Parking, Basic Function - GF54.65-S-1002A
Model All (Light transporter)
With Code EZ5 (Active Parking Assist with reversing camera)
Model All (Light transporter)
With Code EZ6 (Parking package with 360-degree camera)
Model All (Light transporter)
With Code EZ7 (Active Parking Assist)
Model All (Light transporter)
With Code JB6 (Parking package with 360-degree camera)
Model All (Light transporter)
With Code JB7 (Parking Package with reversing camera)
Overview
This document contains the following information:
- General information
- Function requirements
- Function
General information
Active Parking Guidance makes it easier to enter and exit a parking space.
On vehicles with automatic transmission, starting off, braking and steering are taken over by the system during assisted entry and exit of the parking space.
On vehicles with manual transmission, emergency braking is applied while being assisted in and out of a parking space, if an imminent collision is detected.
Active Parking Guidance (automatic parking space entry/exit) is available in different versions depending on the model series and model year.
Function requirements
- Engine running or drivetrain operational
- Parking space detected and selected
- Vehicle speed below 10 km/h (vehicles with automatic transmission)
- No trailer detected (vehicles with trailer hitch) (surround monitoring while reversing)
- Vehicle was parked automatically (only for exiting parking space)
Function
Active Parking Guidance is started by selecting a parking space previously detected by the system.
The system evaluates the following function-relevant parameters for this:
- Drive range (vehicles with automatic transmission)
- Electric power steering status
- Wheel speeds and wheel rotation direction
- Steering wheel angle
- Status of anti-lock braking system (ABS) and Electronic Stability Program (ESP®)
- Trailer recognition (vehicles with trailer hitch)
Semi-automatic parking space entry
If the parking system has detected a suitable parking space and the parking procedure has started, various driving instructions and messages are shown to the driver in the instrument cluster or central display. The driver can then take their hands off the steering wheel. The parking system steers the vehicle into the parking space with targeted steering movements. The driver only needs to operate the accelerator pedal, on vehicles with manual transmission braking is also required.
The parking system control unit calculates the required steering movement from the size of the parking space and the position in relation to the given space. The actual steering movement is recorded by the steering angle sensor; this is integrated into the steering column tube module control unit. The steering column tube module control unit sends the information on the steering angle to the parking system control unit. The parking system control unit sends corresponding steering commands to the electrical power steering control unit. The electrical power steering control unit then actuates the electric power steering actuator motor accordingly. The steering gear converts the rotation movement of the electric power steering actuator motor into a parallel movement. The parking system control unit monitors the gear rack travel of the steering gear here. This is recorded by the electric power steering torque sensor. The electric power steering control unit reads in the signals from the electric power steering torque sensor directly and sends the information on the rack-and-pinion travel of the steering gear to the parking system control unit.
The parking system control unit sends the appropriate requests to issue driving instructions and messages to the instrument cluster control unit.
Reversing or forward travel monitoring is active during parking.
On vehicles with automatic transmission, the ESP® control unit calculates the required braking torque and actuates the traction system hydraulic unit accordingly upon reaching the maneuvering points or the park position. For this purpose, the parking system control unit sends information about the remaining distance to the defined obstacle to the ESP® control unit.
Changes to the remaining distance to the obstacle are also taken into consideration (e.g. a person walking into the path of the vehicle). However, a collision cannot be prevented in all cases.
The side boundary of the parking space is defined by a recognized obstacle (e.g. a curb or bollard). If no obstacle is detected at the side, the parking system aligns the vehicle to the front or rear obstacle.
When doing this, the angled position of the vehicle in the parking space is corrected by means of appropriate maneuvering movements. The wheels are moved to the straight ahead position once the parking procedure has been completed. As soon as the vehicle is safely in position, a corresponding message appears in the instrument cluster, accompanied by a warning tone.
The following situations lead to the deactivation of the parking system:
- Exceeding the permissible speed
- Turning of the steering wheel
- Defect on an electrical component in the power steering
- Defect on an electric or hydraulic component of the brake system
- Faulty CAN signals
- Driver's door or driver seat belt buckle open
- Deactivation of the parking system
In the event of deactivation of the parking system due to the circumstances listed, reactivation requires a change of gear or drive range. If the vehicle is outside the previously calculated trajectory (g), it must be manually steered to a starting position from which a new trajectory (g) can then be calculated.
Semi-automatic parking space exit
The semi-automatic parking space exit function must be preceded by semiautomatic parking of the vehicle. This ensures that the vehicle is positioned parallel to a parking space boundary. This information is required because the parking system first requests the "straight to the rear" vehicle movement to exit the parking space. If the vehicle was positioned in the parking space at an angle, a rim could be damaged by the curb, for example.
The semi-automatic parking space exit function is activated by actuating the turn signal indicator in the direction in which the parking space is to be exited. The steering column tube module control unit reads in the switch position of the combination switch directly and sends it to the parking system control unit. At the same time, the parking system control unit evaluates the transmission position. The subsequent function sequence corresponds to that of semi-automatic parking.
| Function schematics | |||
| Entering and exiting parking spaces, function schematic | Model 420 with code EZ7 (Active Parking Assist) | PE54.65-S-2502-97VRA | |
| Additional basic functions | |||
| Torque coordination, basic function | All models with all engines | GF07.10-S-1060A | |
| Gearshift system, basic function | Model all with transmission 700.800 with code EZ7 (Active Parking Assist) |
GF27.60-S-1002A | |
| Electric power steering control unit, basic function | All models (light vans) | GF46.35-S-9890A | |
| Steering, basic function | All models (light vans) | GF46.35-S-9900A | |
| Instrument cluster control unit, basic function | All models (light vans) | GF54.30-S-9891A | |
| Environment monitoring, basic function | GF54.65-S-1000A | ||
| Parking space detection, basic function | Model all (Light transporter) with code EZ7 (Active Parking Assist) |
GF54.65-S-1001A | |
| Parking system control unit, basic function | All models (light vans) | GF54.65-S-9890A | |
| Head unit control unit, basic function | All models (light vans) | GF82.85-S-9891A | |
| Multimedia system control, basic function | All models (light vans) | GF82.85-S-9904A |