NefMoto

Hi, Collegues!
Did you know we can tune gauges in our instrument clusters?
IC eeprom contains maps of speedometer, tachometer, coolant temperature, fuel level gagues.
And you can tune them.
For exapmle in speedometer gauge you can install any scale from other cool IC you want and then tune arrow positions accordingly. Also you can remove +5..+7% increase in speed reading values in comparing with GPS (you can make your speedometer exact!)
Another example is switching from diesel to benzin IC, you can tune RPM accordingly.
Also non-linearity and stickness to 90C of IC coolant temperature gauge can be solved.
Additionally you can remove non-linearity of fuel level in the tank displayed on the gauge.
To start this tread i suggest you my discoverings on average VW(Skoda) A4 IC 1U0920811B.
There are 8 maps
Speedometer arrow positions - inside IC there is just a simple stepped motor with table of positions
Speedometer sensor values - in km/h that are translated into arrow positions
Tachometer (RPM) arrow positions - a table of stepped motor positions
Tahometer (RPM) sensor values - a table of sensor values that are translated to arrow positions
Temperature (coolant) arrow positions
Temperature (coolant) sensor values
Fuel level arrow positions
Fuel level sensor values
Will continue this thread with my tuned values. Stock maps you can discover in almost any A4 platfrom instrument clusters. EEPROM just arranged in different block sequences.
See attachment of Skoda A4 (Octavia Tour) instrument cluster. If you see your IC EEPROM structure is the same you can apply these maps to your cluster. I will help to find out where map locations are in other VW-like IC dumps (i have big collections of IC dumps).

Here is mine:

Luckily, it looks like maps have same offset as in yuor cluster (i will check tomorrow in details). Just import the .kp into your .ols. You will see your "linearization" maps are my "arrow positions". My sensor values are addition to your linearization maps.

This is very cool. I have a car with an aftermarket fuel tank, and have tried a few different solutions to get the sending unit to work with an OE cluster. Thanks for sharing!

thanks.

Cool stuff.

Important note: to get rid of "DEF" error after you have customized your IC it's enough just to do "recoding" in VCDS/VAG-COM. You do not change the old coding value, you just leave it the same (or copy-paste old as new one) and then click OK. It will recalculate new checksum automatically and will remove the "DEF" error from IC.

My speedo reads faster than I am actually going by 5 mph @ 40. Would I adjust the needle position map by whatever percent to all the values? Do I also need to adjust the sensor value map? Or, do I just adjust the sensor value map? Thanks.

Very interesting, I hate the temp gauge sitting in the middle when it's not 90 degrees

At first step of tuning I would suggest you just increase sensor readings approx. by 5%, this was my first tuning experience. For instance, you had seen speed 100kmh but your GPS showed only 95kmh, then increasing by 5% sensor reading values will reduce this difference, at speed 100kmh you will see approx 100kmh on the scale.

Next step of my tuning of gauges was - linearize everything. Arrow position is just imaginary angle position of stepped motor in the IC. So, you calculate start of the scale, calculate end of the scale, calculate how many labels(segments) on the scale and you get linear position, for example stepped_motor_pos/per km_h, or stepped_motor_pos/per grad_c
Then you build your own linearized scale from the scratch.

Thanks for the help, Automan! Hopefully going to try this tonight.

Oh wow I just posted a thread in another section about this, should've checked here first. Has anyone tried working with a B5 cluster? I'm trying to linearize my temp gauge but I can't find anything in the EEPROM that fits the description of what I should be looking for.

Post here its dump. Or try to search in that dump following hex string: "F0 00 90 01 50 02 60 03 E0 03 10 04". It's the stock temperature sensor map. 6 words(16bit). If you divide the word by 8 you get temperature value in grad.C. For instance Swap(10 04) = 0410 hex= 1040 dec / 8 = 130 C. In human readable format the temperature axis looks like 30    50 74 108 124 130. The temperature axis is almost the same as in many VW A4 clusters. After you've found this map, next 6 words is the map of needle positions for the temperature gauge (=your "linearization map").

Dump is attached. I never knew the numbers were in a human-readable format, everything I've read treated them as arbitrary values. I was also expecting a pair of repeated values in the middle since that's what people were saying to look for. I plotted your values and I do remember coming across a similar looking curve when I was searching but forgot to save the location.

As an aside: how do you find the location of the bits that control lighting and stuff like that?

Hi!

I attach my dump from Audi S3 8L 2001 (facelift).
I might have found some axis at 0x196 and 0x31A  but these have only 4 points and have the values a little bit different.
sequence is F0 00 89 01 E1 02 39 04

If you have the maps for this binary it would be great.

Regards!

Found Speedo, Tacho, Fuel gauges, except Temperature. Can you make photo of your cluster? (To compare found figures with) I hope from the second try i will finally find it. It was not so easy as I thought. Picture with locations is attached.

Found Speedo, Tacho and Fuel gauges. Temperature gauge is still not found. Will retry searching using different method. Locations of your gauges are similar to previous dump. Picture of your cluster gagues would help to make sure that found values are correct.

Hi!

Thanks for sharing your findings. About the temperature gauge map, I think it is the one indicated by me, but as I said it seems different as it only has 4 points.
Here is a photo of the Audi S3 8L cluster.

Regards!

Here is my cluster. Thanks for taking your time to do this, I really appreciate it.

Just took a look and the values you found seem to make sense. The speedo sensor map goes up to 262 when divided by 16 and the tach map goes to 7727, which is basically as far as the tach goes.

+1 :)

In fact you can change more things at least in 1Jx/3Bx/1U0/3U0/7Mx IMMO3 VDO clusters.

The most important thing is to dinstinguish between VWK501 and VWK503 clusters as there is difference in EEPROM locations between them.
To my best knowledge:
 - 1Jx 920 xx6 clusters are VWK501 (1J0 920 x46G is exception as it is VWK503 and as only Golf cluster I know uses ABS as default speed source)
 - 1Jx 920 xx7 clusters are VWK503
 - 3B0 920 xx5 clusters are VWK501
 - 3B0 920 xx6 clusters are VWK501
 - 3B0 920 xx7 clusters are VWK501
 - 3B0 920 xx9 clusters are VWK503
 - 3U0 920 xx1 clusters are VWK503
 - 3U0 920 xx2 clusters are VWK503

Very important thing if you want to have accurate speed and distance readings is to properly set K value. If your cluster is set to use gearbox sender as speed source (as there are clusters which use ABS as speed source by default and you can change most clusters to use it) you can calculate proper K value using your wheel diameter. You need to calculate how many rotations your wheel needs for 1000m and then multiply it by 7 (as gearbox sensor sends 7 impulses per wheel rotation). The tricky thing about using your custom K value is that after recoding using same coding as before (to recalculate checksum and remove DEF error) you are loosing your custom K value. For VMK501 clusters there is easy solution - you just need to set your dump to have 0 as last digit of cluster coding. For VMK503 clusters there should be a solution but if you set the dump to have 0 as last digit of coding the DEF error will not be cleared. Do not forget that speedometer scale/stepper motor settings are also covered by checksum protection.

Small gauges (fuel, engine and oil temperature and battery voltage) stepper motors have 1500 steps while big gauges have at least 4500 steps.

