CUP 2346490 - Caterpillar

Table 1
Diagnostic Codes for NRS Exhaust Gas Temperature Is High    
CDL Code    Code Description    Comments    
E1092-1     High Engine Exhaust Gas Recirculation Temperature - Warning     The exhaust gas temperature in the NRS has reached
178° C (352° F) for 8 seconds.
The ECM has been powered for at least 2 seconds.
The engine has been running for at least 180 seconds.
There are no electrical faults on the circuit.    
E1092-2     High Engine Exhaust Gas Recirculation Temperature - Derate     The exhaust gas temperature in the NRS has reached
180° C (356° F) for 8 seconds.
The engine will be derated.
The ECM has been powered for at least 2 seconds.
The engine has been running for at least 180 seconds.
There are no electrical faults on the circuit.    
Illustration 1 g02116054
Components of the NRS cooler (1) Coolant inlet (2) Exhaust inlet (3) NRS cooler (4) Exhaust outlet (5) Coolant outletTest Step 1. Check for Associated Diagnostic Trouble Codes
Establish communication between the electronic service tool and the ECM. If necessary, refer to Troubleshooting, "Electronic Service Tools".
Determine if an associated code is active or logged. Table 2 lists associated diagnostic codes.
Table 2
Associated Codes    
J1939 Code     Description    
E361-1     High Engine Coolant Temperature - Warning    
E361-2     High Engine Coolant Temperature - Derate    
E361-3     High Engine Coolant Temperature - Shutdown    Results:
There are associated codes. - Repair: Refer to Troubleshooting, "Diagnostic Trouble Codes" in order to troubleshoot the associated diagnostic code.STOP
A E1092 code and a E1319-2 code are present. - Proceed to Test Step 3.
There are no associated codes. - Proceed to test step 2.Test Step 2. Perform an EGR Service Test
Establish communication between the electronic service tool and the ECM.
Select "Diagnostics" from the toolbar at top of screen.
Select "Diagnostic tests" from the drop-down menu.
Select "EGR Service Test".Results:
The EGR service test did not complete due to a E1092-2 code. - Repair: Remove the exhaust inlet and the exhaust outlet from the NRS cooler. Inspect the internal passage of the NRS cooler for evidence of coolant. If coolant is found, replace the NRS cooler. Return the unit to service. STOP
The EGR service test completed successfully. - Proceed to Test Step 3.Test Step 3. Inspect the NRS Cooler
Remove the NRS cooler. Refer to Disassembly and Assembly, "Exhaust Cooler (NRS) - Remove and Install".
Perform a leak test on the NRS cooler. Refer to Systems Operation, Testing and Adjusting, "NRS Cooler - Test".Results:
The NRS cooler has an internal coolant leak. - Repair: Replace the NRS cooler. Refer to Disassembly and Assembly, "Exhaust Cooler (NRS) - Remove and Install". Return the unit to service.STOP
The NRS cooler does not have an internal coolant leak. - Repair: Perform the following procedure:
Install the NRS cooler. Refer to Disassembly and Assembly, "Exhaust Cooler (NRS) - Remove and Install".
Use the electronic service tool to clear all related diagnostic trouble codes.
Run the engine and ensure that the fault has been eliminated.STOP