(Table 44, contd)
Troubleshooting Test Steps
Values Results
7. Replace the DEF Pump Filter
A. Turn the keyswitch to the OFF position until the wait-to-discon-
nect lamp switches off.
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. Replace the DEF pump filter. Refer to Operation and Mainte-
nance Manual, Diesel Exhaust Fluid Filter - Clean/Replace.
C. Use the electronic service tool to perform an “Aftertreatment
System Functional Test” .
DEF filter Result: The “Aftertreatment System Functional Test” was
successful. The diagnostic code is no longer active.
Return the engine to service.
Result: The “Aftertreatment System Functional Test” was
not successful. The diagnostic code is still active.
Proceed to Test Step 8.
8. Inspect the Lines for Leaks
A. Turn the keyswitch to the ON position. Do not start the engine.
B. Connect to the electronic service tool.
C. Perform the “DEF Dosing System Verification Test” to pressurize
the system. Refer to Troubleshooting, “Service Tool Features” for
more information.
D. Inspect all the DEF lines for disconnected lines or leaks.
Leaks Result: A leaking or disconnected line was found.
Repair: Repair or replace the faulty DEF line.
Proceed to Test Step 12.
Result: A leaking or disconnected line was not found.
Proceed to Test Step 9.
Illustration 41 g03790973
Typical view of the Pump and Electronics Unit (PEU)
(1) DEF Pump
(2) DEF Pressure line connection
(3) DEF suction line connection
Illustration 42 g03790991
Typical view of the DEF tank
(4) DEF tank header unit
(5) DEF suction line connection
(6) DEF return line connection
110 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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