Got NEW PCM today - Or did I? Code still there.
Hey everyone - 2005 Grand Cherokee Limited - I've had the *service 4wd system* for some time now.
It's not all the time, it's maybe 2 out of 3 times I turn the ignition on. If I turn the ignition on and it's there, I can turn the ignition back off then turn it on again and the *service 4wd system* may or may not be there. If it's not there I start it up and driveaway. If it is there I can repeat untill it doesnt show up. <--gets old
TODAY I GOT A NEW PCM because they had tried to down load the update and (you guys may remember) it locked up my PCM all together. Well, the next day they got it to come back to life & after that they then tried to load the update again, the load was succesfull - However the code came back. SOOOOO Today they gave me the NEW PCM!!
It did not work !!! The 2nd time I turned on the ignition there it was the *service 4wd system*!!!
1.Could it be because I have smaller tires? - Is there a sensor that knows how fast the tires are going and a sensor that knows how fast the driveshaft is turning and - those two should have the same equaled value - after certain considerations, ofcourse? If this were the case you would think it would come on only when I'm driving-- aka the wheels turning...
2.How about a bad sensor? if it were a sensor, wouldnt it happen all the time? and it would show a code! I can sit there and flip the ignition switch off then on until it doesnt show.
3.How about a bad ground? I can see that. But I think it would come on and go off when the Jeep jiggles, wiggles, hits a bump, makes a certain turn etc...
a)It never comes on while driving.
b)It never goes off while driving.
c)I can control it by the ignition switch.
d)Update was performed (reflash)on original PCM -- 'or was it?'
e)New PCM installed -It wasnt remaned It was new I saw it, but I didnt actually see the installation I left and went up to the waiting room- was it installed? yea had to be. -- 'or was it?'
If you get a new PMC is everything in the jeep supposed to be reset?
It wasnt. Nothing was reset - I'm speaking of things such as mileage to oil change, time driven nothing. anybody know??
Ideas on this entire situation???