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Home >> Hyundai >> 2016 >> Sonata Plug-In Hybrid >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System Diagnosis (PHEV) >> DTC U1004: Lost Communication with Hybrid Powertrain Control Module (H-CAN) >> DTC Inspection >> Monitor GDS Data

Monitor GDS Data

  1. Connect GDS to Data Link Connector (DLC).
  2. Ignition "ON" & engine "OFF".
  3. Select "Current Data" mode and monitor "Inhibitor switch" parameter.
  4. Monitor the "CAN COMMUNICATION SERVICE DATA (ENGINE RPM, VEHICLE SPEED SENSOR, THROTTLE P. SENSOR)" parameters on the GDS.
    Fig 1: Screen Display - Low- RPM
    G11646573Courtesy of HYUNDAI MOTOR AMERICA
    Fig 2: Screen Display - High- RPM
    G11646574Courtesy of HYUNDAI MOTOR AMERICA
  5. Is measured current datas within specification?

    YES 

    • Fault is intermittent caused by poor contact between PCM/TCM and Sensor, and DTC was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair as necessary and go to "Verification Vehicle Repair " procedure.

    NO 

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