged for the left or right rear "speed signal implausible" and/or "wheel velocity".

The fix is to replace the drive axle and the affected speed sensor, conversely if cost is an issue, you can just replace the ABS sensor and shim it 1.5mm to avoid the high spot.""



hi, thanks so much
i disabled traction control and now I am able to drive it, its kind of fixed, my friend used his OBD scanner and we tried to see live data while car was running from the 4 wheels,
the scanner showed only mph speed data while car was running, all three wheels were showing same speed except the rear right wheel was jumping with speed by +15mph momentarily.

so i guess its not the ABS module, what else it could be now, is it the sensor now? what is it called?

[JDStrickland]

If the issue is from a defective sensor, you ought to be able to shut the system down by pressing and holding the DTC button for 3 seconds. This is a pain because you must do it each time you start the car, but this is the method to disable the Traction Control. You are describing the car sensing wheel spin -- a drive wheel is turning faster than the front tires, this should cause a diagnostic code. This trouble will not appear to an OBD II scan tool.