What is the problem? It’s the most basic and, oftentimes, most perplexing question in truck repair. Trucks are complex machines driven by computer controls. Fault codes do their best to point technicians in the right direction, but being able to quickly to diagnose the root cause of the service problem is paramount.
Enter bi-directional testing. This enables scan tools and service software to send test commands to the truck from the service tool software. For a visual look at how bi-directional testing works in the shop, watch the video above.
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