p Figure 7 - Wiring diagram of a 2021 Chevy Radar Sensor Photo courtesy of Ross Colket p Figure 8 - Screenshot of the oscilloscope feature on a Snap-on Zeus Photo courtesy of Ross Colket on the glass. We had one camera fail calibration because of an 8-1/2 " by 11 " repair sticker placed on the lower left portion of the windshield. The interesting part of that car was that we have done dozens of cars with that same sticker attached with no problem. Keep in mind the front radar sensor and the forward-looking camera are very closely linked so if there is a problem with one the other will be affected. As far as rear blind spot sensors go, the most common problems include the sensor not being replaced and the mounting frames being bent. You'll also want to check the body surface for distortion under the mounts. We have had a few body shops not properly repair the panel behind the sensor and this will not allow the sensor to calibrate. In closing, to be a full-service ADAS shop you are going to need additional tooling and service information. You will need to be proficient at reading and understanding wiring diagrams for diagnostic purposes. The use of an oscilloscope is mandatory for looking at the network (Figure 8). All of your ADAS systems are exchanging so much data, that they have to have a high-speed network to accomplish this. I recently attended a scope class where there were approximately 50 technicians. Most of the scopes still had their leads wrapped up from when they were purchased new. Do yourself a favor and make a point to work with your scope, this way you will be confident in making a diagnostic decision from the information provided by your scope. Take some time to look at different network types so you know what they look like and how to set up your scope. ROSS COLKET is the owner of Colket Automotive Technical Services in Lansdale, Pennsylvania. He is an ASE Certified Master Technician with over 30 years of experience as both a technician and educator. As a former CTI instructor, he believes in the importance of training and giving back to the industry. Ross fully supports and believes in Motor Age's mission to " advance the automotive professional. " ross@colkettech.com www.VehicleServicePros.com JUNE 2023 PROFESSIONAL TOOL & EQUIPMENT NEWS 29http://www.VehicleServicePros.com