System Operation: ACCEL
WARNING: This page is about a different car, the 2000 Lexus SC 400, 2000 Lexus SC 300, 2000 Lexus LS 400, 2000 Lexus GS 400, and 2000 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
While cruising at set speed, move lever upward (RES/ACC). Vehicle speed should gradually increase. Release lever when new desired speed is attained. When difference between actual speed and set speed is less than 3 MPH, momentarily move lever upward to increase set speed in one MPH increments (tap up function).