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

GF42.45-P-5119FL Component description for the Electronic Stability Program control unit

Component Identification:

Location
The Electronic Stability Program control unit is located on the traction system hydraulic unit in the front left of the engine compartment.

Task
The Electronic Stability Program control unit contains the control for the following systems:
^ Adaptive Brake (ABR)
^ Speed-sensitive power steering (PML) (with code (213) speed-sensitive power steering)
^ Tire pressure loss warning (RDW) (except code (475) Tire pressure monitor (Premium))
^ PRE-SAFE(R) system
^ ALR (AFE) (with code (476) Automatic Lane recognition
^ Variable speed limiter (except code (233) DISTRONIC PLUS, except code (494) USA version and except code (460) Canada version)
^ CC (TPM) (except code (233) DISTRONIC PLUS and with code (440) CC)

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 has the following tasks:
^ Reading in of sensors, pickups and signals
^ Evaluating input factors

Reading in of sensors, pickups and signals
The input factors are read in with the following connections:
^ Direct line
^ Chassis CAN (CAN E)
^ Vehicle dynamics CAN (CAN H)

Direct line
The following signals are read in via a direct line:

- Circuit 30
- Circuit 31
- Brake light 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 is a subscriber to the chassis CAN. It communicates for instance with the following control unit:

- AIRmatic control unit (N51/3), with code (489) Airmatic (semi-active air suspension)

Vehicle dynamics CAN
The data from the following component are read in via the vehicle dynamics CAN:

- Yaw rate sensor for lateral and longitudinal acceleration (B24/15)

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 a direct line:

- Rear SAM control unit with fuse and relay module (N10/2) (brake light actuation)
- Speed-sensitive power steering solenoid valve (Y10) (with code (213) Speed-sensitive power steering)
- Power steering pump quantity control valve (Y10/1)
- Yaw rate sensor for lateral and longitudinal acceleration (B24/15) (power supply)
- Front SAM control unit with fuse and relay module (N10/1) (standstill coordinator status)
- Navigation processor (N41/1) (vehicle speed signal from left front axle rpm sensor), with code (965) Electric preinstallation of rental vehicle, with code (830) China-version or with code (835) South Korea version