Table 48
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 in-
stall the latest DCU software. If necessary, refer to Trouble-
shooting, “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 Fluid Level
A. Turn the keyswitch to the ON position. Do not start the engine.
B. Check the current position of the DEF gauge.
Note: The gauge may take up to 60 seconds to show the correct
DEF level.
C. Turn the keyswitch to the OFF position.
D. Clean dirt and debris from around the cap before removing the
cap.
E. Add DEF to the DEF tank.
Note: Only use DEF that meets ISO 22241 quality standards.
F. Turn the keyswitch to the ON position.
Note: The gauge may take up to 60 seconds to show the correct
DEF level.
G. Check for a change in the gauge position.
Gauge position Result: The gauge did not move by adding DEF to the
tank.
Proceed to Test Step 3.
Result: The gauge moved by adding DEF to the tank.
Turn the keyswitch to the OFF position until the “Wait to
Disconnect” lamp switches off to allow the DEF pump to
purge, reset the code, and reset the DEF Control Unit
(DCU). Return the unit to service.
UENR4469-36 113
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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