Here are addresses for VWK501 (VWK503 in brackets when it is different) clusters:
 - 0x065 - speed source setting (0x80 - gearbox sender, 0x81 - ABS)
 - 0x08A [0x0C8] (3x1 map) - number of keys (you have to divide by 11 as it has 11, 22, 33... values), value is stored 3 times
 - 0x145 [0x187] - fuel consumption correction (0x64 - means 100%, no correction) - in IMMO2 clusters it used to be adjustable using adaptation channel
 - 0x150 [0x192] - K value stored as LoHi 16 bit number
 - 0x1D2-0x1D3 [0x204-0x205] - buzzer sound frequency (2 8 bit values)
 - 0x1D4-0x1D5 [0x206-0x207] - buzzer volume (2 8 bit values) - this one does not seem to work at least for me
 - 0x1D6 [0x208] - another setting for buzzer (length of the sound)
 - 0x1ED [0x21F] - lower 4 bits of this byte sets what are iluminated upon switching ignition (0000 - no ilumination, xx11 - displays, x1x1 - gauges, 1xx1 - needles, to combine just sum bits)
 - 0x1EE [0x220] - cruise control lamp setting - when set to E9 it works when CC is switched on, when set to F9 it works only when CC is actually working
 - 0x200 [0x238] (2x1 map) - 2 8 bit numbers which determines when (temperature) information about slipery road is displayed
 - 0x230 [0x268] (8x1 map) - 16 bit LoHi stepper motor map for speedometer
 - 0x248 [0x280] (4x1 map) - 16 bit LoHi stepper motor map for tachometer
 - 0x270 [0x2A8] (8x1 map) - 16 bit LoHi conversion between fuel tank sensor and fuel in litres (I am not sure how to tell if axis at 0x250 or at 0x260 it used [0x288/0x298])
 - 0x290 [0x2C8] (8x1 map) - 16 bit LoHi stepper motor map for fuel gauge
 - 0x2A0-0x2D3 [0x2D8-0x30B] - it seems that even Golf cluster has maps for oil temperature and battery voltage gauges
 - 0x2E0 [0x318] (6x1 map) - 16 bit LoHi stepper motor map for engine temperature (you can correct it to show real temperature, not 90*C between real 74 and 108*C)
 - 0x416 [0x44E] - set it to 0xE1 to activate showing range/RKM/miles to empty
 - 0x417 [0x44F] - set it to 0x6B to show Welcome message (only xxx 920 x4x full FIS clusters)

Proper factors:
 - speed in kmh - 1/16
 - RPM - 1
 - fuel in litres - 1/8
 - temperature in degrees celsius - 1/8
 - Ohm - 1

Has anyone figured out how to eliminate the flashing key symbol if you don't have a key matched to the cluster? Other than blocking the led/removing it? I know it's not a super big deal to use those other methods, just curious!

That is in the MCU....

Not quite sure what the MCU is. The car is immo defeated, and I have a spare key taped in a bundle under the dash. Just trying to eliminate some mess from a car that was built 5+ years ago.

Fantastic info! :)

Some questions: what size are the voltage and oil temp maps? I've found everything but those two, I have 2 potential locations but it seems 1x4 maps fit better than 1x6. What's the voltage value divider? 1/16 seems to fit with the potential voltage map I've found but for all I know it could be the wrong map anyway. Finally, is there any good way to find the illumination bit other than changing it and hoping it works? I assumed mine has a value of 30 since only the screen comes on with the key, seems to be at 0x1A0 which is immediately after the fuel needle position map and near where i think are other config bits like fuel consumption correction, road temp warning, cruise control light, etc.

If I do make a change that the cluster doesn't like, is it possible to brick it into not accepting an eeprom reflash through the kline? That's really the only thing prevent me from trial and error-ing the locations.

Great info!!!!!!!!!!!

I am really sorry but I do not have any 7Mx/4B0/8D0/... EEPROM handy. If you can attach one to your post I can try to help you.

Please post your instrument cluster part number at least (or EEPROM dump which will make my life easier).

Can not tell you for sure but once my laptop battery suddenly died during programming. What I did was to restart programming session without switching off power to the cluster and it worked.

Please post your instrument cluster part number (or EEPROM dump). Or if you want to try on your own just try to find 0xF4 0xF7 in your dump and set it to 0x04 0x07 (I am not sure if it will work but someone told me it should).

I posted my EEPROM dump earlier in this thread: here (http://nefariousmotorsports.com/forum/index.php?topic=7964.msg73048#msg73048).

This is the list of maps/bits I've got so far, everything with a ? at the end I'm not sure of.

Just tried this, and it made the whole instrument cluster go dead other than the battery light and the time/mileage. :)

After looking into your dump:
 - your speedometer map seems correct
 - your tachometer map seems correct
 - oil temperature map might be located @0x134 (6x1, axis @0x12A) - but it would be correct only if the gauge shows up to 130*C
 - engine temperature map is @0x14B (to make it linear set values to 0, 0, 474, 864, 1200, 1420 - if those will be a little bit off just check what gauge is showing at real 80 and 90*C)
 - tank sensor reading to fuel quantity maps are @0x16E and 0x2F2 (both 8x1)
 - fuel quantity to fuel gauge maps are @0x190 and 0x314 (both 8x1)
 - road temperature warning seems correct
 - I am not able to tell you anything about other settings

I do not have any other ideas/solutions (the only one is to make immobilizer fully functional ;) )

It's an old car with a new engine. I have a key taped in a barrel, but just wanted to see if there was a way to ditch that. Thanks for the suggestion anyway!

Here's a writeup of Audi xxx920xxx clusters - http://www.a6klub.pl/viewtopic.php?t=71730

I can translate it and paste it here if you want.

Google translate (https://translate.google.ca/translate?sl=auto&tl=en&js=y&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fwww.a6klub.pl%2Fviewtopic.php%3Ft%3D71730&edit-text=&act=url) does a good job, it gets the point across. This confirms that the maps are in the exact same spot in my bin, too bad the link doesn't mention anything about the 2 gauges I haven't found yet or any control bytes.

Not all information there is exact at least to my knowledge.
For example in your dump MadCow both fuel gauge (fuel quantity) maps are equal...

After some trial and error I found 0x1DE controls lighting in my bin. Default value is 35, but there's only 2 options: stock and everything lit. I messed worth it a bit and reverted to stock but now my displays are forever dim no matter what setting. Did I break something?

Maybe some resistor on the board of the cluster is gone.
IMHO it should not be all or nothing, it should behave like VW/Skoda clusters - using proper bits (in Audi clusters displays have to be constantly backlit as they are inversed and AFAIR it follows VW settings - bits 0 and 2 set).

That's what I thought too but I can't argue with results. Also noticed that sometimes the gauges don't move when I turn the key and the gas gauge vibrates, after a few seconds it's all normal.

How are you flashing your cluster? Via OBD, using a clip or desoldering EEPROM?

Flashed an old backup bin and everything's back to normal now. Setting the byte to 39 still lights up everything though.

gutted, time to get the tape out I guess

Flashed back the original, all good. Removed and de-soldered the led.

