Idle/Throttle Speed Control Unit: Description and Operation

The MDK control function has been integrated into the ECM. The purpose is for precision intake air control, OBD II compliant for fault monitoring, ASC/MSR control, and cruise control. This integration reduces extra control modules, wiring, and sensors.

The new engine throttle valve (MDK) differs from the familiar EML in the following points:
- The accelerator pedal potentiometer (PWG) is now integrated in the MDK housing.
- A throttle cable is used to actuate the throttle potentiometers and also serves as a backup to open the throttle plate (full control) if the MDK system is in failsafe.