Data link connector cat 31263/9/2024 This troubleshooting method will work for all truck makes but I will use a Freightliner Columbia in my example. I will show you how to find the potential problem in the J1939 data link. Most of the time these codes will get erased and minimal or no troubleshooting will be done. Trucks will come into the shops all the time with inactive codes for data links, such as ABS J1939 time outs, communication errors, and Engine ECU’s data link failures. The most common data link used is the high speed J1939. Let me explain: Modern day trucks have multiple data links used by all the electronic modules. What I am going to share with you about J1939 data link diagnostics is from life experience not text book. One of the most valuable things I will teach technicians is how to use a calculator to troubleshoot the J1939 in my Advanced Data Link and Fault Code Diagnostics Course. I have to teach everything on the vehicle from bumper to bumper, which could be 3 axle alignments to troubleshooting a data link. Working for a major fleet as a Technician Instructor I have taught many courses. Why I use a calculator to troubleshoot a J1939 data link, yes I said a calculator. J1939 Data Link Troubleshooting with a Calculator
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