SEAL-WATER PUMP 3492654 - Caterpillar

System Operation Description:The ECM controls the ether system. The ether system has two operating modes. The ether system can operate in AUTO mode and in MANUAL mode. The engine coolant temperature and the engine rpm is used to determine ether injection. AUTO ether injection will activate for a minimum of 15 seconds at 300 °C (572 °F) and a maximum of 130 seconds at 500 °C (932 °F). AUTO ether injection is disabled whenever engine rpm exceeds 400 RPM or the engine coolant temperature exceeds 300 °C (572 °F).MANUAL mode delivers ether to the engine when the Starting Aid Switch is placed in the MANUAL position. The manual position allows the ether to be injected when the engine rpm is greater than 50 RPM and the coolant temperature is less than 300 °C (572 °F). The MANUAL mode will allow ether to be injected for a maximum of 130 seconds when the switch is toggled.Two driver outputs are used from the ECM. One output provides +Battery to one terminal of the Ether Start relay. The other terminal is connected to the Digital Return. The other output connects one terminal of the Ether Hold Relay to -Battery and the other terminal to +Battery. The drivers and the relays are used to provide a voltage signal. The voltage signal is used to actuate the solenoids. A lower voltage signal is used to hold the Ether solenoid valves open. The solenoids will be damaged if battery voltage is applied continuously.
Illustration 1 g00598816
Test Step 1. Check for Connector Damage.
Check the circuit breakers.
Turn the circuit breaker for the battery to the OFF