Engineering:Passthrough device
From HandWiki
A passthrough device is used in conjunction with a computer to reprogram vehicle control modules through the OBD-II/CANbus port.[1] Each manufacturer has their own type, but SAE International standardized the J-2534 universal requirements in 2004, requiring all manufacturers to allow vehicles sold in the United States of America and Europe to accept powertrain reprogramming through specific universal parameters.
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