Electrical

  • 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.
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  • The Lithium-Ion family of battery technologies has quickly become the center stage product in the advanced technology vehicle market.
  • As simple service has evolved into the more complex “scheduled services,” the need to start hooking up a scan tool and see what is hiding behind door one, two or three is very important.  
  • Intelligent restraints systems are able to adjust their activity based on the severity of an accident and an entire book could be written on that subject alone, but this article will focus on the systems that are installed to try to avoid an accident in the first place.
  • Remember, the testing methods we used in the past may not be appropriate for use on vehicles today.  It is our responsibility to know how we are supposed to diagnose the systems we are taking into the shop. Are you accepting that responsibility? 
  • Vehicle manufacturers have moved to what is commonly known as the air/fuel ratio sensor, or AFS. With the change in technology has come a steep increase in the price of the replacement part, which means you need know how to diagnose sensor and air/fuel related faults. 
    searchautoparts, dave macholz
  • It seems today’s infotainment systems can provide nearly every comfort of home for us to enjoy in our vehicles. My question is why?
  • Make sure the crankshaft and camshaft positions are known and synced to ensure proper operation of the internal combustion engine.
  • Electrical problem analysis can be very rewarding if the technician is properly trained and has the proper equipment. 
  • In its simplest terms, voltage drop testing is the measuring of the voltage differences that may be present at various points in a circuit. The truth is, every circuit has some voltage drop.
  • Today’s power distribution centers do a whole lot more than provide a fused pathway. They need to provide power to an innumerable amount of onboard electronic devices and at the same time they have to do the job with less weight.
    searchautoparts, dave macholz
  • As hybrid electric vehicles (HEV) and its derivatives continue to populate the market, HV LOI failures have become a common failure mode for technicians to analyze, diagnose, and repair. 
  • Absorbed glass mat (AGM) batteries are nearly identical in appearance and chemistry to flooded lead acid batteries. 
    searchautoparts, dave macholz
  • Aside from air ride systems and electronically controlled sway bar equipped vehicles, if we keep our discussion to only electronically controlled shocks and struts, the systems really fall only into three basic categories.
    dave hobbs
  • You connect a scope the same way you would connect a multimeter to test for voltage. The difference is rather than looking at voltage numbers you are looking at a waveform.  
  • While there are still late model vehicles out there sporting the basic gauge package, sender-driven magnetic gauges are as archaic now as bimetal units were 20 years ago. Just about every instrument cluster is computerized.
  • 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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  • The February 2016 edition of The Trainer looks at the most common faults you’ll encounter when isolating the cause of an electrical concern.
    Pete Meier
  • Here are a few Honda Start Clutch relearn procedures. 
  • One of the most difficult things to diagnose in the automotive electronics world is electrical noise. There are more ways to cause noise, and noise is often classified as different things: distortion, interference, jamming, etc. Just to make it easier to talk about, we will just call it all noise.