Torque request for wheel spin
WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.
If one of the driving wheels exceeds the permitted wheel spin limit, the TC/ABS control module will request a lower engine torque from the Trionic control module. Trionic governs principally the throttle in the throttle body in order to reduce the torque rapidly. After this, the boost pressure may be reduced if necessary.