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Home >> Hyundai >> 2021 >> Tucson Value, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (4WD Control Diagnosis) >> DTC U1121: Lost Communication With Electric Stability Program Module >> DTC Information And Inspection >> DTC Setting Condition

DTC Setting Condition

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Trouble shooting Condition Possible Cause
Main action
  • Receive SAS CAN signals
  1. Poor contact of connectors of each communication module
  2. Open/short in the CAN communication circuit
  3. ESC/ESP ECU
Prerequisite condition
  • Turn the ignition switch on or start the engine.
Threshold value
  • An ESC/ESP 2 signal is not received
Diagnosis time
  • 2 sec