How-to: IKE mileage programming using CH341 USB device

LZ0 · 7th July 2022, 12:21

IKE mileage programming using CH341 USB device

I want to report a successful IKE mileage change using a cheap CH341 USB device. The procedure could be useful in case of VIN mismatch or to fix the famous 999999 odometer error.

I hope it's useful for someone. Probably the Admin can move the topic to the How-to section.

Тo be used at your own risk!

In my case the original IKE died and I decided to move the original chip to a donor IKE. This caused the 999999 odometer error once powered up the cluster. There was no success trying to repair the corrupt memory area with BMW Scanner 1.4 while the cluster in the car. It can read, but cannot write to ODO and VIN areas. However, it could be useful to dump the EEPROM as a backup before attempting any modifications, such as de-soldering the chip.

In order to modify the mileage, you need to strip down the cluster and gain access to the chip. The chip then can be clipped to the programmer without de-soldering. It's best, however to de-solder and then do the reprogramming.

The memory chip being used in our 75s is 93S56. It could probably be replaced with 93C56, but I cannot confirm that.

Here a sketch of the wiring that I used. Note the bridge between pins 5&7(GND) and 6&8(+5V) in order to be able to write.

Chip location and breadboard wiring to programmer.

Once the hardware is hooked up, CH341 driver and AsProgrammer software installed, the chip can be read. I used Tachosoft program to calculate the car's mileage (km) in HEX and enter the respective values in AsProgrammer. However, what I found out is that setting 00 to addresses from 0x040 to 0x04B doesn't make the mileage zero. I'm not sure if setting FF to addresses 0x084 to 0x087 and address 0x089 will clean the VIN number.

Azur · 7th July 2022, 19:57

Now that for sure asked for cleverness figuring out what to do, thanks for sharing.

Rev Jules · 8th July 2022, 07:34

Dont suppose you know howto wire a three pin plug. LOL!

Rev.

7th July 2022, 12:21	#1
LZ0 Regular poster Rover 75 Tourer CDTI Auto 2003, Rover 75 CDTI Facelift, Rover 416Si K-series 1995 Join Date: Jun 2011 Location: Sofia, Bulgaria Posts: 35 Thanks: 17 Thanked 14 Times in 9 Posts	How-to: IKE mileage programming using CH341 USB device IKE mileage programming using CH341 USB device I want to report a successful IKE mileage change using a cheap CH341 USB device. The procedure could be useful in case of VIN mismatch or to fix the famous 999999 odometer error. I hope it's useful for someone. Probably the Admin can move the topic to the How-to section. Тo be used at your own risk! In my case the original IKE died and I decided to move the original chip to a donor IKE. This caused the 999999 odometer error once powered up the cluster. There was no success trying to repair the corrupt memory area with BMW Scanner 1.4 while the cluster in the car. It can read, but cannot write to ODO and VIN areas. However, it could be useful to dump the EEPROM as a backup before attempting any modifications, such as de-soldering the chip. In order to modify the mileage, you need to strip down the cluster and gain access to the chip. The chip then can be clipped to the programmer without de-soldering. It's best, however to de-solder and then do the reprogramming. The memory chip being used in our 75s is 93S56. It could probably be replaced with 93C56, but I cannot confirm that. Here a sketch of the wiring that I used. Note the bridge between pins 5&7(GND) and 6&8(+5V) in order to be able to write. Chip location and breadboard wiring to programmer. Once the hardware is hooked up, CH341 driver and AsProgrammer software installed, the chip can be read. I used Tachosoft program to calculate the car's mileage (km) in HEX and enter the respective values in AsProgrammer. However, what I found out is that setting 00 to addresses from 0x040 to 0x04B doesn't make the mileage zero. I'm not sure if setting FF to addresses 0x084 to 0x087 and address 0x089 will clean the VIN number.

7th July 2022, 19:57	#2
Azur Loves to post Rover 75 Saloon. 2,5 V6 Conn.SE auto, Moonstone green, White gold, Dorchester red Join Date: Mar 2018 Location: Hollandscheveld Posts: 479 Thanks: 684 Thanked 280 Times in 117 Posts	Now that for sure asked for cleverness figuring out what to do, thanks for sharing. __________________

8th July 2022, 07:34	#3
Rev Jules This is my second home Rover 75 Tourer+ Join Date: Mar 2011 Location: Radcliffe on Trent Posts: 10,709 Thanks: 7,308 Thanked 3,929 Times in 2,051 Posts	Dont suppose you know howto wire a three pin plug. LOL! Rev.