Electronic Stability Program Control Unit, Component Description - GF42.45-P-5119RR

Model 190 

Shown on model 190 

Location 

The Electronic Stability Program control unit is located in the engine compartment, at the left next to the BAS brake booster (A7/7) at the traction system hydraulic unit.

Tasks 

The Electronic Stability Program control unit contains the control for the following systems:

• Electronic Stability Program (ESP®)
• Electronic brake force distribution (EBD)
• Anti-lock braking system (ABS)
• Acceleration skid control (ASR), electronic traction system (ETS)
• Brake Assist System (BAS)
• Brake Assist System PLUS (BAS PLUS)
• Hill Start Assist
• Adaptive brake lights, flashing (except with CODE 494 (USA version))
• Dry braking
• Precharging, depending on accelerator pedal actuation
• Precharging, depending on lateral acceleration
• HOLD function
• PRE-SAFE® system
• Standstill control (SSC)

The Electronic Stability Program control unit has the following tasks:

• Reading in of signals 
• Evaluation of input factors 
• Actuation of components 

Reading in of signals 

The input factors are read in via the following connections:

• Direct line 
• Chassis CAN 1 (CAN E1) 

Direct line 

The following signals are read in via direct lines:

Chassis CAN 1 (CAN E1) 

The Electronic Stability Program control unit is a subscriber of chassis CAN 1 and communicates with the following control units:

• Instrument cluster (A1)
• Supplemental restraint system control unit (N2/10)
• ME-SFI control unit (N3/10)
• Front SAM control unit with fuse and relay module (N10/1)
• Rear SAM control unit with fuse and relay module (N10/2)
• Left door control unit (N69/1)
• Right door control unit (N69/2)
• Electronic ignition lock control unit (N73)
• Steering column tube module control unit (N80)
• AMG gateway control unit (N93/9)
• Powertrain control unit (N127)
• Electric parking brake control unit (N128)

Evaluation of input factors 

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

Actuation of components 

Components are actuated with the following line:

• Direct line 

Direct line 

The following components are actuated via direct lines:

• Traction system hydraulic unit
• Terminal 30
• Terminal 31
• Brake lights switch (S9/1)
• 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)
• Traction system hydraulic unit
• Brake vacuum sensor (B64/1)

Wiring diagram for electronic stability program (ESP) control unit

PE42.45-P-2101-97HBA