• What do you do when there is no As Built data published for the vehicle? Jaime Lazarus leads you through this reprogramming nightmare and shares his successful conclusion.
  • This Ford pickup had been around from shop to shop, even making appearances at a local dealership. The initial complaint seemed simple enough: no start, no communication and no odometer. Then why did the dealer technician toss his hands up in surrender after a month and a half without a solution? It's all about a testing method we've preached about before - voltage drop!
  • This article will take a look at some electrical system “basics” and explain how that information can transfer to high voltage system understanding and diagnostics.
    Jeff Minter
  • In electrical system design, testing and evaluation of operating conditions there are two circuit parameters of utmost importance to consider - voltage and electron current.
    Ground Circuits
  • A tale of an ailing F250 as told by a gas guy. Can you relate?
    Mike Reynolds
  • The current clamp is used to measure the electron current in one wire at a time, the preferred method, but it can also be used to measure more than one wire at a time provided the direction of electron current in each wire is known.
    ground circuits
  • When the engine begins to RUN the generator takes over as the source of electrical energy needed to operate all vehicle circuits.
    ground circuits
  • Now that we have a general understanding of electron current through a vehicle ground circuit, we continue begin measuring electron current and understand what each reading is telling us about vehicle electrical circuits during Key ON (KON) and engine run (RUN).
    ground circuits
  • When the engine is running there are significant differences in ground electron current which comes from the generator, the voltage supplier of the electrical system during engine run.
    Vince Fischelli
  • The dual ground configuration is very common but now that batteries are mounted in out-of-the-way places outside of the engine department a single battery ground cable is used to ground the battery negative terminal to the engine block.
    Vince Fischelli
  • If you don't know what you should see on a voltmeter — before you hook it up to the circuit — there's no point in taking the meter out of your toolbox   
    Jeff Minter
  • Diesel engine oil has been taken to a higher level of performance with the development of new American Petroleum Institute (API) specifications known as API CK-4 and FA-4, which were officially released for licensing on Dec. 1, 2016.
  • We use wiring diagrams in many of our diagnostics, but if we are not careful, they can sometimes lead us to make decisions that are not accurate, which can lead to wasted diagnostic time, unnecessary parts costs for the replacing parts that are not defective, and sometimes even missing a simple repair.
  • With advanced electric power steering technologies, it has become critical to understand that power steering is not simply driver operated.
    searchautoparts, dave macholz
  • This article will discuss the refinements that BMW has engineered to the intake system of the gasoline internal combustion engine, or ICE for short.
    Scot Manna
  • In this article we are going to investigate some of the history of these systems as well as the operation and diagnosing of them when a problem occurs. Moreover, we will investigate some of the radical changes in how we obtain security information and what we will be required to do moving forward.
    Eric Zeigler
  • During NACE Automechanika 2017 Eric Ziegler in his class, “Essential Diagnostics - The Steps You Need To Take In Tackling Every Drivability and Electrical Concern,” outlined his thoughts on what makes a good diagnostic process – a process that can be applied to any troubleshooting challenge you face.
    Pete Meier
  • G. Jerry Truglia’s taught “Reprogramming with J2534,” on July 27 during NACE Automechanika 2017 in Chicago.
    Pete Meier
  • So what to do about HMI? There are a lot of service opportunities that can be addressed because the radio in a vehicle isn’t operating correctly. Unless these vehicles are still under the factory warranty then there are plenty of service options available.
  • Modern vehicle systems are based on electronic controls over mechanical systems. To diagnose failures within these systems, we must first separate these systems from one another by analyzing the electronic control system. We need to look at a vehicle’s circuits for voltage change over time. This will be accomplished with an oscilloscope.