Who Should Pay for Auto Repair Tools? Shop Owner or Employee? [E244]
Diagnosing the Aftermarket A to Z
Who Should Pay for Auto Repair Tools? Shop Owner or Employee? [E244] Diagnosing the Aftermarket A to Z · Jul 8, 2026
Who Should Pay for Auto Repair Tools? Shop Owner or Employee? [E244]

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Who Should Pay for Auto Repair Tools? Shop Owner or Employee? [E244]
Brand

Pico Technology

Pico Technology makes diagnostic electronics that plug into a computer. Their tools help mechanics look at electrical signals in the car to diagnose problems.

Term

PicoScope

PicoScope is a diagnostic tool that shows electrical signals as graphs on your computer. Instead of just reading error codes, it helps you see what’s happening in real time so you can find the real cause faster.

Term

live waveforms

Live waveforms are basically graphs that show how an electrical signal changes over time. In car repair, they help you confirm whether parts are working correctly by looking at the signal pattern.

Term

ADOS

ADOS is a name for a guided diagnostic process on some scan tools. It usually means the tool walks you through specific steps to test or set up a system, not just pull error codes.

Term

TPMS service

TPMS service is work related to the system that monitors tire pressure. A diagnostic tool can help reset/relearn the tire sensors and confirm the readings are correct.

Term

advanced safety systems

Advanced safety systems are the car’s newer safety tech, like sensors and driver-assist features. When something is repaired, a diagnostic tool may be needed to check the system and make sure it’s set up correctly.

Term

deepening a connector

They’re talking about a tool used to work on a wiring connector. Some connector repairs need a special tool so you can fix or adjust the connection without breaking the electrical parts inside.

Term

service department

At a car dealership, the service department is the team that does repairs and maintenance. They’re the ones who decide what tools they have for different kinds of work.

Term

inventory of tools

This is about keeping a list of the tools the shop owns. If nobody tracks them, tools can go missing and the shop may have to buy replacements instead of using what’s already there.

Concept

economic logic

They’re basically talking about whether it makes financial sense for an employee to buy their own tools. If the shop can reliably give them enough work, the tool purchase is more likely to be worth it.

Term

harnesses

A wiring harness is the bundled set of wires and connectors that routes electrical power and signals throughout the vehicle. Replacing a harness is usually more expensive and labor-intensive than replacing individual connectors, which is why the speaker compares the two approaches.

Term

replacing connectors

This means swapping out broken electrical plug-style parts in the car’s wiring. If a connector is damaged, the repair may require replacing it so the electrical connection works correctly again.

Term

air compressors

An air compressor is a machine that makes pressurized air. Shops use it to power certain tools and equipment.

Term

hoists

A hoist is the lift a shop uses to raise the car off the ground. It lets the mechanic work underneath safely.

Term

scan tool

A scan tool is a device that connects to the car’s computer. It can show error codes and sensor readings so a mechanic can figure out what’s causing the problem.

Term

wheel balancer

A wheel balancer helps make sure your tires and wheels spin smoothly. If they’re unbalanced, you can feel vibration and it can wear tires faster.

Term

alignment machines

Alignment machines measure how the wheels are pointed. They help a shop adjust the angles so the car tracks straight and tires wear evenly.

Term

AC machines

An AC machine is the equipment used to service a car’s air conditioning. It helps remove and refill refrigerant correctly.

Term

tire changer

A tire changer is the machine that helps take tires off and put tires on wheels. It’s what tire shops use to do the job efficiently.

Term

timing chain

A timing chain is part of the engine that keeps the camshaft and crankshaft working in sync. When it’s serviced, the timing has to be set correctly, often with special tools.

Term

cam alignment tools

Cam alignment tools help a mechanic set the camshaft timing correctly. That matters because the engine won’t run right if the timing is off.

Term

electric vehicle revolution

They mean the big shift from gas cars to electric cars. Repair shops will need new tools and training to work on electric cars safely.

