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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 65 (Automatic Transaxle System Diagnosis (HEV)) >> DTC P1986: EOP Relay Error >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Monitoring voltage range (Circuit open/short check)
  1. Main relay fault
  2. Relay coil error
Enable Conditions
  • OPU Relay on
  • Relay coil drive voltage < 0.8V
  • After command of EOP operation>0.5sec.
Threshold Value
  • OPU internal Vm < 5.5 V
Diagnostic Time
  • Continue for over 3 sec.
Fail safe
  • Prohibit EOP control
  • UD, LR slip control
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