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

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Purpose of the System: Notes

Use the Manual With the Right Hardware

When to See a Mechanic

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