Table 117
Troubleshooting Test Steps
Values Results
6. Perform a DEF Dosing System Accuracy Test by Volume
A. Turn the keyswitch to the OFF position.
B. Remove the DEF injector. Refer to Disassembly and Assembly,
DEF Injector and Mounting - Remove and Install.
Note: Leave all lines connected to the DEF injector.
C. Install the DEF injector into Tooling B and Tooling C.
D. Turn the keyswitch to the ON position.
E. Connect to the electronic service tool.
F. Perform the “DEF Dosing System Accuracy Test” . Refer to Sys-
tems Operation, Testing and Adjusting, Aftertreatment SCR Sys-
tem Dosing Test for the correct procedure.
Note: This test takes approximately 7 to 8 minutes and includes
the following phases:
• Priming of the DEF system.
• The dosing test which will take 6 minutes.
• Purging of the DEF system.
The test may need to be performed at least twice as the first test
may be required to clear DEF deposits from the DEF injector tip.
If the test only runs for 1 minute, repeat the test a further 5 times.
Check for evidence of DEF injector drips during prime phase, the
quantity of DEF dosed into the container and the DEF injector
spray pattern during dosing phase.
Refer to Illustration 74 for an example of the DEF injector dripping
during the prime phase.
Refer to Illustration 75 for an example of the DEF dosed quantity.
Refer to Illustration 76 for an example of a good DEF injector
spray pattern.
Refer to Illustration 77 for an example of a poor DEF injector spray
pattern.
105 mL
(3.6 fl oz) to
130 mL
(4.4 fl oz)
Result: The amount of DEF collected was less than
105 mL (3.6 fl oz) and/or the DEF Injector was observed
to drip during the priming phase of the test sequence, or
DEF Injector Spray pattern was not even.
Repair: Install a new DEF injector to the DEF lines and
the electrical connector. Do not install the DEF injector to
the SCR mixer at this stage. Refer to Disassembly and
Assembly, DEF Injector and Mounting - Remove and
Install.
Proceed to Test Step 10.
Result: The amount of DEF collected is within 105 mL
(3.6 fl oz) to 130 mL (4.4 fl oz).
Proceed to Test Step 7.
7. Check the Electrical Connectors
A. Thoroughly inspect the connectors that are associated with the
CAN C data link circuit. Verify that the connectors are free of de-
bris, free of corrosion, and securely connected.
B. Perform a 45 N (10 lb) pull test on all the wires associated with
the CAN C data link circuit.
Electrical
connectors
Result: The connectors were connected correctly and
did not have corrosion or moisture.
Proceed to Test Step 8.
Result: The connectors were not connected correctly or
the connectors have corrosion or moisture.
Repair: Repair the connectors and/or the wiring. Replace
parts, if necessary. The DCU connector is not
serviceable.
Proceed to Test Step 10.
(continued)
UENR4469-36 221
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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