SEMEURBAK

Here are some customer solutions of Can Clip Renault firmware update stops at 20%, some solved by files rename and some by CLIP pcb reword.

For those who have a Chinese Can clip that remain stuck at 20% on the update of the firmware here is the procedure to stop the worries and can again use the Clip device.

Must rename the following files:

C: CLIP DATA APPLI PARAMS appliiso.s19 in appliiso.bak

C: CLIP DATA APPLI PARAMS applican.s19 in applican.bak

tested by myself work 100%

if firmware update stops at 20% the solution is very easy

Exist some problems in hardware ... ISO pcb or CAN pcb

For bypass that error search for 2 files APLIISO.S19 and APLIICAN.S19 and rename this files to .bak one time ISO ...start the soft and ceck .... and one time CAN and restrt the soft and ceck...and you see where is the problem CAN hardware or ISO hardware....

The files is located here :
C:ASDEMODULES
C:CLIPDATAAPPLIPARAMS

If you have renamed the right file no more firmware stop at 20% but the problem on hardware remain and is possible use the interface only for ISO or only for CAN vehicles.....or put the interface in trash !!!!

BUT, some say the exactly reasons for 20% update problem is not the software problem!It’s HARDWARE problem with your clone CLIP sonde. You probably have bad flash chip or bad soldering, or bad oscillator, or, ... you name it, but anyway as I said its pure hardware problem. You can avoid firmware update for ISO or CAN board with renaming few files, but that is not solution because if you cant update firmware, your CLIP will not work properly. 

Besides two pcbs inside Clip (can and iso) there is small thrid pcb where is round connector for car cable . When this cable is plugged and unplugged to Clip very often ( which needs a little force ), then solderings on metal pins which links this small pcb with rest of clip are breaking with the time.
You just need to resolder connections of these pins.

I did it and it solve update 20% problem

How to repair Renault CAN CLiP hardware -flash ISO & CAN BDM chip:

http://obd2francais.blogspot.com/2016/08/how-to-repair-renault-can-clip-hardware.html

What is a CLIP with good PCBs:

Source: http://www.diyobd2.fr/wholesale/renault-can-clip-diagnostic-interface.html