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Thread: Flashing traction control light.

  1. #1
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    Flashing traction control light.

    Now I'm puzzled...

    Both rear wheel speed sensors are withing resistance range when tested. Rings are in good condition, air gap seems fine, might be a little large on one side. Traction control works, as does the ESP and the ABS.

    Yet I still have this flashing traction control light on the dashboard.

    No fault codes...

    Nothing showing except this light. So where to next?
    2001 3.0 SE Auto, Satnav, winter pack. Dark Blue, 120,000 and counting, Grace and Pace..
    2004 3.0 Soveriegn Estate. Winter pack. New project. Green.
    2005 Estate X type 2.0 XS in Black. Sold.
    2000 V8 3.2 XJ8. My "Roundtuit" car.
    2005 "AllyCat", 3.0 XJ6.
    VFR800A too for when the suns out.
    Handling tips: If you see the tree before you hit it, that's Understeer: If you only feel the tree as you hit it, that's Oversteer. Close your eyes, it won't hurt honest.

    Living the dream.

  2. #2
    Senior Member Jim_S-V6_2004's Avatar
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    Jaguar indie i guess bud.

    They are rare so Merc or BMW indie could also be competent but might not have the diagnostic gear.

    You could try making a Lazlo ABS Sensor tester, see the thread in our Stickies. That will test the ABS sensors dynamically.

    Or if you can get and use an oscilloscope that's way better.

    Or to rule them out the rear ones are only £24 each.

    .

  3. #3
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    They're not resistance devices so all you could hope for testing that way would be an obviously bad one.

    Have you read the codes from the actual module? Have you checked any others on the same network? If not you're in the dark unless you do.

  4. #4
    Senior Member the fussy one's Avatar
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    Cheapest option at the moment surely is replace both sensors? They are cheap enough and then at least you know what it isn`t.

  5. #5
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    Yes. I think changing them is the best way.

    No fault codes showing on IDS legacy software. I'll see if I can find a part number and change them out. I thought maybe there might be a reset that I'm missing, but reasonably it has to be a strange one if traction control is plainly working, using the button to turn it off gives the dashboard message "DSC Off" and "DSC On" when I press the button.

    I'm wondering where else the "flashing warning lamp" signal might be coming from. In fact I'm thinking could it be related to the cruise not working? Again, no fault codes...

    I bought this car knowing it had this, I have an enquiring mind, and want to work through and find the cause.
    2001 3.0 SE Auto, Satnav, winter pack. Dark Blue, 120,000 and counting, Grace and Pace..
    2004 3.0 Soveriegn Estate. Winter pack. New project. Green.
    2005 Estate X type 2.0 XS in Black. Sold.
    2000 V8 3.2 XJ8. My "Roundtuit" car.
    2005 "AllyCat", 3.0 XJ6.
    VFR800A too for when the suns out.
    Handling tips: If you see the tree before you hit it, that's Understeer: If you only feel the tree as you hit it, that's Oversteer. Close your eyes, it won't hurt honest.

    Living the dream.

  6. #6
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    Quote Originally Posted by Jim_S-V6_2004 View Post
    Jaguar indie i guess bud.

    They are rare so Merc or BMW indie could also be competent but might not have the diagnostic gear.

    You could try making a Lazlo ABS Sensor tester, see the thread in our Stickies. That will test the ABS sensors dynamically.

    Or if you can get and use an oscilloscope that's way better.

    Or to rule them out the rear ones are only £24 each.

    .
    £24 each? Where from? They are handed and have quite long cables, cheapest I've seen are more like £40 each. Still cheap enough I guess. 1999 model, 4.0 V8.

    I guess my starting thread was more a rhetorical question?
    2001 3.0 SE Auto, Satnav, winter pack. Dark Blue, 120,000 and counting, Grace and Pace..
    2004 3.0 Soveriegn Estate. Winter pack. New project. Green.
    2005 Estate X type 2.0 XS in Black. Sold.
    2000 V8 3.2 XJ8. My "Roundtuit" car.
    2005 "AllyCat", 3.0 XJ6.
    VFR800A too for when the suns out.
    Handling tips: If you see the tree before you hit it, that's Understeer: If you only feel the tree as you hit it, that's Oversteer. Close your eyes, it won't hurt honest.

    Living the dream.

  7. #7
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    Seems to be the first ever report of this so maybe a bad module or ... well, consult a really knowledgeable specialist. (Or maybe consult jag themselves, not a dealer.)

    I can't see it being both sensors unless it's something common to them, such as wiring, but you'd expect code(s).

    IDS usually lets you drill down to see in detail but I've a newer car with very different modules etc.

  8. #8
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    I think the "Legacy" software dosn't go quite as deep unfortunately, and if even that isn't detecting any fault, my thinking is that Jaguar being Jaguar that warning light could be indicating another fault with another system.

    When I disconnected the sensors and spun the wheels I did get the ABS light staying on, which is why I'm a little confused, if the ABS system is working as it should, what else might trigger this light flashing.

    What I really need is a good day working around the car's systems. In an aircon equipped garage, with a ramp, good lighting, non stop tea, hot and cold running chambermaids and a nice deck chair with table full of manuals.

    But....
    2001 3.0 SE Auto, Satnav, winter pack. Dark Blue, 120,000 and counting, Grace and Pace..
    2004 3.0 Soveriegn Estate. Winter pack. New project. Green.
    2005 Estate X type 2.0 XS in Black. Sold.
    2000 V8 3.2 XJ8. My "Roundtuit" car.
    2005 "AllyCat", 3.0 XJ6.
    VFR800A too for when the suns out.
    Handling tips: If you see the tree before you hit it, that's Understeer: If you only feel the tree as you hit it, that's Oversteer. Close your eyes, it won't hurt honest.

    Living the dream.

  9. #9
    Senior Member the fussy one's Avatar
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    When one of my sensors went awol traction light was on with message and cruise did not work either. New sensor all restored.

  10. #10
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    Quote Originally Posted by the fussy one View Post
    When one of my sensors went awol traction light was on with message and cruise did not work either. New sensor all restored.
    Sounds too easy.

    I was hoping it would be a "chase the SAS sensor power supplies" job like my X type with duff ESP was...

    Ok, I'll just buy two and swop them both out. At least I know where the cables go... No dashboard message with mine.
    2001 3.0 SE Auto, Satnav, winter pack. Dark Blue, 120,000 and counting, Grace and Pace..
    2004 3.0 Soveriegn Estate. Winter pack. New project. Green.
    2005 Estate X type 2.0 XS in Black. Sold.
    2000 V8 3.2 XJ8. My "Roundtuit" car.
    2005 "AllyCat", 3.0 XJ6.
    VFR800A too for when the suns out.
    Handling tips: If you see the tree before you hit it, that's Understeer: If you only feel the tree as you hit it, that's Oversteer. Close your eyes, it won't hurt honest.

    Living the dream.

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