I too have been keeping an eye out for a DRBII scan tool. I have the manual for troubleshooting sensors and such on my truck, but it all involves using the DRBII. Like lately I was having trouble with my engine speed sensor, but couldn't say for sure if it was the sensor or not. I didn't want to throw a 80. 00 sensor on the truck without making sure. I don't like to replace parts, I like to troubleshoot. Anyways, the speed sensor had oil and and such all over it. So tonight at work, I sprayed it real good with carb cleaner and crossed my fingers. So far, it hasn't shut my alt, cruise, and a/c down at idle. Guessing oil was shorting it out and causing the ECM to think the engine wasn't running.
Earl