I found this the other day, I have no idea if it works with our car though..

http://autospeed.com.au/cms/title_Us...1/article.html



It’s easy to think of relays as being suitable for just simple car modifications, but that’s not always the case.
This circuit shows the use of two relays that deactivate traction control without affecting ABS or stability control. The system works by connecting the un-driven wheel ABS sensor outputs to the driven wheel ECU inputs, so that the ECU cannot see a speed difference between the undriven and driven wheels. The modification is automatically switched off whenever the brakes are applied, or by a manual on/off switch. This diagram shows only half of the system - the complete the system just mirror-images the wiring for the other side of the car.
The total cost of the modification was well under AUD$30 – relays are cheap! For more on this approach, see Modifying Electronic Car Handling Systems, Part 3