Magazine for the auto service professional
Issue link: http://asp.epubxp.com/i/780462
24 | ASP February 2017 Technical Mode $06 shows actual test results and information but only if the readiness monitors status from Mode $01 shows that the monitor is complete. is is important to remember because there may be data there before the monitor has run to completion and this may just be garbage data until the monitor has to run to completion. Sometimes this data may need to be converted to usable values if your scan tool doesn't do it automatically. Many manufacturers' websites provide information on how to do this and what the values mean. For example, Ford's OBD-II information is free and a valuable resource that explains how systems are tested as well (www.motorcraftservice.com/FreeResources/ OBD). I like to look at Mode $06 data to see just how bad a particular component has failed; this is very helpful in P0420/430 catalytic failure codes. Mode $06 is not only useful for finding Ford misfires; it's also really handy at identifying other issues that may appear after clearing a code. I like to take a look at Mode $06 and see if any other tests are close to failing even though they are not related to the code or issue that I'm diagnos- ing or have just repaired. Many times, a misfire code will shut off the enabling criteria for many other tests, and it's good to have the information that the evapo- rative, or EGR system, was close to failing or that the catalytic converter was already borderline to warn a customer of another impending repair. Mode $07... Request the emission-related diagnostic trouble codes detected during current or last completed driving cycle. is mode shows the codes that are pending or waiting to mature. Mode $07 was designed to aid in diagnostics after a repair by showing a test fail after one drive cycle. If the test fails again a related DTC will be stored. But if the fault is not seen again for 40 to 80 warm-up From this screen capture you can see that there are no permanent codes (this example is a 2006 Saturn), but you see Mode $03 codes and the Mode $07 freeze frame data and the code that set that data. Mode $06 isn't just for Ford misfires. This view shows that the EGR system barely failed and after testing the operation of the EGR valve it was found that the EGR passages were plugging up.