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Home >> Hyundai >> 2018 >> Tucson Value, 4WD >> Repair and Diagnosis >> Transmission >> Transfer Case >> 4WD Control System Diagnosis >> DTC U1121: Lost Communication With Electric Stability Program Module >> Wiring Inspection >> CAN Communication Line Check >> Check Short To Ground In CAN Communication Line
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Check Short To Ground In CAN Communication Line

  1. IG key "OFF".
  2. Measure resistance between CAN high terminal (#3) of diagnostic connector and chassis ground.
  3. Measure resistance between CAN low terminal (#11) of diagnostic connector and chassis ground.

    Specification:  ∞ Ω

  4. Is the measured value within specification?

    YES 

    • Check PCM, 4WD ECU, TCM and ESC ECM connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair " procedure.

    NO