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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 63 (Power Distribution Module Diagnosis (HEV)) >> DTC B1987: Sub Micom Failed >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • NEC MCU Communication Check
  1. Short to ground/power or open in communication circuit of NEC MCU inside PDM
  2. Replace PDM (In case It is unable to verify the cause.)
Enable Conditions
  • PDM power on
Threshold Value
  • Communication error
Diagnostic Time
  • Immediately
DTC Erasing Time
  • DTC is erased immediately after trouble fixed.
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