FITTING GP-EXHAUST 3843623 - Caterpillar

Illustration 1 g00629679
The EMCP II+ has an sensor supply that is 8 DCV. The sensor supply from the GSC+ powers the following engine sensors:
oil pressure
oil temperature
coolant temperature
coolant fluid levelThe engine oil temperature sensor is optional. The engine coolant level sensor is an optional item.The sensor power supply functions whenever power is applied to the GSC+.The GSC+ is programmed in the factory to treat a fault with the sensor power supply CID 269 as an alarm fault P004. P004 = 0. If the GSC+ is programmed to shutdown, P004 is equal to 1 for a fault with the sensor power supply. It is not necessary to press the "Alarm Codes" key in order to view the CID 269 FMI 4. The CID 269 FMI 4 is automatically shown on the upper display.Faults are created when the harness connector is disconnected from the GSC+ during these troubleshooting procedures. Clear these created faults after the particular fault is corrected and the particular fault is cleared. In a properly operating system, when the harness connector is removed from the GSC+, the following diagnostic fault codes are recorded.CID 100 FMI 2 - Pressure Sensor (Engine Oil) CID 110 FMI 2 - Temperature Sensor (Engine Coolant)CID 111 FMI 3 - Fluid Level Sensor (Engine Coolant)CID 175 FMI 3 - Temperature Sensor (Engine Oil)CID 190 FMI 3 - Speed Sensor (Engine)CID 336 FMI 2 - Switch (Engine Control)CID 590 FMI 9 - Engine (ECM)The possible cause of a CID 269 FMI 4 fault occurs when the voltage of the sensor supply is less than 7.5 DCV.Begin performing these procedures only when CID 269 FMI 4 is showing and the "DIAG" indicator is FLASHING on the upper display. The GSC+ treats a CID 269 FMI 4 fault as an alarm fault. Active alarm faults are shown on the display when the "Alarm Codes" key is pressed and the engine control switch (ECS) is in any position except the OFF/RESET position. For an inactive fault, the problem may be intermittent. In order to troubleshoot an inactive fault, use the preceding system schematic and see Testing And Adjusting, "Electrical Connector - Inspect". Clear the fault from the fault log after troubleshooting is complete.
Check The GSC+.
Turn the ECS to OFF/RESET.
Disconnect the harness connector from the GSC+.
Turn the ECS to STOP.
Press the "Alarm Codes" key.
Observe the upper display for the CID 269 FMI 4 fault. If the fault is showing then the fault is active.Expected Result: The CID 269 FMI 4 fault should NOT be showing on the upper display.Results:
OK: The GSC+ is functioning properly. Therefore, the engine harness or a sensor is faulty. Proceed to Step 2.
NOT OK: The GSC+ is faulty. Replace the GSC+. See Testing And Adjusting, "EMCP Electronic Control (Generator Set) - Replace". STOP.
Check The Oil Pressure Sensors.
Turn the ECS to OFF/RESET.
Reconnect the harness connector to the GSC+.
Disconnect the engine harness from the oil pressure sensor.
Turn the ECS to STOP.
Press the "Alarm Codes" key.
Observe the upper display for the CID 269 FMI 4 fault.Expected Result: If the