Avoid contact with hot surfaces. Exhaust piping
and engine components become hot during en-
gine operation and cool slowly after engine shut-
down. Any contact with hot surfaces can cause
severe burns.
This test must be performed under the following
conditions:
• There are no related active diagnostic codes
• The engine must be running
• The engine must be under minimum load
• Coolant must be at a minimum required
temperature
If the required conditions are not maintained
throughout the test, error identifiers will be displayed.
Once the pre-conditions are met, the EBPR will start
to close until a target cylinder head pressure
differential is achieved. If the target is not met, an
error identifier will be displayed to indicate that EGR
intake pressure is not responding. If the target
pressure is achieved, the test will wait for the
temperature to stabilize. The test will then check if
the DPF intake temperature is above a minimum
threshold. If the minimum temperature is not
achieved, an error identifier will be displayed to
indicate that DPF intake temperature is too low.
Once the system verification steps are complete, the
test will monitor the soot load. If the soot has already
reduced below the required level, the test will pass
successfully. If the soot has not dropped below the
required level, the test will monitor the soot reduction
rate. If the rate is too slow, the test will send an error
identifier. If the soot reduction rate is acceptable, the
test will continue until the target soot level is
achieved.
Aftertreatment Sulfation Recovery
Procedure
Note: This procedure is only applicable to engines
that have a DPF in the aftertreatment system.
Avoid contact with hot surfaces. Exhaust piping
and engine components become hot during en-
gine operation and cool slowly after engine shut-
down. Any contact with hot surfaces can cause
severe burns.
This test must be performed under the following
conditions:
• There are no related active diagnostic codes
• The engine must be running
• Engine speed must be sufficient for desulfation to
occur
• The engine must be under minimum load
• Coolant must be at a minimum required
temperature
If engine speed is not within the required range
during warmup, the option to continue will be offered.
If the test continues, a minimum coolant temperature
must be achieved. If the target parameters are not
met, error identifiers will be displayed.
Once the pre-conditions are met, the EBPR will start
to close until a target cylinder head pressure
differential is achieved. If the target is not met, an
error identifier will be displayed to indicate that EGR
intake pressure is not responding. If the target
pressure is achieved, the test will wait for the
temperature to stabilize. The test will then check if
the DPF intake temperature is above a minimum
threshold. If the minimum temperature is not
achieved, an error identifier will be displayed to
indicate that DPF intake temperature is too low.
Once the system verification steps are complete, the
test will continue to run for a set time to desulfate the
DPF. This test will run for up to an hour and a percent
complete signal will be displayed to indicate
progress.
Service Tool Error Identifiers
Error identifiers are displayed when an electronic
service tool service test has failed. The error
identifiers explain the reason for the service test
failure. The service test error identifier may identify
the failed component. For a list of error identifiers,
refer to Troubleshooting, “Service Tool Error
Identifiers”. If necessary, refer to the troubleshooting
guide for the appropriate troubleshooting procedure.
Aftertreatment History
Connect to the electronic service tool.
Select the Engine ECM.
Select the Information tab.
Aftertreatment Abnormal Shutdown
History
This feature allows the user to see when the engine
was stopped incorrectly. This screen shows hot
shutdown events, and cold shutdown events.
A hot shutdown can damage the aftertreatment or
SCR system.
A cold shutdown can damage the SCR dosing
system.
462 UENR4469-36
Service
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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