Fault Clearing

[Bradmc]

Hi All,

I had a wheel speed sensor fail on my D4 while in the bush, which caused the car suspension to lower and special programs to be disabled, among other system failures etc.

Question is: Would a Gap IID or Nanocom allow me to clear the faults and return those systems to get me out of trouble?

Cheers
Brad

[Tombie]

No. a component failure is just that...

However, a Llams system will allow suspension to be forced back up in such events.

[BobD]

I doubt that it would clear it without doing something else, because the error would return straight away. You either carry spare wheel speed sensors (as I do) or the GOE emergency air up kit (as I do) for remote travel, just in case. So far in 200,000km I haven't had to use them but that could change tomorrow! Graeme may be able to suggest a way to disable the sensors so the car thinks they are working. That would be great to know.

[Bradmc]

No. a component failure is just that...

However, a Llams system will allow suspension to be forced back up in such events.

Thanks Tombie.

So the llams will allow me to raise the suspension, however those other systems would still be in fault and not work? I understand the wheel sensor is a component and will remain non-functioning, was just wondering if the IID/Nano would allow the other non-component systems to be restored.

Cheers

[LRDisco_Fever]

If the sensor was completely kaput then clear in the fault won't help much. As stated above it will just return. BUT if it is just playing up, and failing intermitedly, then clear the fault and drive till it fault a again .... Repeat till can get the part.

[Bradmc]

I doubt that it would clear it without doing something else, because the error would return straight away. You either carry spare wheel speed sensors (as I do) or the GOE emergency air up kit (as I do) for remote travel, just in case. So far in 200,000km I haven't had to use them but that could change tomorrow! Graeme may be able to suggest a way to disable the sensors so the car thinks they are working. That would be great to know.

Thanks BobD.

LR are quoting 3hrs to replace the sensor as the need to remove the hub etc.. Is that something you could tackle being remote or would just need to as a necessity, if you get what i mean?

[PerthDisco]

Wondering if these items are all part of a 150-180k km suspension overhaul regime. Combined with lower arms, air shocks and CV boots etc.

Sounds like wheel speed sensors can fail early or go for ever?

[letherm]

I may be mistaken but I recall in a previous thread a while ago that someone bypassed the sensor by shorting the wires or something similar. Wiser heads will no doubt correct or confirm.

Martin

[BobD]

Thanks BobD.

LR are quoting 3hrs to replace the sensor as the need to remove the hub etc.. Is that something you could tackle being remote or would just need to as a necessity, if you get what i mean?

I wouldn't be able to remove the hub but there are usually people who can around the place somewhere and the correct part is important. That's when the emergency air up can get you out of the bush and to a repairer with a bit of luck. The Gap IID would identify which sensor is a problem and reset it but there is no guarantee it wouldn't fault again. Of course it might just be a one off and it might work for long enough to get you out of trouble so its always worth having a tool that can reset faults on hand.


Do you know what happened to the sensor? Did it get damaged off road or just fault for no apparent reason?

[LRD414]

I may be mistaken but I recall in a previous thread a while ago that someone bypassed the sensor by shorting the wires or something similar.

I reckon you're thinking of the brake wear sensor Martin.
I don't think the wheel speed sensor is as simple as just bridging out.
IIRC it's an analogue signal but could be wrong.

Cheers,
Scott