Checking into Mode $06
Mode 06 is the actual system test data that OBD II looks at when it decides to set a pending code or a current fault code. If the test data is within the limits established by the vehicle manufacturer, the item gets a PASS and no codes are set. But if a value is out of range, OBD II flags it with a FAIL and keeps an eye on the component until the system monitor has run at least twice. Then, if the problem is still there, a DTC is set and the MIL light comes on.
Flash! Reprogramming Vehicle Computers
Typically, when someone brings up the subject of “flashing” you get two reactions. The technologically informed service professionals think about added revenue and service, while rowdier folks think about doing something that could land them in front of a judge. I think we can all agree that the first group is far better off, and
Searching for the Diagnostic Path
Most recently, I’ve found myself dealing with an increasing number of random, multiple-code complaints that involve computer operating strategies and networking communications issues in which the multiple trouble codes or DTCs tend to be symptomatic, rather than indicative, of a component failure. A basic illustration of what I’m talking about is a simple DTC 44,
A Tutorial in Hyundai Driveability
Diagnosing a driveability problem starts with the customer interview. When you are able to obtain the proper details about the vehicle’s symptoms, you will be able to diagnose the source of the problem more efficiently. Clues provided by the customer, such as “vehicle starts but runs rough until warm; worse when wet,” is invaluable information
How Sensors Provide ‘Good Input’ for Diagnostics
One of the systems that Subaru has perfected through improved reliability over the years has been its distributorless ignition system (DIS) for all of its models. Because of the horizontally opposed design of its engines, the ignition system can be centrally mounted and made simple. In this article, we will touch on some common diagnostic
Diagnostic Dilemmas: Playing the Diagnostic Shell Game
More often than not, deciphering diagnostic trouble codes is like playing a high-tech version of the old circus sideshow “shell” game. In the trouble code shell game, we are led to believe that the pea (diagnostic solution) is hidden under one of the shells (DTCs) stored in the diagnostic memory. Unfortunately for the diagnostic technician,
Selling Multi-Coil Ignition Parts
Time has indeed passed you by if you still believe in the traditional import engine tuneup. Many years ago, much of the import service market revolved around the annual spark plug, ignition cable, distributor cap and rotor replacement needed to maintain an import engine at peak efficiency. During the past decade, however, multi-coil waste-spark and
Understanding Operating Strategies
As driveability technicians, we’ve been taught to solve diagnostic problems by gathering and analyzing data. Data usually comes in three basic forms, the first of which is sensory data that we can see, hear, smell or feel. The second form is measured values gathered by using test equipment like lab scopes and multimeters. The third
Matching Your Techs with the Right Job
Just a single decade ago, many industry experts speculated that 80% of the workflow passing through an independent repair shop would involve some type of high-level diagnostic process. Today, it’s obvious that, with the infusion of electronic operating systems, high-level diagnostics is now approaching that level of total workflow. Nevertheless, many others continue to ridicule
‘Court’-ing Disaster
I just returned to the shop after what felt like the longest three hours of my life. I spent the afternoon in Small Claims Court, and while fascinating — the same kind of fascination that won’t allow you to look away when trains collide, planes fall out of the sky or fast-moving brush fires head