ABS & Traction Control Fault. Are these linked faults?

[bearhouse]

Hi All,

I have an ABS and Traction Control Faults, warnings in IPK on. TOAF indicated front left sensor faulty. I replaced the sensor but both faults still present.

Question, are these faults linked or are they two separate faults and fixing one won’t necessarily fix the other?

I’ve looked at the Traction Control module and the teeth look fine in the viewing window and it appears to do the right things with the ignition first turned on.

I’m not sure what to look at next. A local garage who are not Rover 75 experts thought it was the ABS module faulty and suggested they could get it repaired for £300+.

I’m not sure what to do next but it help to know if the faults are linked.

Many thanks as always,

Terry

[Lee T]

Change the wheel bearing. There's a magnetic reluctor on the bearing that the sensor reads, if that is dirty or rusty the sensor can't see it and throws up the fault. Cheaper than an ABS module.

[stocktake]

Both have one thing in common front left wheel abs sensor and bearing, so odds are
sensor
chaffed wire to sensor
or wheel bearing

Cheap sensors from ebay and the like are known to be less reliable than reputable parts specialists. Also the seating of the sensor is critical.
It is possible the bearing has been damaged when cleaning out the sensor hole?

In all likelihood the faults are connected and you are in the right area.

[bearhouse]

I don’t think anything was damaged changing the sensor and the sensor is from an approved supplier but the bearing may be rusted. It is possibly to scrap the rust off the bearing through the hole where the sensor is mounted?

[Ducati750cc]

Originally Posted by bearhouse

I don’t think anything was damaged changing the sensor and the sensor is from an approved supplier but the bearing may be rusted. It is possibly to scrap the rust off the bearing through the hole where the sensor is mounted?

Is your speedo reading OK ?



Ref scraping off the rust, in a word, no, the reluctor or tone ring comprises of a series of magnetic segments, as these pass by the sensor tips they provide a signal.


On the N/S ( left ) this signal provides info for the ABS system and also the speedo.


The loss of signal can be caused by a wiring fault, a sensor fault or a contaminated, by metallic particles, ( rust ) reluctor ring and sensor tip.


All scraping rust off the bearing will do is make it worse, the rust has no where to go.


Before condemning the ABS pump etc you can check that the segments are being read, there is a great how-to by Arctic on here on how make up a simple rig to check that each single segment is being read, it only needs one segment not to be read and it will bring the mil light on and disable the ABS and any other systems that rely on an accurate signal.


If the signals are OK then the fault is further back.


Technically the reluctor ring can be easily cleaned of the contaminating particles, by the use of masking tape or Blu-tack but this depends on how getattable it is.

[SD1too]

Originally Posted by Ducati750cc

On the N/S ( left ) this signal provides info for the ABS system and also the speedo.

Your post is very helpful to the OP Bill but you mean "cruise control" for the NS sensor don't you. It's the OS sensor which drives the speedometer.

Simon

[bearhouse]

Yes, the speedo is working but the traction control and cruise control are not.

Regards,

Terry.

[Arctic]

Hi Terry.
Dave as given you your answer to the problem, it will be one of those most likely the bearing, seeing has the cruise and traction aren't do you for fact have traction?

Also, you have answer on your similar thread regarding the same.

https://www.the75andztclub.co.uk/for...d.php?t=322026

[Ducati750cc]

Originally Posted by SD1too

Your post is very helpful to the OP Bill but you mean "cruise control" for the NS sensor don't you. It's the OS sensor which drives the speedometer.

Simon

Thanks and yes you're correct, this comes when you try to multitask with a 1,000 questions a minute grandchild at your side.

[bearhouse]

Hi,

I’ve been advised that Arctic has a post on how to make an ABS Sensor tester. I’ve searched but can’t find it.

Any change of a link to it?

Regards,

Terry.