P38guy
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Was reading a write up from a recent Land Rover press release ( another forum) that a new generation of receiver is being produced and can only be purchased from main dealer with vin why ?
RF receiver
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Datatek
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For the P38 at this late stage? Sounds unlikely. If they do it it will be very expensive.
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Are you perhaps talking about this....
The updated RF receiver YWY500170 to solve battery drain
There's a post in there somewhere where there is a suggestion of a MK4 version coming out. Turned out to be a red herring, fulled by the VIN requirement when ordering the new part. Speculation was that the MK4 would be somehow coded to your BECM and would only wake up the BECM if it was the right BECM for that RF Receiver.
It appears that due to a mis-calculation by LR concerning the numbers of P38s in use world wide, they have run out of stock of the MKIII. This has been confirmed by someone of RR.net that seems to have a contact at HQ.
They are getting more made up, but it'll take until November 2013 for them to come in to stock ,and that is why LR have put "special order" status on the part insisting on surrendering your VIN etc and putting the price up to £300...
The updated RF receiver YWY500170 to solve battery drain
There's a post in there somewhere where there is a suggestion of a MK4 version coming out. Turned out to be a red herring, fulled by the VIN requirement when ordering the new part. Speculation was that the MK4 would be somehow coded to your BECM and would only wake up the BECM if it was the right BECM for that RF Receiver.
It appears that due to a mis-calculation by LR concerning the numbers of P38s in use world wide, they have run out of stock of the MKIII. This has been confirmed by someone of RR.net that seems to have a contact at HQ.
They are getting more made up, but it'll take until November 2013 for them to come in to stock ,and that is why LR have put "special order" status on the part insisting on surrendering your VIN etc and putting the price up to £300...
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mozz smith
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nothing new there then from landrover !!!!!!! im wondering if its only the p38s that have them ?????? maybe a daft thought but I can put up with the **** take !!!! but really ive always been taught that if you don't know the answer "THEN ASK" so here goes -what do mercs -audi- jags and bmw use ?????????? I do know that certain BMWs use the same amp as the p38 in car audio system i.e. hardon !!!! so it could be feasible that the high end car market have similar recievers and run on 433 MHz regards mozz
mozz smith
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worth a visit to scrapyards and pick one or two up and compare them they shouldn't be too difficult to replicate the internals should it ????????????? maybe sounds daft but I don't care !!!!!! I could start having them made and sell them cheaply to all my customers ??????????? mozz
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My old Jag one used the same frequency. Worked from miles away too.
I can't believe they would have bothered to develop two of the same thing independently of each other...would they?
I can't believe they would have bothered to develop two of the same thing independently of each other...would they?
mozz smith
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mmmmmmmmm , the plot thickens !!!!!!! theres three to let me have a go at rover 75 and now bmw wich I suspected all along any ideas wich model ??? of bmw ????? and the jag ???????? wich model anyone ????? cheers ,,mozz
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My Jag was the X300, from 1995.
I've just been reading the Jag version of RAVE. Works in exactly the same way as the RR Gems version. Code swapped with engine ECU, chip in the key activated by an exciter coil around the ignition barrel etc....
Engine is immobilised by cranking, and fuelling.
The part even looks similar.....I wonder!
I've just been reading the Jag version of RAVE. Works in exactly the same way as the RR Gems version. Code swapped with engine ECU, chip in the key activated by an exciter coil around the ignition barrel etc....
Engine is immobilised by cranking, and fuelling.
The part even looks similar.....I wonder!
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mutsnutz
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i think datatek was going to try make some if he ever got the time 
Datatek
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The problem is, that as far as I can ascertain, one chip in the RF receiver contains a recognition code so the BECM is not woken up by every FOB on the planet. I know what the chip is but the manufacturer will not release data sheets presumably for security reasons.
Even if I find out what the code is, programming the chip would require special equipment.
It may be possible to do a bodge with a commerciall 433Mhz FOB and receiver and wire it into the coded chip in the old receiver.
Probably the easiest solution would be to bypass the BECM switching off the alarm functions and fit an aftermarket alarm that has door lock operation built in
sandyt
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As a total lay man on this electrickery my wonder is this the latest version which I bought a few years ago is a mod of the previous version /versions is there any way of modifying the older version to work as the new? Probably not but worth an ask .
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Do you think that the BECM would operate all the other car functions even if it hadn't received the mobilisation code from the key?
You could switch the alarm off with diagnostics and the passive immobilisation too. That would just leave the key transponder wouldn't it?
I have a BECM service document that says the BECM to engine ECU security mobilisation code is a single burst of 5v pulses on pin 5 of the green connector.
Hypothetically, if you could read and copy the burst and then set up some sort of device to just send the same burst down that wire whenever the key was inserted, would it allow the engine to run do you think?
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NikTheGeek
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Datatek
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If you turn off all the alarm functions in the BECM, you can operate the car from the key without a FOB, that being the case, it would not be too difficult to splice in an after market alarm/FOB and get it to operate the door locks.
A burst of 5 volt pulses containing a digital code but there should be no need as that function still works with the alarm off. If you had to do it, a Rasberry Pi could easily be programmed to do the job once you had the code which is I believe different for every car.
P38guy
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You are brave
fartytrike
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Land rover have clearly acknowledged that there is a problem with the rf receiver, as they have released a replacement receiver. The cheek is they charge £300 for the privilege!come on must be some computer expert out their that can modify the old ones.??
