Tools for TPMS Diagnostics

Tools for TPMS Diagnostics

The features of new TPMS scan tools lead the way for us as technicians to make short work of diagnosing a problem.

It is often true with new technology, Tire Pressure Monitoring System (TPMS) diagnostics were difficult when the unfamiliar systems began to trickle into our shops 20-some odd years ago. Part of the reason may have been unfamiliarity, but I seem to remember a lot of inconsistencies with service information, system operation, system resets and sensor types, just to name a few of the woes.

It was just another one of the typical growing pains we face in our industry. How many TPMS sensors did you break, especially the banded ones, before you trained yourself to consciously think about them when dismounting a tire?

The good news is, if I had to pick one piece of technology and its associated diagnostics that has improved considerably in the last few years, it’s TPMS. I give a lot of credit to the one thing that is greatly responsible for it: the TPMS scan tool. And I can take it a step further and credit the people behind the scan tool.

One reason that TPMS diagnostics are always a prevailing topic is that tires don’t have time on their side. From the second a new tire hits the ground, it’s a magnet for potholes, punctures and curbs. And it always happens at the worst possible time; on your way to work or on vacation hundreds of miles from home. And tires make people worry. Low tires make people worry even more, and not knowing if a tire is low makes people worry the most. We have come to depend on TPMS.

Whether it’s a reset, relearn or repair, regardless of the cause, as technicians, TPMS service is one that we must be able to perform quickly and efficiently, and our friends in the tool industry recognize this. They know we don’t have time to waste. They know we need to be profitable, and they know more than anything that more often than not, someone may be waiting on their car.

The features of new TPMS scan tools lead the way for us as technicians to make short work of diagnosing a problem. To begin with, they can either scan the bar code on the VIN tag, or automatically identify a vehicle through the wireless vehicle communication interface. Easy stuff. Then, their user interfaces are as good as any new cell phone. They simply make it easy to understand. Real people are designing these tools.

And who works relentlessly with auto manufacturers to make sure they have all of the information and can perform all necessary procedures to any make or model? The folks that design the scan tools, that’s who. They work hard so we can get the job done.

Many TPMS scan tools also take the place of having to look up service information. For example, they can give us the relearn procedure for every vehicle equipped with TPMS. It’s right there at your fingertips.

And they’ve even taken it a step further. In the past, there have been many different sensors, making compatibility an issue. Some scan tool manufacturers are also designing sensors that can be used in almost every make or model, allowing us to keep one sensor in stock for virtually everything. Talk about saving time!

If there’s icing on the cake, many TPMS scan tools can access tire information or allow you to enter it, as well as generate comprehensive test reports that can be easily shared with your customers. They cover all the bases, make it efficient for us as technicians and wrap up TPMS diagnostics in a nice package.

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Scan Tool Tech

While systems can and will differ, here’s a look at common ADAS features, their general configurations and calibration requirements.

scan tool tech

Advanced Driver Assistance Systems (ADAS) require the use of a scan tool for diagnostics, and the majority of the time, it’s required for post-repair calibration. ADAS, like any other system, requires a diagnostic routine, which begins with a base knowledge of the system. Knowing ADAS will help understand fault symptoms and scan tool data for the most efficient diagnosis.While systems can and will differ, here’s a look at common ADAS features, their general configurations and calibration requirements.Parking assist sensors, of which there can be more than one, are generally located in the front and rear bumpers. They are the inputs that affect active parking assist and parking collision warnings. Any time they are disturbed in any manner, a static calibration must be performed with a scan tool.Side object sensors, sometimes called collision avoidance sensors, are commonly located in the rear bumper. These sensors provide input for blind spot warnings, lane change alerts and rear cross traffic warnings. Static calibration with a scan tool is required when these are removed or replaced.Rear vision cameras will be located in the rear decklid, liftgate or tailgate, and act as either a backup camera alone, or part of a surround view system if the vehicle is so equipped. These cameras generally require a dynamic calibration, and no scan tool is required.A forward-looking camera is sometimes located behind the grille, and usually part of a surround view system. These too do not require a scan tool, but a dynamic calibration must be performed when they are removed or replaced.Different ADAS features may have dedicated control modules which can be located in various areas, often behind interior panels. As with most control modules, these require scan tool programming when replaced and, depending on the system, both static and dynamic calibrations may be required.The Haptic Seat Motor creates the vibration to provide a safety alert for blind spot, forward collision, lane departure, lane keep assist, parking collision and rear cross traffic warnings. These motors, sometimes called seat warning actuators, generally require no type of calibration.Cameras located in a sideview mirror are part of surround view systems. These require calibration when removed or replaced, but most of them dynamic, and no scan tool is required.The steering angle sensor located in the steering column is an input for lane keep assistance, and a static calibration is required with a scan tool any time it is removed or replaced, or any time a wheel alignment is performed.Last, but not least, is the front view, or forward-looking camera located in the windshield area. This camera is a vital part of adaptive cruise control, automatic emergency braking, automatic high beam headlights, forward collision and lane departure warnings, and lane keeping assistance. A scan tool and static and dynamic calibration are required after removal and replacement, but also after windshield removal or replacement, or any service that affects the ride height of the vehicle. TS

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