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Home >> Hyundai >> 2017 >> Azera Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System Diagnosis >> DTC U0001: High Speed CAN Communication Bus Off >> Scantool Diagnostics >> 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: Scantool Display - Current Data (Low-RPM)
    G12091104Courtesy of HYUNDAI MOTOR AMERICA
    Fig 2: Scantool Display - Current Data (High-RPM)
    G12091105Courtesy of HYUNDAI MOTOR AMERICA
  5. Is measured current data 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 of Vehicle Repair " procedure.

    NO 

    • Go to "Terminal and Connector Inspection" procedure.
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