Active Wheel Speed Sensor Logic
From the heat-treated wheel bearing races to the microcircuit inside the ABS module that processes the signal, it’s imperative to understand the mechanical and electrical operation of this foundation technology that is critical to ABS, stability control and ADAS.
Live Axle Bearing Replacement
Replacing wheel bearings on a vehicle with a live rear axle may not be one of the most frequent jobs you do, but it can be one of the most profitable. While the basics have not changed in more than 60 years, new seal materials and differential designs have added new wrinkles to the process.
Understanding Fuel Trim Theory and Operation
The modern engine measures two things extremely well, the amount of air going into the combustion chamber with the MAF sensor, and the byproducts that are generated by the combustion event with the oxygen sensor. These measurements allow the engine’s computer to put the right amount of fuel and spark into the cylinder to give the most efficient and cleanest combustion event.
Top EVAP Tips When Replacing Fuel Pumps
Nothing is worse that an EVAP code after a fuel pump has been replaced. Discovering that the tank needs to be dropped again to address a problem can kill productivity and profitability. The following tips can help you avoid comebacks and having to drop the fuel tank for a second time.
Test, Bleed, Flush: How Can You Protect Your Customer’s Brake System?
Visual inspection of the fluid can be extremely misleading. The color of brake fluid can vary from clear to shades of blue. Even if the brake fluid is discolored, it might still meet the system’s performance requirements.
Measuring Pedals and Pads
On a mechanical level, it’s easy to understand how brakes work. We all understand that brake fluid transfers force from one hydraulic component to another. But, how does this apply to how a brake pedal feels?
Direct Fuel Injection Diagnostics
Direct injection is becoming standard on more and more late-model vehicles, and while these systems can be a diagnostic challenge, with the right foundation, problems can be solved profitably.
Inspecting Modern Drive Belts — Look, Listen and Feel
A serpentine belt can look good to the naked eye. But, to the ear, odometer and measuring tools, it could be another story. When you are looking at the belt and the pulleys on which it rides, it is critical to use all of your senses.
Advanced Import Ride Control Diagnostics and Replacement
With more and more air-ride-equipped vehicles accumulating miles, you can expect to see a steady stream of these air-ride systems in your bays. You also have more options than ever before when it comes to replacement parts and conversion kits.
TPMS & Radio Waves: What You Can’t See Can Hold Up a Relearn
TPMS and keyless entry can be difficult to understand because these systems rely on transmitting, receiving and decoding radio waves. You can see wires connecting modules and components, but seeing radio signals takes a little faith in science.
Electric Power Steering: More Than Just an Assist
Electric power steering is quickly becoming a standard feature on new vehicles, but it’s not an emerging technology. It’s been in the field for the better part of two decades. Now, electric power steering has continued to advance by making autonomous safety features possible.
5 Spark Plug Tips
Here are 5 little-known tips about spark plug replacement that you probably didn’t learn in school.
