Technical Temperature needle moves up and down with the engine started but not moving.

[diego74]

Milleage is stored in eeprom (95040), that is why I suggested that, take a look:

 

[diego74]

Thanks for your opinion.
I'll search for a workshop for repairing the dashboard.

Most likely they will do what I suggested.

 

[diego74]

You can read 95040 eeproms with the cheap CH314A programmer and its test clip, no need to desolder.

You can also mimic the coolant temp sensor with a sensor emulator, which basically is a potentiometer connected to earth.

 

[MKUser]

Most likely they will do what I suggested.t

Thanks a lot...
I have watched some tutorials about the use of the CH314A and it seems a little tricky.
If you don't do it well , you take the risk of damage your eeprom and the problem can get bigger.
I'll need a specific procedure guide to operate minimazing risks.
I 'm not sure I can do it well.
A second hand dashboard is not very expensive but , if I damage mine, then the problem can get bigger.

 

[diego74]

No risk at all, you read the new one's eeprom, then you read yours, then you write your data into eeprom of the new dash, if you made a mistake you just broke the new one, I have dumps to send yo you to revoer it. Yours remains intact as you just read it.

 

[diego74]

CH341 is super easy to use, this is how the read looks like:

It should contain data until that line, the rest is all FF which means empty spaces.

 

[diego74]

1) Abrir programa
2) Click en el botón con el signo de interrogación verde, asegurarse que detecte el chip (muestra un listado, seleccionar M95040, si no lo detecta no está bien conectado)
3) Click en el botón con la flecha verde (Leer)
4) Guardar el archivo en la PC con el botón del diskette.

Then change eeprom and write the saved file with the icon with the blue arrow, you can verify the written data with the green equal sign button.

 

[MKUser]

1) Abrir programa
2) Click en el botón con el signo de interrogación verde, asegurarse que detecte el chip (muestra un listado, seleccionar M95040, si no lo detecta no está bien conectado)
3) Click en el botón con la flecha verde (Leer)
4) Guardar el archivo en la PC con el botón del diskette.

Then change eeprom and write the saved file with the icon with the blue arrow, you can verify the written data with the green equal sign button.

View attachment 472139

Thanks for the info...
It would be interesting knowing how to find the eeprom on the dashboard and how to connect .
Resuming: reading and cloning the eeproms with the CH341A and use the Tachosoft calculator for the mileage.
I'm not sure if I understood how to pass the mileage from an epprom to the other.
It',s important for the ITV( inspección técnica de vehículos).
Gracias, compadre...

 

[diego74]

Milleage is stored in the eeprom data, you transfer the data and the milleage will be reflected.

Eeprom is located near the processor which is usually the biggest chip. Eeprom should say 95040.

 

[diego74]

 

[MKUser]

View attachment 472184

Thanks a lot...To connect to the CH341A here, you use the clamp wich comes with the kit?
How you do it?
Thanks

 

[diego74]

Thanks a lot...To connect to the CH341A here, you use the clamp wich comes with the kit?
How you do it?
Thanks

Yes, pin1 of the eeprom (leg below the ST logo) matching with the red stripe of the clamp.

 

[diego74]

This is the data path from eeprom to programmer, taking into account the eeprom's pin # 1 -> pin1 of the clamp (red stripe) -> pin 1 of the small board, and the small board pin #1 connected to that specifict point in the programmer.

I connected it wrongly in other boards and nothing happened, you will notice it is connected properly with the instructions I wrote in previous post above in spanish, when you click the green question mark button.

 

[MKUser]

Yes, pin1 of the eeprom (leg below the ST logo) matching with the red stripe of the clamp.

Ok ..I bought the dashboard and the CH341A and I'll try.
Thanks for the indications.