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#985187 - 04/19/17 02:28 PM Re: Interchangeability of used ZFE units [Re: Boot]  
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Boot Offline
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Nice work dirtrider. I think I've seen that table somewhere too, but couldn't figure out how mine fitted into the scheme because it is a 61357680890. Maybe different countries had different part numbers. Some for km/hr default, some mph?? Beats me.

#985188 - 04/19/17 02:35 PM Re: Interchangeability of used ZFE units [Re: Boot]  
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Morning Boot

Maybe this info will help (I can't verify it's total accuracy though)

http://www.realoem.com/bmw/partxref?q=61357680890


D.R. ___
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#985258 - 04/20/17 02:06 PM Re: Interchangeability of used ZFE units [Re: Boot]  
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Yep, that's exactly the same page I linked to in my first post at the start of this topic. Great minds think alike. I'm hoping that it is correct because it broadens my options.

The nearest dealership says the same thing as you, dirtrider - that the ZFE almost never fails. My neighbour phoned them, very kindly. They reckon if I buy a replacement it'll have to be reprogrammed before it can be used, which is an annoying thought. They can look at mine, of course, and say that it will need to be reset seeing as I've disconnected it and mucked about. I don't know what that means, whether they're just talking about clearing the error codes. Maybe they'd be able to revive it by flashing it with a software update.

I'll have to think about which way to go as a first step.

#985259 - 04/20/17 02:22 PM Re: Interchangeability of used ZFE units [Re: Boot]  
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Originally Posted By: Boot
Yep, that's exactly the same page I linked to in my first post at the start of this topic. Great minds think alike. I'm hoping that it is correct because it broadens my options.

The nearest dealership says the same thing as you, dirtrider - that the ZFE almost never fails. My neighbour phoned them, very kindly. They reckon if I buy a replacement it'll have to be reprogrammed before it can be used, which is an annoying thought. They can look at mine, of course, and say that it will need to be reset seeing as I've disconnected it and mucked about. I don't know what that means, whether they're just talking about clearing the error codes. Maybe they'd be able to revive it by flashing it with a software update.

I'll have to think about which way to go as a first step.


Morning Boot

Sorry I didn't open your link (I seldom do unless it is linked to a specific picture).

In any case I doubt that you did anything to your ZFE by disconnecting it and mucking about as they are pretty locked in with both firmware & software being protected.

We still don't know for sure if your ZFE has actually failed (a few pointers that direction though) but noting solid.

I have seen so few ZFE failures that I have no idea on why yours would fail unless it saw high voltage a number of times.

If yours has failed it is more than likely a capacitor or diode failure-- if your neighbor has any basic electronics background maybe he can spot (or better yet smell) a failed component & replace that failed electronic part.


D.R. ___
Sent from my rotory dial wall phone!
#985425 - 04/22/17 02:05 PM Re: Interchangeability of used ZFE units [Re: Boot]  
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Thanks for the ideas again dirtrider. I'm glad you think the ZFE should still be intact software-wise despite my fiddling. Which assumes it isn't shot, of course.

I'm handy enough with electronics myself to replace a bad capacitor or diode, but you can only access the back of the ZFE's PCB without damaging the casing. There's nothing to see on the back except for a lot of traces and a few resistors. On the other side, the male connector pins seem to be permanently attached to the plastic case and PCB, holding them together, so you can't access most of the components. It's a throw-away part apparently.

#996429 - 09/09/17 08:01 AM Re: Interchangeability of used ZFE units [Re: Boot]  
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#996441 - 09/09/17 12:41 PM Re: Interchangeability of used ZFE units [Re: Boot]  
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Originally Posted By: Boot
For the sake of historical completeness, I'm updating this old thread in case any other poor sod suffers the same symptoms and turns this up through a search:

After phoning around to various BM shops, I learned that only a dealership can flash the ZFE. What's worse, a ZFE cannot be re-used on another bike because each one is set at the factory to work with only a single VIN number. So all these units for sale second-hand are useless. I therefore had no choice but to take the bike to a dealer, who immediately got a fault code indicating that the ZFE was not receiving power - even though we knew it was. So he ordered a replacement ZFE from Germany and installed it several weeks later when it finally arrived. This solved the problem, vindicating my unlikely diagnosis, which was the only consolation for the AUD1200 bill for parts and labour, not to mention all the inconvenience.

