GF42.45-P-5119FQ Component Description For Electronic Stability Program Control Unit

GF42.45-P-5119FQ Component Description For Electronic Stability Program Control Unit
MODEL 218





Illustrated on model 218.3

A7/3 Traction system hydraulic unit
N30/4 Electronic Stability Program control unit (except code (233) DISTRONIC PLUS)
N30/7 Premium Electronic Stability Program control unit (vehicles with code (233) DISTRONIC PLUS)

Location
The Electronic Stability Program control unit (except code (233) DISTRONIC PLUS) or Electronic Stability Program Premium control unit (with code (233) DISTRONIC PLUS) is located in the left front of the engine compartment on the traction system hydraulic unit.

Task
The Electronic Stability Program control unit (except code (233) DISTRONIC PLUS) or the Electronic Stability Program Premium control unit (with code (233) DISTRONIC PLUS) includes the controls for the following systems:
- Adaptive Brake (ABR)
- Tire pressure loss warning (RDW) (except code (475) Tire pressure monitor (premium))
- PRE-SAFE(R) system
- Variable speed limiter (except code (233) DISTRONIC PLUS, except code (494) USA version and except code (460) Canada version)
- Cruise control (except code (233) DISTRONIC PLUS)
In vehicles with code (233) DISTRONIC PLUS, the variable speed limiter and the cruise control are integrated in the radar sensors control unit (N62/1).
The Electronic Stability Program control unit (except code (233) DISTRONIC PLUS) or the Electronic Stability Program Premium control unit (with code (233) DISTRONIC PLUS) performs the following tasks:
^ Reading in of sensors, pickups and signals
^ Evaluating input factors
^ Actuation of components

Reading in of sensors, pickups 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 following signals are read in via direct lines:
- Circuit 30
- Circuit 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)

Chassis CAN
The Electronic Stability Program control unit (except code (233) DISTRONIC PLUS) or the Electronic Stability Program Premium control unit (with code (233) DISTRONIC PLUS) is a subscriber on the chassis CAN: It communicates for instance with the following control unit:
- Instrument cluster (A1)

Vehicle dynamics CAN
Signals are read in via the chassis CAN from the following components:
- Yaw rate sensor for lateral and longitudinal acceleration (B24/15)
- Radar sensors control unit (with code (233) DISTRONIC PLUS)
- DISTRONIC electric controller unit (A89) (with code (233) DISTRONIC PLUS)

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:
- Rear SAM control unit with fuse and relay module (N10/2) (brake light actuation)
- Yaw rate sensor for lateral and longitudinal acceleration (power supply)

Variants
There are 2 ABR variants in use:
^ ABR base system (except code (233) DISTRONIC PLUS)
^ ABR premium system (with code (233) DISTRONIC PLUS)