SHIM 2330375 - Caterpillar

Table 1
Event Code
Description Conditions which Activate the Code System Response
E401(1) Cylinder #1 Detonation The level of detonation has exceeded the trip point. The code is logged.
The alarm output is activated.
Engine timing is retarded in order to reduce detonation.
E402(1) Cylinder #2 Detonation
E403 (1) Cylinder #3 Detonation
E404 (1) Cylinder #4 Detonation
E405(1) Cylinder #5 Detonation
E406(1) Cylinder #6 Detonation
E407(1) Cylinder #7 Detonation
E408(1) Cylinder #8 Detonation
E409(1) Cylinder #9 Detonation
E410(1) Cylinder #10 Detonation
E411(1) Cylinder #11 Detonation
E412(1) Cylinder #12 Detonation
E413(1) Cylinder #13 Detonation
E414(1) Cylinder #14 Detonation
E415(1) Cylinder #15 Detonation
E416(1) Cylinder #16 Detonation
E417(1) Cylinder #17 Detonation
E418(1) Cylinder #18 Detonation
E419(1) Cylinder #19 Detonation
E420(1) Cylinder #20 Detonation
Table 2
Event Code
Description Conditions which Activate the Code System Response
E401(3) Cylinder #1 Detonation The level of detonation has exceeded the trip point for engine shutdown.
Maximum retardation of the timing was unable to control the detonation adequately during the number of ignition sparks that are allowed. The code is logged.
The shutdown output is activated.
The engine is shut down.
E402(3) Cylinder #2 Detonation
E403 (3) Cylinder #3 Detonation
E404 (3) Cylinder #4 Detonation
E405(3) Cylinder #5 Detonation
E406(3) Cylinder #6 Detonation
E407(3) Cylinder #7 Detonation
E408(3) Cylinder #8 Detonation
E409(3) Cylinder #9 Detonation
E410(3) Cylinder #10 Detonation
E411(3) Cylinder #11 Detonation
E412(3) Cylinder #12 Detonation
E413(3) Cylinder #13 Detonation
E414(3) Cylinder #14 Detonation
E415(3) Cylinder #15 Detonation
E416(3) Cylinder #16 Detonation
E417(3) Cylinder #17 Detonation
E418(3) Cylinder #18 Detonation
E419(3) Cylinder #19 Detonation
E420(3) Cylinder #20 Detonation Probable Causes
Excessive load
Excessive inlet air pressure
High inlet air temperature
Incorrect air/fuel ratio
Incorrect base timing
Changes in the fuel quality
Incorrect timing calibration
Faulty circuit for the detonation sensor
Excessive deposits in the combustion chamber
Cylinder misfireRecommended Actions
Excessive Load
Ensure that the load is not excessive. Reduce the load. If necessary, disengage the driven equipment and test the engine.Excessive Inlet Air Pressure
The calculated engine load will increase as the inlet air pressure increases. The pressure could cause the air/fuel ratio for the engine to become lean. This condition could cause the engine to misfire on some cylinders. As the other cylinders pick up the load, detonation may occur due to the excess load. Check the setting for the turbocharger compressor bypass valve. Perform the necessary adjustments.Measure the inlet air pressure during engine operation with a load. For specific data on the engine, refer to the performance data sheet for the engine.High Inlet Air Temperature
High inlet air temperature can cause detonation. Check the inlet air temperature. Check for a restriction to the air flow through the aftercooler. Look for event codes that are related to a high inlet air temperatureRefer to Troubleshooting, "Inlet Air Temperature Is High".Incorrect Air/Fuel Ratio
An air/fuel mixture that is too rich will cause detonation. Verify that the exhaust emissions are correct. Refer to Systems Operation/Testing and Adjusting, "Air/Fuel Ratio Control - Adjust".A change in the fuel energy content will change the air/fuel ratio. Obtain a fuel analysis.If the fuel analysis is as expected, inspect the NOX sensor port in the flower pot for plugging. If necessary, clean the port. If the problem persists, refer to Troubleshooting, "Detonation Occurrence".The fuel supply pressure must be 876 to 1289 mbar absolute or 12.705 to 18.695 PSI. The gas differential pressure (delta-p) should be between