Apparently it's a similar situation with the instruments and Motronic module. I was told that they can't be swapped between bikes either.

I don't know the reasoning behind all this, whether it's some kind of anti-theft measure, but it sure is a nice little earner for BMW. The way that the ZFE is effectively a sealed unit means that you're up for big bucks even if it's a simple blown capacitor (not that I could see any capacitors in there by peaking through the gap).

Why did my ZFE die? I don't know. I'd had my solar charger hooked up to it for about ten years with no problems. The battery voltage never exceeds 12.8 or so because the current is so low. I do occasionally hook up a manual battery charger for a brief burst of juice when needed, but I can't remember doing that prior to the troubles. Maybe I did, and maybe it overcharged the battery, and fried the ZFE. Or maybe the ZFE just expired because it was Mercury retrograde at the time. Who knows? I have a Noco Genius G1100 automatic charger on the way just in case it was an over-voltage state that caused so much grief.

Spring is here in the Southern Hemisphere...


Reposting Boot's post. It was the ellipsis character.

#996443 - 09/09/17 01:25 PM Re: Interchangeability of used ZFE units [Re: Boot]  
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Reply to Boot

BMW does warn to never exceed 15 volts to the bike's battery (charging, jump starting, etc) without disconnecting the battery from the bike's electrical system.

Some battery chargers do exceed the 15 volt input if they have a battery reconditioning cycle or desulfation cycle.

Will a single 15v+ input kill the ZFE or other onboard computers? --Probably not, but still not suggested.


D.R. ___
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#996588 - 09/11/17 08:02 AM Re: Interchangeability of used ZFE units [Re: dirtrider]  
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Thanks mnTwin! I pasted that text in from elsewhere, and couldn't work out why even editing it twice didn't seem to make it appear. I chalked it up to sheer insanity, and gave up for the day.

DR, I am now voltage-paranoid. The NOCO charger arrived in the mail, and my voltmeter registers just over 15.0 volts at the peak of its maintenance cycle before it cuts off. So hopefully this will be approximately acceptable to the new ZFE. I sure hope so.

As an extra note, the new ZFE and firmware seem to hate my HID headlights. Low beam is registering a fault now when it was usually fine before. So I've routed the high beam to power the low beam for the moment, and have ordered a CANBUS capacitor thing from eBay that will hopefully fix the problem. I do seem to have slightly smoother running on a closed and slightly open throttle, with less popping through the muffler and drivetrain snatching. Looks like BMW have richened the mix up or something since my older firmware. I'll be interested to see if I still get 450 to 500 kms (280-310 mi) per tank.

#996591 - 09/11/17 11:02 AM Re: Interchangeability of used ZFE units [Re: Boot]  
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Originally Posted By: Boot
Thanks mnTwin! I pasted that text in from elsewhere, and couldn't work out why even editing it twice didn't seem to make it appear. I chalked it up to sheer insanity, and gave up for the day.

DR, I am now voltage-paranoid. The NOCO charger arrived in the mail, and my voltmeter registers just over 15.0 volts at the peak of its maintenance cycle before it cuts off. So hopefully this will be approximately acceptable to the new ZFE. I sure hope so.

As an extra note, the new ZFE and firmware seem to hate my HID headlights. Low beam is registering a fault now when it was usually fine before. So I've routed the high beam to power the low beam for the moment, and have ordered a CANBUS capacitor thing from eBay that will hopefully fix the problem. I do seem to have slightly smoother running on a closed and slightly open throttle, with less popping through the muffler and drivetrain snatching. Looks like BMW have richened the mix up or something since my older firmware. I'll be interested to see if I still get 450 to 500 kms (280-310 mi) per tank.


Morning Boot

Your new ZFE should not have any effect on your engines fueling or running richer. Any change in engine runability is more than likely due to the long battery disconnect as that deleted all the fueling computer learned fueling adaptives.

It should slowly learns it's way back to where it was before.


D.R. ___
Sent from my rotory dial wall phone!
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