Term

high voltage batteries

High-voltage batteries are the main energy storage units in EVs and many hybrids. They’re typically hundreds of volts, so diagnosis and service require specialized procedures and safety precautions.

Term

communication systems

This means the electronic “messaging” between the car’s computers. If that network has a problem, the car can behave strangely even if the main parts seem okay.

Brand

Autel

Autel is a company/brand that makes diagnostic tools for mechanics. They’re used to scan cars and help technicians figure out what’s wrong.

Term

ADAS

ADAS is the set of driver-assist features that help with things like braking and staying in the lane. If you repair something related to sensors or cameras, you may need to diagnose and calibrate it.

Term

TPMS systems

TPMS is the system that monitors tire pressure and warns you when a tire is low. After tire work, technicians may need tools to reset or reprogram the sensors.

Concept

replacement cost

“Replacement cost” is the money it takes to replace what you lost. The point is that some plans look cheaper until you include the real cost of starting over.

Term

cost per mile

“Cost per mile” means you take what you spend on the car and spread it out over the miles you drive. It’s a way to compare different ways of paying for car problems.

Term

two weeks notice

“Two weeks notice” means an employee tells the boss they’re quitting about two weeks before their last day. The shop then has to cover the work and train someone new, which can be costly.

Term

diagnostic tools

Diagnostic tools are the specialized equipment mechanics use to figure out what’s wrong with a car. They help avoid guessing and speed up repairs.

Term

OBD2

OBD2 is the car’s built-in computer system for diagnostics. A scan tool can plug in and read error codes so you can figure out what’s wrong.

Term

Smart Engine Analyzer

This is a diagnostic computer tool for an engine. It runs tests and helps you figure out what’s wrong—like ignition and other engine signals—using built-in measurement screens and automated checks.

Term

oscilloscope

An oscilloscope is a tool that shows electrical signals as a graph over time. Mechanics use it to see whether ignition or sensor signals look right, not just whether they exist.

Term

Exhaust gas analyzer

An exhaust gas analyzer measures what’s coming out of the tailpipe. By checking gases like CO and unburned fuel (HC), it helps you judge whether the engine is burning fuel correctly.

Term

carbon monoxide

Carbon monoxide is a gas that can show up when the engine isn’t burning fuel completely. Higher CO readings can point to a combustion or mixture problem.

Term

hydrocarbons

Hydrocarbons are basically unburned fuel that comes out in the exhaust. If the numbers are high, it usually means the engine isn’t burning the fuel properly.

Term

head gasket testing

A head gasket is a seal between the engine block and cylinder head. Head gasket testing is how you check if that seal is failing—often by looking for signs that combustion gases are getting where they shouldn’t.

Brand

Sun machines

Sun is a brand that makes shop diagnostic equipment. The host is talking about Sun’s engine analyzer tools used in repair shops.

Brand

Edge

Edge is a company that makes aftermarket car electronics. Here, they’re mentioned as the builder of a diagnostic tool that was sold under a different name.

Term

Sun 300

Sun 300 is a particular model line of engine diagnostic equipment from Sun. The host is using it as an example of the kind of analyzer they used in a shop.

Term

Sun 450

Sun 450 is a specific Sun engine analyzer model the host brings up as part of the same tool family. It’s an example of the higher-end options in that lineup.

Term

PC based engine analyzers

These are engine diagnostic tools that use a computer as the main interface. Instead of a standalone screen, the PC handles the software and display for the tests.

Term

MDA

MDA is a short name for another Sun diagnostic tool model. The host is listing it as part of the set of Sun analyzer acronyms.

Term

MEA

MEA is a short name for one of the Sun diagnostic tool models. The host is listing it along with other analyzer model acronyms.

Term

MCA

MCA is a short name for another Sun diagnostic tool model. It’s mentioned as part of the lineup of analyzer acronyms the host used.

Term

MCS

MCS is another acronym for a Sun diagnostic tool model. The host is listing several Sun analyzer names to show how many options existed.

