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Home › Hyundai › 2013 › Elantra GT Automatic Trans › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (2 Of 2) › DTC P0620: Alternator Control Circuit › Scantool Diagnostics › Monitor GDS Data

Monitor GDS Data

  1. Connect GDS to Data Link Connector (DLC).
  2. Engine start.
  3. Monitor "Alternator duty cycle, PWM signal" parameter on GDS.
    Fig 1: Display - Alternator Duty Cycle And PWM Signal Screen
    G09907731Courtesy of HYUNDAI MOTOR AMERICA
  4. Are the parameters displayed correctly?

    YES 

    • Fault is intermittent caused by poor contact in the sensor's and/or PCM/ECM's connector or was repaired and PCM/ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

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