PISTON & ROD GP 8N2531 - Caterpillar

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Illustration 1 g00481066
System Schematic For Engine Control Switch (ECS)The Engine Control Switch (ECS) is used by the operator for manually controlling the engine. The ECS has four positions and each position connects to a corresponding input of the GSC. The selected position of the ECS connects the corresponding input of the GSC to ground ("B-"). At any time, only one of these four positions (inputs) is connected to ground ("B-"). Each position of the ECS places the engine in a different mode. The following information contains the four positions and the corresponding engine modes. OFF/RESET - The engine is shut down and the GSC is reset. The upper display and the fault indicators on the left side are temporarily cleared. The GSC turns OFF unless a jumper is installed from terminal 6 of the ECS to terminal 9 of the ECS. AUTO - The engine will start when the customer's remote start/stop contact closes the start input on the GSC to the ground ("B-"). the engine will start. The engine starts when the customer communication module (CCM) sends a remote start command. At this time, the GSC starts the engine and the engine runs normally until the remote start/stop contact opens. The engine stops when the customer communication module (CCM) sends a remote signal to stop. Then, the engine enters a time of cooldown before the engine is shut down. The GSC shows faults on the upper display and on the fault indicators as the faults occur. The GSC is ON with the ECS in this position.MAN/START - The engine starts and runs until the operator turns the ECS to OFF/RESET, to COOLDOWN/STOP or until the GSC detects a fault shutdown. The GSC shows faults on the upper display and on the fault indicators as the faults occur. The GSC is ON with the ECS in this position.COOLDOWN/STOP - The engine maintains rated speed for the cooldown period (programmable 0 to 30 minutes). After the cooldown period elapses, the engine is shut down. The GSC shows faults on the upper display and on the fault indicators as the faults occur. The GSC is ON with the ECS in this position.Note: The remote start/stop contacts are connected to the GSC start input via the terminal TS1-14 in the generator housing. Before troubleshooting, disconnect the remote start contacts by removing the wire from terminal TS1-14. Note: Diagnostic codes are created when the harness connector (40 contact) is disconnected from the GSC during these troubleshooting procedures. Clear these created faults after the particular fault is corrected. 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 190 FMI 3 speed sensor (engine)
CID 336 FMI 2 switch (engine control)
CID 590 FMI 9 engine ECMProcedureThe following conditions could be a possible cause of this diagnostic code:
None of the inputs for