PISTON 9T5805 - Caterpillar

Cat Monitoring System
The engine is equipped with a programmable Cat Monitoring System. The Electronic Control Module (ECM) monitors the operating parameters of the engine. The ECM can initiate responses if a specific engine parameter exceeds an acceptable range. Three possible responses may be available for each parameter: "", "DERATE" and "SHUTDOWN". Some of the responses are not available for some of the parameters. An ET service tool is used to perform the following activities:
Select the available responses.
Program the level for monitoring.
Program delay times for each response.The default settings for the parameters are programmed at the factory. To accommodate unique applications and sites, the parameters may be reprogrammed with an ET service tool.The screens of the ET service tool provide guidance for the programming. The following options can be programmed "ON" or "OFF": "", "DERATE" and "SHUTDOWN".The screens of the ET service tool also provide guidance for changing setpoints.The Cat Monitoring System is enabled after the engine is started. When the engine rpm exceeds 50 rpm below low idle, the ECM begins checking parameters. The ECM monitors the parameters in order to determine if the parameters exceed the setpoints.If the monitoring system initiates a warning, a deration, or a shutdown, the event is logged into the ECM. This procedure occurs even if the parameter is programmed "OFF". If a setpoint for a parameter is exceeded, the event will be logged.Any failure of a sensor will result in disabling the corresponding portion of the monitoring system. The failure of a sensor will cause an "ACTIVE" diagnostic code for the sensor. For information on programming and default setpoints for the Cat Monitoring System, use the appropriate ET service tool and see the Service Manual, "Troubleshooting" module.