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| Posted: Wed Aug 02, 2006 7:34 am Post subject: BMW E39 odometer changes back when battery is disconnected |
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Hi there
I have a 4/1997 BMW E39 - I sucessfully managed to change my mileage using the TACHOPRO interface - HOWEVER, if my car batterey gets low or is disconnected - it resets to the prvious mileage.
Can anybody help me? |
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DashfixDotNet
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Joined: 20 Nov 2004
Posts: 297
Location: USA
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| Posted: Thu Aug 10, 2006 2:19 am Post subject: : BMW E39 odometer changes back when battery is disconnected |
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Hello,
I bet your cluster is a SW13 with IKE (black box on the back of the cluster). On this version (and a very few people know it) you have to adjust the LCM...it's mandatory or it will overwrite it if the cluster is disconnected or the battery is discharged. First, turn the key on, program the cluster thru diagnostic to the number you want, then program the LCM to 0 mile. Then cycle the key to OFF (keep for a few seconds) and them back ON. And that's it, your problem will never occur again even if the battery is disconnected and reconnected back.
Serge |
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Edmond
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Joined: 06 May 2006
Posts: 17
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| Posted: Thu Aug 10, 2006 6:28 am Post subject: : BMW E39 odometer changes back when battery is disconnected |
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Hi Serge,
The same thing happen to a 99 VW New Beetle. My DIGA does not have any other menu but only the menu to programme the cluster thru. OBDII. Why the old KM come back when changing the battery?
Regard.... |
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DashfixDotNet
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| Posted: Sun Aug 20, 2006 5:18 pm Post subject: : BMW E39 odometer changes back when battery is disconnected |
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Hello,
The same thing happened on your Beetle because you did not drive at least 100KM between the moment you change the mileage and disconnect the battery. What happens is that when you change the mileage via diagnostic on a Beetle ot Audi TT you actually change it in the ram part of the micro. A ram memory can keep its info if it is powered constantly. If you disconnect the battery it will lose it! So at the next power-up it will read from the eeprom memory. It's only after 100kms of driving that the info is dumped from the ram to the eeprom. Just do as I say, change it again, drive a 100km or better a 100 miles then stop and disconnect the battery for a couple of minutes, re-connect it back and see if the mileage has changed. I bet you it hasn't.
Serge |
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adrock
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Joined: 03 Sep 2006
Posts: 14
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| Posted: Sun Sep 03, 2006 3:28 am Post subject: E39 Odometer |
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Hi Serge
Thanks for your insight into my E39! Forgive my ignorance - but what do you mean by LCM reset to zero? (I havent had my E39 long...) is this something I require additional hardware for or something I do through the the dash?
Cheers
Steve |
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DashfixDotNet
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| Posted: Tue Sep 05, 2006 7:16 am Post subject: : BMW E39 odometer changes back when battery is disconnected |
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Hello,
By saying "...reset the LCM to 0 mile..." I meant REPROGRAM it to 0 mile or KM if you prefer. At the next key cycle the dash will overwirte the LCM (light control module) and not the other way around. You can do it either by working directly on the memory chip (of the LCM) or via diagnostic connector if you have the software and the hardware for it.
Serge |
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adrock
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Joined: 03 Sep 2006
Posts: 14
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| Posted: Sat Sep 09, 2006 4:32 am Post subject: E39 |
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Hi Serge
I have TACHOPRO V2 - with german software - will this do it? if no - that do I need?
Cheers
Steve |
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DashfixDotNet
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Posts: 297
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| Posted: Sat Sep 09, 2006 3:38 pm Post subject: : BMW E39 odometer changes back when battery is disconnected |
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Hello Steve,
I do not have this programmer that you mention. On this forum we're pro Diga-Consult. If you get a Diga then you'll have no trouble working on those.
Serge |
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adrock
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Joined: 03 Sep 2006
Posts: 14
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| Posted: Mon Sep 18, 2006 11:07 am Post subject: E39 LCM and IKE |
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Hi Serge
Just curious - is it mandatory to cycle the key to make the changes to the KM's permanent? I have managed to source software that can edit the IKE and LCM - however it still returns to original KMs upon the disconnection of the battery.
I am wondering if I perhaps didn't cycle the key correctly? otherwise Is there any other things I should try?
Kind regards
Steve |
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Haris
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Joined: 07 Dec 2005
Posts: 12
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| Posted: Tue Sep 19, 2006 3:55 pm Post subject: : BMW E39 odometer changes back when battery is disconnected |
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| DashfixDotNet wrote: | Hello,
I bet your cluster is a SW13 with IKE (black box on the back of the cluster). On this version (and a very few people know it) you have to adjust the LCM...it's mandatory or it will overwrite it if the cluster is disconnected or the battery is discharged. First, turn the key on, program the cluster thru diagnostic to the number you want, then program the LCM to 0 mile. Then cycle the key to OFF (keep for a few seconds) and them back ON. And that's it, your problem will never occur again even if the battery is disconnected and reconnected back.
Serge |
Hi!
I`m surprised that you say that SW13 you can do with diagnostic! My diga manual says it could only be done by soldering!
any comments? |
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adrock
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Joined: 03 Sep 2006
Posts: 14
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| Posted: Wed Sep 20, 2006 1:30 am Post subject: E39 |
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By the way - my when using PA-SOFT it says my IKE is SW15??
(does this mean anything?) |
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adrock
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Joined: 03 Sep 2006
Posts: 14
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| Posted: Wed Sep 20, 2006 5:33 am Post subject: E39 |
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I am also reading about "direct programming" (soldering in an interface) the M35080 chip - is this perhaps what is required to stop the display returning to its original mileage?
Many thanks
Steve |
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DashfixDotNet
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Posts: 297
Location: USA
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| Posted: Thu Oct 05, 2006 7:02 am Post subject: : BMW E39 odometer changes back when battery is disconnected |
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Dear Haris,
If you have noticed in my first reply I say "sw 13 WITH ike" and not WITHOUT ike. Indeed sw 13 without ike cannot be done without removing the instrument cluster.
Serge |
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DashfixDotNet
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Posts: 297
Location: USA
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| Posted: Thu Oct 05, 2006 7:13 am Post subject: : BMW E39 odometer changes back when battery is disconnected |
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Dear adrock,
It is very strange that pasoft shows you sw15 when another programmer shows you sw13. I would trust pasoft but if your cluster has two push buttons and is a sw15 then the eeprom is a m35080, which means the mileage cannot be done thru diagnostic port, which also means (if it's the case) that this is not the original cluster and has been replaced by the dealer; for if this is the original cluster bmw never manufacturered sw15 version in 1997. They started in '99. So if your cluster has two push buttons in the front and you're able to change the mileage via the diagnostic port, it is definiyely not a sw15.
The only remedy to your problem is to set again the mileage in the cluster and the lcm and drive the car a 100 km. It should be way enough for the ram memory to dump the data into the eeprom. Then disconnect the battery and reconnect it.
Serge |
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Haris
Junior member
Joined: 07 Dec 2005
Posts: 12
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| Posted: Thu Oct 05, 2006 12:40 pm Post subject: : BMW E39 odometer changes back when battery is disconnected |
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| DashfixDotNet wrote: | Dear Haris,
If you have noticed in my first reply I say "sw 13 WITH ike" and not WITHOUT ike. Indeed sw 13 without ike cannot be done without removing the instrument cluster.
Serge |
Ok! I got it!
it may sound dumb, but what exactly is this IKE? I havent done much BMW so i haven`t noticed this name before... |
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