Cruise Control

Cruise control is operated with switch on turn signal lever. The cruise control switch has 3 outputs to ECM. When cruise control switch is in ON position, a message is sent to the ECM. ECM will than send a message, along the bus line, to the main instrument unit to turn on CRUISE light.

When the SET button is pressed, ECM will store current speed in its memory only when all conditions for setting the cruise control have been met. The ECM will then read through a table containing rolling resistance (on level ground and various speed), and set a drive wheel torque. At this point the drive wheel torque is converted to requested engine torque.

The requested engine torque is converted to requested air mass/combustion and constitutes cruise control input signal to air mass control. ECM is programmed for cruise control from factory, even if vehicle is not equipped with cruise control.