Parking Assistance System

Courtesy of VOLVO CARS CORPORATION

The parking assistance system serves as an aid to the driver when parking the vehicle. Based on information from a number of sensors (7/131-134, 7/204-207 and 7/266-267), the system can warn of objects near the vehicle. The warning is in the form of an acoustic signal that is emitted from the speakers connected to the Audio Control Module (AUD) (16/105) or the Integrated Audio Module (IAM) (16/1). This acoustic warning is regulated by the parking assistance module (PAM) sending signals to the Audio Control Module (AUD) or Integrated Audio Module (IAM) via the Infotainment Control Module (ICM). There is also a visual warning in the form of graphics in the display for the Infotainment Control Module (ICM). This visual warning is regulated by the parking assistance module (PAM) sending signals to the Infotainment Control Module (ICM) with a request to show graphics.

It is possible to change the volume for the parking assistance system via the Infotainment Control Module (ICM).

When the parking assistance system is active, a graphic appears in the Infotainment Control Module (ICM) display and an LED illuminates in a switch located on the keypad for the Climate Control Module (CCM) panel. The system can be activated/deactivated both automatically and manually.

Rear parking assistance is active when the ignition is on, the gear selector is in reverse (R) and there is no trailer electrically connected to the vehicle. Rear parking assistance disengages automatically when the gear selector is moved from reverse (R) to any other gear position or when a trailer is electrically connected to the vehicle. Parking assistance can also be engaged/disengaged manually using the switch on the panel of the Climate Control Module (CCM).

The sensors detect objects at a distance of about 1.5 meters (5 feet) rearward and 0.8 meters forward, at which time a pulsing sound is emitted from the rear speakers. In left-hand drive vehicles, the sound comes from the right rear speaker (16/5). In right-hand drive vehicles, the sound comes from the left rear speaker (16/6). The acoustic signal comes at increasingly frequent intervals as the distance to the object decreases. The signal is a constant tone at a distance of approx. 30 cm or less.

Parking assistance front is active when the ignition is on and the gear lever is in reverse (R), or when the ignition is on and the vehicle is stationary or is driven forward at a speed up to 10 km/h.

Front parking assistance disengages automatically when the vehicle is driven forward at a speed of 11 km/h or more. If the vehicle's basic setting is used, front parking assistance is reactivated automatically when speed drops below 10 km/h.

Parking assistance can also be engaged/disengaged manually using the switch on the panel of the Climate Control Module (CCM).

If the ignition is on and the vehicle is stationary, front parking assistance is disengaged if the parking brake is engaged. On vehicles with automatic transmission, the sensors are also disengaged (regardless of speed) if the gear selector is moved to park (P). Parking assistance can also be engaged/disengaged manually using the switch on the panel of the Climate Control Module (CCM).

For the Parking Assistance Module (PAM) to work, the following signals are required:

• Information about key position and parking brake status as well as information about in which direction (right/left) the direction indicator is set is received from the Central Electronic Module (CEM) (4/56).
• Information about the vehicle speed is received from the brake control module (BCM) (4/16).
• Information about settings for the Parking Assistance Module (PAM) is received from the Infotainment Control Module (ICM) (3/281), via the Central Electronic Module (CEM).
• Information is received about steering wheel angle from the Steering wheel angle sensor module (SAS) (4/68).
• Information about whether a trailer is connected electrically to the socket for the trailer connector or not is received from the Trailer Module (TRM) (4/110) (accessory), via the Central Electronic Module (CEM).
• Information about which gear is engaged (only applies to vehicles with automatic transmissions) is received from the transmission control module (TCM) (4/28).
• Information about which gear is engaged (only applies to vehicles with manual gearbox) is received from the Engine Control Module (ECM) (4/46).
• Information about the switch for activating the Park Assist System (PAS) and Park Assist Pilot (PAP) functions is received from the Climate Control Module (CCM) (4/6), via the Central Electronic Module (CEM).
• Information is received about steering angle and torque from the Power steering module (PSCM) (6/164).

The Parking Assistance Module (PAM) transmits information about the following signals:

• Diagnostic information is sent to the Central Electronic Module (CEM) (4/56).
• Signals stating whether the parking assistance is active or not and whether errors have occurred in the PAS or PAP functionality are sent to the Infotainment Control Module (ICM) (3/281), via the Central Electronic Module (CEM). The Infotainment Control Module (ICM) then sends signals, with a request to emit sound from the speakers, to the Audio Control Module (AUD) or Integrated Audio Module (IAM).
• Signals with a request to activate the PAP function are sent to the Engine Control Module (ECM) (4/46).
• Information about the switch for activating/deactivating the Park Assist System (PAS) and Park Assist Pilot (PAP) functions is sent to the Climate Control Module (CCM) (4/6), via the Central Electronic Module (CEM).
• Signals with steering angle information are sent to the Power steering module (PSCM) (6/164).
• Signals with distance information to the object behind are sent to the Parking Assistance Camera (PAC) (27/6) via the Central Electronic Module (CEM).
• Signals that state whether the PAS function is activated/deactivated are sent to the Side Obstacle Detection Control Module Left (SODL) (4/126) respectively Side Obstacle Detection Control Module Right (SODR) (4/127), via the Central Electronic Module (CEM).
• Signals to light the information lamp and show text messages are sent to the Driver Information Module (DIM) (5/1), via the Central Electronic Module (CEM).