What is the TEMS and its main functions?
TEMS stands for the Toyota Electronically Modulated Suspension, controlling spring rates and damping. The variable spring rates are achieved by changing air pressure in the front and rear compressed air suspension units and the damping is altered by switching between two (Soarers) or three (Celsiors) damping modes in shock absorbers. The electronic part comes into play when these two variables are modulated on-the-go, depending on many conditions. Functions like “anti-squating” on acceleration and “anti-dive” on braking are part of the suspension control program, as well as automatic lowering of high ride height and firming of damping with increased speed. Limited room does not allow me to elaborate on details but the TEMS is quite a sophisticated system. One example is the steering wheel angle change relative to road speed having effect on the suspenion in order to maintain safe roadholding.