Now sometimes when I turn the car off or on I'll hear what sounds like a stepper motor jiggling back and forth quickly for a few seconds. And the cluster sometimes takes a few seconds to boot up too. Could it be that I have the wrong address for the lighting control bad this one just happens to work with some side effects?

From my experience - it works fully or it just does not work at all.

Hi mates.

Anyone have figured out how to remove DEF from 4Z7920930C panel(Audi allroad)? I was trying to calibrate K value. I was using 00160 coding, recoded same, still nothing. Any tips would be good.

You must write an encrypted, non DEF dump direct to the 24C16 eeprom on the rear of the board.

This panel are from 2001(not crypted). What you mean by encrypted?

How does one figure out the maps? I have it loaded in winols. I see what are obviously some maps. I am looking to invert the fuel Guage.  But how does one tell which is which? I tried zeroing out a few of the maps and loading it to the cluster, but nothing changed.  I have a 8L0920931Ex in a TT with a TDI.

Some clue and testing. You need to edit resistance vs liters scaling map, not edit gauge itself.

Would the liters v. Resistance map be located near the gauge itself - generally speaking?

It's not an RB4 crypto, but it's still encrypted.

ta79pr, I have most of the 4B/8D cluster binary mapped.

I have a 2002 A3 TDI (PD) cluster shoehorned into what was the housing for the TT cluster. Bin attached. 8L0920931Ex

So its like i take dump from cluster eeprom, then edit it and write back?

I am able to successfully read/write 24C32 with eprom programmer and 8-pin SOIC chip clips. Is there an easier way other than removing dash each time I want to make a change?

Yes?  Pull the EEPROM using a KKL cable?

I am not sure if I know what a KKL cable is? K-Line? If you mean K+CAN...there are so many versions out there...which would work with my vehicle? It is a 2006 TDI.

4Z7920930C is not crypted but some of its areas is covered with checksums or something like that. For example changing speedometer maps results with def error, but changing tachometer and fuel tank maps works ok. I have this cluster and one from late model C5 A6 which is encrypted.
From my experience easiest way to spot an encrypted Audi C5 VDO cluster is to look at the dump - it doesn't have that empty area at the 2nd half of dump, it's filled with data.
Since my engine is under rebuild process, I'm playing with Audi instrument clusters. Here's two very basic map packs I've put together for 919 and 920 clusters. Tested and works with A3 8L, A4 B5 and A6 C5 clusters. I'll update them when I find something more  :)

You are correct. I missed the 2001 part. The first encrypted cluster I've seen was late 2002.

Okay, but is there some solution with those clusters? Because now speedo error are like +10% not only 5% . Its hard to push for 5-10km/h more than i usually did.

Hello, i have a problem, and i dont know who could help to me. The thing is that i have vw passat b5.5. At firts it was UK version, but now i'm using it in EU. When i bought the car, instrument cluster was UK version, but the speedometer numbers (i don't know how to call it) was EU style. 0 to 260 km/h. I followed this theme (http://nefariousmotorsports.com/forum/index.php?topic=7964.15) and reprogramed cluster. The thing is that now from 0 to 100 km/h it's perfect, but if i go faster speedo starts to show lover values. And it drops down to ~75 km/h, even if im going at 150km/h.   Maybe you someone could take alook at my dump file.
By the way, i changed 0x0220 to 0x023F

Hi, someone can show me the both TEMPERATURE maps ?
Is immo1, little different from immo3...

THANKS in advance!

Hi!
Can someone help me add Welcome message to my Octavia 2?
Eeprom is attached.

I already found needles illumination at address 0122, but still can't find Welcome message byte.

Please help!
Thx!

I try to change temp "needle" map to linear in s3 8l.
I get def message and it wont go away if i recode cluster via vcds...
So how to correct chk for this eeprom ?

Attach your dump , if it's a 2002/2003 model year cluster it wont be easy to restore it..

Hello, i am answering on behalf of janne.
So here is the dump for s3 and its my 2001, we can fix the def problem if we write back the orig file.
Must be some checksum fail?

It shouldn't be , the checksum is in the speedomap , i will look at it later

Good that you can restore with ori dump

Well we allso changed speedo needle map so could be it  ::) , thank you allready!

Why did you change it?

I changed the background from miles to kmh speedo so the scale was not the same.
Speed and coolant are now correct, just need to get rid of the def problem.

Post your original dump  , you want to change from 160 mph to 260 km/h?

I guess you didn't copy alle the needed bytes ;)

ok i found that your cluster is 8L0920980L ( S3 in MPH ) , i attach a dump that should work ( changed speedo to 280 kmh as it should be done )  ;)

I will try it today, here is the original file if you still need it.

Thanks!

Compare the one I made and ori dump and you will find the byte that is responsible for the checksum ( it is not in the speedomap , a few bytes earlier )

Found the byte and cluster works allso.
Thank you!

hello, im trying to chnage the offset in my speedo. soft coding doesnt take, so it wont let me change the impulse value.

i have the address for table in my dump, just dont know if, how to change it. its off by about 7 mph below 50 then 9 above. any insight on this?

i have a vwk503 cluster. i saw i might get a def error? what is def error?( checksum?) and is it possible to do what i am trying to do? or change the impulse via the eeprom instead of softcoding?
thanks in advanced!

here is my eeprom. only things changed are cruise light, and gauge and needles lit

Change K value and recode for recalculate CHK ;-)

Probably a good a place as any to ask this:

Recently obtained a Passat 3B0 920 949A cluster (VW503) that I wanted to run in my Bora (MK4 Jetta).

Flashed it with a Euro R32 G (VWK503MH) dump, flipped the Odometer, Maps for speed, fuel, temperature (re-using the old Sport foils and the stock R32 temp and fuel gauges have a slightly larger span on their foils, hence if using different foils check that the data is the same between foil types -If not use the data relevant to the foils actually used; if you don't the needle span and position will be incorrect.  Not by much mind but enough for you to notice.  Also carried over the VIN, IMMO, from my old clocks & also enabled MTE and the welcome message etc.

After a day or two of pretty much messing around I wrote some wee tables in excel to interpolate recalling and also the coolant gauge dead zone.  The latter works a treat but there's something still a little amiss with my rescaling as the needle sweep span on testing is not quite correct

All appears to work fine on the cluster and I have the later 1C0 CCM so no issues with door open, lights left on chime blah blah...

However I have two small issues remaining that are bugging the life out of me -

Open door displays the Golf rather than the Bora/Jetta - Anyone know where this exists in VW503 code to change between Limo/Kombi etc?

Cruise control surges when enabled.  I assume this is to do with a mismatch between CAN speed and analog speed or something similar.  So apparently this is resolved by clearing the LSB of 0x65  or changing the value from 81 to 80.   However when I try to do this I get a dEF error that I cannot clear.
Edit:  Sorted the dEF error.  Not quite sure how but for whatever reason the following sorted it; set 065 back to 81, installed in car for testing then had the cluster back on the bench and refreshed with 065 set to 80 and no dEF error.  Don't think the previous attempt was bad flashes but it's sorted now.

So just one issue to resolve now: Any pointers regarding the FIS vehicle pictogram/image address and values would be greatly appreciated!

