(Table 41, contd)
Troubleshooting Test Steps
Values Results
3. Check for a Restriction in the DEF Pump
Note: If necessary, move the engine to an area where the ambient
temperature is at least 10° C (50° F) to perform this step. Make
sure that the DEF temperature is at least 10° C (50° F)before per-
forming this step. The DEF system will not prime if the tempera-
ture is too low.
A. Connect the DEF pressure line to DEF pump connection (2).
Place the other end of the DEF pressure line into a suitable con-
tainer to collect the DEF.
B. Turn the keyswitch to the ON position. Run the engine and
check that DEF is flowing from the DEF pressure line into the
container.
Note: Do not run the engine for more than 120 seconds.
C. Turn the keyswitch to the OFF position. Remove the DEF pres-
sure line from the container immediately to prevent the DEF being
sucked back into the line when the DEF system purges.
DEF pump
restriction
Result: DEF did not flow from the DEF pressure line into
the container.
Repair: Replace the DEF pump. Refer to the Disassem-
bly and Assembly, Diesel Exhaust Fluid Pump - Remove
and Install for the correct procedure.
Reset the Dosing Control Unit (DCU) and install new
DCU software. Refer to Troubleshooting, ECM Software -
Install (Dosing Control Unit) for the correct procedure
Note: If this repair is part of a warranty claim, refer to
Special Instruction, M0119435
Proceed to Test Step 7.
Result: DEF flowed from the pressure line into the
container.
Proceed to Test Step 4.
4. Check for a Restriction in the DEF Injector
Note: If necessary, move the engine to an area where the ambient
temperature is at least 10° C (50° F) to perform this step. The
DEF system will not prime if the ambient temperature is too low.
A. Connect the DEF pressure line and the DEF return line to the
DEF injector. Place the other end of the DEF return line into a suit-
able container to collect the DEF.
B. Turn the keyswitch to the ON position. Run the engine and
check that DEF is flowing from the DEF pressure line into the
container.
Note: Do not run the engine for more than 120 seconds.
C. Turn the keyswitch to the OFF position. Remove the DEF pres-
sure line from the container immediately to prevent the DEF being
sucked back into the line when the DEF system purges.
DEF injector
restriction
Result: DEF did not flow from the DEF return line into
the container.
Repair: Install a replacement DEF injector. Refer to Dis-
assembly and Assembly for the correct procedure.
Proceed to Test Step 5.
Result: DEF flowed from the return line into the
container.
Proceed to Test Step 6.
(continued)
UENR4469-36 105
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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