Illustration 174 g03826887
There are certain engine conditions that risk turbocharger overspeed. The engine is calibrated and certified up to a
certain altitude and ambient temperature limit. If the engine is operated outside this limit, the engine is more likely to
experience overspeed of the turbo. This situation occurs because the turbo has to work harder to maintain the
desired boost pressure. This situation is normal under most circumstances and no additional troubleshooting is
necessary.
System Communication Status
Connect to the electronic service tool.
Select the engine ECM.
Select the “Diagnostics” tab.
This feature provides a means of troubleshooting
J1939 data link issues. The feature shows which
modules are not responding and which data link
parameters are missing. Refer to Troubleshooting,
“Data Link - Test” for further information.
DPF Replacement Reset
Note: This procedure is only applicable to engines
that have a DPF in the aftertreatment system.
This procedure resets the estimated DPF life
remaining value when the DPF has been replaced
with a known good and clean unit. This functionality
is primarily intended for use at long-hour machine
overhaul before the machine is put back into service
again. Normally, this procedure should not be used
because the DPF has been sized for the normal life
of a machine . The “Aftertreatment #1 DPF Life
Remaining” value is used to assess whether a new
DPF is required for future usage expectations. At
some stage, the back pressure associated with the
original DPF may result in a performance
deterioration. This deterioration is caused by the
accumulation of non-combustible material (that is,
ash) within the DPF.
The reported “Aftertreatment #1 DPF Life Remaining”
value is an estimation based on the amount of fuel
that has been burnt by the engine. The estimate is
presented with appropriate caveats (for example,
correct use of fuels and oils, load factor below 60%).
If the “Aftertreatment #1 DPF Life Remaining” value
is reset, the “DPF#1 Soot Loading Percent” will also
reset. The reset must be performed only when a new
clean DPF is being fitted.
Note: A factory password is required to perform this
reset.
UENR4469-36 475
Service
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