How to OBD unlock Simos PCR 2.1 with Kess V2 china clone

Possible to OBD unlock Simos PCR 2.1 with Kess V2 clone?

Look here: all information can be found here to help you unlock PCR 2.1 using Kess v2 china clone.

 

Connection:

 

ECU connection for the bootmode unlocking procedure only!

 

  1. Connect the ECU to the bootloader adapter
  2. Power up the bootloader adapter with a stabilized 12v power supply
  3. Connect the cable 14P600KT02 to the 14P600BTLR adapter
  4. Follow the instructions provided below

 

Wiring diagram:

  1. Solder a wire to the CNF1 pin
  2. Solder the 470 Ohm resistor on the two pads
  3. Solder the 1K resister on the pad

 kess-v2-unlock-PCR2.1-wiring-1 kess-v2-unlock-PCR2.1-wiring-2

Test:

Basic info:

Tested and confirmed working by me on 4 ecus /cars

only on Chinese clone not reworked unit: ktag 6.070kess v2 v4.036, ksuite up to 2.15

kess-v2-unlock-PCR2.1-wiring-1

kess-v2-unlock-PCR2.1-wiring-2

Tips and guides of tools for use:

pcr 2.1 need to be as you know unlocked before writing .

On this ecu pcr 2.1, ksuite (kess v2 or ktag) seem to be more stable than fgtech on pcr but work too sometimes: i get error with fgtech on one pcr2.1 but no problem with ksuite . 

 

So if you have both tools , prefer ksuite seem to be more stable & flawlessly and car run ok .

After you get you ecu unlocked in boot mode , with fgtech just remove boot and left pin connection , and read or write on bench .

On ksuite tools , you can’t read or write with ktag , only unlock . (alientech need to work on it…)
with kess it’s ok , BUT , you can’t use the tricore module !

The problem is that the harness is plugged in the tricore module . so you have to build your own bench cable : just get a obd female plug on a scrapyard , and wire +12 gnd and can h/l (kline is not used but you can wire it it will make a universal bench cable) .

The trick to get communication error free on both fgtech and kess cable is to use a strong external psu .

when the tool id or read or write the ecu , the ecu will perform a kind of reset , and the big cap inside the ecu will go charging , causing a drop in voltage if your psu isn’t strong enough to handle it . THAT WILL CAUSE THE COMM ERROR . That’s the only thing you have to take care . 

when i made test with many little psu (like one you get with your tools) i have seen 7 volts drop some time , so the ecu is shutting down and no comm . 

you can use computer atx psu modded to work on bench (green wire plugged on ground to power on ) i think anything that can provide +12v 2A will be ok . i didn’t need more than 12v just a stable 12V . 14v unstable will not be ok 

that’s why on the car you have no problem , car battery can handle the cap charging current .

There is no immo caused comm error on this ecu , psu is the problem !!

So in conclusion : good psu and obd home made bench cable , remove tricore module on kess = 100% tested bench flashing solution for pcr2.1 .

 

Share