Diesel Particulate Filter Has Differential Pressure Problem - Perkins 854F-E34T Troubleshooting Manual

UENR0612
Table 18
Troubleshooting Test Steps
1. Diagnostic Codes
A. Establish communication between the electronic service tool and
the Electronic Control Module (ECM).
B. Check for active diagnostic codes. Check specifically for codes
that relate to the "Probable Causes" in this procedure.
2. Individual Malfunctioning Cylinders
If the engine will run, perform the following steps.
A. With the engine speed at a fast idle, use the electronic service
tool to perform the manual "Cylinder Cut Out Test" . As each cylin-
der is cut out, listen for a change in the sound from the engine.
When a cylinder is cut out, there should be a noticeable change in
the sound of the engine.
3. Exhaust Leaks
A. Thoroughly inspect the exhaust duct between the engine and the
CEM for leaks. Ensure that all connections are secure and no leaks
are present.
B. Inspect the insulation on the exhaust duct (if equipped) for
damage.
4. Manual Regeneration
A. If a 3251-16 or 3719-16 diagnostic code was active, use the elec-
tronic service tool to perform a "Particulate Filter Forced Regenera-
tion" . Make sure that the high soot loading diagnostic trouble code
is no longer active.
B. If a 3251-0 or 3719-0 diagnostic code was active, the DPF must
be replaced. Refer to Disassembly and Assembly, "Diesel Particu-
late Filter - Remove" and refer to Disassembly and Assembly, "Die-
sel Particulate Filter - Install". Use the electronic service tool to
perform the "DPF Replacement Reset" .
Diesel Particulate Filter Has
Differential Pressure Problem
Note: This procedure is only applicable to engines
equipped with a wall flow Diesel Particulate Filter
(DPF) and a DPF differential pressure sensor.
This procedure covers the following diagnostic codes:
This document has been printed from SPI2. NOT FOR RESALE
Values
Diagnostic Result: A diagnostic trouble code is active or logged.
codes
Troubleshoot any related diagnostic codes before continu-
ing with this procedure.
Result: A related diagnostic trouble code is not active or
logged.
Proceed to Test Step 2.
Insulation Result: There is not a noticeable change in the sound of
the engine for at least one cylinder.
Investigate the cause of the fault on any cylinder that is not
operating. Investigate the cause of the fault on any cylinder
that is operating below normal performance.
When all faults have been rectified, proceed to Test Step 4.
Result: There is a noticeable change in the sound of the
engine for each cylinder.
Proceed to Test Step 3.
Exhaust leaks Result: There are exhaust leaks. The insulation is
damaged.
Make the necessary repairs. Proceed to Test Step 4.
Result: The exhaust duct is OK.
Proceed to Test Step 4.
Complete Result: The regeneration completed successfully and there
regeneration are no active diagnostic codes.
Return the engine to service.
Result: The regeneration did not complete successfully.
Contact the Dealer Solution Network (DSN).
i05995809
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Symptom Troubleshooting
Results