I just bought face pads with kph to replece USA mph to EU standards on my cluster and problem is that they are scaled up to 280 kmh when USA were 260 kph. I read on this forum that it is possible to modify eeprom file of cluster to reprogram behave of a gauges. Can someone point me how to do it. Is this possible to edit eeprom with vagcanpro cable or must use other tool. Any help welcome. thx in advance

here for you all

dashdumpedit

easy tool to mod your tacho and also needlesweep for vwk501 and 503.
sitelink just open program ;)

I have bought a 1U0 920 841J cluster full fis (KPH) for my 03 Skoda Octavia, but the speedo scaling is wrong when I fit my UK (MPH) foil, I believe this can be altered via the EEPROM data ?  I would also like to have the "needle sweep" & illuminated needles ?

Attached is the eeprom dump if that will help ?

How did You read eeprom,  which tools have You used?

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I used vagcommander 3.6 k+can to get the dump data

If you read the post above, you'll see it helps.

If you mean the download for dashdumpedit ?  every time I try and download it windows defender stops it from downloading as it contains dangerous content ??

Well my cluster is kombiinstr J285
Model 8r0920981n
Will it work?

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So you expect someone else do download it and infect their computer?  Live dangerously.

It's a Q5 cluster? I doubt if you will find any free software that will be able to read it , and editing the dump isn't an easy task , espacially with these new clusters.

Yes it's 2016 q5.  So not possible to edit this using winolx as in opening post? Can it be adjusted in vagcanpro or in any other way?

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What's a winolx? Rather search for magic  dash can or something similar

I can see that I can connect to 17cluster using vagcanpro  and read part of eeprom but just 248bits of if when start from adress $100 of it instead of 2048 as in other dumps. Do You know where is it located or how to read it?


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DONT USE CLONE VCP for eeprom!!!!!
it dont work... only original VCP works with eeprom ;)

Well clone worked very well to change eeprom in 5f mmi3g+ in USA to eu conversion,  why won't it work with instrument?

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Who here can tune these clusters?  Tried messaging OP.  I need mine tuned and will pay!! PM me!

What do you mean tuned?

I'm willing to pay for helping me read eeprom from q5 8r same as a4 b8 as I need to adjust speed arrow on scale

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Hi everybody,
Temporarily I'm not into tuning clusters. I've changed my job and now there is less time for my hobby (clusters & ecu). Also I've changed my car to a newer, so there is no real car to make experiments. It doesn't mean I quit. Post your dumps here, ask here and maybe I or someone else will answer.

In general the steps how to modify cluster is very simple:
- You should read dump of your original cluster
- Optionally, get dump of the other cluster, covers of which you like (ask those who own such clusters or find in the internet)
- Find curves in the dump (tables with arrow positions). When you open them in WinOls or in something similar you will see shapes
- Change them, or just copy paste areas from the cluster you know fits your covers
- Load the new dump into your cluster
- Enjoy result ;)

For some period of time I used VAG K+CAN cable with VAG K+CAN Commander software to read dumps. Also you can read them by using cheap Chinese K-Line (VAG-COM) cable clone & VAG EEPROM Programmer software.

Perfect I do have 17.3 vcds cable from aliexpress. Can I use it for Kombiinstr J285, 8R0920981N, driver H35 soft 0567 with vag eeprom programmer.  If yes can You please describe which values to use with it to read eeprom from my car?

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8N marelli cluster

Address 0x38 0x39

CE FF = 170mph dials

CD 9E = 160mph dials

it fucks my coding up at a mk5 and mk6.

Can you plese be more precise?
Which tool should I use? Vagcanpro?
Can You guide me step by step.

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Only thing which I can get thru vagcanpro is to read a few bytes from $100 as on pictures but nothing comparable with posted above Marelli pattern (https://uploads.tapatalk-cdn.com/20180120/f333239f0c91ff38172b57e1758382a9.jpg)(https://uploads.tapatalk-cdn.com/20180120/a9f3f11a7fa19edb11045ae8641904a4.jpg)

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i posted so i dont forget what the change is. 

Very rare to have 170mph silk screen on mk1 TT clusters. I then successfully crossed flashed immo 3 cluster to different part number

I See mine is q5 and not to to so totally different story.  Do You know howto do it in  J285 Marelli for 8R

I’ve found scalers in Marelli are single byte

Luckily I have 2 files 170/160 to compare between

Can You tell me which chip is eeprom and how to read it,  I suppose unsolder and read on programmer on USB via pc cause is only way.  Do You know if just changing eeprom chip from other cluster will work or  this way I will trigger component protection?.i ve bought full eu cluster but with monochromatic display from pre facelift q5 and want to change eeprom chip and don't know the easiest way.

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Has anyone used this approach to change the soft coding for their cluster?  It seems like it should work as long as it isn't checksum protected. 

Does anyone know offset for speedo and rev needles in 8p0920932 clusters? To convert a cluster from UK to an European version?

Hello, could someone please look at that. I have transmitted the data for immobilizer, speedometer and RPM.
In particular, if the checksum fits.
I have transferred the data from 1 to 2. The result is the 3.
Many Thanks

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Hi, can someone help with rescaling tacho to 320km/h. Now is to 280.

I am new here, and have been reading through a lot of the information on here. I'm willing to learn and figure what I want out, but if possible would like to know I'm starting in the correct place at least.

Vehicle is 8n TT with MM cluster. Vehicle I will be trying to make this work on is a 2001 that I currently don't have access to, however I pulled the bin from a 2004 to see if I could start doing some of the legwork.

I used VAG commander 2.5, and reading Direct MM, as I read at one point was best, got a very small file. Using Shadow1 (not Shadow3/TT - no response on that) it gave me a much larger file that I think is correct, it has the correct PIN and even shows the warning messages. This file(tt1) appears much larger than the ones in this thread that have been modified, and does not appear to show the mileage where the user manual for VAG Commander says it should be, but again, I am very new to this.

If anyone could take a quick look at these to let me know I have a good file to start with, and that I'm not reading it incorrectly, I would very much appreciate the help.

Thanks,
Dave

This file contains virus:
https://metadefender.opswat.com/results#!/file/bzE5MDIyNVN5UWdlak1JLUxOSHk0Z3hvZlVXOFY/regular/multiscan (https://metadefender.opswat.com/results#!/file/bzE5MDIyNVN5UWdlak1JLUxOSHk0Z3hvZlVXOFY/regular/multiscan)

Clean file (from https://www.drive2.ru/l/471768829593126099/ ) in attachment.

Hi, maybe someone can help rescale speed from 280km/h to 260km/h. Changed gauges from mph to km/h, car is 2002 audi a6 2.7t. Cluster 4B0920981P. Thanks

A few quick tips for everyone and for myself. Recently i needed to read an IC and change gauges. After not dealing with this for a long time I totally forgot which tools to use and how to overcome the "DEF" error after changing EEPROM.
Cheap vag k+can commander cable KKL cable with VAG EEPROM programmer 1.19g software
can read EEPROM from these ICs
When you flash modified eeprom back you might get "DEF" error. Just do coding using VCDS, do nothing (do not change existing value) - just click save, the checksum will be recalculated by IC itself and error should disappear after that.

It doesn't work for audi clusters - the checksum isnt connected with coding like in vw clusters

I have a question. I have a 2007 Audi RB8 cluster with gas cap light on. Car has different engine and ecu swapped in. I cannot get the light to go away. Is there anyway to code this light out???

