I see a “Communication Error” message on the SDS50 screen. What does this mean?

When the tablet shows "Communication Error", it means the tablet failed to establish communication with the vehicle. 
Please follow these steps to troubleshoot the issue: 
1. Check if the tablet DLC cable is securely plugged into the vehicle’s DLC port. 
2. Turn the ignition off, then turn it on again after 10 seconds. DO NOT start the engine and then retry the operation. 
3. Check if the vehicle’s control module is defective

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