Term

engine control module

The engine control module is the car’s main computer for the engine. It watches sensors and tells parts like the fuel injectors when to work.

Term

PCM

PCM is another name for a car computer that controls the powertrain. Think of it as the brain that helps manage the engine (and sometimes shifting too).

Term

scopes

A scope is a tool that shows electrical signals as a graph over time. It helps you see what’s really happening with sensors and actuators, not just whether something passes a simple check.

Term

current probes

Current probes measure how much electrical current is flowing. That’s useful for confirming whether something like a fuel injector is actually being driven the way it should.

Term

shorted multi-injectors

A shorted injector circuit means electricity is leaking where it shouldn’t. When injectors are shorted, they can fail in ways that simple tests might miss.

Term

low impedance

Low impedance means the circuit lets current flow more easily than normal. If a fuel injector circuit is “too easy” for current to flow, it can point to a short inside the injector.

Brand

General Motors

General Motors is a major car company. The host is saying GM had a special diagnostic tool for finding certain injector electrical problems.

Term

current waveform

A current waveform is a graph of how current changes over time. For injectors, it helps you confirm the injector is actually behaving correctly when the computer commands it.

Term

inductive kicks

An inductive kick is a brief voltage spike that happens when current to a coil-like component is turned off. If the spike looks wrong, it can point to an injector problem.

Term

resistance test

A resistance test checks how much electrical resistance a circuit has. The issue is that some injector problems don’t show up on resistance alone, especially when the parts are hot.

Term

load tested the injectors

Load testing means you check the part while it’s actually working under demand, not just with a simple static measurement. For injectors, it helps confirm they perform correctly when the system commands them.

Term

automated tests

Automated tests are computer-guided checks that a tool runs on a car. Instead of a mechanic doing every step by hand, the tool runs a set of checks and reports what it finds.

Brand

Fluke 87

Fluke 87 is a popular handheld electrical testing tool (a multimeter). Mechanics use it to measure things like voltage and resistance when diagnosing electrical problems.

Term

multimeter

A multimeter is a tool that measures electrical values in a car. It helps you figure out whether power is getting to a component or whether a circuit is broken.

Brand

meger

Megger (spelled like “meger” in the transcript) is a company that makes electrical testing tools. The host is basically saying they wouldn’t buy just any cheap multimeter—they’d want a specific, trusted one.

Brand

vantage pros

Vantage Pros refers to Vantage Pro diagnostic tools from Snap-on (commonly discussed as shop-grade scan/test equipment). The host mentions using them instead of buying a basic multimeter, implying they’re used for broader vehicle diagnostics beyond simple electrical checks.

Brand

snap on vantage

Snap-on is a company that makes car diagnostic tools. “Vantage” is the name of one of their handheld scan tools, and the host is comparing how capable it is versus other tools.

Term

Handheld two channels

“Two channels” means the tool can look at two signals at once. That helps when you’re trying to compare what the car is asking for versus what it’s actually doing.

Term

power graphing meter

A “graphing meter” shows measurements as a graph instead of just a number. That makes it easier to see problems that come and go or change quickly.

Term

histograph

A histogram is a chart that shows how often different values happen. In car diagnostics, it can help you understand whether a signal is steady or all over the place.

Term

duty cycle

Duty cycle tells you how long a pulsing signal stays “on” versus “off” during each cycle. It’s useful because some car systems use pulsed signals to control power and behavior.

Term

pulse width

Pulse width is how long the signal stays on during each pulse. It helps diagnose systems that use pulsed signals instead of steady voltage.

Brand

OTC perception

OTC makes car diagnostic tools, and “Perception” is one of their tool models. The host is saying it was an alternative to the Snap-on Vantage for certain diagnostic tasks.

Term

GM OBD-1

GM OBD-1 is an older computer diagnostic system used on some older GM cars. Because it’s older than today’s standard, you usually need a compatible scan tool to read the trouble codes.

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