Originally Posted by
ala_xfire
I must apologize, I have scanned through all the service manual information and cannot find exactly what drives the speedometer, or the cruise control.
I can find all the wheel speed sensors, but they all seem to feed just the ABS module.
Also, the automatic transmission has 2 speed sensors in it, but they just seem to feed the TCM.
I guess it is entirely possible that either or both of these put messages on the CAN bus that the PTCM reads to determine the current vehicle speed, and thus control the speedo and cruise, but I can't find anywhere that it is stated.
Bottom line : I ain't got a clue.
( In my business, this issue would need to be escalated to level 2 or level 3 people for an answer, but unfortunately we have NO L2/L3 people, unless someone wants to chime in )
Ala_xfire, you are right about the two speed sensors they are called n1 and n2 input output speed sensors and they do provide information to the can bus Which supplies information to all the other components, I checked it out on a forum called lxforums.com. type in nag 1 five speed automatic transmission Refresher.