DDEC III/IV Single ECM Troubleshooting

Section 74.1 Description of Flash Code 74

Section 74.1
Description of Flash Code 74

Flash Code 74 indicates that the park brake digital input is shorted to ground between the vehicle interface harness connector and one of the switches (park brake switch, neutral switch, hood switch or optional OEM interlock). ‪

  • If this code is inactive, it may indicate that the vehicle moved during optimized idle operation or that two consecutive engine start attempts were not successful.
  • Flash Code 74 may also indicate that the relay coil is open or is shorted (causing the unsuccessful engine start).


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

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