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Home >> VinFast >> 2023 >> VF9 Plus >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control Diagnosis (2 Of 3) >> DTC U0422-83: Invalid Data Received From Body Control Module - Value Of Signal Protection Calculation Incorrect >> VinFast DTC Guided Repair Instruction >> Repair Instruction

Repair Instruction

Repair Actions

  1. Check for communication faults with BCM from other ECU's and investigate faults with BCM.
  2. If fault returns, check for communication faults from the Body CAN communication BUS linking CCU-F/R and BCM and investigate faults with Body CAN communication BUS.
  3. If fault returns, check electrical circuits between CCU-F/R and BCM, repair if faulty and clear DTC.
  4. Check sender ECU software status.
  5. If fault returns, replace BCM and clear DTC.
  6. If fault returns, replace CCU-F/R and clear DTC.
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