Electronic Stability Program Control Unit, Basic Function - GF42.45-P-9890A
Model all (CAR)
Show on model 293
Fig 1: Regenerative Braking System/Electronic Stability Program Control Unit Components Location - Model 253; Shown on model 293
Shown on model 177
Overview
This document contains information on:
- Location
- Function
Location
The ESP® control unit or regenerative brake system control unit is located 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 engine compartment between the firewall and a heat shield.
Function
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