While principles of electricity work well in the classroom, the application to reality can sometimes be hard to see. Basic principles of electricity are used in a multitude of diagnostic applications whether you realize it or not.
Having an understanding of how the network is laid out and the protocol or protocols it communicates with are essential. A wiring diagram and a quick read of service information will usually provide a quick insight of the network’s layout and communication characteristics.
With the need for higher control of the power output, better fuel economy and lower tail pipe emissions this age old system of accelerator pedal, linkage and throttle blade has been modified. This modified system is referred to as Electronic Throttle Control (ETC).
This article will document the infamous U2098 (MOST Communication Enable Circuit Short to Ground) but before we discuss the MOST protocol, let’s discuss a slight bit of GM protocol history namely; GMLAN.
Chasing down the cause of an electrical problem stress you out? Let’s see if we can make things a little easier for you with a short selection of tips and techniques you can take back to the bay immediately!
The CAN protocol has emerged over the last 25 years as the dominant automotive programming language. In 2008, regulations required that all vehicles sold in the U.S. must use the CAN protocol to communicate with emissions-related microprocessors.
Aftermarket professionals working toward additional certifications through professional organizations can get one step closer to their goals by attending the free one-day Commitment to Training event at Washtenaw Community College in May.
Diagnosing and repairing diesel no-starts can be very profitable if you know what to look for. The rules have changed in the last few years so it pays to know what to expect on a newer diesel vehicle with a no-start condition.
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