2017 Yamaha MT10 SP Speedo - Finding the 93C86 to program odometer

**Voz** · 12th January, 2024, 01:15 AM

Hi people, noob here, first post, trying to get into EEPROM programming to change klm on the ODO of my 2017 Yamaha MT10 SP.

2017-Yamaha-MT-10SP-0773.jpg

The chips on this board have a protective coating over them so I can not read the chips, does it look like this is the 93C86 chip?

Screenshot 2024-01-12 at 10.56.25 am.jpg

There is another board that has 2 x SOIC 8 chips but I am not sure they are what I am looking for?

Screenshot 2024-01-12 at 11.09.01 am.jpg

I have ordered a basic EEPROM reader with a SOIC 8 jumper cable and adaptors to put the unsoldered chip into so will need to figure out some software to run that, ideally MACOS.

Is there a change that the 93C86 can be read in place on the board without having to unsolder or is that not possible?

Thanks in advance

Voz

**perukeyservice** · 12th January, 2024, 01:34 AM

clean protective layer, or the unsolder c66 or 86 is read and published

**Voz** · 12th January, 2024, 01:43 AM

Thanks for your reply, I will try to clean the layer. Does it look like the 93C86 chip is the one circled in the 2nd picture?

**Voz** · 12th January, 2024, 02:36 AM

I have removed the protective layer of the chips, this is what is under the Red circle chip:

IMG_8384.jpg

There is a smaller SOIC8 package on the right wide of the ECU:

Screenshot 2024-01-12 at 12.27.03 pm.jpg

Chip is called RH862MM (I can not upload and more pics to this post.)

On another board on the speedo there are 2 x SOIC8 chips.

Screenshot 2024-01-12 at 12.33.52 pm.jpg

**Voz** · 12th January, 2024, 02:37 AM

This is the second chip on the other board.

Screenshot 2024-01-12 at 12.34.20 pm.jpg

**Otonamdinh** · 12th January, 2024, 03:23 AM

I think it's this chip(93cxxx), and next to it are the solder pins, you can read the chip's data on the circuit.

**Voz** · 12th January, 2024, 04:15 AM

Oh wow, thanks. That chip is marked as RH862MM, does that sound right? I do not have a hex reader yet but when I do I presume I have to tell it which chip I am reading?

Screenshot 2024-01-12 at 12.54.01 pm.jpg

Screenshot 2024-01-12 at 2.15.52 pm.jpg

**Otonamdinh** · 12th January, 2024, 04:36 AM

RH86 => 93c86

**Voz** · 13th January, 2024, 04:51 AM

Thats great info thanks fr the confirmation.

So I should be able to solder wires to those pads, power the speedo up and read the ODO HEX values from the 93c86 chip?

Can i then reprogram new HEX values into that chip or will I need to unsolder it to reprogram it?