When diagnosing today’s complex vehicles, we have a wealth of information at our disposal. How we use that information is crucial in making the correct diagnosis the first time, every time. In some cases the diagnosis may be cut and dry (fluid is burnt, the pump is whining, and the vehicle will not move). In other cases, the diagnosis may not be as easy, or worse; we may “think” or “assume” we already know the problem.
In this situation it was none of the usual items. It was, believe it or not, the transmission-fluid-temperature sensor. As I looked further into this, sure enough, I found factory bulletin 00-40-010 dated August 2000.