Throttle Switch: Adjusting
WARNING: This page is about a different car, the 1991 Volvo 940, 1991 Volvo 740, and 1991 Volvo 240. However, it is still accessible from the selected car via links, so may be relevant.
Ensure throttle valve is closed. Loosen TPS retaining screws. Turn TPS switch clockwise slightly. Turn TPS switch back again until a click is heard. Tighten retaining screws. Recheck setting. Open throttle slightly, a click should be heard. This indicates that switch is activating.