The Data Cable LED indicates that there is sufficient 12V power and ground being supplied to the Data Cable. If the LED is off when connected to the vehicle:
The fuse in the Data Cable may need to be replaced.
There may be insufficient B+ voltage and/or ground at the vehicle OBD data link connector. On OBD-I applications, connect the 12V Power Cable into the OBD-I adapter if required (see Connecting to OBD-I vehicles).
There is possibly a damaged cable or an unresponsive vehicle.
No. The USB micro cable is designed to work with the lid to capture the connector and provide strain relief. Other cables may connect but will not provide proper strain relief.
The S3 Scan Module needs to be conncted via USB cable to the Display Device during the synchronization procedure. Make sure the Display Device has a charged battery and is connected to an AC power supply.
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