Diagnostic testing is one of the important tools our technicians use to assist with repair diagnosis. Since the 1980s, cars have had computers and sensors that have enabled the automation of many processes. This has made it easier to focus on driving. Computerization has also greatly assisted in problem diagnosis. As your Mazda dealer, we want to tell you how a diagnostic test works to identify and speed up repairs.
Computer and Sensors
Your Mazda has a vast number of sensors, each of which is connected to an important component. The sensors receive instructions from your computer and relay information back to your computer, which then makes decisions. Oxygen sensors, for example, monitor the level of oxygen in your engine and inform your computer. The computer will increase or decrease the flow of oxygen to the engine to maintain efficient combustion.
The sensors are very sensitive and can detect the smallest issues with their connected components. They send this information to your computer, which logs the information and assigns the problem an error code. The computer then illuminates one of the warning lights on your dash to advise you of the problem.
What a Diagnostic Test Does
Our technicians connect a diagnostic reader to your car’s computer. This reader scans the system for error codes and displays them on its screen. Our technicians compare the error codes to the list of error codes, enabling them to quickly identify the affected system. The codes don’t necessarily identify the exact issue, but our technicians can save an enormous amount of time that would otherwise be wasted in examining unaffected systems.
Now we know how testing works, let’s look at an example of a problem a diagnostic test can identify.
Blocked Catalytic Converter
The catalytic converter is responsible for converting dangerous and toxic chemicals produced by combustion into harmless chemicals. It does this utilizing immense pressure, extreme heat, and chemical reactions. Once the chemicals have been converted, they exit the tailpipe. Carbon is a byproduct of the conversion process, and it can build up inside the converter and block it.
A blocked converter forces the unconverted engine gases back into the engine. This increases pressure inside the engine and can cause misfiring or force your engine to shut down. If an error code identifies the converter as a problem, we’ll investigate it first. We’ll clear the blockage from the converter, and the conversion process will work normally again.
A diagnostic test reduces the time spent on diagnosis, and this saved time translates into reduced repair costs. If you have an illuminated dash light, visit our service department today at John Lee Mazda in Panama City, FL, and we’ll find and fix the problem.
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