Remove the led or mask it :)

Can you send a photo how this light looks because in euro clusters never seen one :)

It is displayed on the DIS. So from the research I ve done on B6 cars there was a sensor. On B7 cars there is no sensor it’s based of of pressure in the tank. However this car has a ME7.1 ecu and 2.7t engine swapped in the light is always on since the swap. I am not sure if it’s a communication issue from ecu to cluster but I believe c5 a6 and b5 s4 also have this function however I believe they have a inductive sensor. Any help would be great.




. (https://uploads.tapatalk-cdn.com/20200308/f85b4e93b6fe2cf4f07bdd36ddc47356.jpg)

Many thanks for this elaboration - It was so intimidating not knowing what to look for - Kudos!!

I needed to modify the fuel level and volume values for a Passat B5 cluster to be used in the VW T25/T3 Transporter Van. This makes it so easy.

Cheers!!
John

Based on the 1U0 920 811 D EEPROM in the first post of this threat, I investigate addresses and maps to unterstand how infos are stored.

I found a few more like IMMO-ID, car VIN, VAG-Nr. etc.
What I still struggel with is Login-Code :(

VAG EEPROM Programmer tells me, Login-Code is (0) 35 60 of this dump, but I still did not find these patters in E2 ? Two bytes before IMMO-ID there aren´t ..
Can some help me and "open my eyes" on this ?

Does anyone find, where checksumm of the EEPROM is stored and how to calculate, when chancing maps ?
Does re-code after re-write do work also at Audi clusters ? (I unterstand not.. )

Thanks for advice
Jochen

And how is it possible to calculate ck for audi cluster?  ???

its stored 3 times backwards  3560 becomes 0D E8  so in hex dump look for E8 0D E8 0D E8 0D

Hi, im new in here, but folow the forum for a long.

i need Speed sourve to abs for audi a3 8l. i thing its encrypted and can find it, i have done in passat, polo and mk4, but cant find it on a3 dump.

file attached..

can't change that in Audi A3 8L and similar generation clusters ( a4 b5 , a6 c5 ) - wire up speed signal cable from ABS/ESP

Ok it’s not possible? I see that Audi make that on Audi A3 Quattro. I’m just wondering why it’s not possible like other cars in the vag “family“.

Its posibble only on newer generations like a4 b6/b7 because then audi mounted gearboxes without speed sender.

What do you mean a3 quattro? Which model exactly?

I have two meters from golf 4 First: 1J0 920 826K and from Skoda Octavia 1 second: 1U0 920 841C.

The speedometer from the Golf works on the speedometer after CAN and the VCDS can see the speed.

I changed the entry in Octavia bin at address 0x065 to ABS and the speedometer shows on the meter, but not in VCDS.

Where else do I need to change the "octavia.bin" batch to make it work?

(https://i.postimg.cc/vTDzYgv2/IMG_20201101_172134424.jpg)

On the speedometer of the Golf R32 shows the gears P R N D S and  1 2 3 4 5 6.
https://youtu.be/yJiEkiC1Pig

I think you should edit ecu soft to read speed from can ( there is a such topic on forum )

The ECU is already changed and does not display.

Do you have more details on this wiring from ABS module to cluster?
I have looked at every pin of my A3 ABS module on ElsaWin, and there is no (at least documented) VS output on any ABS pin.
If you have this information, will be a simple task to wire to the cluster.
Thanks.

Rnsd or bns uses analog signal from abs - search how its connected to them

I saw this pins on the ABS diagram of my car once ago. But I hooked up the osciloscope on them, and no signal at all.
I think this be a coding situation, or an ABS generation. My A3 has no ESP.

Yes I guess it depends on abs/esp controller

Yeah, I tried all related solutions like this.
I solved this with Arduino, its working fine. But if I have a chance to revert to a more OEM solution, I would go for sure.

So you made a can signal converter?

Initially I used an VR to Hall converter, with built-in signal divisor (to calibrate the speed).
Then I spent around 3 months working with arduino and MCP2515 to get the VS from can and generate an square wave signal to the cluster.
My skills with arduino are minimum.

Hi
You have a sketch for arduino, I will do it on STM32.
Best regards

Hello
Auto after SWAP Skoda Octavia 1.8T plus DSG.
On the dashboard of the Golf R32 it shows the gear numbers.
On the dashboard  of the Octavia it does not show.
(https://i.postimg.cc/SQTr54gH/ze3gar.jpg)

Hi, I'm looking for some advice. I am trying to install reliable instrument cluster VDO from Audi A6 (4B0920933N) to Audi TT 8N. Almost everything works, but the speedometer shows about 10 km / h less. The pointers are installed correctly. Do anyone know if there is some constant in the EEPROM that could be used to adjust the speed? Thanks

Does it show 10km/h less in all scale or just in higher speeds?

There are some calibration bytes before speedo  map ( 23 1F or something like that ) , but they are covered by checksum so you can't just edit them. Maybe try to copy some parts of a3 8l speedoscale with calibration but from clusters from MY2002 because as your 933N they are crypto.

Thanks for reply, I'll take closer look. In lower speed (city) it is about 5 km/h less. Am I right that I am looking for editing "distance impulse number"?

Which address do you exactly mean by this 23 1F? I found some algorithm to calculate checksum....

my a6 c5 also had almost 10 km/h difference between speed on cluster and GPS - when higher the speed the more difference it showed , its normal

It is normal when speed on cluster is higher then GPS. In my case is cluster speed about 10-15% lower then GPS and it affects board computer and mileage too....

I compared A6 vs S3 cluster EEPROM and I see some differences in 0x0B4 - 0x0C1 (see picture). Is this what you talking about in previos post? Can I just put these bytes from S3 to A6 eeprom, correct checksum on 0x0B0 and upload it to the cluster?

Yes try - I was thinking about that area

A few dash dump in vageepromer and don't red VIN and other?
(https://i.postimg.cc/28hmc38k/vag.png)

Unknown version propably , then read manually from dump with a hex editor. From which cluster is this dump?

EEPROM from Skoda Superb 1.

Vag epprom is not perfect - it also doesnt show this info in some rb4 clusters.

What do you need from that superb epprom? Pin?

Ok thanks I have everything, I needed info why it is not showing.

Ahhh ok :)

I need help  ::)

I have 4B0 920 981J in audi 80 quattro with 2.7 ex biturbo engine.

I tried to calibrate cluster to 80 quattro fuel sender but with no luck.

After few changes in eeprom needle shows right fuel level but VCDS shows only 4liters, 68 Ohm and fuel reserve shows up on cluster with +- 40 liters of fuel in tank.

When empty VCDS says its 280 Ohm, when full 40 Ohm.

Somebody can do needed changes or tell me what to do  :-\



And here is full mesurement done by some guy.


   Fuel
    in
Gallons= Ohms
Empty = 280
1 = 161
2 = 129
3 = 113
4 = 104
5 = 99
6 = 92
7 = 88
8 = 84
9 = 78
10 = 74
11 = 69
12 = 62
13 = 59
14 = 53
15 = 48
16 = 42
17 = 40
17.75(full) = 40

Hi, I can confirm that modification below works great. Thanks for help!

