RENR5042-02 47 Troubleshooting Section Event codes Determine the type of throttle that is used in the application. Program the parameters to match the type of throttle that is used. Refer to Troubleshooting, “Throttle Position Sensor Circuit - Test” for more information. Engine rating Programmable parameters Cold mode Note: The engine will have poor performance if the parameters are not programmed correctly. Altitude derate Electrical connectors Cold Mode Monitor the status screen on Cat ET in order to verify that the engine has exited cold mode. Observe the reading for coolant temperature on Cat ET. The engine should exit cold mode whenever the coolant temperature is above 18 °C (64 °F).
PTO enable switch Intermediate speed switch Throttle signal Circuit for electronic unit injectors Altitude Derate Fuel supply The engine may be derated due to high elevation. Connect Cat ET to the service tool connector. Check for an active engine derate on the status screens. Boost pressure sensor (intake manifold air), rated fuel position and/or FRC fuel position Note: There are no event codes that are associated with the altitude derate. Air inlet and exhaust system Recommended Actions Electrical Connections to the Electronic Control Module (ECM) Note: If the problem only occurs under certain conditions, test the engine under those conditions.
Examples of certain conditions are high rpm, full load and engine operating temperature. Troubleshooting the symptoms under other conditions can give misleading results. Check the associated wiring for damage, abrasion, corrosion or incorrect attachment on the following connectors. J1/P1 and J2/P2 ECM connectors, J61/P61 customer connector (optional), and J403/P403 throttle position sensor connector. Refer to Troubleshooting, “Electrical Connectors - Inspect” for additional information. Diagnostic Codes and Event Codes Certain diagnostic codes and/or event codes may cause poor performance. Connect the Caterpillar Electronic Technician (ET) and check for active codes and for logged codes.
Troubleshoot any codes that are present before continuing with this procedure. PTO Enable Switch Connect Cat ET and verify that the “PTO Enable Switch” is “Not Engaged”. If the value of the parameter does not match the position of the switch, there is a problem with the circuit for the PTO enable switch. Refer to Troubleshooting, “Switch Circuits - Test”. Engine Rating Verify that the correct engine rating is being used for the application. If the value of the “PTO Enable Switch” parameter matches the position of the switch, continue to next step. Programmable Parameters Intermediate Speed Switch Check the following parameters on Cat ET:
Verify that the value of the “Intermediate Speed Switch” matches the position of the switch. If the value of the parameter does not match the position of the switch, there is a problem with the circuit for the switch for the intermediate speed. Refer to Troubleshooting, “Switch Circuits - Test”. Throttle Position Sensor Desired Speed Input Configuration Direct Fuel Control Mode Verify that the injector trim files are programmed.