Electronic Stability Program Control Unit, Basic Function - GF42.45-P-9890A

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MODEL ALL (CAR)

Shown on model 177.0

Overview

This document contains information on:

Location
Task

Location

The Electronic Stability Program control unit is located at the left in the engine compartment, next to the BAS brake booster on the traction system hydraulic unit. The traction system hydraulic unit is located in the left front of the engine compartment between the firewall and a heat shield.

Task

The powertrain control unit primarily intervenes in the following functions:

Brake and traction system (ADAPTIVE BRAKE)
Electric parking brake
Electronic Stability Program (ESP®)
Electronic brake force distribution (EBD)
Anti-lock braking system (ABS)
Traction control
Brake Assist System (BAS)
Hill Start Assist
Flash Adaptive Brake Lights
Dry braking
Precharge brake system
HOLD function
Stabilize trailer
PRE-SAFE® system
Standstill control (SSC)
Tire pressure loss warning (RDW)

In order to carry out these functions, the Electronic Stability Program control unit primarily processes the following input factors:

Ignition ON (circuit 15)
Circuit 30t
Circuit 31
Stop lamp switch
Left front axle rpm sensor
Right front axle rpm sensor
Left rear axle rpm sensor
Right rear axle rpm sensor
Accelerator pedal sensor
Brake vacuum sensor
Exterior lights and electric parking brake switch group
With manual transmission: Main shifter shaft position sensor

The Electronic Stability Program control unit processes these input factors and primarily transmits the following actuations:

Supplemental restraint system (SRS) control unit
Electrical ignition lock control unit
Drivetrain control unit
Brake pedal signal
Left electric parking brake actuator motor
Right electric parking brake actuator motor