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Thread: Where to next? Intermittent Cruise Control

  1. #41
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    Quote Originally Posted by Eric SDV6SE View Post
    Gap IId or Rovacom VCIQ are both good and around 650-450 respectively. Before i bought my Rovacom VCIQ i used the "C reader V" off ebay that was about 60 bucks that could read all 21 ecus, but only clear the basic level codes. Good enough to get out of trouble and or be able to diagnose issues.

    Also, anyone with say a Foxwell code reader should be able to help out. A mate looks after BMW's and is able read most other car makes too
    Thanks Eric. I've ordered a basic one to check and clear what I can.

  2. #42
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    So the cheap one I got showed no faults sadly...

  3. #43
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    Time to take it to an Indy.

    It is possible that many issues could result in CC being disabled. In the case of my Forester a failing oxy sensor disabled the cruise control. Why? No ****** idea....a failing oxy sensor is hardly a safety issue but the code muppets at Subaru made it so anyhow. I have no doubt the masterminds at LR build similar '''intelligence''' into their system too.

  4. #44
    BradC is online now Super Moderator
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    Quote Originally Posted by Markus1 View Post
    I have no doubt the masterminds at LR build similar '''intelligence''' into their system too.
    In a car where a blown brake light bulb can leave you limping home at 40kph on the bump stops? Never.

  5. #45
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    Quote Originally Posted by Parso View Post
    So I have now replaced the brake light switch, the cruise control pack, the wiring loom, and the clock spring and still no cruise control.

    Really not sure where to go now...
    Have you changed the CC buttons? They were faulty on my original 2005 D3 which caused intermittent CC. Buttons were changed by dealer, no more problems. Sorry if I missed the post that said you have done that.
    2022 Defender D250 S being set up for touring.
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  6. #46
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    Cruise Control started working again yesterday out of the blue and has continued working today.
    Only change I made recently was to move my chair back a little. Not sure if this is related or just a coincidence.
    I'll take it though- hopefully it stays going.
    Off to the Indy for timing belt in a few weeks.
    Thanks for all the input and help head scratching guys.

  7. #47
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    Ah. The old 'move the seat back a bit' trick. That's the second time I've fallen for that this month.

  8. #48
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    Quote Originally Posted by Markus1 View Post
    Ah. The old 'move the seat back a bit' trick. That's the second time I've fallen for that this month.
    Loaded up the family for a jaunt to the next town over aaaand it's stopped working again.

  9. #49
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    My olde worlde '95 D1 Vaccy type CC used to give me the irrits every now & then but I usually found a leaky hose until the last episode when not even a new CC Module would sort it. This was probably the simplest CC system not like today's gear.

    It was one of the reasons I replaced the vehicle as well as other foreseeable problems that would set me back a Motsa so got shot.

    The CC drove me bloody bonkers trying to chase the cause but I got my own back & traded it in.

  10. #50
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    Quote Originally Posted by Mickyg View Post
    Not even my car and this is annoying me lol
    So I found the fault in the end, or what I have decided must be the fault without a code reader, and have enjoyed glorious cruise control for the last 2 weeks straight.

    Unless someone moves to town with a code reader or Christmas is especially good you’ll have to make do with my best conspiracy theory yet.

    Ramblings:
    The right hand speakers of my car often cut out at low volumes and I need to increase it to have them suddenly come back in. So what? It’s not the most annoying amplifier fault, and my understanding is that it is caused by a minor short that increasing the volume will put more power through and bypass.

    I thought it was odd though that the days when my cruise control worked I was nearly always alone in the car, and could guess if it was going to work by some strange feeling (namely better sound quality.)

    Theory is: the amplifier has been throwing a fault at the initial system check at low volume that Land Rover in its infinite wisdom has decided means Cruise Control should be disabled.

    Evidence:
    Have the volume at 20 on startup- both channels work and so does cruise consistently for 2 weeks. In past never more than 2-3 days.
    Cruise has always worked if working at startup - never dropping out - making me think failing system check.
    First thing wife does when getting in car is turn down or off music - rarely cruise control with family.
    Toddler playing with my seat sometimes got it going - amplifier under said seat.

    I just finished barrier year Medical exams so I might have a tinker over the next few weeks.
    Thanks for all the help troubleshooting guys. I’ll be putting my spares up on the forum for the next guy to have a run. Glad to put this to bed.

    TL;DR HK amp throwing fault at startup knocking out CC unless volume is up.

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