Question: What is the best way of preventing the risk of CAS3++ Istap failure when programming key via OBD only?
Using xhorse vvdi2 only.
Suggestion from whom have done many VVDI2 CAS3++:
1) Continuous 13 volts with a voltage stabilizer.
2) Voltage it’s one thing you need to consider.
3) Voltage… I done lots off them no problems
4) The voltage drop can be the reason it fails.
5) Voltage is the biggest thing. Best way to do it is on the bench to be safe.
6) The best way to prevent an issue with the downgrade is to not do it via OBD. Or pull the CAS out and read/save the eeprom prior…. It takes 5-10 minutes to do with some practice. Read CAS with programmer .. make key .. put all back ..job done ..
So if you need to do with VVDI2 via OBD. Go and get a battery stabilizer. It will work.
The best way is to backup eeprom and write key on bench.
Related post:
Xhorse VVDI2 Adds BMW X1 CAS3++ Smart Remote Key by OBD
How to use VVDI2 to get BMW CAS3+ ISN for All Keys Lost