System Overview

Digital Motor Electronics (DME M1.1/ M1.3, 6-cylinder M 20 and M 30):

NOTES: The following descripton refers to the digital motor electronics DME M1.1 and M1.3 for the 6-cylinder engines M 20 (2.5 L) and M30 (3.5 L).

PURPOSE
The Digital Motor Electronic system (DME) 1.3, provides precise control of fuel injection and ignition systems to ensure optimum performance and strict emissions compliance.

OPERATION
Various engine sensors and other systems (i.e.. air conditioning, auto transmission etc.) supply the DME control unit with operating information. The DME control unit processes this information and sends control signals to adjust injector pulse width, ignition timing and other important systems and components.

The DME system assumes functions listed below:
^ Injection control
^ Ignition timing control
^ Closing angle control
^ Cold start control
^ Engine speed control
^ Idle speed control
^ Acceleration enrichment
^ Dynamic torque deceleration fuel cut-out
^ Adaptive emission (lambda) control
^ Adaptive fuel evaporation control
^ Adaptive idle speed control
^ Characteristic map switchover for EH transmission
^ Limited (emergency) operation control
^ Relay control
^ A/C compressor cut-out
^ Self-diagnosis with defect code storage

The system can also operate in conjunction with other systems such as:
^ Electronic transmission control EGS
^ Electronic throttle control EML
^ Automatic stability control ASC
^ Engine drag torque control MSR
^ Instrument cluster
^ Antitheft system DWA
^ On-board computer BC

Input Signals:

Input Signals:

Input Signals:

Output Signals:

Output Signals:

Output Signals: