DDEC III/IV Single ECM Troubleshooting

Section 46.1 Description of Flash Code 46

Section 46.1
Description of Flash Code 46

Flash Code 46 indicates that the DDEC system has detected that the main battery supply voltage to the ECM has dropped below the recommended operating range.‪

The DDEC system will operate on 12 or 24 volts. ‪

  • Normal operating voltage of the DDEC system is 11 to 32 volts DC, measured at the ECM.
  • Operating the ECM between 6 and 11 volts may result in degraded engine operation. (Transient operation in this range during engine starting is considered normal for 12-volt systems.)
  • Operating the ECM over 32 volts will cause damage.
  • Reversing polarity will cause damage to the ECM if the power harness is not properly fused.


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

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