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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 >> Component Inspection

Component Inspection

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  1. Ignition "ON" & Engine "OFF".
  2. Connect scantool and check DTC.
  3. Erase the DTC with scantool.
  4. After turning IG OFF to IG ON twice or three times, check DTC again.
  5. Does the scantool show same DTC again?

    YES 

    • Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Fault is intermittent caused by poor contact in the sensor's and/or PCM/TCM's connector or was repaired and PCM/TCM's memory was not cleared.

      Thoroughly check connectors for looseness, poor connection, ending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

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