(Table 138, contd)
Troubleshooting Test Steps
Values Results
3. Check the Exhaust System
A. Check the exhaust system for gas leaks between the Exhaust
Back Pressure Regulator (EBPR) and the exhaust tail pipe.
B. Check for gas leaks around the following items in the Clean
Emissions Module (CEM):
· Soot antennas (if equipped)
· Temperature sensors
· SCR inlet NOx sensor
· DEF injector
C. Check for signs of internal exhaust gas leaks on the outer cas-
ing of the CEM.
D. Check for missing or damaged exhaust system insulation.
E. Make sure that the exhaust piping between the EBPR and the
CEM is no longer than 1.83 m (6 ft).
F. Make sure that the cooling air flow over the CEM is not exces-
sive for the ambient conditions.
Exhaust System Result: The exhaust system or the CEM has a gas leak.
Repair: Make the necessary repairs.
For engines that have a DPF, proceed to Test Step 4.
For engines that do not have a DPF, proceed to Test Step
5.
Result: The exhaust system insulation is damaged or
missing.
Repair: Make the necessary repairs.
For engines that have a DPF, proceed to Test Step 4.
For engines that do not have a DPF, proceed to Test Step
5.
Result: Review and correct the routing of the exhaust
system. If necessary, consult the Dealer Solutions Net-
work (DSN) for further advice.
For engines that have a DPF, proceed to Test Step 4.
For engines that do not have a DPF, proceed to Test Step
5.
Result: There is excessive cooling air flow over the
CEM.
Repair: Reduce the cooling air flow. If necessary, consult
the Dealer Solutions Network (DSN) for further advice.
For engines that have a DPF, proceed to Test Step 4.
For engines that do not have a DPF, proceed to Test Step
5.
4. Check the SCR Catalyst Temperature
Note: This test step is only applicable to engines that have a DPF.
A. Connect to the electronic service tool.
B. Run the engine.
C. Perform the “Manual Hydrocarbon Dosing Capability Test” .
Manual hydro-
carbon dosing
capability test
Result: The “Manual Hydrocarbon Dosing Capability
Test” completed successfully.
Return the unit to service.
Result: The “Manual Hydrocarbon Dosing Capability
Test” failed. An error identifier is generated by the elec-
tronic service tool.
Repair: Troubleshoot the error identifier. Refer to Trou-
bleshooting, “Service tool Error Identifiers”. Repeat Test
Step 3.
Result: The “Manual Hydrocarbon Dosing Capability
Test” failed. No error identifiers are generated.
Contact the Dealer Solutions Network (DSN).
(continued)
UENR4469-36 257
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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