What is a Drive Cycle in OBD-II?

Drive Cycles are a warm up sequence that the vehicle must complete to allow conditions for all of the onboard tests.  When codes are cleared, so are diagnostic results, this means that if you are going for an emissions test and you have a fault code, if you clear the code just before the test, there will be not only a Distance since DTC Cleared setting, but your vehicle will not have ran through several drive cycles which are required and your vehicle will fail by default.

There is a flaw in the NEXIQ USB Link 2 driver installer that causes any J1534 compliant software to look in the “WINDOWS” folder for the dll files, if your windows folder is called WinXP, Win7, WINNT or any other name, PF-Diagnose is fine but the Nexiq driver will fail to load.  This is known by Nexiq and is to be corrected in the latest driver install, I recommend you install the latest Nexiq drivers or .contact Nexiq.  This is a Nexiq problem.  Pocketfleet is not a Nexiq Distributor. if you have one of our approved adapters by DG Technologies, you will not have this issue.

There are 2 main scan tools used for GM vehicles, the GM Tech II handheld and the MDI-2 GDS2 laptop based system. From 1992 to 2009 + certain newer vehicles,  GM vehicles use the Tech 2 handheld scan tool.The Tech 2 is the same scan tool as is used also for GM, Saab,
Izusu, Suzuki and Saturn including the Saturn Astra (Opel import).

The Tech 2 scan tool simply uses different 32 MB software cards which are removable and switchable. We are lucky it is so versatile. Extra memory cards which cost an average of $449.00 allow us to expand our diagnostic capabilities really cheaply.

The automotive diagnostic equipment Tech 2 scan tool is also used for reflashing GM vehicles.It uses a serial adapter with a network cable to connect the tech 2 to your laptop. NOTE  a serial adapter is used on the laptops 9 pin serial port.DO NOT try to connect the tech 2 directly to your laptop with just a network cable. IT WON”T WORK.

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