Control Module
V70
The most important task of the High Level Display Front (HLDF) is to present multimedia information, system settings and navigation information.
The control module is located in the middle of the dashboard. At replacement, the entire control module is removed from the vehicle.
High Level Display Front (HLDF) communicates both with the directly connected components, and with other control modules via CAN communication.
The control module checks its calculations and all activations made, and input and output signals through integrated diagnostics. A Diagnostic trouble code (DTC) is stored when the control module detects a fault. In certain cases the faulty signal is replaced by a substitute value. Any Diagnostic trouble codes (DTCs) are stored in the control module memory. The information can be read off using a diagnostic tool.
A diagnostic trouble code is stored in the control module's internal memory if the control module detects a fault. At the same time a number of values which occurred the moment that the fault occurred are frozen. Depending on how serious the fault is certain faults will be fully or partially disconnected.
Diagnostic trouble codes (DTCs) and frozen values (extended fault code information) can be read off using the diagnostic tool via the data link connector (DLC) in the vehicle.
Activate ignition position II to check if the High Level Display Front (HLDF) is supplied with voltage and grounded. If the screen rises up then the High Level Display Front (HLDF) is supplied with voltage. This does not apply to the XC60 as there is no raising function.
For further information, also, see SIGNALS .