I don't know about the other members on here but I am definitely not a fan of ESP in our cars. So I have been working with a friend who is a former technician on Crossfires to try to disable it thru the ESP module. I have found out a little bit so far, It is a two part sensor not two sensors. I have diagrams to the module's wiring but have not found a place in the grid to place a voltage clamp or cut off switch without throwing a code. Here is the info i have on the ESP module...
OPERATION
The Yaw Rate/Lateral Acceleration Sensor is a combined sensor.

The yaw rate portion of the sensor is used to measure the yaw rate of the vehicle. When the vehicle turns, acceleration forces are produced which cause torsion. This torsion change within the sensor is proportional of the yaw rate of the vehicle.

The lateral acceleration portion of the sensor measures the amount of lateral acceleration during cornering. This sensor uses a spring/mass type element to measure the amount of lateral acceleration. The lateral acceleration that occurs during cornering causes the spring/mass element to move from its normal position to a position corresponding to the magnitude of the lateral acceleration. Every change in the spring/mass element position changes the output voltage of the sensor.

ESP YAW RATE/LATERAL ACCELERATION SENSOR - 6 WAY CAV CIRCUIT FUNCTION PIN OUT
1 20DG S-CAN (-) (DIAG ONLY)
2 20WT S-CAN (+) (DIAG ONLY)
3 20RD/DG 5 VOLT SUPPLY
4 - -
5 20BR SENSOR GROUND
6 20BL/YL STEERING ANGLE SENSOR SIGNAL ***


I'm not a electrician so I don't know too much in this area. My friend suggested putting a volt meter on the wire going to the steering wheel angle sensor when the car is at rest and ESP is not engaged. Then clamp it to not exceed that amount of voltage. He said it seems like the only way. If I put a cut off at the relay switch i will throw a code for the ESP, transmission control and shifter lever module. After I get my ECU back tomorrow I will try it out and report back with my findings. If anyone has any ideas or can see something in the diagram i cant please help out.

 

Where is the yaw/acceleration sensor located?
Also the steering angle sensor?

 

The problem with clamping the steering angle sensor is that the value of the steering angle sensor starts all the way at full left and ends at full right which is why when you disconnect the battery or reset something with the module like pulling the ECU or BCM, the car needs to see a full sweep of the steering wheel from left to right to "learn" what those values are and then it needs to see forward movement to "calibrate" the sensor for any variances it may see with forward movement. If you just clamp the sensor, all the steering input to the left or to the right depending on how the sensor is setup will still register. Also, if the vehicle is seeing lateral movement and the steering wheel angle does not correspond to what would be acceptable, the ESP will try to bring the vehicle back "under control" even though you know what you are trying to do with it. The only way to actually get this to function properly is to do it the way Woody did and sever communication on the CAN bus from the YAW sensor to the rest of the car. Even removing power from the module will not completely disable is as I believe that it is getting current through the steering angle sensor and the ground via the mounting of the module to the chassis. I have tried the aforementioned method and it did not completely disable the ESP so voltage was getting in there somehow.

Hope this helps you out.

 

Is there a thread on the way Woody did it? The tech said the CAN is for diagnostics only, so severing it would do nothing to shut it off.
I thought that if i clamped the voltage going to the steering wheel angle sensor, since the ESP engages off voltage increase, it might work. I kind of only want the lateral part of the sensor disabled, I would still like it to save my *** if I'm sliding out of control. Like taking my throttle away would do much though.
The sensor is located in the center console behind the shifter. I will get a pic asap

 

Clamped the steering angle at 5.75v, I dont know how it was pushing out that much voltage when it only had a 5v supply but i checked it and double checked it. After clamping it, I test drove but ESP still engaged. Got fustrated with it so I just servered the power to the module and test drove again, still engages. I dont know how this is happening if there is no power, thought maybe there is another module. If that is the case, does anyone know where it is located?

 

HAA, I'm a idiot! I just read your post rcompart... Thanks for the info, Do i need to cut power and cut the CAN feed?
I completely unplugged the module and it still engages... please help!