FAQs Brief Specs Question What should I do if a communication error occurs? Features Answer Follow the steps below to identify the problem: 1) Check if the ignition is ON. Repair Information 2) Check if the TopScan Pro is securely plugged into the vehicle’s OBD-II port. 3) Turn the ignition off. Then, turn it on after 10 seconds and continue the operation. 4) Check if the vehicle’s control module is defective. What's In The Box? Comparison FAQs