New DTCs appearing after a repair is more common than you might think. The reasons why are several, but the most common are a failure to make sure all the OBDII test monitors are Ready, failure to address pending Diagnostic Trouble Codes (DTCs), and not investigating the cause of Mode $06 failed test results.
In our first case study we are using the Toyota Techstream OE factory scan tool on a 2005 Scion tC. Let’s take a look at one of the most important pieces of scan data that many of us overlook, monitor information.
A few comebacks are caused by faulty parts or an honest mistake made during the repair process. But many are the result of basic flaws in the diagnostic process, made in the very beginning that doomed the repair from the start.
The Digital Multimeter (DMM) and Digital Storage Oscilloscope (DSO) both can be used to measure voltage, but the way each displays that voltage reading, and what you can learn from it, is very different.
This month, TST members share some of their personal diagnostic stories. Consider the process they used to successfully complete the repair as you read them. How would you have approached these problems?
Certified Technician is the newsletter for automotive repair professionals. Get the latest news, tech tips and diagnostic techniques delivered straight to your in box. Sign up today! Published every Monday and Thursday.