How Well Do You Know Your Driveshaft?
How To Answer Customer Ride Control Questions
TPMS Valve Stems – What Are The Trends? What Is The Future?
How Well Do You Know Your Driveshaft?
How To Answer Customer Ride Control Questions
TPMS Valve Stems – What Are The Trends? What Is The Future?
Sponsored By BCA Bearings by NTN
Sponsored By Carter Fuel Systems
Sponsored By NGK Spark Plugs
AC Diagnostics: Troubleshooting Pressures and Temperatures
The most difficult AC complaints to resolve are the system blows warm, or the air is not as cold as it once was. The causes of the declining performance could be caused by a multitude of components and conditions. In a 45-minute webinar, the experts from Transtar AC will cover the possible causes of AC failure.
The training session will cover:
Speakers Andrew Markel, Director of Technical Content, ShopOwner Dennis Husband, ASE Certified Technician, Transtar AC
Sponsored By BCA Bearings by NTN
The July issue includes technical and management content and is free to download and read.
Presenting your customer with inspection results and benefits of replacement will help sell the job.
The reality is that if you can master some very general skills, ADAS is not rocket science.
Brake & Front End serves repair shops conducting a high volume of undercar repairs by providing application-specific technical information and solutions to address emerging trends in the undercar repair segment. By subscribing, you’ll receive the ShopOwner digital edition magazine (12 times/year) featuring articles from Brake & Front End and the Brake & Front End eNewsletter (twice weekly). Access to digital editions, contests, news, and more are ready for you today!
Brake & Front End serves repair shops conducting a high volume of undercar repairs by providing application-specific technical information and solutions to address emerging trends in the undercar repair segment. By subscribing, you’ll receive the ShopOwner digital edition magazine (12 times/year) featuring articles from Brake & Front End and the Brake & Front End eNewsletter (twice weekly). Access to digital editions, contests, news, and more are ready for you today!
ByBrake and Front End Staff on Aug 12, 2022
Next year will mark 40 years for Robert Roos in the industry and he says it’s been an incredible journey.
Don’t settle for “almost” - it matters where the engine is manufactured or remanufactured. Sponsored by ACDelco.
GM transmissions and transfer cases are unique to each individual vehicle. This video is sponsored by ACDelco.
Don’t settle for “almost” - it matters where the engine is manufactured or remanufactured. Sponsored by ACDelco.
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The difference lies in how the sensors measure wheel speed. This video is sponsored by BCA Bearings.
Before you can diagnose a suspected faulty wheel speed sensor, you need to have a good understanding of the type of sensor you’re working on and how it functions. There are two different types of wheel speed sensors – Active or passive. There is no way to visually identify which type of sensor you’re dealing with. OE service information won’t specify the sensor type, and neither will the DTCs.AdvertisementPassive Wheel Speed Sensors Passive wheel speed sensors are two-wire permanent magnet sensors. They produce an AC voltage signal which is generated when a toothed tone ring or reluctor passes by the sensor. This reluctor may be part of the CV axle or wheel bearing assembly. To test the sensor, disconnect the harness and use a DVOM to measure the AC voltage generated by the sensor as you spin the wheel by hand. You should see a reading of around 0.5-1.0 volts. The faster the wheel spins, the higher the voltage output. Some passive sensors may receive DC voltage through the ground wire from the ABS module. To test this type of sensor, disconnect the sensor and backprobe the positive lead to the signal wire and the negative lead to the other side. This voltage comes directly from the ABS module and should be between 1.5 and 5 volts.AdvertisementActive Wheel Speed Sensors Active wheel speed sensors used to look the same as passive sensors, but they are much more accurate at lower speeds. Active sensors output a digital signal, a DC square wave signal. To test this type of sensor you’ll need a scan tool which can communicate with the ABS module, or a DVOM which can graph a digital voltage signal. Active vs. Passive: Real World Example Let’s look at a real word example of why it is so important to identify which type of sensor you are working with, the 2007 model year Chevy Silverado and GMC Sierra. In this single model GM produced two different platform trucks, the GMT 800 platform trucks which came with passive sensors and the GMT 900 platform trucks which came with active sensors. If you were working on one of these very common trucks, you would need to know more than just the year, make, model to determine which type of sensor you are working with.Advertisement This video is sponsored by BCA Bearings.
Passive wheel speed sensors are two-wire permanent magnet sensors. They produce an AC voltage signal which is generated when a toothed tone ring or reluctor passes by the sensor. This reluctor may be part of the CV axle or wheel bearing assembly.
To test the sensor, disconnect the harness and use a DVOM to measure the AC voltage generated by the sensor as you spin the wheel by hand. You should see a reading of around 0.5-1.0 volts. The faster the wheel spins, the higher the voltage output.
Some passive sensors may receive DC voltage through the ground wire from the ABS module. To test this type of sensor, disconnect the sensor and backprobe the positive lead to the signal wire and the negative lead to the other side. This voltage comes directly from the ABS module and should be between 1.5 and 5 volts.
Active wheel speed sensors used to look the same as passive sensors, but they are much more accurate at lower speeds. Active sensors output a digital signal, a DC square wave signal. To test this type of sensor you’ll need a scan tool which can communicate with the ABS module, or a DVOM which can graph a digital voltage signal.
Active vs. Passive: Real World Example
Let’s look at a real word example of why it is so important to identify which type of sensor you are working with, the 2007 model year Chevy Silverado and GMC Sierra. In this single model GM produced two different platform trucks, the GMT 800 platform trucks which came with passive sensors and the GMT 900 platform trucks which came with active sensors. If you were working on one of these very common trucks, you would need to know more than just the year, make, model to determine which type of sensor you are working with.
This video is sponsored by BCA Bearings.
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Technical Resources for diagnosing and servicing undercar components