DDEC III/IV Single ECM Troubleshooting

Section 12.1 Description of Flash Code 12

Section 12.1
Description of Flash Code 12

Flash Code 12 indicates that the Variable Speed Governor (VSG) 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
  • Throttle sensor not adjusted properly at full throttle


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

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