Monitor Description
WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
The ECM concludes that there is a malfunction in the ETCS when the throttle valve remains at a fixed angle despite a high drive current from the ECM. The ECM will illuminate the MIL and set a DTC. To activate the monitor, start the engine and fully depress/fully release the accelerator pedal quickly (fully open/fully close the throttle valve).