Purpose of the System: Notes

The basic function of the Engine Management System is to produce smooth and efficient engine operation over varied driving conditions and engine loads. It also functions to monitor emissions systems and interfaces with other vehicle systems to enhance the driving experience.

The EMS2000 system manages the following functions:

Fig 1: EMS2000 System Function

Courtesy of BMW OF NORTH AMERICA, INC.

Inputs from sensors, switches and monitoring devices are received by the Engine Management system and processed. These inputs include the following:

• Ignition Switch
• Accelerator Pedal Sensor
• Coolant Temperature Sensor
• Knock Sensor
• O2 Sensors
• Transmission Speed Sensor
• EWS
• A/C Pressure Transducer
• Battery
• TMap Sensor
• EDR
• Crankshaft Sensor
• Brake Light Switch
• Oil Temp Sensor
• GIU
• IKE
• Main Relay
• Map Sensor (S Only)
• Camshaft Sensor
• LDP System
• Clutch Switch
• Generator
• ABS/DSC
• MFL

Using these inputs the Engine Management System makes operating decisions and outputs control signals to manage engine, transmission and emission operation. The outputs include:

• Main Relay
• Inertia Switch
• Ignition Coils
• O2 Sensor Heaters
• A/C Compressor
• IKE
• EDR
• Fuel Pump Relay
• LDP System
• Shift Interlock Relay
• Engine Cooling Fan
• EDR Warning LED
• Fuel Injectors
• Purge Valve
• GIU
• OBD II Plug