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Thread: EAS system problem elimination

  1. #1
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    EAS system problem elimination

    I have been enjoying working on my new RR and fixing the EAS. I have now got the valve block working well, and replaced the rear bags, and today I am finding it wants to ride around at full extension and I think the orange light on the dash means the computer thinks its stuck on something. Does anyone know what possible causes for this are?



    dash light.JPGfaults 1.JPGriding high.JPG

  2. #2
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    could be the sensors. I believe the computer reads the value's of the sensors and when they detect that the axles are lower than they should, it will inflate the system to the max to force the axles down. It can be a hard problem to diagnose since the potmeters in the sensors are difficult to measure with a digital multimeter. If you have an analog version that would help. Usually it's intermittent contact on one of the potmeters that can cause this. I would check this first.

    Cheers,
    -P

  3. #3
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    Quote Originally Posted by prelude View Post
    could be the sensors. I believe the computer reads the value's of the sensors and when they detect that the axles are lower than they should, it will inflate the system to the max to force the axles down. It can be a hard problem to diagnose since the potmeters in the sensors are difficult to measure with a digital multimeter. If you have an analog version that would help. Usually it's intermittent contact on one of the potmeters that can cause this. I would check this first.

    Cheers,
    -P
    I had been reading about doing the sensor swap to engage new track, I will try that and see if that works

  4. #4
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    I found this line here

    "VEHICLE JUMPS TO WADE HEIGHT
    Check white plug behind Left Front foot well L/H panel for corrosion dampness. This is the
    connector from height selector switch to ECU. Also remove delay relay and inspect for dry solder
    joints. Check height calibration and ‘incorrect signal’ faults."

    from this pdf
    https://uploads.tapatalk-cdn.com/fil...s2028Rev29.pdf

    Not helped me just yet but I did give the white plug a clean

  5. #5
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    you can replace the delay relay with a standard "green" type relay and it will work almost the same, the only difference being that the computer wake up to re-level the car every so often will not activate. So to rule out that relay you can use any standard automotive relay in stead if you want to test that.

    Cheers,
    -P

  6. #6
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    Quote Originally Posted by prelude View Post
    you can replace the delay relay with a standard "green" type relay and it will work almost the same, the only difference being that the computer wake up to re-level the car every so often will not activate. So to rule out that relay you can use any standard automotive relay in stead if you want to test that.

    Cheers,
    -P
    Yes there is really no point having that auto levelling system other than to save embarrassment of a car sitting in an angle in the morning, but in my case the car wants to constantly go to top setting and cant lower at all

  7. #7
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    Well, you could try to fake it till you make it

    Carefully disconnect the arms of the sensors from their respective rubber blocks, I suggest greasing them up with some wd40 or something, and tie them up as if they were in the bottom position. You should be able to read the heights with that tool you got. Hope fully the car will understand the new readings and reset accordingly. This is a bit of a long shot so be careful that the system does not try to inflate the bags even further. Alternatively you can extend the sensor even further but at some point they will go out of range and that should give an error as well. With a bit of luck the car will lower itself to the bumpstops.

    Does you tool allow for resetting fault codes? It might be worth a try and even needed I think when you move the EAS system out of sensor range (if my memory serves).

    In any case, the eas system only knows that it's stuck from those 4 sensors so that is where to look.

    Cheers,
    -P

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    Quote Originally Posted by F4Phantom View Post
    I have been enjoying working on my new RR and fixing the EAS. I have now got the valve block working well, and replaced the rear bags, and today I am finding it wants to ride around at full extension and I think the orange light on the dash means the computer thinks its stuck on something. Does anyone know what possible causes for this are?



    dash light.JPGfaults 1.JPGriding high.JPG
    Wow looking at that fault list you have there I would try first clearing fault codes & do fresh setup of the EAS software & re read faults.
    If it comes up same try clearing again then remove - refit driver pack & check its connections. Cant see that all sensors are faulty at same time!!
    If still same result I would completely dismantle Valve block & check /thoroughly clean everything - replacing all O'rings - be very careful with the ones on the solenoids especially thin ones on stems make sure they are round not crimped & seated properly.
    hope this helps.
    Martin

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    Quote Originally Posted by FANTOM P38 View Post
    Wow looking at that fault list you have there I would try first clearing fault codes & do fresh setup of the EAS software & re read faults.
    If it comes up same try clearing again then remove - refit driver pack & check its connections. Cant see that all sensors are faulty at same time!!
    If still same result I would completely dismantle Valve block & check /thoroughly clean everything - replacing all O'rings - be very careful with the ones on the solenoids especially thin ones on stems make sure they are round not crimped & seated properly.
    hope this helps.
    Martin
    That fault list was from the EAS free version, since then I have used the proper cable from RSW and V4 software, now after clearing it it does not produce any faults. The suspension is still at its highest and when I click down, it will not lower then the light goes back to the top setting. Also one more thing is the RSW V4 software will not allow de pressurise so probably the v4 software is still not connecting or maybe the driver cant shift the valves, or perhaps its the sensors

  10. #10
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    Quote Originally Posted by prelude View Post
    Well, you could try to fake it till you make it

    Carefully disconnect the arms of the sensors from their respective rubber blocks, I suggest greasing them up with some wd40 or something, and tie them up as if they were in the bottom position. You should be able to read the heights with that tool you got. Hope fully the car will understand the new readings and reset accordingly. This is a bit of a long shot so be careful that the system does not try to inflate the bags even further. Alternatively you can extend the sensor even further but at some point they will go out of range and that should give an error as well. With a bit of luck the car will lower itself to the bumpstops.

    Does you tool allow for resetting fault codes? It might be worth a try and even needed I think when you move the EAS system out of sensor range (if my memory serves).

    In any case, the eas system only knows that it's stuck from those 4 sensors so that is where to look.

    Cheers,
    -P
    This is a good idea, ill have a play around with sensor heights and see if the software is reading them, at the moment I think it is, because it reads about right on bump stops and at full extension

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