- 01/25/2017
- 0 Min Read
- By: Jay VanGorden
Why Don't AWD Volvos have a TRACS/STC Switch? (P80)
If you own an AWD S70/V70, chances are it doesn't have a TRACS/STC switch. This switch is located to the left of the sunroof control switch.
The STC system is an upgrade on the TRACS system of 98 and prior cars. In addition to braking individual wheels during a wheelspin event, the newer system is able to cut power to the driveline via the throttle in extreme situations.
The main motivation for fitting an STC switch to my 1999 V70R was to avoid the ‘neutral kick down’ experienced under very hard braking. While driving in my first autocross event I experienced how debilitating this safety feature is to the car's overall performance. Thankfully, the solution to this system's limitations is simply plug and play.
To begin, you’ll need to acquire a STC or TRACS switch, they are different part numbers but both do the same thing when installed in either a 98 or 99/00 vehicle. (STC is 99/00 only) AWD vehicles are pre-wired for an STC/TRACS switch, however there is a blank where the switch goes, as a functioning AWD car shouldn't need to defeat this system in most cases.
Use a trim tool like the one shown to gently pry on the sunroof switch. It shouldn't take much to pop the switch free. Once loose, let it dangle and use a single finger to push out the wiring next to it and blank switch plate from the dash from behind. Use caution here as the plastics can be brittle as well as sharp.
With the hole open and harness captured, plug in the switch and slide it into the dash. At this point it would be worth testing the functionality of the switch. With the vehicle's engine on, press the switch for a moment and you should see a yellow triangle appear in the dash. This means that the STC/TRACS functions are defeated.
Reinstall the switches and you're done, simple as that. For the most part the switch is invisible behind the stalk and steering wheel. Having the ability to turn the system off can allow for some additional fun on both the track and in the snow.
