Component Description For Electronic Stability Program Control Unit - GF42.45-P-5119GN
MODEL 166 (except 166.063)
as of model year 2016
MODEL 292
Shown on model 292 with engine 278
Location
The Electronic Stability Program control unit is located on the traction system hydraulic unit in the front left of the engine compartment.
Tasks
The Electronic Stability Program control unit contains the control for the following systems:
- Electronic Stability Program (ESP®)
- Electronic brake force distribution (EBD)
- Emission test, roller dynamometer mode
- Torque Vectoring Brake
- Anti-lock braking system (ABS)
- Acceleration skid control (ASR), electronic traction system (ETS)
- Brake Assist System (BAS)
- Brake Assist System PLUS (BAS PLUS) (with CODE 23P (Driving Assistance package Plus))
- Hill Start Assist
- Speed control during downhill driving
- Off-road program
- 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
- ESP® trailer stabilization (with CODE 550 (Trailer hitch))
- Standstill control (SSC)
- Steer Assist
- Crosswind Assist
- Tire pressure loss warning (RDW) (with code 477 (Tire pressure loss warning))
- PRE-SAFE® system
- Cruise control (except CODE 23P (Driving Assistance package Plus))
In vehicles (with CODE 23P (Driving Assistance package 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 signals
- Evaluation of input factors
- Actuation of components
- 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 (A7/3)
Chassis CAN 1
The Electronic Stability Program control unit is a subscriber of chassis CAN 1 and communicates with the following control units:
- Instrument cluster (A1)
- AIRmatic control unit (N51/3) (with CODE 489 (AIRmatic))
- CDI control unit (N3/9) (with diesel engine)
- ME-SFI control unit (N3/10) (with gasoline engine)
- Supplemental restraint system control unit (N2/10)
- SAM control unit (N10)
- Electrical power steering control unit (N68)
- Left front door control unit (N69/1)
- Right front door control unit (N69/2)
- Electronic ignition lock control unit (N73)
- Steering column tube module control unit (N80)
- Chassis gateway control unit (N93/7)
- Electric parking brake control unit (N128)
- Radar sensors control unit (with CODE 23P (Driving assistance package Plus))
- Fully integrated transmission control unit (Y3/8n4)
- Transfer case control unit (N15/7) (with CODE 430 (On & Off-road package)) (except model 292)
- Trailer recognition control unit (N28/1) (with CODE 550 (Trailer hitch))
- Parking system control unit (N62) (with CODE 235 (Active Parking Assist))
- Lower control panel control unit (N72)
- Upper control panel control unit (N72/1)
- Off-road control panel control unit (N72/3)
- Transmission mode control panel (N72/4)
Vehicle dynamics CAN
The signals of the following components are read-in via the vehicle dynamics CAN:
- Turn rate sensor, lateral and longitudinal acceleration (B24/15)
Evaluation of input factors
Reading in of signals
The input factors are read in via the following connections:
- Direct line
- Chassis CAN 1 (CAN E1)
- Vehicle dynamics CAN (CAN H)
Direct line
The signals from the following components are read via direct lines:
- Terminal 30
- Circuit 31
- Brake vacuum sensor (B64/1)
The input factors that have been read in are evaluated by the integrated microprocessor whereupon the required 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
| Designation | Unit | Values | Tolerance range | Remarks |
|---|---|---|---|---|
| Electronic Stability Program control unit | ||||
| Voltage supply | V | 13, 8 | ||
| Lower voltage limits | V | 9 |
|
|
| 9.5 | - Switch-on threshold | |||
| Upper voltage limits | V | 16 |
|
|
| 16, 5 |
|
|||
| Power consumption | mA | < 400 | Standby | |
| A | 40 | Action | ||
| μA | < 100 | No-load current | ||
| Reverse polarity protection | - | - | - | Yes |
| Special features | - | - | - | All relevant parameters for changing over functions are coded per software calibration number (SCN). |
| Flash capability/coding capability | - | - | - | Yes/yes |
| Yaw rate sensor for lateral and longitudinal acceleration | ||||
| Model | - | - | - | Sensor cluster |
| Voltage supply | - | - | - | Terminal 30 |
| Brake vacuum sensor | ||||
| Model | - | - | - | Pressure sensor |
| Voltage supply | V | 5 | - | Is for 3.3 V input connection in Electronic Stability Program control unit |
| Measuring range | mbar | 50...1000 | ± 16 | |
| Output signal | V | 0, 4...4, 5 | - | Signal proportional to supply voltage (ratiometric signal), dropping characteristic with decreasing pressure differential |
| Left front axle rpm sensor; right front axle rpm sensor; left rear axle rpm sensor; right rear axle rpm sensor | ||||
| Model | - | - | - | Digital sensor |
| Voltage supply | - | - | - | Terminal 30 |
| Frequency | Hz | 0...5000 | - | |
| Stop lamp switch | ||||
| Model | - | - | - | Digital sensor |
| Voltage supply | - | - | - | Circuit15R |
| Wiring diagram for Adaptive Brake (ABR) | PE42.47-P-2000-97NBA |