GASKET-PLUG 4M1832 - Caterpillar

System Operation Description:When the Engine Control Switch (ECS) is in AUTO mode and the Start Aid Switch (SAS) is in the OFF position, the engine uses an Automatic Ether System to improve starting in cold temperatures. The system automatically injects ether during the crank cycle. The duration of the ether cycle is based on the engine coolant temperature. The Electronic Control Module (ECM), which controls the ether system, uses the engine coolant temperature sensor to detect engine temperature. The ECM determines if ether should be injected by monitoring actual engine rpm and the engine temperature. The ECM will activate the ether solenoid if the engine coolant temperature is below a set temperature and the engine rpm is below a certain level. The ether will activate for a minimum of 15 seconds at 30 °C (86 °F) up to a maximum of 130 seconds at −50 °C (−58 °F). The automatic ether injection system is disabled whenever engine rpm exceeds 400 rpm or the engine coolant temperature exceeds 30 °C (86 °F).The ether injection system can also be operated in manual mode when the SAS is held in the ON position (momentary contact). The ether system is switched into manual mode whenever the starting aid switch is depressed. Manual mode also allows ether to be injected whenever the coolant temperature is less than 30 °C (86 °F) and engine rpm is greater than 50 rpm. Ether is injected in manual mode if the starting aid switch is depressed and the coolant temperature is below the maximum limit. The manual mode will allow ether to be injected for a maximum of 130 seconds when the switch is toggled. The manual ether injection system is disabled whenever engine rpm exceeds 400 rpm or the engine coolant temperature exceeds 30 °C (86 °F).Note: Crank the engine, before you activate the ether injection system in manual mode. Damage to the engine is possible by activating the system when the engine is not turning.Two driver outputs are used from the ECM. The drivers and the relays are used to provide a higher voltage signal that will actuate the ether solenoids. A lower voltage signal is then used to hold the ether solenoid valves open. The solenoids will be damaged if battery voltage is applied continuously.Note: The Generator Set has a jumper wire between terminals 6 and 9 on the Engine Control Switch (ECS). This jumper wire provides power to the Generator Set Control (GSC+) when the battery disconnect switch is closed and the ECS is in the OFF/RESET position. Unless a timer is installed in the circuit, this jumper wire also provides power to the key switch input of the engine ECM when the battery disconnect switch is closed and the ECS is in the OFF/RESET position. The timer interrupts power to the key switch input of the engine ECM when the battery disconnect switch is closed and the ECS is in the OFF/RESET position. Cycling power to the key switch input of the