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Thread: The P38 and home gadgets...

  1. #1
    Join Date
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    The P38 and home gadgets...

    I found the battery on the P38 almost discharged a week or so ago.
    Being new to the vehicle and after reading a few posts on here about mysterious battery discharging I have been checking the battery regularly. Happy to see that the normal discharge has been about 20mA. Happy with that. The EAS relay has an isolating switch.
    So... suddenly the discharge is 550mA
    Drops to 20mA after about 3 minutes and then back to 550mA immediately.
    Looks like BCU waking up - what on earth can be doing that? Car locked, same. Car unlocked - same. Key fob batteries out- no difference.
    ???
    My nearest neighbor is 5km away so no stray radio signals around, or so I thought.
    Then after a few days of this I remembered it seemed to start about the time I installed one of those meter box power monitors, unit attached to the meter sends a signal to the indoor display every 30 seconds. AND on 433mHz.
    Out with its batteries - problem gone.
    Looks like the monitor has to go.
    Geez I really like this P38 but I never had these problems with series Landrovers

    Terry
    56 86" 2.0 P UK built, driven here overland.
    63 88" 2.25 P Canvas top. found in a hidden gully.
    80 109" 2.6 P ex Army GS, saved from the scrappie.
    95 300tdi 130 Single cab tray.
    2010 Guzzi 750

  2. #2
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    Bloody modern tech!!
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  3. #3
    p38arover's Avatar
    p38arover is offline Major Part of the Heart and Soul of AULRO Gold Subscriber
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    When I used to drive mine to work (signal box on NSW railways) at some sites. e.g., St Marys (NSW), the key fob would not lock/unlock the car. I guess the local RF from the on-site transmitters would affect the Rangie.
    Ron B.
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  4. #4
    TheTree is online now ChatterBox Silver Subscriber
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    Hi

    Martin Cox has a solution (apart from replacing the receiver)

    P38 RF Receiver Filter

    Steve
    MY96 4.6 HSE P38. Niagara Grey; "The Phoenix"
    MY99 4.6 HSE P38. LPG, Blenheim Sliver; "Voldemort" burnt to a cinder
    MY79 RR Classic, Gone, MY57 Series 1 SWB, Long gone
    P38 write ups and info on my website http://p38.hts.com.au/

  5. #5
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    well dang, I always though the battery drained on these quickly but this explains a thing or two. I usually leave the key in the ignition though (yes I can do that down here) so I wonder if it still activates then...

    Cheers
    -P

  6. #6
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    Quote Originally Posted by prelude View Post
    well dang, I always though the battery drained on these quickly but this explains a thing or two. I usually leave the key in the ignition though (yes I can do that down here) so I wonder if it still activates then...

    Cheers
    -P
    Seems any RF at around 433mHz will wake it up to check if its being requested to do something. Stays awake for about 3 minutes then goes back to sleep. If the RF is still there it wakes up again and......then flat battery
    Terry
    56 86" 2.0 P UK built, driven here overland.
    63 88" 2.25 P Canvas top. found in a hidden gully.
    80 109" 2.6 P ex Army GS, saved from the scrappie.
    95 300tdi 130 Single cab tray.
    2010 Guzzi 750

  7. #7
    Join Date
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    Black Mountain, Eastern Vic.
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    Quote Originally Posted by TheTree View Post
    Hi

    Martin Cox has a solution (apart from replacing the receiver)

    P38 RF Receiver Filter

    Steve
    That filter probably wouldn't work because the RF signal from my gadget is already in the frequency range that the BCU is expecting from the key fob.
    Terry
    56 86" 2.0 P UK built, driven here overland.
    63 88" 2.25 P Canvas top. found in a hidden gully.
    80 109" 2.6 P ex Army GS, saved from the scrappie.
    95 300tdi 130 Single cab tray.
    2010 Guzzi 750

  8. #8
    TheTree is online now ChatterBox Silver Subscriber
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    Quote Originally Posted by rover-56 View Post
    That filter probably wouldn't work because the RF signal from my gadget is already in the frequency range that the BCU is expecting from the key fob.
    Terry
    Martin is very approachable, so if you are interested I would send him a message and ask him if it would help your issue

    Steve
    MY96 4.6 HSE P38. Niagara Grey; "The Phoenix"
    MY99 4.6 HSE P38. LPG, Blenheim Sliver; "Voldemort" burnt to a cinder
    MY79 RR Classic, Gone, MY57 Series 1 SWB, Long gone
    P38 write ups and info on my website http://p38.hts.com.au/

  9. #9
    Join Date
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    Quote Originally Posted by TheTree View Post
    Martin is very approachable, so if you are interested I would send him a message and ask him if it would help your issue

    Steve
    Thanks Steve, but I have solved the problem by giving the monitor to a friend. No she doesn't have a P38
    Terry
    56 86" 2.0 P UK built, driven here overland.
    63 88" 2.25 P Canvas top. found in a hidden gully.
    80 109" 2.6 P ex Army GS, saved from the scrappie.
    95 300tdi 130 Single cab tray.
    2010 Guzzi 750

  10. #10
    TheTree is online now ChatterBox Silver Subscriber
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    Much cheaper option
    MY96 4.6 HSE P38. Niagara Grey; "The Phoenix"
    MY99 4.6 HSE P38. LPG, Blenheim Sliver; "Voldemort" burnt to a cinder
    MY79 RR Classic, Gone, MY57 Series 1 SWB, Long gone
    P38 write ups and info on my website http://p38.hts.com.au/

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