DDEC III/IV Single ECM Troubleshooting

Section 37.1 Description of Flash Code 37

Section 37.1
Description of Flash Code 37

Flash Code 37 indicates that the engine Fuel Pressure Sensor (FPS) , see Figure "Fuel Pressure Sensor" , or Fuel Restriction Sensor (FRS),see Figure "Fuel Filter Restriction Sensor" , input to the ECM has exceeded 95% (normally > 4.75 volts) of the sensor supply voltage.‪

This diagnostic condition is typically:‪

  • Open sensor return circuit
  • Sensor signal circuit is shorted to the sensor +5 volt supply
Click to see this graphic in a separate window

Figure 1. Fuel Filter Restriction Sensor


DDEC III/IV Single ECM Troubleshooting Guide - 6SE497
Generated on 10-13-2008

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