The Fire Truck Pump Pressure Sensor is used with the DDEC IV pressure sensor governor. It provides a fire truck pump pressure signal to the ECM, which modulates engine fueling to maintain a constant fire truck pump pressure. See Figure 3-41. The pressure sensor is capable of reading up to 400 psia and is located in the water pump discharge manifold.
The fire truck pump pressure sensor connector, listed in Table 3-11, is a Metri-Pack 150 series pull-to-seat connector.
See Figure 3-42 for the installation of the fire truck pump pressure sensor.
