My car has thrown the tcs/abs light for 3 years or so now and i havent been able to figure it out yet. Around the same time my a/c quit working and my tach is either jumps around random #'s or sits at zero, so the car really hasnt been driven more then a few hundred miles the last couple years. Awhile back i took it to the dealer and they had no idea what was wrong their best guess on a fix would have been a new wiring harness because a previous owner had probed a bunch of wires and had copper exposed in several spots. I took out the fuse box and went over all the wires down in that area and either spliced the bad ones or used liquid tape on the minor ones and it didnt change anything when i got it all back together today. I also went through the grounds and cleaned them up and used dieelectric grease going back together, they all looked good btw.
The car starts and runs just fine but cant get the tcs/abs light to go off or the a/c to work. I can reset my dtc's and within seconds the lights comeback on and the only new code is TCS C1276 HC, after starting the car a bunch more dtc's pop up but the big ones are C1255, C1278, C1281, C1286, U1255. The PCM will pull P0654, P1644 .

It seems to me like maybe the Delivered Tq Signal w/ the PCM and TCS, might be the problem but is it a sensor that could be replaced or just a # from pcm calculations being passed around? I unplugged the ebtcm and the connector looked good and clean but putting a probe on it while it was unplugged i only had power from 3 of the 6 pins on the small connector and zero from the larger connector is that normal?


I know this is a big problem to ask help with but im sick of this, I just want the car to be normal again and enjoy it.

heres one more odd thing i noticed today. My headlights go up and down just like their supposed to but when the driver side goes down the motor continues to run and makes an awful noise like the gears are stripped. I dont know why it continues to run after the headlight is down. Anyways while checking and cleaning the ground on my pass side behing the headlight it set off the driverside headlight motor, it wouldnt raise or lower my light just make the noise of the gears stripping out. After I cleaned it and packed it full of electric grease you could no longer move the ground plug around to activate the driverside headlight motor but is that anyway connected to my other wiring problems?

 

First of all, I would be very careful about random probing of a connector....especially if you do not know what circuit you are checking.

The last two codes have two things in common:

1) Both signals originate at the PCM
2) Both wires for said signals are within the same PCM connector(C2)...and withing 5 pin locations of each other.

I think it's time to inspect the PCM connectors for security/corrosion. Make sure you disconnect the battery first before removing the connectors on the PCM.