Electronic Stability Program control unit, component description - GF42.45-P-5119CE

MODEL 204.0/2 as of model year 2009 /YoM 08

MODEL 204.0/2 as of model year 2012 /YoM 11 model refinement package

MODEL 204.3

MODEL 204.9

Implementation dates and validities for Electronic Stability Program control unit (N30/4) (ESP) (Basis variant, without code (233) DISTRONIC PLUS) and except model 204.077/277/377) or Electronic Stability Program control unit (Premium variant, with code (233) DISTRONIC PLUS) or model 204.077/277/377)

Model 204.0/2 as of 1.3.2011
Model 204.3 as of 1.6.2011

Up to the 28.2.2011 or 31.5.2011 and as of 1.6.2011 (model 204.9) only the Basis variant (without code (233) DISTRONIC PLUS) of the ESP control unit shall be used.

Fig 1: Identifying Electronic Stability Program Control Unit

Courtesy of MERCEDES-BENZ USA

Location

The Electronic Stability Program control unit is in the front left of the engine compartment.

Task

The Electronic Stability Program control unit has the following tasks:

Control of systems
Reading in of sensors and signals
Evaluation of input factors
Actuation of components

Control of systems

The Electronic Stability Program control unit controls the following systems:

Adaptive Brake (ABR)
Limiter, except code (494) USA version or except code (460) Canada version
Speed-sensitive power steering (SPS), with code (213) Speed-sensitive power steering
Tire pressure loss warning, except code (470) Tire pressure monitor (basis) or except code (475) Tire pressure monitor (Premium)
PRE-SAFE®, with code (299) PRE-SAFE
Cruise control, with code (440) Cruise control

Reading in of sensors and signals

The input factors are read in via the following connections:

Direct line
Chassis CAN (CAN E)
Vehicle dynamics CAN (CAN H)

Direct line

The signals from the following components are read via a direct line:

Brake lights switch (S9/1)
Brake vacuum sensor (B64/1) (with code (B03) ECO start/stop function)
Left front axle rpm sensor (L6/1)
Right front axle rpm sensor (L6/2)
Left rear axle rpm sensor (L6/3)
Right rear axle rpm sensor (L6/4)

Chassis CAN

The signals are read in by the Electronic Stability Program control unit via the chassis CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Vehicle dynamics CAN

The signals are read in by the Electronic Stability Program control unit via the vehicle dynamics CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components

Components are actuated via the following lines:

Direct line
Chassis CAN
Vehicle dynamics CAN

Direct line

The following components are actuated via a direct line:

Brake light actuation via rear SAM control unit with fuse and relay module (N10/2)
Speed-sensitive power steering solenoid valve (Y10), with code (213) Speed-sensitive power steering
Power steering pump quantity control valve (Y10/1), on model 204.001/002/003/006/025/044/045/047/048/049/065/092/201/202/203/225/245/247/248/249/292/with code (213) speed-sensitive power steering
Power steering pump quantity control valve, as of 1.9.08 on model 204.041/046/052/054/056/241/246/252/254/256/302/303/347/349/357 with code (213) Speed-sensitive power steering
Power supply of yaw rate sensor for lateral and longitudinal acceleration (B24/15)

Chassis CAN

The components are actuated by the Electronic Stability Program control unit via the chassis CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Vehicle dynamics CAN

The components are actuated by the Electronic Stability Program control unit via the vehicle dynamics CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

	Wiring diagram for Adaptive Brake (ABR) 204.0/2 up to 02/11 204.9 up to 05/11		PE42.47-P-2000-97FAA
	Wiring diagram for Adaptive Brake (ABR) 204.0/2 as of 02/11 204.9 As of 06/11		PE42.47-P-2000-97FAB