Diagnostics Archives - Page 12 of 46 - UnderhoodService
Diagnostic Strategies For Stop/Start Systems

This function of the power management system that uses several modules to decide when the engine needs to stop and start.

Tech Tip: Alternator And Battery Testing Diagnostic Tips

For some vehicles, it’s normal to see as high as 16 volts for long periods at a time. For others, it’s ­normal to see as low as 13 volts. For some, a constant 13.6 volts is an indication of a problem.

Making A Living With A Scope

All technicians know more complex cars with more expensive modules and sensors are coming to shops so parts swapping is not usually an option.

How To Resolve DTC C1130 For Nissan Vehicles [VIDEO]

Andrew Markel discusses how to resolve chassis DTC C1130 and how it might not be an issue with the ABS system, but the ECM. Sponsored by Nissan.

VIDEO: What Does That Code Mean? Find Out Using A Service Information Database

Andrew Markel discusses cross-referencing and crowd-sourcing features of some service information databases, and how they can help you find out the causes and solutions for scan code information in the fastest way. Sponsored by ProDemand from Mitchell1.

Navigation Tricks For Getting The Most Out Of Your Service Information

Being able to navigate the service information quickly is just as an important skill a scanning for codes. Here are 10 tricks that can help you find the information faster.

Are You Using Your Scan Tool To Its Fullest?

Plug it in, scan for codes, it seems like the same thing over and over again, and when you’ve got one eye on the clock, it’s easy to rush through a few steps to get from point “A” to point “B.” But are you getting the most out of your scan tool?

VIDEO: Spark Plug Fouling: The Canary In The Engine Coal Mine

Is it the oil? The gas? Or, the coolant? Spark plugs can be the “canary in the coal mine” for underlying engine issues. Find out 3 things that can foul a spark plug and how to spot the problem with Andrew Markel in this week’s Maintenance Minute!  Sponsored by DENSO.

Where’s That Machine?

Code numbers and definitions are a strategic direction for the repair. These tools allow a trained mechanic to know which pathway to take. The real “machine” that finds out what is wrong with a car is the brain of the very guy or gal working in the bay.

Catching The Electron Flow: Multimeters And Fuse Box Diagnostics

Gary Goms explains why the multimeter is the first tool he reaches for in his diagnostic tool box when diagnosing electrical system problems.

Direct Injection Diagnostics: Taking Pressure Readings

Direct injection is becoming standard on more and more late-model vehicles. These systems can be a diagnostic challenge, but with the right foundation, problems can be solved profitably.

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VIDEO: Thimbal And Planar Oxygen Sensors

Andrew Markel goes over the composition of two types of oxygen sensors with a brief history into each. Sponsored by Bosch Automotive Service Solutions.

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