DDEC III/IV Single ECM Troubleshooting

Section 38.1 Description of Flash Code 38

Section 38.1
Description of Flash Code 38

Flash Code 38 indicates that the engine Fuel Pressure Sensor (FPS), see Figure "Fuel Pressure Sensor" , / Fuel Restriction Sensor (FRS), see Figure "Fuel Filter Restriction Sensor" , input to the ECM has dropped below 5% (normally < 0.25 volts) of the sensor supply voltage. ‪

This diagnostic condition is typically:‪

  • Open sensor signal circuit
  • Open sensor +5 volt supply circuit
  • Sensor signal is shorted to sensor return circuit or to ground
  • Sensor +5 volt supply is shorted to the sensor return circuit
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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