(Table 212, contd)
Troubleshooting Test Steps
Values Results
3. Check the Type of Diagnostic Code that is Active
A. Turn the keyswitch to the ON position. Wait at least 10 seconds for
activation of the diagnostic codes.
B. Use the electronic service tool to check for active diagnostic co-
des. Record all active diagnostic codes.
Diagnostic
codes
Result: A 157–12 diagnostic code is active.
Repair: If this code is active when the engine is crank-
ing but not starting, use the electronic service tool to
check the speed/timing sensor status on the “Engine
Starting” screen. If the status of the speed/timing sen-
sors is “Not Detected” , refer to Troubleshooting,
Speed/Timing - Test to diagnose the speed/ timing sen-
sor fault.
If the speed/timing sensor circuit is OK, replace the fuel
rail pressure sensor. Refer to Disassembly and Assem-
bly for the correct procedure.
Result: A 411-2 code is active.
Proceed to Test Step 4.
Result: An alternative XXXX-2 diagnostic code is ac-
tive for one or more of the active sensors.
Repair: Replace the suspect sensor.
Use the electronic service tool to clear all logged diag-
nostic codes. Return the unit to service.
Result: An XXXX-3 diagnostic code is active for one or
more of the active sensors.
Proceed to Test Step 5.
Result: An XXXX-4 diagnostic code is active for one or
more of the active sensors.
Proceed to Test Step 6.
4. Diagnose a 411-2 Code
A. Remove the exhaust inlet pipe and the exhaust outlet pipe from
the NRS cooler. Refer to Disassembly and Assembly, Exhaust Cooler
(NRS) - Remove and Install.
B. Inspect the inlet port and the outlet port of the NRS cooler for ex-
cessive fouling with condensate and/or soot.
Note: A light coating of soot is normal. There must be no evidence of
wet or shiny condensate fouling or excessive soot deposits that cover
most of the internal tubes.
Diagnostic
Codes
Result: The NRS cooler has excessive fouling.
Replace the NRS cooler. Refer to Disassembly and As-
sembly, Exhaust Cooler (NRS) - Remove and Install.
Verify that the problem is resolved.
If the fault is still present, contact the Dealer Solutions
Network (DSN).
Result: The NRS cooler does not have excessive
fouling.
Install a replacement NRS differential pressure sensor.
Refer to Disassembly and Assembly, Pressure Sensor
(Cooled Exhaust Gas) - Remove and Install.
Verify that the problem is resolved.
If the fault is still present, contact the Dealer Solutions
Network (DSN).
(continued)
388 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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