Diagnostic Functions

DIAGNOSTIC FUNCTIONS

General
The control modules have a built-in diagnostic system, Volvo Diagnostics, which continuously monitors internal functions as well as input and output signals. The central locking system is a distributed system which stores diagnostic trouble codes (DTCs) in different control modules depending on where the fault occurred.

Diagnostic trouble codes (DTCs)
A diagnostic trouble code (DTC) is stored if a control module detects a fault in a connected component.
If for some reason a fault disappears after the diagnostic trouble code (DTC) has been permanently stored in a control module, information about the fault remains in the control module.

Rear electronic module (REM)
Rear electronic module (REM) can identify 12 different faults associated with the central locking system and can store up to 10 diagnostic trouble codes (DTCs) simultaneously.

Driver door module (DDM)
Driver door module (DDM) can identify 20 different faults associated with the central locking system and can store up to 10 diagnostic trouble codes (DTCs) simultaneously. For further information, see Design and Function, driver door module (DDM) and passenger door module (PDM).

Passenger door module (PDM)
Passenger door module (PDM) can identify 20 different faults associated with the central locking system and can store up to 10 diagnostic trouble codes (DTCs) simultaneously. For further information, see Design and Function, driver door module (DDM) and passenger door module (PDM).

Activating components and functions
A number of activations can be performed via VIDA Vehicle communication:
- Lock motor, left-hand/right-hand rear door, lock/unlock
- Lock motor, trunk lid/tailgate, lock/unlock
- Lock motor, fuel tank filler cap, lock/unlock
- Lock motor, child safety locks, lock/unlock