Scan tools have been around for decades and became a very necessary tool in the 1980s as vehicles switched from carburetors to fuel injection, which of course meant they now had an on-board engine computer. Today’s vehicles have between 5 and 50 on-board computers; the scan tool is a device that lets a qualified technician communicate with these on-board computers in order to diagnose problems, test systems, and make software changes. Today’s scan tools – many of which aren’t actually “tools” anymore, but laptop-based programs – are pretty advanced. That being said, most customers don’t realize how little the scan tool actually contributes to an accurate diagnosis, and how quickly in the process the human brain must take over from the tool.
One of the more regular things that we use a scan tool for is to diagnose a warning light, such as a Check Engine or ABS light. Whenever a warning light comes on, this means that an on-board computer has detected some sort of problem, and stored a “trouble code” as a result. In the case of the Check Engine light, these codes read something like P0302 or P0171.
For diagnostic service in Huntington Beach visit Val & Mike’s Beach Cities Auto Repair.
Val & Mike’s Auto Repair Huntington Beach
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