Hi, do anyone have idea where is placed any stuff around ASR/ESP? I have a problem with showing ESP status on A6 C5 VDO cluster with combination ABS/ESP MK20 from TT 8N 2001. Thanks :)

It may be a problem because asr esp in a6 c5 vdo is connected by cables , I guess in TT it goes by can.  Maybe try to adapt channel 60 in cluster to a value from TT cluster

Thanks for reply. Wire to ESP light is on the same place and on both cluster it light up with grounding same pin (blue 32). But in car it does not work and I dont know why :( Adaptation is the same on both clusters...

Hello, I somehow can't do it, would anyone want to change my data set? The speedometer shows an average of 7 KM / H too much. Many thanks in advance.

I wrote an XDF file. I get the vehicle identification number, immobilizer number, coding, adjustment channel displayed correctly. But somehow I don't get any further ..

Original dump

Could some one give a bit help. Has something happened to file during reading dump (corrupted) or is this really like this?

I looked few ori dumps and seems that I'm missing some data (in my dump there's parts which are "55 55")

ps. which would be reliable software to draw dump out via k-line. And what cable is preferred? (freeware or inexpensive one)

what is this device that will skip the immo data when reading

Some old Vag-k+can. I'm was lazy to remove cluster and read with prommer.
So all hints are welcome what to use.

Biggest reason for tinkering cluster is that i'm running quite big injectors (950cc) and would like to adjust fuel consumption to show more realistic readings.
And Of course needle sweep would be nice extra and maybe temp gauge reading bit more accurate.

search on google
vag eeprom programmer
and cable KKL to USB or Com port

All u need is here :

https://mega.nz/file/iq5XBSZT#rx7sXb5z8ML7iTm61n_WYSZLcgDXOOIQSkB6VC8M2Q8

Found solution for my problem. I'm feeling bit stupid right now. Some reason Vag-k+can was skip neg.response mode. With out that it read only few lines. After cluster reset everything worked fine. So if someone else will do same noob mistake. Reset your cluster and try again.  ;D


edit:
Also for info genuine RossTech VCDS cable can be used with VAG eeprom 1.19g (set to dumb mode). But because problematic old laptop I ended using another laptop with vag-k+can 3.6

Hello,dash in my '98 octavia 1.6sr(1u1919034j) reads about 20 km/h lower than before(about 10km/h lower than gps) after upgrading from rod-operated to cable-operated gearbox out of the '03 1.8t.
also,if it's possible i would like to adjust speedometer scale so i can fit background foil out of the 240km/h octavia dash 1u0920811b.
can someone give me some guidelines how to do this,as i have no experience at this field?i have vag eeprom programer v1.19g and vag k+can commander full v2.5
both dumps are in attachment,i can also attach dumps from two mk4 golf clusters(1j0919660x-220km/h out of 1.4 16v and 1j0920820a out of vr5)  if it'll be easier to transfer speedomeret scales in my cluster's eeprom.
thanks in advance!

Anyone? :-\

Transfer a dump over from a 1.8t cluster remember to transfer IMMO DATA over if needed

Dumps aren't same...

AND ? i running Octy cluster in a mk4 with mk4 dump on it..Code the clocks in as normal the re read dump and edit

Checksumme ?????

Checksums aint a really big issue with these clusters

it says eeprom not supported with my 8l0 920 931 E

eeprom attached!

Read with VAGTacho, eeprom programmer v19 not Working (unkown hardware number)
wanted something like needle swap and my kmh is not working correctly (+5KMH gps)

Hi
I recently swapped the exchange to dsg dq250 here in Brazil
and I have the same problem of not showing the current gear
managed to solve?

Reflash with r32 dump or change software coding

VAG EEprom will show you all the data but needs to be decrypted. FIRST SAVE ENCRYPTED  AS BACKUP!! Then set to new mode it will then decrypt all the information and show you vin,immo id, and pin. Note sometimes when changing things checksum will not calculate correctly resulting in deF. on the lcd. ALWAYS MAKE ENCRYPTED BACKUP FIRST! Prosta sprawa.

Hello guys,

Based on what tjwasiak said on post no #21 and some other findings, I have finally figured out how to properly rescale my cluster.

Long story short: I had 1/2 FIS on my octavia mk1 with bad LCD so I decided to swap from Superb 1 with full FIS. After some immo issues i got it right. But I found out that I had speedometer too low - from 0-60 it showed about 5km/h lower, and from 60-end 10km/h lower. On the other side, old octavia cluster was showing a bit too high (5 more 0-80, 10 more 80-end). And we can all agree, that lowered values are far more dangerous than higher values right? :D So I needed to tune it.

So I read my "new" superb cluster again. I copied my speedo scale (tacho was already done) and k-value from old cluster and it resulted as predicted - I had the same, bit higher valueas as old octavia cluster :D But, as an engineer, It wasn't enough for me - as I have learned how to properly modify dump :D.

I took a protractor, measured angles between single 5km/h indicators on both ranges (0-120, 120-240), calculated proper values for speedo stepper motor for specified (my custom) speed values (as tjwasiak said, you have to determine your k-value right in order to have good speed readings), and put it into dump.

As the result, I have only 3km/h higher than GPS on whole 0-240 speed range, which is great because I still have that small "overspeed" error margin, which helps me mentally :D This error can be caused by some k-value uncertainty (resulted from wheel diameter uncertainty), angle measuring error (because photo of speedo was took a bit off proper front angle) and other like dividing reminders in calculations.

My setup is as follows:
Old Octavia cluster (seems type VWK501): 1J0 920 9(xx B) - not sure which it was but I will check and edit.
New, swapped Superb cluster (seems type VWK503): 3U0 920 941 A

In [] brackets I will put addresses in octavia cluster. Remember, I'm giving here my actual, custom values. Addresses from octavia's cluster are just in case someone would want to copy from octavia's cluster. You won't find values I show here in octavia's cluster (except k-value) :).

k-value: 3480 (this value is copied from octavia's cluster), Originally it was 4182 (as far as I remember). Address 0x192 [0x150]

speedo x-axis: 0050 00A0 01E0 0500 0780 07D0 0B40 0F00 (for 3, 10, 30, 80, 120, 125, 180, 240 km/h). From address 0x258 [0x220]

speedo y-axis: 0065 00CA 0260 0655 0980 09C7 0CD8 1030. From 0x268 [0x230]

BUT THERE ARE TWO THINGS YOU NEED TO BE AWARE OF!!!

First. After switch ignition ON, speedo shows 5km/h (even with engine off). This could be (probably) because speedo stepper starts not from 0, but from first value in x-axis. That's why (I guess) original x-axis starts from about 1,5km/h. You know, it will be set about 1 degree up, so it is unnoticable. I will do the same, and set first value of x-axis to 1km/h (and proper first value of y-axix accordingly) and check this out. Nevertheless, all remainding speed readings are ok. Checked with GPS.

