System Overview

System overview

Control module




The task of the Parking Assistance Camera (PAC) is to aid with parking.
When reverse is engaged, the Parking Assistance Camera (PAC) is activated. An image is displayed on the High Level Display Front (HLDF) (also called monitor in the documentation), which shows what is behind the vehicle.
Guidelines appear on the monitor, which correspond to distances of 0.3 and 1.5 m behind the vehicle. At right angles to these guidelines, there are other guidelines that indicate the lateral position of the vehicle. If the angle of the steering wheel is altered, the guidelines indicating the position of the vehicle move laterally. If there is an object behind the car that is registered by the Parking Assistance Module (PAM) , bars appear that indicate how close the object is, and in which direction it is in.
In the S80 the control module is located on the left side of the cargo compartment under the tail light, and in the V70/XC70/XC60 by the wheel housing under the cargo compartment floor.
The camera is located in the cargo compartment
The Parking Assistance Camera (PAC) communicates both with directly connected components via LIN communication and with other control modules via CAN communication.
The control module checks its calculations and all carried out activations, input and output signals using built-in diagnostic functions. A diagnostic trouble code (DTC) is stored if the control module detects a fault. In certain cases, the incorrect signal is replaced with a substitute value.
Any diagnostic trouble codes are stored in the control module memory. The data can be read off using the diagnostic tool.
If the control module detects a fault, a diagnostic trouble code (DTC) is stored inside the control module's internal memory. At the same time, a number of values are stored. These are frozen at the time the fault occurred. Depending on the severity of the fault, certain functions may be partially or completely disengaged. Diagnostic trouble codes (DTCs) and frozen values (extended diagnostic trouble code (DTC) information) can be read off using VADIS via the data link connector (DLC) in the vehicle.
The Parking Assistance Camera (PAC) and corresponding video camera can be replaced separately.
To check that the Parking Assistance Camera (PAC) is powered and grounded, ignition position II can be activated and reverse engaged when stationary. If the display screen rises and shows an image of what is behind the vehicle, the Parking Assistance Camera (PAC) is powered.
For further information, also see Signal specifications.

Signals
The table below summarizes the input signals to and output signals from the Parking Assistance Camera (PAC). The signal types are divided into directly connected signals, LIN communication and controller area network (CAN) communication. The illustration below displays the same information with the Volvo component designations.