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Thread: Multiple warning lights - on D4's Fraser Island debut

  1. #11
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    Quote Originally Posted by scarry View Post
    Or a PAj,that cuts out and won't go anywhere until it cools down,not fun down near the water when the tide is coming up.

    Overheating the auto on a D4 brings up other fault codes and warnings on the dash read out,and reduces the use of some gears.

    Turning the engine on and off resets it once its cooled down.

    The best way to let it cool is put the vehicle in neutral and let it idle,don't turn it off.

    It doesn't cause suspension faults.
    I wouldn't say it "doesn't" throw suspensions faults. It probably isn't meant to, but that's not to say it won't. Brake switches throw gearbox and suspension faults... I had a fuel rail pressure sensor cause gearbox faults amongs others and for months no fuel related codes at all.

    With the way the computers are chained together in the CAN setup, you can get some pretty funky codes displayed. Makes troubleshooting a fun little game...
    -------------------------
    Chris Phillips


    Offroader: 1996 Discovery 300TDI (The Green Donkey)
    Missus: 2010 Discovery 4 TDV6 (Fancy thing)
    Just 'cause: 1999 Discovery SE 3.9L V8 (Makes fun noises, sometimes...)
    Spares: 1998 Discovery 300TDI (Only vehicle actually in the garage..........)

    Run around:
    2001 Nissan Pulsar ST 1.8L (Soul crusher)

  2. #12
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    Quote Originally Posted by libertyts View Post
    I wouldn't say it "doesn't" throw suspensions faults. It probably isn't meant to, but that's not to say it won't. Brake switches throw gearbox and suspension faults... I had a fuel rail pressure sensor cause gearbox faults amongs others and for months no fuel related codes at all.

    With the way the computers are chained together in the CAN setup, you can get some pretty funky codes displayed. Makes troubleshooting a fun little game...
    Correct,just edited my post.
    I know,with a D4,anything is 'possible'

    FWIW,i have used high range at times in very soft sand,with no issues at all,particularly where a lot of speed and momentum is needed.

    But in the slower soft stuff,its low only.

    In the D2 it was not uncommon to see the auto overheat warning light come on in very hot weather,soft sand,and low range.
    Paul

    D2,D2,D2a,D4,'09 Defender 110(sons), all moved on.

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  3. #13
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    Quote Originally Posted by scarry View Post
    Correct,just edited my post.
    I know,with a D4,anything is 'possible'

    FWIW,i have used high range at times in very soft sand,with no issues at all,particularly where a lot of speed and momentum is needed.

    But in the slower soft stuff,its low only.

    In the D2 it was not uncommon to see the auto overheat warning light come on in very hot weather,soft sand,and low range.
    Haha, all good bud. Just thought I'd clarify for those that haven't yet experienced the fun of tracing weird fault codes.
    -------------------------
    Chris Phillips


    Offroader: 1996 Discovery 300TDI (The Green Donkey)
    Missus: 2010 Discovery 4 TDV6 (Fancy thing)
    Just 'cause: 1999 Discovery SE 3.9L V8 (Makes fun noises, sometimes...)
    Spares: 1998 Discovery 300TDI (Only vehicle actually in the garage..........)

    Run around:
    2001 Nissan Pulsar ST 1.8L (Soul crusher)

  4. #14
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    All those faults point to a wheel speed sensor fault but only reading the codes would correctly identify the cause.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
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  5. #15
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    Quote Originally Posted by Graeme View Post
    All those faults point to a wheel speed sensor fault but only reading the codes would correctly identify the cause.
    That's the one I was missing! I knew there was something I'd forgotten and I could think of what it was for the life of me.

    This is why we love ya' Graeme! Hahaha
    -------------------------
    Chris Phillips


    Offroader: 1996 Discovery 300TDI (The Green Donkey)
    Missus: 2010 Discovery 4 TDV6 (Fancy thing)
    Just 'cause: 1999 Discovery SE 3.9L V8 (Makes fun noises, sometimes...)
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    Run around:
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  6. #16
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    Quote Originally Posted by scarry View Post
    Probably something to do with a wheel sensor,......suspension sensor,or something similar.

