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The purpose of the diagnostic function is to detect and locate any malfunctions in the EMS system, as well as to protect components from damage.
If a malfunction is detected, this is announced by warn- ing lamps, a flashing diagnostic lamp or a text message on the instrument panel, depending on the equipment fitted. If a fault code is displayed it is used for guidance in any fault tracing. Fault codes can also be read by Volvo’s VODIA tool at authorized Volvo Penta work- shops.
If there is a serious malfunction, the engine will be shut down completely or the control unit may reduce power output (depending on the application). Fault codes are registered as an aid to fault tracing.