Parking Assist Control Module: Description and Operation
Parking Assistance Module (PAM)
System overview
Control module
S40/V50/C70
C30
There is a parking assistance system to assist parking. The parking assistance module (PAM) manages components in the system and communication with other control modules.
The control module is located in the cargo compartment, behind the right wheel arch.
The parking assistance module (PAM) communicates with directly connected components and with other control modules via the controller area network (CAN).
The control module checks the input and output signals through an integrated diagnostic system. A diagnostic trouble code (DTC) is stored if the control module detects a fault. Any diagnostic trouble codes (DTCs) are stored in the control module memory. The data can be read off using VIDA.
Signals
The table below summarizes the input signals to and output signals from the parking assistance module (PAM). The signal types are divided into directly connected signals and CAN communication. The illustration below displays the same information with the Volvo component designations.
Design
Control module
S40/V50/C70
C30
The parking assistance module (PAM) assists the driver when parking. Information from a number of sensors allows the control module to warn of objects close to the vehicle. A sound is transmitted through the loudspeaker which is connected to the integrated audio module (IAM).
A text message is displayed in the infotainment control module (ICM) when the parking assistance system is active. The parking assistance system can be temporarily deactivated at lower speeds. This is done manually using the control on the panel for the infotainment control module (ICM).
The components which are directly connected to the parking assistance module (PAM) are:
- rear sensors
- front sensors (option).
The parking assistance module (PAM) communicates on the controller area network (CAN) with:
- central electronic module (CEM)
- driver information module (DIM)
- transmission control module (TCM)
- infotainment control module (ICM)
- trailer module (TRM) (option).
Rear parking sensors
S40/V50/C70
C30
There are 4 rear sensors in the rear bumper. The sensors are able to detect objects at a distance of 1.5 meters.
The smallest objects which can be detected are:
- tube-shaped objects with a length of at least 850 mm (33.5 in.) and a diameter of at least 85 mm (3.3 in.) (ISO standard).
The rear sensors are active when the ignition is on in position II if there is no trailer and back-up (R) gear is selected.
The sensors are deactivated automatically when the gear selector lever is moved from back-up gear (R) or a trailer is electrically connected to the vehicle.
Front parking sensors (option)
S40/V50/C70
C30
There are 4 front sensors in the front bumper. The sensors detect objects within a distance of 0.8 meters.
The smallest objects which can be detected are:
- tube-shaped objects with a length of at least 850 mm (33.5 in.) and a diameter of at least 85 mm (3.3 in.) (ISO standard).
The front sensors are active when the ignition is on in position II and gear R is selected, or when the ignition is on in position II and the car is driven forwards at speeds below 10 km/h. The sensors are automatically deactivated when the car is driven forwards at above 15 km/h. On cars with automatic transmissions, the sensors are deactivated if P is selected, irrespective of speed.
Function
Parking assistance system
The parking assistance module (PAM) (4/86) helps the driver when parking. Information from a number of sensors allows the control module to warn of objects close to the vehicle. A sound is transmitted through the loudspeaker which is connected to the integrated audio module (IAM).
The rear sensors (7/131, 7/132, 7/133 and 7/134) are active when the ignition is on in position II and back-up gear (R) is selected and no trailer is electrically connected to the vehicle. The sensors are deactivated automatically when the gear selector lever is moved from back-up gear (R) or a trailer is electrically connected to the vehicle. The sensors detect objects at a distance of 1.5 meters. A beeping sound is heard from one of the rear loudspeakers. If the vehicle is left-hand drive, the sound comes from the rear right-hand loudspeaker (16/5). If the vehicle is right-hand drive, the sound comes from the rear left-hand loudspeaker (16/6). The sound signal becomes more frequent as the distance to the object reduces. The sound is constant at distances below approximately 30 cm.
The front sensors (7/204, 7/205, 7/206 and 7/207) (option) are active when the ignition is on in position II and gear R is selected, or when the ignition is on in position II and the car is driven forwards at speeds below 10 km/h. The sensors are automatically deactivated when the car is driven forwards at above 15 km/h. On cars with automatic transmissions, the sensors are deactivated if P is selected, irrespective of speed. The sensors detect objects at a distance of 0.8 meters. A beeping sound is heard from one of the front loudspeaker on the driver's side (16/4). The sound signal becomes more frequent as the distance to the object reduces. The sound is constant at distances below approximately 30 cm.
The Parking Assistance Module (PAM) transmits information to the Infotainment control module (ICM) (16/1.2) on the controller area network (CAN) if parking assistance is active or not.
A text message is displayed in the infotainment control module (ICM) when the parking assistance system is active. The infotainment control module (ICM) transmits a signal to the audio module (AUD)/Integrated Audio Module (IAM) requesting sound from the loudspeaker.
The central electronic module (CEM) (4/56) transmits information about vehicle speed to the parking assistance module (PAM) on the controller area network (CAN).
The central electronic module (CEM) transmits information to the parking assistance module (PAM) on the controller area network (CAN). The information indicates the position of the gear selector lever (vehicles with manual transmissions).
The transmission control module (TCM) (4/28) transmits information to the parking assistance module (PAM) on the controller area network (CAN). The information indicates the position of the gear selector lever (cars with automatic transmissions).
The trailer module (4/110) (option) transmits information on the controller area network (CAN) to the parking assistance module PAM). This information indicates whether or not there is a trailer electrically connected to the tow hitch connector.
If there is a fault in the parking assistance system, the parking assistance module (PAM) transmits a message on the controller area network (CAN) to the driver information module (DIM) (5/1). The information lamp lights in the driver information module (DIM) and a text message is displayed.