News

360 Challenge ABS error on track

Discussion in 'Challenge/GT Cars' started by PFez81, Jun 10, 2019 at 6:56 AM.

  1. PFez81

    PFez81 Rookie

    Monday
    6
    Hi all, long time forum lurker, first time poster so please be nice! I run a 2001 360 challenge race car here in Australia and have been enjoying it immensely. So much better than any road car I have tracked previously. However, last outing I had an issue with the brakes and particularly the ABS. Coming into a hard breaking zone and applying the brakes as per usual I had a big lock up and slid off the track into the gravel. I popped both front tyres, so obviously my ABS didn’t work. Once I got the car back on the tarmac the dash was displaying “ABS ER” or something to that effect. Has anyone had any experience with this? I have been told it could be a faulty sensor on one wheel maybe? But would that cause the whole system not to operate? Shouldn’t I get some sort of warning prior to using the brakes maybe? Also, I spun the car 360 earlier in the day and I have been told that can sometimes effect the ABS operation as it needs recalibration. Appreciate any help that can be provided, thanks
     
  2. stevecomp

    stevecomp Formula Junior

    Mar 1, 2013
    727
    South Australia
    Full Name:
    Steve
    Have you changed the tyre size? You need to flick the ASR on and off a few times to reset the front/rear speeds as you pull away at low speed.

    Some say do figure of eights around a car park but ASR works for me.
     
  3. PFez81

    PFez81 Rookie

    Monday
    6
    Hi Stevecomp, we haven't changed the tyre size, I was able to clear the fault the first time by just switching off and then on again and then rolling forward. Are you saying that flicking the ASR on/off will hard reset the ABS? Once I had cleared the fault we changed tyres and went out again and the same fault occurred and brief lockup however I was quick enough to release the brakes and just slowly run off the track so only a small tyre flat spot. I have heard about the figure eights also. I'm interested to find out why the error occurred in the first place as I am concerned it will happen again and obviously I'll be burning through flat spot tyres. I was gong to try and get the error to trigger again and then bring to the mechanic to plug in and have a look at.
     
  4. stevecomp

    stevecomp Formula Junior

    Mar 1, 2013
    727
    South Australia
    Full Name:
    Steve
    If the tyre sizes have changed the ASR on off re calibrates wheel speed from and rear, if you don’t do that it can effect the ABS. Didn’t you say you changed the wheels first time?

    I run R rated Advan and slicks also being a road registered rally car and the tyre sizes change the ASR trick works for me.

    When are you out next?
     
  5. PFez81

    PFez81 Rookie

    Monday
    6
    Hi Stevecomp, no we only changed the tyres after the first ABS error due to the skid and resulting puncture. The error happened out of the blue which made me think that it was because of the earlier spin that messed with the ABS.
     
  6. stevecomp

    stevecomp Formula Junior

    Mar 1, 2013
    727
    South Australia
    Full Name:
    Steve
    So prior to that you hadn’t had the wheels off and the car was fine then?
     
  7. PFez81

    PFez81 Rookie

    Monday
    6
    That's correct. prior to the first ABS error and skid off we hadn't changed tyres or done anything to the car other than taken it off the trailer and done a couple of sessions. We did spin the car 360 degrees though on track in our first session so could that cause a glitch in the ABS maybe?
     
  8. stevecomp

    stevecomp Formula Junior

    Mar 1, 2013
    727
    South Australia
    Full Name:
    Steve

    Maybe, they can get sensitive if something happens like a spin. One other thing to note don’t ever go down the box to fast it will go into limp mode and a re-boot of the ecu will be needed that’s pull over and turn off the isolator and turn on again, the race is over by then.

    360c have a few idiosyncrasies that can trip you up but once you know and understand them they are very reliable and forgiving cars to drive great fun.
     
  9. PFez81

    PFez81 Rookie

    Monday
    6
    Thanks, what do you mean when you say "don't go down the box too fast"?
     
  10. stevecomp

    stevecomp Formula Junior

    Mar 1, 2013
    727
    South Australia
    Full Name:
    Steve
    Don’t grab a handful going hard under brakes if you change down to fast the TCU spits and goes in limp mode
     
  11. PFez81

    PFez81 Rookie

    Monday
    6
    Thanks Stevecomp, I will keep that info in mind about the gear change. Looks like I will have to get the car into the mechanic to take a closer look at this ABS issue.
     
  12. stevecomp

    stevecomp Formula Junior

    Mar 1, 2013
    727
    South Australia
    Full Name:
    Steve
    Can you post some pictures of the new livery mate.
     
  13. fatbillybob

    fatbillybob F1 World Champ
    Owner Consultant

    Aug 10, 2002
    16,358
    socal
    I did that once locked all 4 blasted off the track. Same thing happened to a fellow vette racer in one of the support races for LBGP about 10 years back hit the wall. Do some research on ice mode and ABS systems. Everyone suffers vettes anything. Some cars suffer more than others like early caymans. Uneven pavement and lightswitching the brakes mess up the ABS brain and we see locking and spinning off tracks. You may have broke differently this one time in the wrong spot on track and caused it to lock and go off track. A small change in brake pedal application cures the problem 100%.
     

Share This Page