TXsilverado

iTrader: (19)

got my wife a 04 tahoe. one day i was riding with her and it went into limp mode. i found the battery cables were very loose and assumed that was the issue for the u0107 code.

yesterday she got off work and it set the u0107 code and would not let her go over 10mph. i was out of town. i cant have this ****...

today i replaced the throttle body with one from my parts pile, then went to my caveman style diagnosis.

unplug the throttle body when the truck is running, and it throws all kinds of P codes. unplug the smaller plug from the TAC module on the firewall and it also throws a ton of P codes. when i unplug the larger plug on the TAC module it throws the U0107. i jiggled the hell out of the plug, and nothing, i pulled the loom from the wires and pulled/wiggled/jerked on every wire and got nothing. all of the power and grounds under the fuse box lid are tight. the grounds on the firewall and driver's head are tight.

what are the odds that the new throttle body fixed the issue? I'll send this POS down the street and buy another toyota if i cannot trust it to get my wife A to B.

annnd this is why i hate electronics. give me a damn cable from my foot to the throttle body!

FFDP

iTrader: (2)

Check and clean some of the engine grounds too. I've read in the past that some of the communication codes can be from battery voltage/ground issues.

smokeshow

iTrader: (16)

Contact resistance can rear its ugly head when you load down a circuit. If the throttle moves and draws a lot of current through a poor connection, it can drop TAC module voltage enough to cause a module reset. This will show up as lost communication. I'd try dicking with the pedal with key on engine off. Just WOT/lift foot it as fast as you can repeatedly. If it is contact resistance, that should throw the fault. Not much else to go wrong other than a bad module (I've said that before..).

TXsilverado

iTrader: (19)

I tried everything I could to get it to act up. no dice. hopefully the new throttle body fixed it. only time will tell I guess.

TXsilverado

iTrader: (19)

it did it again this morning. I'm replacing the TAC module later today. I found one at a local junk yard for $35. I'm not sure what else to do if this doesn't work. all of the wires and grounds look good to me.

TXsilverado

iTrader: (19)

the new tac module did not fix it. I read that a few people fixed the issue with better grounds. I replaced the rear main seal on it yesterday and found that the woven ground strap from the firewall was bolted to the transmission bell housing instead of the back of the driver's side head. I cleaned up all of the grounds on the back of the motor, and moved them to the correct spots. I'm crossing my fingers.


this is stupid.

12secSS

iTrader: (30)

Is it a NICK WILLIAMS throttle body that's your problem...

TXsilverado

iTrader: (19)

it was a stock throttle body. I found a ground bolted to the bell housing of the transmission instead of the back side of the driver's cylinder head when I replaced the rear main seal. The truck hasn't had a problem since I relocated that ground back to the head where it belonged.