Upgrading from Mk1 to Mk3 RF receiver...

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Datatek said:
Three ways to design anything, the right way, the wrong way and the German way, HUF the maker of the FOB and RF receiver are German.:rolleyes:
Anything close to 433Mhz will be picked up by the receiver, wireless door bells, are a common one but even things that are not so close are picked up like WiFi:rolleyes:
Click to expand...

My little Kia has fobs on 433Mhz ... :cool:
 
Datatek said:
Three ways to design anything, the right way, the wrong way and the German way, HUF the maker of the FOB and RF receiver are German.:rolleyes:
Anything close to 433Mhz will be picked up by the receiver, wireless door bells, are a common one but even things that are not so close are picked up like WiFi:rolleyes:
Click to expand...
Having just rebuilt a BMW R75 (1976) motorcycle for my son, I understand what you are saying. Back in the day I had a series of classic 911 Porsches - so many design faults on those - the triumph of development over design. I was always amused when Porsche started selling "Porsche Design" merchandise like watches, kettles etc - probably the 10th iteration would be OK. Even Microsoft is only 3 iterations.
But, like the BMW and the Porsche, most problems that I am resolving on my "new" P38 are caused by previous DIY "mechanics" not doing things quite right, eg wrong or missing fixings, poor servicing, bad adjustments etc.
 
P38 Monkey said:
Having just rebuilt a BMW R75 (1976) motorcycle for my son, I understand what you are saying. Back in the day I had a series of classic 911 Porsches - so many design faults on those - the triumph of development over design. I was always amused when Porsche started selling "Porsche Design" merchandise like watches, kettles etc - probably the 10th iteration would be OK. Even Microsoft is only 3 iterations.
But, like the BMW and the Porsche, most problems that I am resolving on my "new" P38 are caused by previous DIY "mechanics" not doing things quite right, eg wrong or missing fixings, poor servicing, bad adjustments etc.
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Merc have to recall 800,000 cars and SUV's due to the risk of them catching fire:rolleyes:
 
I did a scope test on the receiver output a while back. At home there were bursts of data from somewhere nearby occurring every 30s -1m. Never figured out what it was though. The "antenna disconnect" worked for few years, but limited fob range.

Then when Marty's filter became available fitted one, and it's been fine since. The only problem is the lazy-locking to close windows is slightly random with the filter fitted, but I can live with that !!
 
pwood999 said:
I did a scope test on the receiver output a while back. At home there were bursts of data from somewhere nearby occurring every 30s -1m. Never figured out what it was though. The "antenna disconnect" worked for few years, but limited fob range.

Then when Marty's filter became available fitted one, and it's been fine since. The only problem is the lazy-locking to close windows is slightly random with the filter fitted, but I can live with that !!
Click to expand...

Wireless weather station is what was stuffing mine.
 
P38 Monkey said:
Solved by Marshall8hp: the fobs and receiver are USA standard 315 MHz on my Japanese import P38.
The truth is usually out there somewhere and as ever it is located in this group - magic!
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I can speak from a little experience on the issue. You can never assume what you have is what was generally sold into a specific market. I have two Australian delivered cars, both of which are 315Mhz, whereas everyone will “tell” you that Australia is 433Mhz.
 
Grrrrrr said:
Wireless weather station is what was stuffing mine.
Click to expand...
Interesting - there is a lot more RF about these days and cheap transmitters emit lots of harmonics...
Still trying to find out if Marty's filters will work on my 315 MHz fob system, the big unknown being whether the baseband data sent to the BeCM by the RF receiver is the same for USA / Japan cars as it is for EU ones.
Probably only one way to find out....try one, then update this group on the result.
 
P38 Monkey said:
Interesting - there is a lot more RF about these days and cheap transmitters emit lots of harmonics...
Still trying to find out if Marty's filters will work on my 315 MHz fob system, the big unknown being whether the baseband data sent to the BeCM by the RF receiver is the same for USA / Japan cars as it is for EU ones.
Probably only one way to find out....try one, then update this group on the result.
Click to expand...
The data sent to the BECM has nothing to do with the carrier frequency between the FOB and the receiver, it is a straightforward digital binary square wave. I can fire up my bench test system and give you the pulse widths if you wish.
 
Datatek said:
The data sent to the BECM has nothing to do with the carrier frequency between the FOB and the receiver, it is a straightforward digital binary square wave. I can fire up my bench test system and give you the pulse widths if you wish.
Click to expand...
Sure, I understand that the filter is post-RF-stage as I say above.. My worry is that the baseband data (locking codes etc) is different in the EU system to that in the North American / Japanese variants of the BeCM. I have asked MartyUK and also P38 Spares who sell the filters, but I think the optimal approach is probably to "suck it and see" unless you know otherwise. I'll keep this group updated of course.
 
P38 Monkey said:
Sure, I understand that the filter is post-RF-stage as I say above.. My worry is that the baseband data (locking codes etc) is different in the EU system to that in the North American / Japanese variants of the BeCM. I have asked MartyUK and also P38 Spares who sell the filters, but I think the optimal approach is probably to "suck it and see" unless you know otherwise. I'll keep this group updated of course.
Click to expand...
You could be right but I doubt it. There is no logical reason to make the data format different that I can see as the same functions are available.
You could look up the part number of a NAS BECM and a European BECM in microcat and see if they are different. The whole idea of the BECM was that it is a standard unit that could be easily configured to different national requirements.
 
P38 Monkey said:
Sure, I understand that the filter is post-RF-stage as I say above.. My worry is that the baseband data (locking codes etc) is different in the EU system to that in the North American / Japanese variants of the BeCM. I have asked MartyUK and also P38 Spares who sell the filters, but I think the optimal approach is probably to "suck it and see" unless you know otherwise. I'll keep this group updated of course.
Click to expand...
Not understanding double Swahili (electrickery) I fitted a second jog switch remote as per Brian's link, it's given me years of service.;):D
 
Essentially the data stream from the receiver consists of a P38 Header section, followed by the specific keycode data stream for that fob. The BECM is looking for valid header & then checks if the keycode stuff matches. BECM always wakes up when it receives a data stream, hence the issue.

Early receivers allowed any data through regardless. The later receivers filter out anything that does not have a P38 Header, hence resolving the wake up issue. Marty's filter does exactly the same at fraction of the price.

I think you might find some US folks on RR.net have also bought them.
 
P38 Monkey said:
most problems that I am resolving on my "new" P38 are caused by previous DIY "mechanics" not doing things quite right, eg wrong or missing fixings, poor servicing, bad adjustments etc.
Click to expand...
This is what usually happens. Restoring back to how it was is normally the solution too. You’ll never be able to work out why they did it in the 1st place. See some strange mods & additions.
 
It was always orange :rolleyes::D you saw how I drilled the height sensors out, be one hell of a job put anything back on
The tyres will have to go before long. They’re nearly down to limit. Not sure about the springs either think sitting on the banking for a year has made them a little lopsided :oops: then I could do with new front shocks which means all the cleaning up in there while they’re off. Realistically can’t see I will get that much time off work. Definitely a summer job
 
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