Jump to content

Will ABS/DSC lights turn themselves out when the fault's fixed? - EDIT: Yes they do

Lazlo Woodbine

Recommended Posts

As per the title. My ABS and DSC lights are on constantly, they come on with the ignition on check and never go out.  "DSC system fault" shows on the screen 9/10 times. I have only occasionally not had it appear and when it doesn't I can turn DSC on and off as normal but ABS light stays on.

I bought the car two weeks ago knowing it had a fault, the previous owner only used it occasionally and a few weeks ago he went to drive off only to find the brakes stuck on. He unstuck them by just driving away and that's when the lights came on. The o/s handbrake is useless so my hunch is that it was the sticky one.

Cruise control works but I don't know which wheel speed sensor it uses.

I had a local garage use their Solus scanner on the car last week but my battery voltage was too low for the scanner to communicate. I have since replaced the battery as a matter of course since two days on a smart charger wouldn't revive it.

I now have a collection of used ABS sensors, front uprights c/w hubs and the ability to test and fit them so was hoping to save paying for use of the scanner. I also have four callipers and a spare ABS pump c/w module just in case.

So yes is there anyway to reset the DTC once I fix the problem? As it is I can test individual sensors, the reluctor rings and probably the loom back to the ABS/DSC module but if it's none of them and the codes won't reset themselves I'll be stuck with repeated scannings and paying for the pleasure.

PS. I did buy a Maxiscan Vgate VS890 which was recommended (on this forum no less) and advertised as doing ABS codes, it doesn't..


Link to comment
Share on other sites

Hi Ralph,

if it were me, I would look at the discs, brake fluid, pads etc and replace accordingly, do you know when any of the aforementioned were replaced or serviced  ? Sensors are well known for being sensitively difficult with the slightest anomaly, sorting these should allow a reset,  I've just had all my disks, pads and fluid changed and all is well. It could well be a mechanical issue that is setting the D.SC.  / abs light OFF.



Link to comment
Share on other sites

Thank you for the input but it's the matter of the fault codes clearing themselves without the use of a scanner that I need to resolve. I've got a handle on the mechanical side of things but OBD is new to me.

Today I made an LED test light rig to test individual wheel speed sensors and found two (both o/s) which I have replaced with good used ones. Now that I know the colours of the wires leading to the ABS/TSC module I shall use the same rig to test the loom between the plug into the module and the sensors. Once I've got this issue sorted I'll try and find time to do a write up on making the test rig and how to use it, it's no OBD scanner but it cost under a tenner and actually allows you to do things a scanner won't.

The burning question still is whether I need to plug the car in to clear the DTCs which the ABS light tells me must(?) be there. Due to a stupid error the car is still on stands tonight so I haven't had a chance to find out yet. Once it's running I suppose I can use it till Saturday and if they're still there I'll have it scanned.

That error, yes.. The o/s/r caliper seemed to be working on the footbrake but not the handbrake, not at all. So I had a look at the two calipers in that pile of used parts I mentioned above. One was nice and shiny with a smooth handbrake cam, the other was seized up with burst seals and a rusty piston. Guess which one I needed.. yes the knackered one. No problem! The only difference left to right seems to be the handbrake arm and cable bracket. I'll just swap them over and Bob's your mothers brother. This was great until I fitted the newly fettled shiny caliper and realised that the bleed nipple was at the bottom, below the hydraulic line, meaning it would have to come back off for this and every subsequent bleeding. Swearing commenced followed by packing up and putting the kettle on.

Link to comment
Share on other sites

Well I rebuilt the original o/s/r caliper and fitted that today. Simple stuff really, just wind the threaded piston out, remove a circlip and the whole handbrake cam assembly comes out in one piece. Muck had got past the external seal of the shaft that the handbrake arm fits to made it all rusty. The piston and its seal were in good condition so I cleaned that up the handbrake gubbins and reassembled it. I now have a working handbrake, which is nice. I may bebuild the knackered spare caliper with new seals just for fun..