    May not happen again.
    Singled-out from this post.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
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  7. #17
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    Fair enough, missed that in scarry's post too.
    -------------------------
    Chris Phillips


    Offroader: 1996 Discovery 300TDI (The Green Donkey)
    Missus: 2010 Discovery 4 TDV6 (Fancy thing)
    Just 'cause: 1999 Discovery SE 3.9L V8 (Makes fun noises, sometimes...)
    Spares: 1998 Discovery 300TDI (Only vehicle actually in the garage..........)

    Run around:
    2001 Nissan Pulsar ST 1.8L (Soul crusher)

  8. #18
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    Quote Originally Posted by Graeme View Post
    All those faults point to a wheel speed sensor fault but only reading the codes would correctly identify the cause.
    plus 1 for that. Could be damage to cable or connectors are water damaged. Needs a diagnostic tool on it. Search “three Amigos” fault. It’s a show stopper. But cheap fix.
    2014 white TDV6, compomotives with BFG KO2, E-Diff, rocksliders, Redarc DBS, Mitch Hitch, TPMS, icom UHF, GOE compressor and bash plates, hidden winch Mount, GAP ID tool.

  9. #19
    josh.huber Guest
    Brake light switch can cause that. A quick search on here you'll get the part number. A quick reset makes it go away. Occasionally I set it off normal driving with work boots on. Having the brake pedal on and driving will do it. But also liked Graham said, wheel speed etc. I would expect any sort of over heat to give a warning as it's an "event" not a "fault"

  10. #20
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    Quote Originally Posted by libertyts View Post
    I'm going to state it as well, low-range in the sand. Not just for D3/4's. Any 4wd. I know it is taught in some off-road classes and videos to use high-range in a low gear, simply put, they are just plain wrong! It doesn't take mechanical sympathy into consideration at all!

    When are you ever going to go over ~40km/h (I can't remember now what speed the bloody D4 gets up to in low/6th... Only my poor little D1. Haha) in the soft sand? If you are, you are going to break many, many things over time...

    I get it, on Fraser the main beach "highway" is like a road. That's fine. Get onto the hard stuff, stop/slow for a moment, pop it into high and go. Getting off the hard? Stop, low, go. It takes seconds to do and will ultimately save you thousands $ over the years.

    On top of all that, once you're in low, you have sooooo much torque on tap now! It's a beautiful thing.

    Sorry for the rant, but I have seen high-range mentioned in sand driving difficulty threads so many times this year it's getting to me.

    I would also lean towards overheating being your issue. Question though... Had you recently crossed through one of the creeks? Maybe the alternator got a little drowning or you have some wiring (height sensors, ABS, compressor wiring, etc.) that might be wearing and the water closed a circuit it didn't expect to be closed. It's a hard one to diagnose without knowing the exact scenario and the codes that had been thrown. Scan tools are your best friend on any modern 4wd these days.

    Thanks Chris/all.

    To answer some earlier questions - on Fraser Beaches/highways we were in normal height mode, no driving program, high-range...effectively highway mode at 75km.

    On inland tracks, where the issue happened - we never really exceeded 35-40km, so too slow to trigger the auto-height adjustment.

    That said - good feedback re: overheating. I have to say I was surprised the extent at which Sand mode held on to low gears - audibly stressing the engine. I found myself often paddle shifting up through gears to make it less taxing on engine where clearly the vehicle was handling softer sand fine, so that advice deffo aligns.

    Can I ask, for longer softer sand stretches, would you often sit in low range - but perhaps higher gears (3/4?) when doing 40kms on tracks etc?

    Noted on the creek crossings potentially shorting electrics/potential wheel speed sensor implications. Do the fault code exist retrospectively if I were to investigate over the coming weeks?

    Chris

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