SIEMENS MS43 ENGINE MANAGEMENT SYSTEM

 SIEMENS MS43 ENGINE MANAGEMENT SYSTEM

SIEMENS MS43 ENGINE MANAGEMENT SYSTEM

System Description

The KV6 engine is fitted with a Siemens MS43 Engine Management System (EMS), which is an

adaptive system that maintains engine performance at the optimum level throughout the life of

the engine.

The EMS consists of an Engine Control Module (ECM) that uses inputs from engine sensors

and from other vehicle systems to continuously monitor driver demand and the current status of

the engine. From the inputs the ECM calculates the Air Fuel Ratio (AFR) and ignition timing

required to match engine operation with driver demand, then outputs the necessary control

signals to the electric throttle, fuel injectors and ignition coils. The ECM also outputs control

signals to operate the:

• Air Conditioning (A/C) compressor.
• Engine cooling fans.
• Evaporative emissions (EVAP) purge valve and Diagnostic Module for Tank Leakage (DMTL).
• Fuel pump.
• Variable Intake System (VIS).

The ECM also interfaces with the:

• Immobilization ECU, for re-mobilization of the engine fuel supply.
• Cruise control interface ECU, to operate cruise control.
• Electronic Automatic Transmission (EAT) ECU, to assist with control of the gearbox.