It seems that everything automotive has gone digital, from your vehicle’s many onboard computers to online repair manuals. Electronic controls have made the internal combustion engine a more efficient machine with better fuel economy and fewer emissions. While digital tools can be invaluable for diagnosing some engine problems, they can’t be relied upon for every task under the hood.
Here’s an example: A scan tool can pull a code for a malfunctioning manifold pressure sensor, but it can’t tell if the car’s base timing is out of adjustment. Nor can it diagnose dirt buildup in the throttle body housing that might be restricting airflow into the engine, robbing it of power. In other words, the smartest onboard computers can’t still “see” everything going on in the engine bay.
The Scoop on Scanning
Autel Maxisys Elite Auto Diagnostic Scanner J2534 ECU Programming Key Coding
So, what are the essential items for the modern toolbox? A scan tool—also known as an automotive code reader/scanner—is a must for diagnosing engine codes on any vehicle with OBDII. A decent aftermarket scan-tool reader can sell for less than $100. Scan devices with a more robust ability to read factory codes can cost thousands of dollars.
When choosing a scan tool, pay attention to which makes and models it covers as well as its diagnostic capabilities. Can it only read the OBD codes or can it also read factory codes? Beware of factory knock-offs, and find out what kind of product support the manufacturer offers if the scan tool breaks. If the tool is J2534 compliant, it can be used to reflash (re-program) onboard computers.
Fluke 15B+ AC DC Ohm Auto range Digital Multimeter Meter Tester DMM with TL75
A good digital volt-ohm meter (DVOM) is also an invaluable piece of equipment—providing the ability to track down an open, short to ground, and pulse width, as well as the condition of fuel injectors and test diodes. The Fluke Corporation, founded in 1948, still makes one of the best multimeters on the market. Its meters are known for accuracy and their wide variety of measuring options.
On-School Tools Still Required
No matter how much new technology is added to cars, a good set of socket wrenches, drives, and extensions are still the heart and soul of an automotive technician’s tool box. We love Snap-on sockets because of their unique cloverleaf design that grabs the sides as opposed to the corners, making it easier to remove partially stripped bolts.
LED Xenon Bulb Timing Light with Advance Engine Motor
Because the car’s onboard computer doesn’t monitor base timing (set at the factory), you also still need a timing light. At some point, we all find ourselves doing electrical work under the hood, often requiring a soldering gun. Set up a station in your garage for soldering repairs with a clean work surface, power outlet, and good lighting.
Other must-have hand tools include a good set of screwdrivers including Torx, crescent wrenches (choose fixed size rather than adjustable), a brake spring remover, brake bleeder and adjustment tools—as well as torque wrenches for properly reinstalling wheels.
For changing oil, you’ll need an oil filter wrench and recycling pan. Don’t forget a gasket scraper for the next time you replace a thermostat or water pump. A creeper truck and good set of jack stands enable you to work safely underneath the vehicle.
Under-Hood LED Light Kit
Under-hood work lights make it easier to see into dark recesses. For a brighter light that uses minimal energy, you can update your shop lighting to the 21st century with LEDs.
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