MANIFOLD 1118277 - Caterpillar

Use this section for the troubleshooting of problems that have generated event codes but do not have active diagnostic codes. When the event code is generated, the event is active. Any generated code becomes logged in the permanent memory of the Electronic Control Module (ECM) that detected the event.Both the master ECM and the slave ECM can indicate active events. The master ECM will diagnose all of the events that are applicable to G3500 engines that have a single ECM. The events that are diagnosed by the slave ECM are a subset of the events that are diagnosed by the master ECM. All of the events that are pertinent to the slave ECM have the same setting conditions and the same conditions for clearing as the master ECM.Event codes alert the operator that an abnormal engine operating condition such as low oil pressure or high coolant temperature has been detected. Events do not indicate problems with the electronic system. Event codes also indicate the nature of the problem. The Caterpillar Electronic Technician (ET) is designed to run on a personal computer. Event codes may be viewed on a personal computer that has the Cat ET software.Illustration 1 represents the operating range of an oil temperature sensor. The diagram is a reference. Do not use the diagram to troubleshoot the oil temperature sensor.
Illustration 1 g00791619
Typical operating range of an oil temperature sensor (1) In these areas, the output voltage of the sensor is too high or too low. The output is outside of the normal range. The electronic problem will generate a diagnostic code. (2) In this area, the oil temperature above 102 °C (216 °F) is higher than normal. The output voltage of the sensor will generate an event code for a warning or a shutdown for high oil temperature. The sensor does not have an electronic problem. (3) This area represents the normal operating temperature for the engine oil. The normal output voltage of the sensor is between 0.2 and 4.1 volts.The following format is used for event codes:
"EXXX (X) Description of the code"The "E" means that the code is an event code. The "XXX" represents a numeric identifier for the event code. The fourth "(X)" represents a numeric identifier for the severity of the code. This is followed by a description of the code. Refer to the following example:
"E004 (3) Engine Overspeed Shutdown"The numbers that indicate the severity of the event code are defined below:Warning (1) - This condition represents a serious problem with engine operation. However, this condition does not require a shutdown.Shutdown (3) - For this condition, the engine is shut down in order to help prevent possible engine damage.These responses to certain events may be programmed into the ECM. If the responses are programmed, Cat ET can display the event. If the responses are not programmed, the display will not appear. However, the occurrence of any event will cause the event code to be logged in the ECM that detected the event.Note: Do not