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The pulse width modulated duty cycle signal

December 7, 2021

Several years ago, when vehicles using these compressors were just starting to show up at shops for service with some regularity, we were searching to find some detailed information about their behavior to use in clinics.  There was not a lot of it available, so we borrowed several vehicles and did some videos.  The following are some clinic slides produced from one of those videos.
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Bipartisan infrastructure package authorized $7.5 Billion for EV charging.

December 2, 2021

This week, the U.S. Department of Transportation (DOT) took the first steps in establishing programs for a national network of electric vehicle charging stations, as mandated in the bipartisan infrastructure bill passed earlier this year. 
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Virtual automotive software & electronics fundamentals boot camp

December 1, 2021

The boot camp will teach learners how to quickly create circuits and code software to build their own diagnostic tools or training aids. They will also learn how to control advanced vehicle systems for the purpose of diagnosing real (or simulated) problems. Automotive service professionals will develop skills to create simulators, demonstrators, and will also learn how simple electronic and software circuits can be used with the Scan Tool to develop circuits that can make complex diagnostics easier.
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Diagnosing electronically controlled compressors

November 30, 2021

When preparing to conduct diagnostics on a system using an electronically controlled variable displacement compressor, the diagnostic process needs to focus on four areas.
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Exploring electronically controlled variable displacement compressors

November 23, 2021

Electronically controlled variable displacement compressors (ECVDs) have been in use now for over 15 years.  However, there are a lot of technicians in the field who have very little knowledge about them and their operation.
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EPA releases Automotive Trends Report

November 19, 2021

Vehicle enthusiasts may want to check out the U.S. EPA's newly released Automotive Trends Report.
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Electronically controlled variable displacement compressors

November 16, 2021

what if" this system used an electronically controlled variable displacement compressor instead of the pressure controlled variable displacement compressor?   What would the results be?
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Disassembly and inspection of a seized compressor

November 15, 2021

MACS Tim Iezzi takes apart a problem compressor in this step-by-step video.
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You can get Tesla repair information

November 10, 2021

Find out how to use Tesla software for aftermarket repair
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Troubleshooting the “what ifs” in a mobile A/C repair

November 9, 2021

High side:  Likely somewhere around 130 psi (at an idle) & 140 psi at 1500 rpm.  Why? With only a 35% charge in the system, the compressor isn't going to be producing a lot of pressure.
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