WIRING GP-RELAY PANEL 0700337 - Caterpillar

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Coolant monitoring circuitThe components of the coolant monitoring circuit are the Engine Electronic Control Module (Engine ECM), the Caterpillar Monitoring System ECM, the engine coolant temperature sensor, the coolant flow switch, the coolant level sensor, and the gauge module.
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Left side view of engine (1) Engine ECM
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Dash panel (2) Caterpillar Monitoring System ECM (behind display) (3) Engine coolant level alert indicator
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Right side view of engine (4) Engine coolant temperature sensor
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Right side view of engine (5) Coolant flow switch
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View of header tank (6) Coolant level sensor
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Dash panel (7) Coolant temperature gauge (8) Gauge moduleWith the key start switch in the ON position, 24 volt power is supplied from the batteries via circuit breaker #1 to the Caterpillar Monitoring System ECM. Power is supplied from batteries via circuit breaker #11 to the Engine ECM. The Engine ECM supplies 5 volt power to the engine coolant temperature sensor and to the coolant level sensor.Engine coolant temperature sensor (4) sends a signal to Engine ECM (1). The Engine ECM sends a signal via the CAT Data Link to Caterpillar Monitoring System ECM (2). The Caterpillar Monitoring System ECM sends a signal to gauge module (8). The gauge module indicates the engine coolant temperature on coolant temperature gauge (7) .Coolant level sensor (6) and coolant flow switch (5) send a signal to the Engine ECM. The Engine ECM monitors the state of the coolant. The Engine ECM sends the coolant level condition to the Caterpillar Monitoring System ECM. Engine coolant level indicator (3) will illuminate if the coolant level is not within specification. If the coolant level sensor or the coolant flow switch is out of range for the engine requirements, the Engine ECM will begin timing the condition. The Engine ECM monitors the condition of the sensor and the switch and will derate the engine or shut the engine down depending on the severity of the conditions.