MEGANE III CONTINENTAL VIRGIN / VIN CHANGE/ CHECKSUM

[GolfmkI]

Hello ,hope someone could give me an idea

I have Megane III Continental tipical ISSUE.

Internal error, caused by a weak battery.

I have solved many times with a file that is working, but it belongs to other car...

So VIN is not ok, it cannot be change with CLIP, only the first its possible!!

I mod Manually VIN but I obtain INTERNAL ERROR

I can use donor file and system works ok, SAVE IT, it can solve problem in this ecu, it is not PASS PROTECTED.
But I dont think its a good idea let the Vin from donor vehicle...even more in case of crash. You KNow what I mean...

So anyone Knows how it can be changed VIN number???

Or how we can correct checksum in this 95640?? Any particular ALGO??

Or only perfect solution is to use 100% virgin file??



MEGANE 3 CONTINENTAL
285581365R 22


00.0405-291a.6
51/2009
HW 44/07
PS-37
V 3.7
SEW9M18AJ7L

[dragon100]

Use this with your vin.

[GolfmkI]

THanks but as I said above (you can read again)

If I change manually VIN in eeprom( This what you did) , it appears internal error.!!

Checksum??

Tried for the first time like you BUT IT IS NOT WORKING

AT LEAST IN THIS PARTICULAR DUMP

But thanks anyway

[dragon100]

Then use can clip and change vin.

[GolfmkI]

IN fact, the common problem in this modules is when battery is weak, some bit could ba changed accidentally when ignition ON/OFF...

If Ecu dont correct such change (correct checksum), you will have Internal error.

Many Ecus works in this way, this is WHY I search a VIRGIN 100% FILE to recode it with CLIP.

This is the same as buying original NEW ecu.

[dragon100]

Sorry my mistake....

[dragon100]

Did you try this : http://www.digital-kaos.co.uk/forums/showthread.php/312962-Megane3-Continental-285581365r

[GolfmkI]

Then use can clip and change vin.

As I said in ORIGINAL THREAD VIN cannot be change with CLIP.

It only allows you to change when Ecu is virgin ( NO VIN STORED).

CLIP says exactly what I say....

VIN only could be changed /stored for the first time.

For the first time VIN IS

?????????????????

OR

FFFFFFFFFFFFFF

Ive tried on eeprom both ways ( BF BF BF BF etc... or FF FF FF FF etc...)

But again I receive in Ecu Internal error ( checksum error)

I am almost sure that CHECKSUM in this Ecu is stored in line 1FC0 on last digits...simply by comparing many , many dumps...

But I have not the trick/ algo to recalc checksum...so no JOY.

[GolfmkI]

Did you try this : http://www.digital-kaos.co.uk/forums/showthread.php/312962-Megane3-Continental-285581365r

Yes i tried.

It is password protected, but contacted member and gladly sent me ( Thanks rocodou)

But problem is file is not really VIRGIN!!! Message says is virgin but its not Virgin.

It is simply a working file, but not VIRGIN, already coded and VIN SET.

Tested a couple an hours ago

[juancho18]

I see you have a serious problem.....
If your module is a virgin, programmer in line online scanner original .
If you have the pastruck online It also can

I recommend you take the dealer
Not from CRC
It's flash online.....

[GolfmkI]

I see you have a serious problem.....
If your module is a virgin, programmer in line online scanner original .
If you have the pastruck online It also can

I recommend you take the dealer

Not such serius problem ;)

I can simply use the file with DONOR vin, everything else is working.

I am sure there are many Ecus from this series working in this way.

Ecu is reprogrammed in dealer many times( I have really good relation with Renault).

But you KNow What???

It only updates FLASH!!!

So eeprom stays original..... ;)

If REPROGRAMM WITH CLIP solve INTERNAL ERROR, I will not open Ecu anymore( should remove plastic cap , it has no screws)

BUt thanks anyway.

Solution is VERY SIMPLE: VIRGIN FILE.

But to be honest, with this so difficult to open ecu, I am thinking this is almost impossible.

Who will buy a new one ecu, and before programm it open (lost warraty) and read.???

;)