Engine Control Module

The Engine Control Module monitors the Drive Mode Select Switch as an input. The Engine Control Module applies 5 volts to the switch resistor ladder and monitors the signal voltage from the switch. As the switch is rotated to the left or right, current flows through different resistors and the voltage monitored at the Engine Control Module also changes. The Engine Control Module uses this voltage change to determine if the rotary knob is in the at rest position or has been turned left/right. The Engine Control Module will change the drive mode based on this input.

When a drive mode change is requested by the drive through the Drive Mode Select Switch, the Engine Control Module will broadcast a message to all modules indicating the requested drive mode. Control modules that are involved in changing their operation based on differing drive modes will then change their operating values. The Engine Control Module may also change operating values based on the drive mode, such as a more or less aggressive throttle profile.