Second. Unfortunately, as tjwasiak said, there will be def error on cluster. And that's probably because of checksum error, caused by modyfing k-value. I deduced (correct me if I'm wrong) that speedo (and tacho) scales are not checksum protected. And k-value is. To get rid of def error, you can recode your cluster with the same value, but unfortunately it will force returning your k-value to previous, and that will crash this whole idea, because everything here is based on assumpion that k-value is correct :). And the reason why this will happen, is that cluster coding last digit sets k-value :) You are lucky, if for some reason you can choose from some values during coding (on ovtavia's cluster I was able to choose four as I remember), unfortunately I wasn't on superb's cluster. I am able only to set XXXX5 as my last coding digit, which results in going back to 4182 k-value :(. To fix this properly, you would need to know how checksums are calculated in VDO clusters (probably some kind of CRC) and also where to put it in eeprom. And unfortunately I have no idea for both :(

BUT!!!. If you don't need to change k-value, you are home. I had to change it, because I swapped cluster from different car and beside that, it was diesel, and I have 1.8t :) If your k-value stays the same, I guess there won't be a checksum error and even if it will appear, you can recode with the same coding, because it won't change your k-value :)


Does anyone know how to calculate checksums and where to put them? :)

I know how the checksum works on VDO Audi clusters ( a4 B5 , A6 c5 , A3 8L ) - but it's hard to explain because I dont't know everything. I will try to prepare a dump screen with selected bytes for two types of checksum.

For sure it works different beacause in Audi K value is fixed , and recoding doesn't fix def error.

I am currently looking for a different way to do this. I am wondering how VCDS changes the k-value with Soft-Coding  back to 4182?  For example, if coding is XXXX5 then module could be looking somewhere in its EEPROM for matching value for coding digit 5 which should be 4182. But if my EEPROM is actually modified with 3480 k-value and I havent found any other 4182 value in EEPROM, than how the hell it knows to put 4182 in that specific address?

I am looking for a clue, where this 4182 k-value is stored for VCDS, so I could change it to 3480 so that it will set 3480 instead of 4182 with recoding with XXXX5. This should allow me to recode with my desired k-value and automatically calculate and correct checksums, so that def error would be cleared (or maybe I am wrong, and this is not cheksum that causes def error? any other options for that?)

Any idea where to look? I guess that finding proper CRC algotihm and also finding place to put checksum could be pain.

By the way, I cannot code any other last digit than 5. Even VCDS hint label shows that only option is 5.

Look in flash for the CPU

Do you have any CPU flash file? Or how to read it?

these counters nobody reads processors because they are not needed for anything

I'm trying to find place in EEPROM which is related to ABS/ESP in A6 C5 cluster (4B0920933N). I have to change that part to behave same as on S3... I hope that the CPU flash can help... Or do you have some other hint?

I have some XLS file in computer that can calculate checksum on 0xB0... And I successfully used it in the past...

what difference in behaving?

if you don't want them enough, enter the mass for the output pins

Would you share? :D



What do you mean by that?

By the way I guess (based on your nickname) that you are from Poland and so do I. If I am right, we can talk a little on Facebook :D

Anyway, I tried everything, without luck :( .

I did as follows.
1) took eeprom with desired k-value and speedo scale.
2) loaded it into dash. Of course it caused def.
3) recoded it in VCDS. Def is gone but so is my custom k-value
4) read this recoded eeprom from dash
5) compared it with version that causes def error
6) copied all cells that were different - from "recoded, no error, overwritten undesired k-value" to my "def error, custom desired k-value" eeprom (6 different bytes total). I have only left my desired k-value, everything else is the same as in "no error recoded" eeprom.

I was hoping, that if I copy all these different values, I would copy also checksum and other stuff that is under control test, and I would bypass def error. But no luck.

My observation is that recoding changed not only k-value back to factory. It changed 6 other bytes, but no idea of their functions. These are:
Address: value from def eeprom -> value from "after recoding with no def" eeprom
0x5C: 5EC0 -> C89D
0x14A: 0000 -> 0002
0x190: 0324 -> 030C
0x192: 0D98 -> 1056 (this is k-value, that was returned form my desired 3480 to factory 4182)
0x4BE: 0000 -> 0032
(note that it is 6 bytes difference, despite 5 addresses. First address has both bytes different)

Seems like two options:
1) this dash just won't accept k-value other than factory. And def is not related to checksums, but to the k-value only
2) it is still necessary to recalculate checksum and have it corrected already when writing eeprom. It could be possible, that for example, after reseting ECU (and it is necessary to reset ECU in order to new eeprom work so I can't pass this step) the dash calculates again checksum in order to validate it with this one that is currently in eeprom (but without correcting it). And I don't have this correct checksum present in any time in my custom eeprom with desired k-value (more probable scenario)

Any other ideas? Maybe other fix for def, without recoding necessity?

There is some text that you have to translate to your language (i translated it in the past from russian to czech)...

Its not posible to turn off ESP via button.... I have A6 C5 cluster in Audi TT 8N which is same as S3 8L. The difference is that TT/S3 have ATE ESP unit but A6 C6 have Bosch ESP unit. There is probably some different behavior between them and software in instrument cluster is probably cooperating with ESP unit. I can't figure out where to change that behavior.

maybe the 4D98 will be fine
i have skype if you want

Did you try to use a s3 8l dump?

I would love to, but this is crypto cluster so I think its not possible... Or is?

4b0920933N is also a crypted cluster so... write a s3 dump that is also from a crypto cluster. Maybe there will be def but you will test if the esp behaviour changes.  At any time you can go back to your dump without any problem.

As long you write a dump from a crypto cluster you are safe , if you write a dump from a non- crypto cluster its worse but also it can be repaired.
 
Its easy to know if its a non- crypto cluster - the middle part of dump is ful of FFFFFF.... In crypto there is some data.

Thank you very much! I have spare A6 C5 cluster no crypto... I sucessfuly flashed this cluster with A3 eeprom while ago :) I will try that in car!

I have a crypto a3q cluster laying around. I can read a dump from it if you need.

4D98 would be way too much impulses - 19864. Anyway check your message box. I will contact you on private message.

I have to say that not help :( I tried more eeprom dumps from S3/A3 without success. Behavior of ESP button was same as on A6 eeprom... I tried also recoding ABS unit to S3 but without success too..

Thanks for offer but its not needed :) I found zip where is bunch of (non)crypto dumps from A3/S3...

So its not related to epprom , as you see there something with cluster communication with abs/esp.

Maybe go for vw cluster - they communicate with esp by can. Audi cluster in c5 have  communication by wires

Yes... But I thought A6 and A3 cluster is physically the same and difference is in SW only...

Hi all,

I'm trying to linearise the fuel gauge on my Golf Mk IV cluster with VWK501 software.
Looking at both maps above I can see that they are not linear, I do get the non linearity at the bottom but not at the top. I believe the non lienarity at the tp is the reason for the dash to show "full tank" for quite a while.
Am I'm correct that for a linearisation I need to amend the map at 0x290?

Is it possible to change the boot screen in a 2001 audi a4 vdo cluster?? For instance If I wanted it to read something other than press brake pedal to start vehicle??

Not possible

Hi, I've activated needle sweep in 5N0920872C, this is NEC+24C64, it works nice but only needles are illuminated during sweep, illumination of scales goes on only after sweep, is it possible to activate full backlight during sweep too?

its is possible but need a full read of MMU not just the simple data read and then decompile it but the time it takes is pointless 

Have same issue here. Used 1J0920846GX dump, but gear number doesn't appear. Is there any software coding to apply in this case or there's no chance to show it?

