Engine Control Module (ECM) (4/46) [2017-2022]: Description

The Engine Control Module (ECM) controls engine functions such as:

• Ignition regulation.
• Throttle control.
• Lubrication and oil system.
• Fuel system.
• Inlet and exhaust system.
• Engine cooling.
• Gearshift timing.

The Engine Control Module (ECM) contains:

• A DC/DC-converter that increases the battery voltage from 12 V to approximately 40 - 50 V. A capacitor that stores the voltage required to control components that require voltage greater than 12V.
• Four low-side drivers (one for each fuel injector) that close the circuit to the fuel injector.
• Two high-side drivers (two fuel injectors share one high-side driver) that power supply the fuel injectors.
• H-bridges that are used to switch the polarity of an output. This is used to control electric motors (such as the throttle unit) that changes direction when the polarity is switched.
• An integrated sensor that registers the ambient air pressure.
• An integrated temperature sensor.

Capacity:

• Central Processing Unit (CPU) 200 MHz: 32 bit
• Random Access Memory (RAM): 256 kB
• Electrically Erasable Programmable Read-Only Memory (EEPROM) flash-memory: 128 kB

The Engine Control Modules (ECM) for the diesel engine and the gasoline engines are identical in terms of:

• External geometry.
• Connector.
• Circuit board.
• The software that controls when the automatic transmission normal shifts should occur, based on factors such as accelerator pedal position, drive mode, operating conditions, and when the lock-up function must be activated.