Engine Management

Siemens Engine Management System












This new generation Siemens system is designated as MS42.0.

Siemens MS42.0 is a completely new developed engine management system to meet the needs of Low Emission Vehicle (LEV) compliancy and continuing with present systems is also OBD II compliant. This system also includes control of the Motor-driven Throttle Valve (MDK).

The ECM uses a PC-board single- processor control unit in the new SKE housing. Mounted in new E-Box location (next to brake master cylinder). The MS 42.0 ECM is flash programmable as seen with previous systems.

ECM hardware includes:

Modular plug connectors featuring 5 connectors in the SKE housing with 134 pins.
- Connector 1 = Supply voltages and grounds
- Connector 2 = Peripheral signals (oxygen sensors, CAN, etc.)
- Connector 3 = Engine signals
- Connector 4 = Vehicle signals
- Connector 5 = Ignition signals

Special features:
- Flash EPROM which is adaptable to several M52 LEV engines and has the capability to be programmed up to 13 times
- Once a control unit is installed and coded to a vehicle it cannot be swapped with another vehicle for diagnosing or replacement (because of EWS 3.3). A new ECM must be installed if necessary.