Can anyone tell me if it's possible to modify a crypto C5 Allroad EEPROM?  Or will the cluster only accept variations of factory calibrations?  To give some backstory, I'm installing a 02X transmission in my Allroad (behind a BHW diesel engine), and since the 02X has no speed sensor, I was thinking of mounting a hall-effect sensor to read the dips in one of the axle cups as it rotates.  This would be very simple to setup, but only give me 6 pulses/rev, which is lower than what the cluster expects (about 8).

Based on info in this thread, I've found where the K-value setting is located in the EEPROM, and I've figured out how to use that spreadsheet posted earlier to update the checksum.  If I modify the EEPROM and flash it, will that be enough to get my speedo reading accurately with that kind of VSS setup?  Or will I also need to find an early non-crypto Allroad cluster to make everything work?

Use vss output from abs module. Google it.

but only possible on the facelift abs units

I don't think the ABS module in my car has the necessary output; I have already researched this extensively.  I know that some C5s did come with the 5.3? units that have the output (same hardware as far as I can tell as the B6 A4), but as far as I can tell, fitting that unit would be a lot of modifications; brake booster, master cylinder, front brake lines, and wiring are all different from my Allroad (compared to an '04 C5 in the local junkyard with the newer ABS).  The newer system has the control module mounted directly on the pump, while my Allroad has the control module inside the car, so the wiring wouldn't be a simple re-pin either as far as I can tell.  Do you have any knowledge of the VSS output pin on the older units?  I haven't been able to find anything documented, even looking at the navigation system wiring diagrams as well.

Well just as an update, I set-up a bench harness and successfully figured out how to change mileage, k-value, update speedo checksum, etc.  Haven't tested the modified k-values in the car yet, but the cluster accepted the flash and doesn't show any errors when powered up.  I wrote an .xdf that's a bit more thorough than the existing ones on here; I'll post it after I work on it a bit more.

Some more info based on testing.  I tested some modified k-values in the car, and it did indeed change the speed displayed on the speedometer, and the speed displayed by certain modules that get their speed signal from the cluster's speedo output pins (like Central Locking and Park Assist).  The ECU-displayed speed is still as stock, as I assume it has its own tables to determine vehicle speed.  Level control also displays the ECU speed; I'm guessing it's picking that up from the Powertrain CAN bus since it's connected to that.

However, I have some questions regarding how the k-values are stored in the binary and how they function (there's 6 as far as I can tell).
The k-values seem to be in a 3x2 table starting at 0xB5.  Numbers in the left column are close but not the same as those in the right column in all the cluster binaries I've looked at.  In most binaries, the rows are identical, but in the 2 clusters I have personally (03 Allroad ad 04 A6), the 3rd row has different (lower) numbers than the other 2.  I'm assuming this is because both of these clusters can be coded for an Allroad, which has a larger tire size.  When I modified the k-values, I scaled them all down to about 75%, which had the expected effect of the speedometer reading higher than actual speed.  Anyone have any idea why the two columns are always close but not the same?  Could this have to do with how the speedometer outputs a speed signal to other modules in the car?

Just trying to get an idea of how everything works so I can set it up properly for my car.

So based on some testing, the k-values do seem to work as a 2x3 table

First column does not have an effect on the speedo reading - my guess is that this adjusts the output pulses to the two speedo output pins
Second column seems to change the pulse count used by the speedometer
1st row appears to be active when Allroad is not specified in the coding
2nd row doesn't seem to do anything so far with a C5 cluster
3rd row appears to be selected by adding '4' to the coding (specifies Allroad)

Hello!

I need help with my panel, I have a bora that had panel code 1J5920806J VDO on MFA immo3. and bought a passat b5.5 panel 3B0920829 VDO with MFA immo3. today I already configured it and the car turns on and the ABS light no longer turns on. but The speedometer also shows 10 to 15 km/h less, is there any modification in the eeprom that I can adjust this difference? I am attaching the pictures and the eeprom.

Start with a Mk4 Bora/Golf panel binary where the ROM ID matches the one from the original Passat panel ID, then transfer your immo data/odo/vin etc to that.

I solved the problem using dumpdash edit, with it I checked the option of 80km when I'm at 100 in the GPS and generated the new eeprom.

so the panel now marks the exact speed of the GPS.

Your odometer will still be off if you used this method to correct the speedometer.

it didn't stay... but it marks less km, as it is possible to change it in the future I will correct the error.
every 33 km, for example, the odometer marks 5 km less, I have already done this calculation.

in Brazil there is no one who is able to correct this, I sent it to a person from Ohio but his correction did not work.. at 100km/h the panel marked 85km/h, unfortunately.

The binary I'm attaching should be the correct one for using this Passat cluster in a Mk4 Jetta/Golf/Bora.  I transferred the key/immobolizer data from the binary file you posted earlier.  The speedo may still be about 5km off at 100km/hr just like the stock ones.  You can correct that with DashDumpEdit if you want.

You needed to start with a Mk4 binary that uses the VKK503MH software version with MFA screen.

Blairdude, thanks for the help!  If I get it tomorrow, I'll upload this file to test it... if it's 5km/h less, it's perfect!  what I don't want is to be upside down... I don't need to do anything, right, just upload the file as vageeprom?  thank you again!

Correct, let me know if there's issues with that binary.

It didn't change... it already at 40km/h on the panel shows 42Km/h on the GPS.
and it gets worse as the speed increases.

Hi,
Im installing a Passat b5 cluster (3b0919861j) in a VW T4 1996. Almost everything is working allready, for Tahometer used an arduino to divide the impulses from the alternator, temp works ok, fuel gauge works after correcting dash eeprom. The problem is in the speedometer, it shows about 25% less than actualy going, after corecting the K-value from 4182 to 3345 works perfect, but, now i have Def message. Tried to code again with diagnostic tool, tried manually in eeprom, tried calc for odometer(i thought they calc cks). Nothing works. Maybe some one know any solution?
With ne k value atached(0x092-0x099).

Let me know if this works.  I included a rudimentary XDF I've been working on and a DLL file I made to automatically calculate the checksum when the file is saved (DLL goes in the TunerPro Plugins folder).  Keep in mind that I don't have any of these clusters to test with.

Thank you. But still def. Tried editing a non def file in TunerPro with your DLL, same. I noticed that my original CS is "E0" but if i save my file without changes it goes for "AC". Maybe there is a way to do something with the calculation algorithm?

There must be something up with the algorithm then. Can you send me the original unedited file for me to test with?

Here is the stock file attached

So, i managed out. Take string from 0x91 to 0xB9, add +1 to last digit and used this calculator - http://easyonlineconverter.com/converters/checksum_converter.html
For example my last file with new K-value and no def attached

Here is how the VWK501 and VWK503 checksums are calculated: https://github.com/gmenounos/vwcluster/blob/main/Checksums.md

Hello, I wanted to have real coolant temp gauge on this S3 8p redesign cluster which I will retrofit in A3 2009 redesign. Problem is my colleague can't find charts for that gauge so if anyone could help I will appreciate it. I'm willing to send eeprom file to someone who can load these charts in eeprom or to just help me edit eeprom. Cluster is 8P0 920 932P