2470 DME Control Module

Note: With all DME systems, the engine must run for several minutes before the engine control module can relearn the idle speed and mixture adaptation values.

Problem
- After disconnection of the power supply, the idle speed might change or fluctuate briefly until the idle speed positioner (M 5.2) or the throttle adjusting unit (ME 7.2) is readapted.
- The mixture adaptation is also lost.

Remedy
After the battery is connected, With the DME ME 7.2, it is necessary to carry out a learning and adaptation routine as described below:
1. Switch the ignition on for 1 minute without starting the engine. Do not actuate accelerator pedal.
2. Switch off ignition for at least 10 seconds.
This completes the adaptation of the throttle adjusting unit.