DDEC III/IV Single ECM Troubleshooting

Section 28.1 Description of Flash Code 28

Section 28.1
Description of Flash Code 28

Flash Code 28 indicates that the engine Air Temperature Sensor (ATS), see Figure "Air Temperature Sensor" , input to the ECM has dropped below 5% (normally < 0.25 volts) of the sensor supply voltage. ‪

This diagnostic condition is typically:‪

  • Sensor signal circuit is shorted to sensor return
  • Sensor signal circuit is shorted to ground


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

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