Component description for regenerative braking system control unit - GF42.22-P-1100GQH
MODEL 164.195
Phantom view of vehicle from left
Location
The regenerative braking system control unit is located on the hydraulic unit traction system in the left front of the engine compartment.
Task
General
The regenerative braking system is a modular designed brake and vehicle dynamics control system (in case of errors only affected functions are switched off). The regenerative braking system is a further development of the Electronic Stability Program (ESP) and also contains the ESP functions.
Flashing
The regenerative braking system control unit is flashable i.e. the complete software in the control unit can be updated (replaced). The software required to update the control units is stored on the STAR DIAGNOSIS DAS Update DVD.
CAN data bus
The regenerative braking system control unit is connected through the engine compartment CAN (CAN C) and the vehicle dynamics CAN (CAN H) to the vehicle's CAN network and exchanges data with other control units.
Input and output signals
The following input signals are evaluated by the regenerative braking system control unit and the corresponding output signals issued:
- Direct input signals
- Direct output signals
- CAN input signals
- CAN output signals
Direct input signals
- Terminal 30
- Terminal 87
- Circuit 31
- BAS diaphragm travel sensor (A7/7b1)
- Vacuum sensor (A7/7b3)
- Brake pressure simulator valve pressure sensor (B18/5)
- Pedal angle sensor (B37/1)
- Left front rpm sensor (L6/1)
- Right front rpm sensor (L6/2)
- Left rear rpm sensor (L6/3)
- Right rear rpm sensor (L6/4)
- Hybrid brake light switch (S9/3)
- Vacuum pump relay (+) (K109)
Direct output signals
- Traction system hydraulic unit (A7/3)
- BAS solenoid valve (A7/7y1)
- Vacuum pump relay (+) (K109)
- Vacuum pump relay (-) (K109/1)
- Brake light actuation via rear SAM control unit (N10/8)
- Brake pressure simulator valve (Y113)
- Power supply for yaw rate sensor for lateral and longitudinal acceleration (B24/15)
- Power supply for BAS membrane travel sensor (A7/7b1)
- Power supply for BAS solenoid valve (A7/7y1)
- Power supply for pedal angle sensor (B37/1)
- Power supply for brake pressure simulator valve pressure sensor (B18/5)
- Power supply for vacuum sensor (A7/7b3)
- Power supply for hybrid brake light switch (S9/3)
CAN input signals
Yaw rate, lateral and longitudinal acceleration sensor (B24/15)
- Yaw angle velocity signal
- Lateral acceleration signal
ME-SFI [ME] control unit (N3/10)
- Hybrid engine hood contact switch (S62/51)
Front SAM control unit (N10)
- Brake fluid check switch signal (S11)
- Parking brake indicator switch signal (S12)
Upper control panel control unit (N72/1)
- ESP OFF button signal (N72/1s1)
EIS [EZS] control unit (N73)
- Ignition ON
Steering column tube module (N80)
- Steering angle sensor signal (N49)
- CC [TPM] push button signal (S40)
Central gateway control unit (N93)
- Diagnostic CAN (CAN-D) interface
Power electronics control unit (N129/1)
- Currently available regenerative braking torque
- Currently realized regenerative braking torque
Hybrid vehicle fully integrated transmission control controller unit (Y3/10)
- Wheel torque factor, overall gear ratio
- Actual gear, target gear
- Transmission variant, recognition of basic variants, difference in gear ratios
CAN output signals
Instrument cluster (A1)
- ABS indicator lamp (A1e17)
- ESP warning lamp (A1e41)
- RBS indicator lamp (A1e20)
- Brake indicator lamp (A1e64)
- Multifunction display (A1p13)
ME-SFI [ME] control unit (N3/10)
- Vehicle speed
- Wheel speed signal
- Brake recognition
- Diagnosis
Rear SAM control unit (N10/8)
- Left brake light signal (E3e4)
- Right brake light signal (E4e4)
Central gateway control unit (N93)
- Diagnostic CAN interface
Power electronics control unit (N129/1)
- Request for regenerative braking torque
- Cruise control request
- Torque request
Hybrid vehicle fully integrated transmission control controller unit (Y3/10)
- Wheel speeds and direction of rotation, substitute values in the event of failure of the output shaft rpm sensor
| Wiring diagram for hybrid regenerative braking system control unit | PE42.45-P-2102-97MAA |