Use a Foxwell FCA 12+8 Adapter can bypass the SGM/SGW isolation to do diagnosis or key programming for Chrysler/ Fiat 2018 or later.
How to use a Chrysler/Fiat FCA 12+8 Adapter?
Step1. Find out the security gateway module, it is generally located at the bottom of dashboard;
Step2. Remove the security gateway module plug;
Step3. Plug the Chrysler/Fiat 12+8 dedicated diagnostic adapter;
Step4. Connect with the VCI Bluetooth Box;
Step5. Turn the ignition switch on, now you can start to diagnose.