The load cell provides a signal that can be captured through a laptop, scan tool or other capture device, such as the Vericom 3000. The anti lock brake system is a constant monitor system. This is usually caused by a faulty ground lead at one of the sockets, or, the wrong type of bulb was installed. If there is a separate amber turn signal lamp and a red brake lamp, then the two are usually wired separate. Unfortunately, our industry has more fiction than it does fact and this creates many of the problems we encounter See Figure 1. It is easier to understand if you look at it one portion at a time. The graph in Figure 27 shows the amount of residual pressure necessary to cause noticeable drag on a typical floating caliper disc brake.
Diagnostic Troubleshooting Tools Ask any service technician. This would generally be done on the calipers and wheel cylinders. . Just below the graph are the actual braking force results. Figure 26 shows a pressure reading during a normal stop on a vehicle experiencing high-speed pulsation. The buttons and capabilities seem to be the same.
Price and a lack of information on how to use the results are the two primary reasons for this. Panic braking is generally considered to start at about 600 psi. Do not ignore these warnings or safety could be compromised. Most multimeters can perform automotive-specific functions such as dwell, tach, etc. The best we can do is estimate.
When the computer sees a difference between the actual speed of the vehicle and an independent wheel. The most notable differences are the accuracy and types of use. I have lived by this statement for a long time and it only makes sense, right? We guarantee our Hand Tools to be free from defects in material and workmanship for the life of the product. Premature and uneven pad wear are two common symptoms of something else wrong in the system, as well as a rotor showing signs of over heating. I am including it to allow the reader to understand what is available and what is possible with such equipment. When it became standardized it simplified diagnosis of check engine lights. Unfortunately, this mandate has not trickled down to the anti lock braking system yet.
Isolating the wheel brakes can be useful in determining the location of a low pedal problem, brake noise, pulsation and some brake pull issues. I would certainly encourage fleets to take advantage of that. However, it still pulls down more good reviews then bad ones. At rest, each of the wheel brakes should be connected to the master cylinder reservoir through the open vent ports in both hydraulic circuits. Apply the brake first using light to moderate force as if making a normal stop. At Harbor Freight Tools we offer diagnostics testing products such as pressure test kits, digital code readers, digital tachometers, circuit testers and many other items that are crucial to vehicle diagnostics testing.
Remember that people who take the time to comment are often a tough crowd to please. String Potentiometer Known as string pot for short See Figure 11 , this device allows accurate measurement of the brake pedal travel. They are mounted as shown in Figure 11 and the outputs are piped into the data capture device. If you check out the abs tools listed on this page take a minute to check availability and prices on the wheel sensors. In the example shown, the front brakes produced 78. Auto diagnostic equipment by Actron inspects and tests automobiles for all kinds of problems and determines their relevant and reliable solutions.
For the average technician, the most important feature is the range of measurement. After- sales service: Free Technical Support 2. Well, the skid plate tester can help provide the answer to this important question. The numbers presented here are averages based on many tests performed on different vehicles. All the units include updated software, cables and memory space to tackle some of the most complicated auto repair diagnostics. The lack of specifications or guidelines on what the information means, places the burden on the shoulders of the brake technician. One of the most common repairs is the diagnosis of wheel speed sensors.
Infrared Thermometer This is a tool that is gaining popularity with brake technicians due to its ease of use. Some of the advanced units actually need to have the type of material entered in to provide accurate measurements. Avoid this by confirming your car or truck is covered. Scanners can help locate problem areas. The Actron test leads and circuit testers feature top quality and high visibility polyurethane leads for excellent memory retention and enhanced resistance to grease and oil.
A separate data stream and computer are used on some cars. At what point should you expect your technicians to be able to properly troubleshoot and repair a system that has been mandated on heavy duty tractors since 1997, and trailers since 1989? The only issue becomes were we using the correct ratio? Well, what if I say the most important tool a brake technician has is his mind. The other tools below are more expensive, but also have more features. This abs scanner can diagnoses the brake control module, pump motor, brake switch, wheel speed sensors, Anti lock control solenoids, vehicle speed sensors and more. I have an extensive amount of experience with this machine and can personally say this machine will find problems no amount of test driving or shop-based diagnosis will ever find. Make sure to properly bleed each gauge hose.
Well, none of the tools I am going to discuss will be of any use to you without a factual understanding of how the brake system and the components that comprise the system work. The data can be captured while the vehicle is either in a static or dynamic state. Pedal Load Cell This tool connects to the brake pedal and allows an accurate measurement of brake input force See Figure 10. For over 45 years already, Actron has been providing the vehicle repair market with the utmost in diagnostic tools, electronic and mechanical testers, timing lights, and specialty tools. Rear pressure is limited through the modulator and can only be checked in a dynamic state. Always follow all of the instructions and warnings included with our products. The data is captured during the entire stop event and provides information such as that shown in Figure 28.