disappeaing EAS fault

Hi folks.....the latest in my p38 saga...

The other day I got the dreaded EAS 35mph fault. Had a quick look at the air springs and they seemed to be in good shape. I ordered a diagnostics cable from flea bay which came with the software. Did the fault read. It hit me with what must have been all of them. Did it again and it said FR height sensor. Tried the reset and the first time it did nothing. I used the software to pump her right up then completely depressured the whole system and reset again. This time no fault when I fired her up. Took her for a long run, on off road, slow speeds fast speeds and everything works fine.

My question is this. If the height sensors get out of range does this trigger the fault? If so is this common? Proabably an in built ploy by RR to keep their service agents in business. My local one wanted £80 just to read the fault!!!! Should I drive round with the laptop in the car? If I'm 100 miles from home next time it goes I don't fancy a trip home in something about as comfy as an Indian bullock cart!

Apart from that, the software is pretty good. might properly calibrate it at the weekend.

Mine has the habit of throwing the odd EAS hissyfit for no apparent reason, the faults can vary, and the distance between faults can be 1000's of miles. The most common has been an air supply fault, which I traced to dodgy contacts on the pump/loom plug, and a good clean and tighten sorted that. I tend to carry my laptop for work anyway so it's not an issue, I can just reset it, and it'll go on for another indeterminate period before splitting out another spurious fault, which clears easily and doesn't repeat.

TheCamelStory said:

Hi folks.....the latest in my p38 saga...

The other day I got the dreaded EAS 35mph fault. Had a quick look at the air springs and they seemed to be in good shape. I ordered a diagnostics cable from flea bay which came with the software. Did the fault read. It hit me with what must have been all of them. Did it again and it said FR height sensor. Tried the reset and the first time it did nothing. I used the software to pump her right up then completely depressured the whole system and reset again. This time no fault when I fired her up. Took her for a long run, on off road, slow speeds fast speeds and everything works fine.

My question is this. If the height sensors get out of range does this trigger the fault? If so is this common? Proabably an in built ploy by RR to keep their service agents in business. My local one wanted £80 just to read the fault!!!! Should I drive round with the laptop in the car? If I'm 100 miles from home next time it goes I don't fancy a trip home in something about as comfy as an Indian bullock cart!

Apart from that, the software is pretty good. might properly calibrate it at the weekend.

Click to expand...

The height sensor is just a variable resistor, most of the time it moves over a very small part of the total track length which gets worn and dirty. The signal then gets "noisy" or intermittant (like the volume control on a radio that crackles as you adjust the volume). The software in the EAS seems to be able to cope up to a point with this problem but will at times log it as a fault. Moving the suspension through its full range may have cleaned up the the bad spot for the moment but it will come back.

You can try removing the connector to the front right sensor and cleaning it, but you will at some point need to replace the sensor.

For security you can buy an EAS kicker from BBS, or do as I do on long trips, take the laptop.

Datatek said:

The height sensor is just a variable resistor, most of the time it moves over a very small part of the total track length which gets worn and dirty. The signal then gets "noisy" or intermittant (like the volume control on a radio that crackles as you adjust the volume). The software in the EAS seems to be able to cope up to a point with this problem but will at times log it as a fault. Moving the suspension through its full range may have cleaned up the the bad spot for the moment but it will come back.

You can try removing the connector to the front right sensor and cleaning it, but you will at some point need to replace the sensor.

For security you can buy an EAS kicker from BBS, or do as I do on long trips, take the laptop.

Click to expand...

just swap sensor to other side of vehicle, then its reading on new surface.

OK....bought lead of ebay, plugged in laptop and reset EAS. All works fine now....
I'm sure these things are in built to prop up up dealers with needless servicing. Still all working for 23 nicker.....yay

TheCamelStory said:

OK....bought lead of ebay, plugged in laptop and reset EAS. All works fine now....
I'm sure these things are in built to prop up up dealers with needless servicing. Still all working for 23 nicker.....yay

Click to expand...

It probably is is the Front Right sensor as reported by the software, it may run for quite a while before it goes again. Look at the thread "Height Sensors useless info" and you will see what happens to the resistive track in the sensor