One customer fixed his old used air conditioning module on this Mercedes- Benz S-Class W222 2018 (also fits 2016/2017), but it cannot work normally. The possible cause is that the unit needs to be coded or programmed. CGDI CG100 Programmer can program it by Bench successfully.
The solution:
1.Remove the A/C control unit.
There is a Renesas processor chip (R7F7010064) on the old PCB of the air conditioning module.
Go to read the data and write it in to a new A/C control unit.
2.Run CG100X software
Select Programmer>> Renesas>> RH850>> R7F701064
3.Check wiring diagram (144 pins)
4.Use the Pro V2 Adapter to connect CG100X and A/C module according to the diagram
5.Read ID
Read every data, D-flash, P-flash, OPBT0 and Boot data.
Read D-flash
The P-flash is very big, and it will take a little bit time.
Read OPBT0 data
Read BOOT data
Save all data after reading
6.Unplug this, remove the wires
Use the same wiring diagram to connect CGDI CG100X and a new A/C module via Pro V2 adapter
Write all the original data to the new module
After the writing is successful, unplug this and reinstall air conditioning module back to vehicle.
Then the air conditioner goes well.
