(Table 119, contd)
Troubleshooting Test Steps
Values Results
12. Check the Coolant Level
A. Check the coolant level in the engine cooling system. Refer to
Operation and Maintenance Manual, Coolant Level - Check.
Coolant level Result: The coolant level is low and a leak is identified.
Repair: Repair the coolant leak and fill the coolant sys-
tem to the correct level.
Result: The coolant level is low and no leaks are
identified.
Repair: Fill the coolant system to the correct level.
Result: The coolant level is correct.
Proceed to Test Step 13.
13. Inspect the NOX Reduction System (NRS) Cooler
A. Perform a leak test on the NRS cooler. Refer to Systems Oper-
ation, Testing and Adjusting, Exhaust Cooler (NRS) - Test.
NRS cooler leak Result: An internal leak is identified in the NRS cooler.
Repair: Install a replacement NRS cooler. Refer to Dis-
assembly and Assembly, Exhaust Cooler (NRS) - Re-
move and Install.
Use the electronic service tool to perform the “Aftertreat-
ment System Functional Test” .
If the “Aftertreatment System Functional Test” is success-
ful, return the unit to service.
If the “Aftertreatment System Functional Test” fails, con-
tact the DSN.
The NRS cooler does not have any internal leaks and the
fault is still present.
Proceed to Test Step 14.
14. Perform the ““Air System Motor Valves Verification Test””
A. Operate the engine for enough time to allow the engine to reach
normal operating temperature.
B. Use the electronic service tool to perform the “Air System Motor
Valves Verification Test” .
Test passed Result: The “Air System Motor Valves Verification Test”
is successful.
Return the engine to service.
Result: An E1263 (2) or E1121 (2) code is still active, re-
place the suspect valve. Refer to Disassembly and As-
sembly for more information.
If a fault is still present, contact the DSN.
15.Check the Compatibility of the NOx Sensors
A. Check for correct part numbers of both the Tailpipe Out and En-
gine Out NOx sensors that are fitted.
NOx sensors Result: The NOx sensors are not an approved part.
Repair: Replace the NOx sensors with approved parts.
Result: The NOx sensors are an approved part and the
fault is still present.
Contact the DSN.
UENR4469-36 225
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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