![]() ![]() In the last case the module lights its malfunction indicator lamp (MIL) up so the issue becomes visible for the driver. The priority of the issue may vary in range from not really important (rather some kind of warning) to crucial. Generally speaking, if a module finds an issue, it throws a diagnostic trouble code so a technician can read it and realize the issue exists. So it is important to understand what DTC is and how it works. Try to learn other users’ experience (can be found using Google by DTC or problem description).Īs you may see, read and analysis of diagnostic trouble codes is the first thing that has to be done. ![]() The workshop manual may contain a lot of helpful information, including pinpoint tests and diagnostic charts. Try to get more information using a workshop manual for the vehicle, if it is available. Obtain additional information using FORScan datalogger (read PIDs). If the DTC description provided by FORScan doesn’t contain enough information, go to Step 5. If there is no any code related to the problem, go to Step 6. Check for diagnostic trouble codes (DTC). In simple case, the troubleshooting sequence is: This article is written for people that have no these skills yet but looking for a start point. It means that FORScan operator must have at least some basic knowledge of troubleshooting principles in order to use it effectively. In contrast to majority of OBDII applications, FORScan is designed to use service level abilities, like a professional equipment. ![]()
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