Diagnostic Function
The diagnostic function monitors and controls the
engine. The diagnostic function has the following
tasks:
•
detecting and locating disturbances
•
reporting detection of disturbances
•
providing guidance when fault tracing
A fault message in the form of a fault code is always
generated when a disturbance is the detected by the
diagnostic function. If the
diagnostic function detects a
disturbance in the system, this is reported with a fault
code via the instruments.
The diagnostic function protects the engine and ensure
continued operation by affecting the engine, depend-
ing on the severity the engine is affected differently.
Depending on what instrumentation that is being used
the fault message is shown in various ways (fault
codes can also be read out by VODIA).
All fault codes and fault messages can be found in the
Fault Code Register together with information about
cause, reaction and actions, for further information see
chapter Fault Code Register.
CIU (Control Interface Unit)
When the system detects a malfunction, the diagnos-
tics lamp flashes. If the diagnostics button is pressed
and then released, a fault code is flashed out.
The fault code consists of two groups of flashes, sep-
arated by a pause of two seconds. A fault code is
obtained by counting the number of flashes in each
group.
Example
pause = fault code 2.4
The
fault
code
is
stored and can be read off as long as
the malfunction remains. Information about causes,
effects and actions required is available in the Fault
Code chapter.
Do as follows to read off the fault code:
1 Press the diagnostics button.
2 Release the diagnostics button and note down the
fault that is flashed out.
3 Repeat items 1–2. A new fault code will be flashed
out if more faults are stored. Repeat until the first
fault code reappears.
NOTICE! When the first fault code reappears, all fault
codes have been read off.
Fault Handling
32 7748681 12-2011
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