[guerragt5]

Hi guys, I have an old interface with rev. C and I want to downgrade from a rev.B. I have several files MB90F546GS, pic16F684 and W25Q80..all are Rev.C . Could someone tell me how to get rev.B? Cheers¡¡ 

[LBDT]

All i know is

Diagbox V7.57 => Lexia 3 firmware 4.3.2
Diagbox v7.83 => Lexia 3 firmware 4.3.4
Diagbox v7.855 => Lexia 3 firmware 4.3.5

what are you trying to do? I have all those fw

[guerragt5]

I want to reprogram the microporcesador mcu and the eeprom with a version a or b, my hardware is old (it does not have all the optocouplers, diodes ...).
By mistake the board updated it to c without saving the mcu and eeprom data. from what I read it is necessary to reflash with the previous version A or B. Thanks¡¡

[mattydr67]

I really don't understand why you wanna do this.
Just because your tool hasn't all optocouplers?
Just for you to understand better. Chinese because they wanna earn more or because they haven't on stock some optocouolers changed the schematic and added components to replace the optocouplers.( echivalent function )
But the hardware is the same and the functions are pretty much the same.
I had in the past a tool as you have and I reworked added the optocouplers and belive me in all I tested I never saw a different.
After a lot o years I really don't understand the difference between Rev B and Rev C but all I know is that the serial that its let you use newer versions of Diagbox after v5.29
Good luck

[guerragt5]

Hi mattydr67, I also do not understand why it does not work well. but I see that since it was updated to C only connects to a ECU and if you want to connect to another next I have to disconnect the cable. I have read that other people have passed and that the revision c should not be installed on computers with the hardware not updated .. this week I will try reflash with another version C to see if it changes the operation. Thank you

[mattydr67]

Try to use the correct firmware for the Diagbox version that you are using
The version shared here in the forum has the automatic firmware upgrade disabled.
So you have to do this job by PSA Interface Chercker
Good luck

[guerragt5]

I used the lexia (not diagbox) with v. 4.2.2. I only use it with ancient cars that's why i did not use the diagbox. I keep you informed if I solve it. Thank you for your comments

[mattydr67]

I am not sure if there is a problems in ancient cars if you are using Diagbox. Because this software including Lexia and PP2000 but I hadn't any oportunity to test old cars and in the past when I used Lexia and PP2000 old platform.
So I cannot say anything else more.
I also have my tool Rev C reworked with all chips. The old car that I tested using Diagbox was 206
Now I am using Diagbox v9.23 and I didn't tested any older/ancient cars.
But if you have fw 4.2.2 is ok for Lexia/PP2000 versions.
Good luck