Table 35
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. Determine the Code
A. Establish communication between the electronic service tool
and the Electronic Control Module (ECM). Refer to Troubleshoot-
ing, “Electronic Service Tools”, if necessary.
B. Download the “Warranty Report” from the ECM before trouble-
shooting or clearing any diagnostic trouble codes.
C. Determine the diagnostic trouble code that is active.
Diagnostic trou-
ble code
Result: A 1235-9 (5856–9) code is active or logged.
Note: Troubleshoot the associated code before continu-
ing with this procedure Refer to Troubleshooting, CAN
Data Link - Test.
Result: One of the codes in Table 33 is active.
Proceed to Test Step 3.
Illustration 37 g03370573
Typical refractometer reading for DEF in good
condition
Illustration 38 g06549965
Typical example of a good test strip result
UENR4469-36 99
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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