System Overview

Digital Motor Electronics (DME M1.2, 6-cylinder S 38):

NOTES: The following description refers to the digital motor electronics DME M1.2 for the 6-cyiinder engine S 38 (3.6 L).

DME System Diagram:

PURPOSE
The Digital Motor Electronic system (DME) 1.2, 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, instrument cluster 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
^ Dwell angle control
^ Cold start control
^ Idle speed control
^ Acceleration enrichment
^ Dynamic torque deceleration fuel cut-out
^ Adaptive emission (lambda) control
^ Adaptive fuel evaporation control
^ Adaptive idle speed control
^ Drive-away protection
^ Limited (emergency) operation control
^ Relay control
^ Self-diagnosis with defect code storage

The system can also operate in conjunction with other systems such as:
^ Instrument cluster
^ Antitheft system DWA
^ On-board computer BC

Input Signals:

Input Signals:

Input Signals:

Output Signals:

Output Signals:

Abbreviations:

Abbreviations: