I need help deciphering all the abbreviations used in todays repair manuals. I'm an older guy(58), & have trouble remembering what i had for lunch- the "70"s were fun, as I remember. Anyway, what the hell does IDL circut,PNP switch or NE circut or STA circut mean anyway?, & what's the difference between an ECU or ECM. I wish to compile a "dictionary" of sorts to help me in repairing my daughter's vehicles, till they marry a wealthy man who can take care of them. If any one knows where I can this info, I would be grateful.
Thanks, stormy76

 

TPS = Throttle Position Sensor, it has an IDLe contact that detects a closed throttle position (i.e. engine at idle):
http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

ECM is Toyota-speak for ECU, Electronic Control Module or Unit.

STArt indicates the STArter is being engaged.
NE is from the ignitor, essentially a crank position signal, says the engine is moving. Never heard of the PNP switch.

The Factory Service Manual has all those terms described.

 

PNP = 'Park / Neutral Position" The PNP switch is the sensor for whether an auto transmission is currently in the Park or Neutral position.

 

thanks for info. I was able to talk another "old guy" out of his '87-90' FSM's. God, what a difference from a chilton's. I'll never go back! As for the PNP, even the FSM doesn't list that one. you guy's know your suff
Thanks again, stormy76