Hello all! I am just curious if anyone has figured out a way to disable the TCS completely without erroring out the ABS unit. If any of you don't know, the TCM and TCS talk to one another even with the TCS is off. So the only way to bypass this is by faulting out the TCS.

For the Auto Z, we do not have a YAW sensor as ABS and traction control are in the same module. So there's no way to just have a bypass ran through the YAW sensor. I've checked the wiring diagram for the ABS/TCS module and cut and re-soldered all the wires that weren't related to the wheel speed sensors but all of them threw an ABS code. According to the FSM you CAN throw a TCS light without throwing the ABS light, but so far I haven't been able to figure out how to do that.

Any and all help is appreciated

(I can provide any wiring diagrams needed upon request as well)

 

Owners have reported attempts doing ths in the past; I don't believe anyone has been successful.

 

If not mistaken this can be turn of with uprev pro ?

 

What are you trying to do that can't be achieved by just turning TCS off?

 

It is Dugan day....

 

Today is not the day to experiment with traction settings lol

 

I do believe that you're correct. I'm just testing to see if there's a way of doing so without having to get a couple hundred dollar tune.

 

The TCM talks to the TCS even when traction control is off. This affects shift timing, the shift map, as well as limiting your RPMs from a launch. I'm assuming it's something that's only found in later model Z's due to the fact that the patent for the technology wasn't filed until about 2004 or 2005. Don't be mistaken, the TCS is completely off when you press the button. BUT the TCM still talks to the TCS and will still change how it shifts and such when it detects slippage through the ABS unit. It's typically why automatic owners who disable ABS typically will report the transmission shifting "harder" or it just operating much more aggressively.

 

That's what I've figured :/ I went through all the wires that weren't related to the wheel speed sensors and all of them threw an ABS light, so there isn't any wire you can cut on the ABS unit to fault JUST the TCS. So the other option is going through the ECU but it's not as easy to solder those wires due to the awkward angle and such. Plus, an ABS unit is a bit easier to replace than a whole ECU haha Fun fact though, leaving the ECU disconnected and turning the car on but not starting the engine will throw a TCS fault but not an ABS fault.