MANIFOLD GP-EXHAUST 1899987 - Caterpillar

Engine Control Module (ECM)
The right side of the control panel contains the engine control module (ECM). This is the "brain" of the system, and also displays fault conditions and key engine parameters. Pressing the display hold switch allows the operator to hold the display of any particular engine parameter required. To resume scanning, the display hold switch is pressed again.The ECM accepts information from the operator, magnetic pickup, oil pressure and water temperature transducer, and optional remote sources. This information is used to determine the "on/off" state of the engine's air, fuel, and starter.In the very basic operating conditions, the ECM receives a signal to run the generator set. The ECM turns on the engine's fuel and starter. When the engine speed reaches the crank termination speed, the starter is disengaged. When the ECM receives a signal to stop the engine, it shuts the fuel off.* Cycle Crank - The ECM can be programmed to crank-rest crank etc. for adjustable time periods. Refer to the Service Manual Module SENR3903, which is included in the Service Manual SENR7958 for programming instructions.* 2301 or 2301A Control - When the engine oil pressure increases past the low oil pressure set point, the ECM will indicate to the governor that it should increase engine speed from IDLE to RATED rpm.* Cool Down - Upon receiving a signal to perform a normal shutdown, the ECM will wait a preprogrammed amount of time before shutting the engine down by means of the fuel control.* Automatic Operation - While in the automatic mode, the ECM can be started by a remote initiate signal (contact closure). Upon loss of the signal (contact opening), the ECM will perform a normal shutdown.* Alarm Module Communication - The ECM can transmit fault and alarm conditions to an alarm module.* Power Down - The Electronic Modular Control Panel (EMCP) system is designed to remove power from the ECM when in the off/reset mode, if the proper jumper is removed. The ECM will not allow the power down until the crank termination relay and the fuel control relay are both "off" for about 70 seconds. If the jumper has not been removed, it will remain powered up.Refer to the Service Manual Module SENR3903 for the wiring schematic and the jumper wire location.* Fuel Solenoid Type - The ECM can be programmed to work with either an energized to run (ETR) fuel system or an energized to shutdown (ETS) fuel system. * LED Display - Six LEDs (light emitting diodes) are located on the front of the ECM to annunciate overcrank shutdown, overspeed shutdown, low oil pressure shutdown, high coolant temperature shutdown, emergency stop, and reverse power shutdown. The reverse power LED can be used as a spare fault indication when the reverse power relay option is not used. * Emergency Stop - If the ECM detects an emergency stop, the engine will shut down by means of the fuel control and the Emergency Stop LED will flash. *