Table 41
Troubleshooting Test Steps
Values Results
1. Check that the latest available software is installed and
there are no applicable Technical Information Bulletins or
Special Instruction documentation released
A. Ensure that the latest software is installed on the engine ECM.
B. Ensure that the latest software is installed on the Dosing Con-
trol Unit (DCU)
If necessary, refer to Troubleshooting, “ECM Software - Install” for
the correct procedure.
C. Ensure all Technical Information Bulletins and/or Special In-
struction documented for the issue and/or product are reviewed
and followed.
Software and
Publications
Result: The latest software is not installed.
Repair: Install the latest engine ECM software and then
install the latest DCU software. If necessary, refer to
Troubleshooting, “ECM Software - Install” for the correct
procedure.
Start the engine and wait for 2 minutes.
If the fault is cleared, return the engine to service.
If the fault is still present, proceed to Test Step 2.
Result: Applicable Technical Information Bulletin/Special
Instruction publication is available.
Repair: Review and follow instructions provided in the
available publication.
Result: The latest software is installed.
Proceed to Test Step 2.
2. Check the DEF Lines for Restrictions
A. Turn the keyswitch to the OFF position for 15 minutes.
Note: The keyswitch must be OFF until the “Wait to Disconnect”
lamp switches off to allow the DEF pump to purge, reset the code,
and reset the Diesel Exhaust Fluid Controller (DCU).
B. Remove the DEF pressure line from the DEF pump connection
(2) and the DEF injector. Install Tooling (A) on the DEF pump and
injector connections.
C. Remove the DEF return line from the DEF tank header connec-
tion (6) and the DEF injector. Install Tooling (A) on the DEF tank
header and injector connections.
D. Inspect the DEF pressure line and the DEF return line for re-
strictions and/or obstructions. If necessary, use low-pressure air.
E. Inspect the DEF return pipe in the DEF tank header for restric-
tions and/or obstructions.
Note: Possible obstructions are ice, DEF deposits, or debris.
DEF suction line
restriction
Result: An obstruction was found in a DEF line.
Repair: Flush line with deionized water or clean low-
pressure air. If necessary, replace the line.
Proceed to Test Step 6.
Result: An obstruction was found in the DEF tank header
return pipe.
Repair: Remove the DEF tank header from the DEF
tank. Refer to Disassembly and Assembly, Manifold (DEF
Heater) - Remove and Install.
Flush the return pipe with deionized water or clean low-
pressure air. If necessary, replace the DEF tank header.
Install the DEF tank header in the DEF tank. Refer to Dis-
assembly and Assembly, Manifold (DEF Heater) - Re-
move and Install.
Proceed to Test Step 6.
Result: An obstruction was not found.
Proceed to Test Step 3.
(continued)
104 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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