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Q:what is this device used for , plugged into vehicle where, ....reason for purchase ??????
A:I'd be happy to help you with that! It is a chip that allows certain OTC scan tools access different systems in the vehicle's computer system. You have to plug in the correct 'key' for the scan tool depending what the vehicle application is. You would plug it into the actual scan tool; it does not plug into the vehicle.
Q:What is this thing?
A:It's a good question, Bruce! This is to change the pin arrangement on the old non Smart Cable, it is an insert the tool will tell them to use depending on the vehicle and system they are trying to access.