On a hybrid vehicle’s air conditioning system that utilizes a high voltage electrical compressor, can only the oil specified by the vehicle manufacturer should be used in the compressor or is PAG oil is acceptable for use in an electric vehicle’s compressor?
With dozens of electronic control units on automobiles built in the last 25 years, incidents of battery drain caused by an ECU that will not turn off when it is supposed to are on the rise. Tracing the ultimate cause can be made easier, though, if you know a few tricks of the trade. In this Dorman Training Center Lunch and Learn course, Director of Training G. Jerry Truglia shares a few of those techniques.
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Many high-end scan tools come with a capable digital storage oscilloscope. Time to put that tool to work.
Technician A and Technician B are discussing ways to use fuel trim as a troubleshooting aid. Technician A says that fuel trims that are correcting for a lean condition at high RPM and load conditions indicates a problem in fuel delivery. Technician B says that this condition is caused by a vacuum leak.
Technician A is diagnosing a misfire. He states that a misfire is caused by a fault in the ignition system and that new plugs and coils will repair the problem. Technician B says that a misfire is detected when the ECM detects a variation in crankshaft speed.
Need a smooth finish on a part you’re cleaning up with a file? Lemmy shows how draw filing can achieve a clean result with a totally different method of holding a traditional file.
The right tools will expand your capabilities and help you to tackle more advanced jobs, but it’s not always easy to know where to start.
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