OBD Tools 365 Days Shop
Welcome to OBD365 Sign In or Register
Home - Products - Technical Support - Which tool to read and write Audi A4 eeprom HC12

Which tool to read and write Audi A4 eeprom HC12



copy the immo information from a cluster to another
make the mileage follow with the immo information

If clone all eeprom content than the mileage is transferred too.




Audi a4 2001


Optional devices:

Digiprog3, or ecu programmers like XprogCarprogUPA USB programmer


Original cluster:

The Jaeger cluster barely works





read the pin code from both the Instrument and adapt it to the vehicle


What to do on pin 21 and 22 on the chip:


– With car ECU programmers:

Eprom.set type,mcu,hc12,read,save.
eprom,set type,mcu,hc12,file,load,write.
Buy yourself Xprog-M programmer, Carprog full, UPA USB.
Pin 21 and 22 jumper after programming or wait 10 minutes.


– with Digiprog 3:


Eprom,set type,mcu,hc12,read,save.
eprom,set type,mcu,hc12,file,load,write.



Eeprom HC12 read and write to the other counter:



(Write down the exact ALWAYS old / incorrect Mileage)

The diagnostic port is in the driver’s footwell. Turn the ignition

on a vehicle. Connect plug ST16 the diagnostic port and the



Select the program: cars / trucks – AUDI – MM 4 / 99- DIAG.

The DIGI PROG II shows you the old / incorrect Mileage.

Enter the new / correct Mileage and confirm this.

Should be then after programming on the speedometer 999999 KM give

The old / wrong KM value again so that the speedometer again the old /

false indicates KM. Now you build the speedometer and break it to the

see board. Solder the green and black wire to the same color marked

Arrows at. Now connect the blue and the green plug with

the speedometer and plug ST41 with the DIGI PROG (picture on the following page.)

Now select the program: cars / trucks – AUDI – MM 4/99 HC12.

The DIGI PROG shows you the old / incorrect Mileage. Enter the

new / correct Mileage and confirm this with the hook.

Now shows you the DigiProg II 5 min wait. Remove the connection

between the DigiProg and the speedometer, wait 5 minutes and build the speedometer

again. Alternatively, for 5 min. Wait, you can also like in the image on the

next page shows the pins 21 and 22 bridges.


Here necessarily the board from any power supply (Digiprog3 v4.94,

external power supply, etc.), Pin 21 + 22 bridge, and then you can use the tachometer

Immediately reinstall.


Write a Review
* Rating:
    Please select rating stars.
* Your First & Last Name:
* Your E-Mail Address:
* Review Detail:
*Verification Code:
          No right? Get a new Verification Code
Tell us what you think about this item and share your opinions with other people. Please make sure your review focuses only on this item. All reviews are moderated and will be reviewed within two business days. Inappropriate reviews will not be posted.
After-sales questions and issues: Contact our Customer Service Department. (A customer representative will get back to you).
Please Sign In first if you want to later edit or manage reviews uploaded by yourself.
Bookmark It
Join our community: OBD365 Official Blog OBD365 Twitter OBD365 Facebook OBD365 Youtube OBD365 Google Plus OBD365 Subscribe