BRACKET ASSEM. 2G8786 - Caterpillar

Use this procedure in order to troubleshoot a high turbocharger turbine inlet temperature or if one of the following event codes is active.
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
Aftercooler
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 Aftercooler
A. Normal intake manifold pressure with high exhaust temperature can be caused by blockage of the fins of the aftercooler core.
Aftercooler
Result: The aftercooler is OK.
Proceed to the next step.
Result: The aftercooler is NOT OK.
Repair: Clear restrictions and replace aftercooler or any damaged lines.
If the problem is not resolved, proceed to the next step.
4. 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