So having got the car back on its wheels and knowing I had four working wheel speed sensors I disconnected the battery and went in for a cuppa. Half an hour later I hooked it back up, ABS light on, but no DSC warning and I could switch it on and off, encouraging. I figured it was wiser to have it scanned now and reset the light rather than risk the light staying on becauseit wouldn't reset itself or worse there was another fault (MOT on Monday). So I set off to collect the ball joint I'd ordered and go to the garage. A mile or so down the road the ABS light went off! Despite repeated re-starts it won't come on, fantastic! Not so fantastic is the tickover now stays at whatever revs you were at when dipping the clutch. Sometimes it will drop back, sometimes not. I've told myself it's the ECU trimming up after the lack of power..

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Join The Club

    Join the Jaguar Owners Club and be part of the Community. It's FREE!


  • Topics

  • Our picks

    • Post in Event Ludlow Racecourse Shropshire 19th May 2024
      Not long now to Ludlow. It sold out before the event last year it is very popular.

      To book a ticket in advance go to EVENTBRITE or Message me. 


    • Simply Jaguar show at Beaulieu - Sunday 23rd June 2024
      Jaguar Owners Club have a stand at this year's Simply Jaguar event at the National Motor Museum at Beaulieu, Hampshire on Sunday 23rd June 2024

      Tickets are available online here: https://www.beaulieu.co.uk/events/simply-jaguar/
        • Like
      • 1 reply
      Jaguar is commemorating the end of its internal combustion sports car lineage in 2024 with an exclusive limited-edition F-TYPE inspired by two iconic 1960s racing E-types

      Just 150 examples of the F-TYPE ZP Edition will be the last internal combustion-engined sports cars designed by Jaguar. These 575PS supercharged petrol V8 F-TYPEs feature specially curated interior and exterior details by the personalisation experts at SV Bespoke.
        • Like

      Please find attached your club label – please can this be distributed amongst your club members prior to the event. Please ensure that they print this label and display it in their windscreen upon entry to the event, this ensures that all members wishing to park within your club area are directed to the correct parking location by our stewards. Please do not modify or add logos to the club label.

      We do ask that all individuals have purchased their tickets on an individual basis in advance via our website, to speed up the entry process on the day. This can be done on our website here until 2pm on the day when admission closes: https://www.beaulieu.co.uk/events/simply-jaguar.

      Note that we do have two entrances available, one is exhibitors gate at the bottom of the hill as you come in to Beaulieu, with the other being the normal Simply event entrance within the attraction. Either entrance is fine to use and both are open from 9.00am, with the exhibitors entrance closing around 11am.

      Jaguar Owners Club (1).pdf
    • Simply Jaguar - Beaulieu Motor Museum - 25th June 2023
      Jaguar Owners Club have a stand at this years Simply Jaguar event at the National Motor Museum at Beaulieu, Hampshire on Sunday 26th June 2023

      Tickets are available online here: https://www.beaulieu.co.uk/events/simply-jaguar/

      Participant prices are only valid if arriving in a Jaguar and taking part in the rally. They are not valid for those arriving on foot.

      Participants can make the most of our EARLY BIRD discount by booking before 28th February 2023.

      Children under 5 require a ticket, this can be booked online free of charge.

      Participant and visitor tickets will include entrance to the rest of the Beaulieu attraction, including the National Motor Museum, Palace House, Little Beaulieu, World of Top Gear, Beaulieu Abbey and its grounds and gardens.

      The best time for viewing the Simply rally is between 10am and 2pm.





      Participants – Early Bird*



      Participants – Standard & On The Day




      Normal admission applies.

      Normal admission applies

      *Early bird tickets are available until 28th February 2023

      Entry with your Jaguar is from 9am – 2pm. Please make sure you have your ticket printed or available on your phone, ready to be scanned on arrival.

      Please do not arrive early for our Simply rallies as no facilities will be open prior to 9:30am.

      Cars cannot leave and re-enter the grounds for the Simply rallies.



      We do ask for a final update on numbers 2 weeks prior to the event following which we will send out club labels to you via email for you to then distribute out to club members. Club members then need to print and display these in their windscreen on arrival. This helps us then park you all in your club area together.

      1. Trevor (admin)
      2.  Paj
      • 5 replies

  • Create New...