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DTC U0122 Lost Communication with Vehicle Dynamics Control Module; DTC U0129 Lost Communication with Brake System Control Module: Description

If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (One side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).

DTC DETECTION CONDITION CHART

DTC Code DTC Detection Condition Trouble Area
U0122 There is no communication from the master cylinder solenoid (skid control ECU).
  • Power source circuit of master cylinder solenoid (skid control ECU)
  • One side of CAN branch wire of other systems
  • Master cylinder solenoid (skid control ECU)
  • Master cylinder solenoid (skid control ECU) branch wire or connector
U0129 There is no communication from the master cylinder solenoid (skid control ECU).
  • Power source circuit of master cylinder solenoid (skid control ECU)
  • One side of CAN branch wire of other systems
  • Master cylinder solenoid (skid control ECU)
  • Master cylinder solenoid (skid control ECU) branch wire or connector