SENSOR AS-SONIC 5412488 - Caterpillar

Table 1
Event Code
Code and Description Conditions which Generate this Code System Response
E245(1) High Right Turbo Turbine Inlet Temperature The exhaust temperature is above the trip point temperature. The code is logged.
E245(2) High Right Turbo Turbine Inlet Temperature The engine is derated. The code is logged.
E245(3) High Right Turbo Turbine Inlet Temperature The code is logged.
The engine is shut down.
E246(1) High Left Turbo Turbine Inlet Temperature The exhaust temperature is above the trip point temperature. The code is logged.
E246(2) High Left Turbo Turbine Inlet Temperature The engine is derated. The code is logged.
E246(3) High Left Turbo Turbine Inlet Temperature The code is logged.
The engine is shut down. If the engine is shut down due to a high turbocharger turbine inlet temperature, the power to the engine Electronic Control Module (ECM) must be cycled in order to restart the engine.Probable Causes
Diagnostic codes and event codes
Inlet air temperature is high
Exhaust temperature is high
Fuel injectorsRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Product Status Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
C. Determine if the diagnostic trouble code that directed to this procedure is present.
D. Look for active diagnostic codes that are associated with the system for the event code that directed to this procedure.
E245
E246
Result: An associated code is present.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: An E245 or E246 code is present.
Proceed to the next step.
Result: No active codes
STOP
2. Check for High Inlet Air Temperature
Refer to Troubleshooting, "Inlet Air Temperature Is High".
A one degree increase in the inlet manifold temperature will increase the exhaust temperature by approximately three degrees.
Inlet air
temperature
Result: The inlet air temperature is OK.
Proceed to the next step.
Result: The inlet air temperature is NOT OK.
Repair: Determine the cause of the high inlet air temperature and correct the problem.
If the problem is not resolved, proceed to the next step.
2. Check for High Exhaust Temperature
Refer to Troubleshooting, "Exhaust Temperature Is High".
Exhaust
temperature
Result: The exhaust temperature is OK.
Proceed to the next step.
Result: The exhaust temperature is NOT OK.
Repair: Determine the cause of the high exhaust temperature and correct the problem.
If the problem is not resolved, proceed to the next step.
3. Check the Fuel Injectors
Faulty injectors that deliver too much fuel will increase exhaust temperatures.
A. Connect Cat ET in order to determine if any diagnostic codes for the injector solenoids are present.
B. Perform the "Injector Solenoid Test". Check that the injector solenoids are "OK" on Cat ET.
C. Perform the "Cylinder Cutout Test". Locate the misfiring cylinder and correct the problem.
D. Perform the "Fuel System Verification Test". Identify any problem injectors and perform the necessary repairs.
Refer to Troubleshooting, "Injector Solenoid - Test".
Leak
Result: The injectors are NOT OK.
Repair: Repair or replace the faulty injectors.