Powertrain Control Unit, Basic Function - GF54.21-S-9894A

Engine All (Light transporter) 

Courtesy of MERCEDES-BENZ USA

Example illustration of powertrain control unit 

Overview 

This document contains information on:

• General 
• Function 

General 

The powertrain control unit (1) serves as an interface (gateway) between the combustion engine control unit, the ESP® control unit and the connected bus systems.

Function 

The powertrain control unit (1) primarily intervenes in the following functions:

• Engine management
• Heat management

In order to carry out these functions, the powertrain control unit (1) primarily processes the following input factors:

• Engine management ON (terminal 87)
• Charge air cooler coolant temperature
• Fan motor status
• Accelerator pedal sensor
• Start/stop button
• With manual transmission: Clutch travel sensor
• With manual transmission: Main shifter shaft position sensor

The powertrain control unit (1) processes these input factors and controls the following actuators depending on the engine variants:

• Exhaust gas flap controller
• Fan motor
• Radiator trim flap actuator motor
• Transmission oil cooling coolant circulation pump
• Charge air cooler circulation pump
• Coolant pump switchover valve

	Additional basic functions
	Charge air cooler coolant temperature sensor, basic function	Engine 608, 654	GF07.04-S-2007A
	Accelerator pedal sensor, basic function		GF30.20-S-2000A
	Detailed information
	Powertrain control unit, detailed information	Engine all in model 447 with code XM7 (MOPF II)	GF54.21-S-0015A
	Component descriptions
	Drivetrain control unit, component description	Engine all in model 447 with code XM7 (MOPF II)	GF54.21-S-2141A