F355 M5:2 Suspension light on | FerrariChat
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F355 M5:2 Suspension light on

Discussion in '348/355' started by Klas, Mar 23, 2017.

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  1. Klas

    Klas Formula Junior

    Mar 17, 2014
    364
    Gothenburg, Sweden
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    Klas Nilsson
    #1 Klas, Mar 23, 2017
    My amber suspension failure light is on. I checked the 4 red Bilstein electrical motors and one was broken. Got it repaired by CaptainZ, reinstalled it and went for a calibration ride. Unfortunately it is still on. ****.... Read out all DTC's earlier before fixing the red motor and it was many. Don't have a reader available now, so what could be the next logical step? Ideas? The Bilstein ECU in the passenger fuse box area?

    Pls advice.
     
  2. PhilB

    PhilB Formula 3
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    #2 PhilB, Mar 23, 2017
    Klas - make sure all 4 actuators are seated correctly on the top of each shock. Also, closely examine each shock's adjuster gears, especillay on the shock that had the broken actuator originally.
     
  3. Klas

    Klas Formula Junior

    Mar 17, 2014
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    Klas Nilsson
    #3 Klas, Mar 23, 2017
    Thanks for input, but I did this very carefully - twice actually. Also checked that all 4 motors where operating when turning ignition on. Exchanged the tiny metal gear wheel too where the broken motor was.
     
  4. tr512

    tr512 Formula 3

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    #4 tr512, Mar 23, 2017
    check to see how much each one is turning side to side.I had one repaired by them that worked.But it was turning to much side to side which set off the light.I sent it back to them and they said it was o/k but it wasn't because when i replaced it with a used one that turned the same amount side to side the light went out.Also check the little gears on top of the shocks.
    If you need a good used one i have one. Its good to have a spare in the car $225.00
     
  5. Klas

    Klas Formula Junior

    Mar 17, 2014
    364
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    Klas Nilsson
    #5 Klas, Mar 23, 2017
    Ok, will check again. Might be interested in the spare motor you have. Is it with original plastic gear inside?
     
  6. tr512

    tr512 Formula 3

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    #6 tr512, Mar 23, 2017
    Yes
     
  7. Klas

    Klas Formula Junior

    Mar 17, 2014
    364
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    Klas Nilsson
    #7 Klas, Mar 23, 2017
    Anyone then have experience of how likely it might be a faulty ECU or accelerometer instead of the red motors?
     
  8. tr512

    tr512 Formula 3

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    #8 tr512, Mar 23, 2017
    If all four motors are turning i can't see it being your ECU.
     
  9. taz355

    taz355 F1 Veteran
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    #9 taz355, Mar 23, 2017
    likely a motor as said above
     
  10. Redlyne_mr2

    Redlyne_mr2 Formula Junior

    Aug 5, 2009
    474
    Calgary, Alberta
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    #10 Redlyne_mr2, Mar 23, 2017
    Hows the temperature in your garage? I notice when the car has sat all winter and is "cold" the suspension error light comes on. When things warm up the gears operate normally and all is good.
     
  11. taz355

    taz355 F1 Veteran
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    #11 taz355, Mar 23, 2017
    Are you sure its the temperature. The wsm states if you turn your ke on or start the car a few times without moving the light also comes on.
     
  12. taz355

    taz355 F1 Veteran
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    #12 taz355, Mar 23, 2017
    How many keyon and offs before driving!!

    As stated the light comes on if you turn the key on or start the car a few times without moving.
     
  13. Klas

    Klas Formula Junior

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    #13 Klas, Mar 24, 2017
    A lot of good thoughts. Thanks. I have around 60-70 F in my garage all year. Yes, as all motors are moving back and forth when ignition goes on, it might not be the ECU then. But there is also the accelerometer pn 154310 in the system. I guess it can break too.... anyone having experience of a faulty accelerometer?
     
  14. tr512

    tr512 Formula 3

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    #14 tr512, Mar 24, 2017
    Yes
    But are they moving the same amount side to side? pay special attention to the one you had rebuilt.If they are, then try this cut off your battery switch then turn it on and re/start your car.
     
  15. darrenliu

    darrenliu Formula Junior

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    #15 darrenliu, Mar 25, 2017
    I've had a faulty accelerometer, but they can't really go bad unless you have a front impact smash that breaks something inside the little metal box. this is what happened to mine and the car kept blowing a fuse. Other than that, the part looks bullet proof (I've taken it apart looked inside).
     
  16. Klas

    Klas Formula Junior

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    #16 Klas, Mar 25, 2017
    Ok, and as my car have not experienced any crash (yet) it might not be that one. Most likely it's then the calibration between all suspension motors.
     
  17. phrogs

    phrogs F1 Veteran
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    #17 phrogs, Mar 25, 2017
    Any time.you replace this crap that uses a ecu you have to reset the computer.

    As in disconect the battery did.you do that or just plug in the repaired motor?
     
  18. tr512

    tr512 Formula 3

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    #18 tr512, Mar 25, 2017
    +1
    I guess this guy just don't listen..lol
     
  19. Klas

    Klas Formula Junior

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    #19 Klas, Mar 26, 2017
    I did switch off the battery too, but will do it once again before I go for next ride.
     
  20. MicroFirm

    MicroFirm Karting

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    #20 MicroFirm, Mar 26, 2017
    Apparently you have to switch it off for 45 minutes to an hour to let all the capacitors in the system fully discharge so you can a properly reset system.
     
  21. Klas

    Klas Formula Junior

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    #21 Klas, Mar 26, 2017
    I'll try that. :)
     
  22. Klas

    Klas Formula Junior

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    #22 Klas, Mar 27, 2017
    ? Not listening, but reading.... :)
     
  23. Klas

    Klas Formula Junior

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    #23 Klas, Mar 27, 2017
    Last edited: Mar 27, 2017
    Does anyone also have experience if it matter where the position of the steel axle in the shock is, when installing the red motor on top of it? It feels like it must be of importance if the axle is max to left or right or somewhere in between, when one puts the motor on it.
     
  24. PhilB

    PhilB Formula 3
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    #24 PhilB, Mar 27, 2017
    That doesn't matter. The purpose of the actuator moving back and forth on startup is to find the extent of gear movement in both directions.

    I think one of your shock gears is broken. Are you able to spin any of them 360 degrees in either direction?
     
  25. jochem00

    jochem00 Formula Junior

    Jun 19, 2014
    344
    Netherlands
    #25 jochem00, Mar 28, 2017
    Drive to the Ferrari dealer and have the suspension ECU reset.
     
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