Function Sequence For Semi-Automatic Parking Space Exit

The semi-automatic parking space exit function must be preceded by semi-automatic parking of the vehicle in a parallel parking space. This ensures that the vehicle is positioned parallel to the curb, if applicable. This information is required as the Active Park Assist first requests "straight to the rear" vehicle movement to exit the parking space. If the vehicle was positioned in the parking space at an angle, the rims could be damaged by the curb. The semi-automatic parking space exit function is activated by actuating the turn signal indicator in the direction (left or right) in which the parking space is to be exited. The steering column tube module control unit reads in the switch position from the combination switch directly and sends this information via the CAN communication, electronic ignition lock control unit and CAN communication to the sonar control unit. The sonar control unit evaluates the gear range status. If the gear range is not "P", the sonar control unit sends the query "Start Parking Assist?" via the CAN communication to the combination meter.

NOTE: Semi-automatic parking is only possible in the direction in which the vehicle was originally parked.

Courtesy of NISSAN NORTH AMERICA, INC.

	: Exit space to left
	: Exit space to right

This process is visualized in the combination meter in accordance with the driver request (exit space to left or right). The driver can then activate the semiautomatic parking space exit function via the left multifunction steering wheel button group. The symbols shown in the information display correspond to the OK button for "Yes" (activate) or the "Back" and voice control system OFF button for "No" (do not activate). The steering column tube module control unit reads in the control signals from the left multifunction steering wheel button group via the steering LIN and steering wheel electronics and sends these signals via the CAN communication, the electronic ignition lock control unit and CAN communication to the combination meter. Depending on the response to the message, the combination meter sends the appropriate status of the Park Assist to the sonar control unit via the CAN communication. The sonar control unit then initiates the parking space exit process. Exiting the parking space begins with the "Please engage gear range R" request in the combination meter. Once the driver has moved the vehicle back, the sonar control unit sends corresponding steering commands via the CAN communication to the electrical power steering control unit. The electrical power steering control unit actuates the electric power steering actuator motor directly according to the requests (full steering wheel lock). The steering gear is used to mechanically convert the actuator motor actuation into corresponding steering movements. The sonar control unit monitors the gear rack travel on the steering gear. For this purpose, the electrical power steering control unit sends the corresponding information via the CAN communication to the sonar control unit.

According to the required maneuvering movements, the sonar control unit sends the request to display one of the following messages in the information display to the combination meter via the CAN communication):

"Please engage gear range D"
"Please engage gear range R"

If the vehicle (forwards or backwards) reaches a distance of more than 30 cm (11.8 in) to the parking space boundary, this is notified to the driver by the first red LED lighting up in the corresponding sonar system warning indicator.

The vehicle is automatically braked at the corresponding maneuvering points. The Electronic Stability Program control unit receives the brake requests from the sonar control unit, and actuates the traction system hydraulic unit accordingly. Once the Active Park Assist has positioned the vehicle such that the driver is able to drive straight out of the parking space, the sonar control unit sends the request to display the message "Parking assist. completed - Please take over" to the combination meter via the CAN communication.

The parking space exit procedure and the Park Assist are aborted in the following situations:

If the permissible speed of 10 km/h (6.2 MPH) is exceeded
Active intervention in steering wheel movement ("hands-on detection")
In this case, the electrical power steering control unit reads in the torque values from the electric power steering torque sensor directly and detects whether the steering wheel is being actively turned based on the difference in torque. The electrical power steering control unit sends this information via the CAN communication to the sonar control unit.
Malfunction on an electrical component in the power steering
Malfunction CAN signals
Driver's door and driver seat-belt buckle open at same time
Deactivating the system by pressing the parking system button
NOTE: In the event of deactivation of the parking system due to the circumstances listed, reactivation requires a change of gear or gear range. If the vehicle is out of the previously calculated trajectory, then the vehicle must be manually returned to the starting position, from which a new trajectory can then be calculated.

The following messages are also shown in the information display:

"Park Assist Active - Please engage gear range D"
"Park Assist Active - Please engage gear range R"
"Park Assist terminated - Please take over"
"Park Assist terminated"
"Park Assist nonfunctional"