fbpx

Tech Tips: Diagnostic Tools

With the widespread use of computer-controlled ignition systems, ABS and fuel injection, the modern powersport technician needs to be comfortable using diagnostic tools.

With the widespread use of computer-controlled ignition systems, ABS and fuel injection, the modern powersport technician needs to be comfortable using diagnostic tools. These tools come in many different forms, but they all serve to make the job of identifying and fixing problems easier for the technician.

Many modern vehicles will show a trouble code on the instrument cluster. This may involve blinking out a trouble code with a check engine light or directly showing a code on a display. However, some models need a special tool before they will display a diagnostic trouble code (DTC). Suzuki provides a plug-in switch to change the self-diagnostic system from a basic user mode to a more specific dealer mode.

In user mode, the system can only tell the technician two things: if a trouble code is present and if the engine can be started or not. In dealer mode, the system can now display specific DTCs. The technician can then consult the service manual for that model to see what that code indicates and how to further evaluate the problem.

More advanced diagnostic tools can directly interface with the vehicle’s electronic control module. These tools may come in the form of a standalone diagnostic tool, computer connector cable with software or a PDA with a special connector and software. The more advanced tools will still show the DTCs, but often they will directly display the problem item in addition to the basic code.

Beyond reading DTCs, the special diagnostic tools can show a wide range of helpful information like engine temperature, intake air pressure, ignition advance, fuel injector interval and others depending on the vehicle sensors and the software. This gives the technician a detailed look into how the vehicle’s systems are performing.

Diagnostic tools are not only passive data display tools. In some cases, they are used to calibrate or adjust items like the throttle position sensor, idle speed controller and ABS systems. Often, the diagnostic tool is used or required to clear the DTCs in the engine control module memory. If the DTC causing the problem has been addressed, the codes need to be cleared so that a false reading doesn’t show in the future, or the code can show correctly if the action taken didn’t resolve the problem.

There are some important items to consider before using these tools. The technician needs to be sure to have the correct tool for the model being tested. Some manufactures use one tool across their entire line; others may have several different tools. Is a special connector cable needed for the model in question or does the tool connect directly? Is the tool self-powered or does it run off of the vehicle battery? Is the diagnostic tool software up to date? A quick look over the service manual will show if any extras or special procedures are required.

When dealing with FI and ABS systems, whether it be troubleshooting or tuning, a diagnostic tool can be the difference between a quick repair or wasting time and money guessing what’s going on with the vehicle.

Link: Cyclepedia

You May Also Like

Proper Motorcycle Tire Maintenance and Care

Maintaining proper tire pressure is a common maintenance issue.

motorcycle tires, maintenance, tire pressure, tire pressure monitor

In my last article on how tire makeup affects performance, I claimed tires blend into the background when customers look at bikes. Furthermore, they tend to take a backseat on the maintenance list for owners as well. In fact, if there’s one area in which motorcycle riders fall short in terms of motorcycle maintenance, it would be maintaining the proper air pressure in tires.

Pre-Season Motorcycle Maintenance Checklist

After sitting all winter, bikes need an inspection before hitting the road.

motorcycle maintenance
Two-Stroke Engine Tech Has a Future

As hybrid vehicles continue to be on the rise, the two-stroke engine might have a comeback.

two-stroke engine
Powersports Belt Maintenance Tips

Dayco’s new line of CVT belts are impressive, but you still need to know how to properly maintain them.

Motorcycle Sales and Technology Trends for 2022

Supply shortages mean less tech, although motorcycles still have plenty of new features.

motorcycle, technology

Other Posts

Snowmobile Engine Backfires and Spark Plugs

Learn what a back fire is and how to fix it.

Prepping Your Sled for the Season and the Importance of Spark Plugs

A pre-season tune-up can save you some major pains down the road.

Tips and Techniques from Lucas Oil to Keep Vehicles and More Protected During the Cold

Supercars, motorcycles, hot rods and even riding lawn mowers all have engine oil systems, fuel systems, transmissions and other components that require winter prep.

Lucas Oil
S2 Ep. 3: Engine Tear Down

It’s time to remove the engine and see what’s really going on inside.

Project X, engine