(Component Description For Electronic Stability Program Control Unit - GF42.45-P-5119GR)
MODEL 166
up to model year 2016
Illustrated on model 166.0
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)
- Anti-lock braking system (ABS)
- Acceleration skid control (ASR), electronic traction system (ETS)
- Brake Assist System (BAS)
- Brake Assist System PLUS (BAS PLUS)
- ESP® trailer stabilization
- Hill Start Assist
- Speed control during downhill driving
- Off-road program
- Dry braking
- Precharging, depending on accelerator pedal actuation
- HOLD function
- Flashing adaptive brake lights
- Standstill check
- Steer Assist
- Crosswind Assist
- Tire pressure loss warning (RDW) (except CODE 475 (Tire pressure monitor (premium)))
- Automatic lane recognition (ALR [AFE]) (with CODE 476 (Automatic lane recognition))
- Variable speed limiter (except CODE 233 (DISTRONIC PLUS)), with CODE 237 (Active Blind Spot Assist), with CODE 238 (Active Lane Keeping Assist), except CODE 494 (USA version) and except CODE 460 (Canada version)
- Cruise control (except CODE 233 (DISTRONIC PLUS), except CODE 237 (Active Blind Spot Assist), except CODE 238 (Active Lane Keeping Assist) and with CODE 440 (Cruise control)
The variable speed limiter and the cruise control are integrated in the video and radar sensor system control unit (N62/2).
The Electronic Stability Program control unit has the following tasks:
- Reading in of signals
- Evaluation of input factors
- Actuation of components
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:
- Circuit 30
- Circuit 31
- Brake vacuum sensor (B64/1) (with CODE B03 (ECO start/stop function))
- 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 1
The Electronic Stability Program control unit is a subscriber of chassis CAN 1 and communicates with the following control units:
- AIRMATIC control unit (N51/3) (with CODE 489 (AIRmatic (air suspension with level adjustment and adaptive damping system ADS)))
- Supplemental restraint system control unit (N2/10)
- CDI control unit (with diesel engine) (N3/9)
- ME-SFI [ME] control unit (with gasoline engine) (N3/10)
- SAM control unit (N10)
- Transfer case control unit (N15/7) (with CODE 430 (On-road & off-road package))
- Electronic Stability Program control unit (N30/4)
- Electrical power steering control unit (N68)
- Left front door control unit (N69/1)
- Right front door control unit (N69/2)
- Lower control panel control unit (N72)
- Upper control panel control unit (N72/1)
- Offroad control panel control unit (N72/3) (with CODE 430 (On & off-road package))
- Electronic ignition lock control unit (N73)
- Steering column tube module control unit (N80)
- Electric parking brake control unit (N128)
- Fully integrated transmission control unit (Y3/8n4)
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
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
| Technical data Designation | Unit | Values | Tolerance range | Remarks |
|---|---|---|---|---|
| Electronic Stability Program control unit | ||||
| Voltage supply | V | 13.8 | ||
| Lower voltage limits | V | 9 |
|
|
| 9.5 |
|
|||
| 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 | - | - | - | Circuit 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 | - | - | - | Circuit 30 |
| Frequency | Hz | 0...5000 | - | |
| Stop lamp switch | ||||
| Model | - | - | - | Digital sensor |
| Voltage supply | - | - | - | Circuit15R |
| Wiring diagram for Adaptive Brake (ABR) | PE42.47-P-2000-97NAA |