Diagnostic Function - Volvo Penta D4 Operator's Manual

Diagnostic function

The diagnostic function monitors and checks that the engine, stern drive/reversing gear and EVC system function
normally.
The diagnostic function has the following tasks:
●
Discover and localize malfunctions
● Notify that malfunctions have been discovered
●
Give advice in fault finding
●
Protect the engine and ensure continued operation when serious malfunctions are discovered.
Malfunction message
If the diagnostic function discovers a malfunction, it
warns the driver by starting to flash the indicator on
the diagnostic button. To acknowledge the alarm,
press button D on the control panel. When the fault
has been acknowledged, the lamp concerned gives
constant light.
NOTE! To enable engine start the alarm must be ack-
nowledged.
The diagnostic function affects the engine in the
following ways when:
1. The diagnostic function has discovered a minor
malfunction which does not damage the engine.
Reaction: The engine is not affected.
2. The diagnostic function has discovered a serious
malfunction which will not immediately damage the
engine (e.g. high coolant temperature):
Reaction: Engine power is reduced till the rele-
vant value is normalized.
3. The diagnostic function has discovered a serious
malfunction which will cause serious engine dama-
ge.
Reaction: Engine power is reduced.
4. The diagnostic function has discovered a serious
malfunction which makes it impossible to control
the engine.
Reaction: The reversing gear/drive is disengaged
and engine speed is cut to 1000 rpm.
It is possible to do an emergency shift: Please re-
fer to the "Emergency shifting" section.
5. The diagnostic function has discovered a serious
malfunction on the sterndrive shift mechanism or
in the engine fuel injection system.
Reaction: Engine is stopped
It is possible to do an emergency shift: Please re-
fer to the "Emergency shifting" section. In serious
emergency it is also possible to start the engine
with gear engaged after acknowledging the alarm.
In case of emergency
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