Parallel Parking Operation

After the active park assist system is activated and the PAM has determined the driver is attempting to maneuver the vehicle into a parallel parking space (the active park assist switch is pressed once), the PAM begins searching for a parking space using the front active park assist sensors. The multifunction switch turn signal input from the SCCM determines which side of the vehicle the PAM should search for a parking space. When a side is selected the PAM searches on that side of the vehicle until the active park assist is switched off, the ignition is cycled, or the opposite side is selected by the driver. By default, the PAM searches for parking spots on the passenger side of the vehicle.

The system measures the available parking spaces and its surroundings as the operator drives by to determine if the vehicle can be maneuvered into the available parking space. The PAM uses inputs from the front active park assist sensors and the wheel speed and rotation data message to find an acceptable parking space. After a space has been located, a chime is sounded through the audio system and the centerstack infotainment display shows a message informing the driver that a parking space has been located on the left or right side and requesting the driver to pull forward to park. After the driver moves the vehicle forward to the appropriate start position, as determined by the PAM, the system requests the driver to stop, shift the transmission into neutral (N) and remove hands from the steering wheel. After the transmission is in neutral (N) and no driver input torque on the steering wheel is detected (driver has removed their hands from the wheel), the active park assist system takes control of the steering, acceleration and braking.

The PAM determines the parallel parking maneuvers are completed based on the final vehicle alignment. The vehicle should be located approximately 0 to 30 cm (12 in) from the street curb if a curb is detected, otherwise the system aligns the vehicle to the slot end object. When the active park assist maneuver is complete, the centerstack infotainment display displays an active park assist finished message followed by an audible chime.

Parallel Park Out Assist Operation 

Parallel park out assist is available immediately after a parallel park was completed or after an ignition on. The driver must activate the active park assist system by pressing the active park assist switch once, using the turn signal before the system measures the location, select the side to exit the parking spot. Once the turn signal status is received from the SCCM, the PAM verifies the indicated side is clear by analyzing the clearance around the vehicle using input from the active park assist sensors and the parking aid sensors. When the indicated side is clear of obstructions, the centerstack infotainment display shows a message informing the driver to remove hands from the steering wheel and shift to neutral (N), depending on the detected clearances to the front and rear of the vehicle. After the transmission is shifted and no driver input torque on the steering wheel is detected (driver has removed their hands from the wheel), the system slowly pulls out of the parking spot. The PAM sends the active park assist steering angle request to the PSCM to turn the wheels to an angle which steers the vehicle out of the parallel parking space on the desired side. A vehicle gear and speed request is sent from the PAM to the PCM. When needed the PCM will send a brake request to the ABS module to slow or stop the vehicle.

The PAM determines that the parallel park out assist maneuvers are complete when a clear path to exit the parking space is detected. When the maneuver is complete, a chime is played and the centerstack infotainment display shows a message informing the driver to take control of the steering. It remains the responsibility of the driver to check for safe conditions when entering traffic from a parking space.

Perpendicular Parking Operation 

The perpendicular parking feature is available when the active park assist system has been activated (the active park assist switch is pressed twice) and the PAM has determined the driver is attempting to maneuver the vehicle into a perpendicular parking space. Using the front active park assist sensors, the multifunction turn signal input from the SCCM, the PAM begins searching for a parking space. If the turn signal is not active, the PAM defaults to searching on the passenger side of the vehicle.

The system measures the available parking spaces and its surroundings as the operator drives by to determine if the vehicle can be maneuvered into the available parking space. The PAM uses inputs from the front active park assist sensors and the wheel speed and rotation data message to find an acceptable parking space. After a space has been located, a chime is sounded through the audio system and the centerstack infotainment display shows a message informing the driver that a parking space has been located on the left or right side and requesting the driver to pull forward to park. After the driver moves the vehicle forward to the appropriate start position as determined by the PAM, the system requests the driver to stop, shift the transmission into neutral (N) and remove hands from the steering wheel. The PAM sends the active park assist steering angle request to the PSCM to turn the wheels to an angle which steers the vehicle into the perpendicular parking space on the desired side. A vehicle gear and speed request is sent from the PAM to the PCM. When needed the PCM will send a brake request to the ABS module to slow or stop the vehicle.

The PAM determines the perpendicular parking maneuvers are completed based on the final vehicle alignment. The perpendicular parking aid system attempts to center the vehicle between the two vehicles and align the end vehicle angle with the angle of the parked vehicles. If only one vehicle is detected, the system aligns with that vehicle at a distance of 70 to 90 cm (28 to 35 in) in North America and South America or 55 to 75 cm (22 to 30 in) in Europe and Asia Pacific. When the active park assist maneuver is complete, the centerstack infotainment display displays an active park assist finished message followed by an audible chime.