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Home >> VinFast >> 2023 >> VF8 Plus >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Intelligent Distribution Brake Diagnosis (2 Of 2) >> DTC U0457-81: Data from Media Head Unit (MHU) Control Module - Invalid Serial Data Received >> VinFast DTC Guided Repair Instruction >> Operating Conditions

Operating Conditions

Enable Criteria ECU On
IGN On
The battery voltage is between 9V to 16V.
Failure Criteria Sensor fault information is received continuously.
  1. DISP_HR = 0xFF: Invalid (fault detection time: 5000 ms)
  2. DISP_MN = 0xFF: Failure (fault detection time: 5000 ms)
  3. DISP_SEC = 0xFF: Invalid (fault detection time: 5000 ms)
  4. DISP_DATE_DAY = 0xFF: Failure (fault detection time: 5000 ms)
  5. DISP_DATE_MON = 0xF: Invalid (fault detection time: 5000 ms)
  6. DISP_DATE_YR = 0xFFFF: Failure (fault detection time: 5000 ms)
  7. MHU_ESC_Mode_Select_Signal = 0x3: Invalid (fault detection time: 500 ms)
Failure/Mature Time 1 to 6) 5000 ms.
2) 500 ms
Pass Criteria Signal is received normally over the specified period
Pass/De-mature Time 1 to 6) 5000 ms.
2) 500 ms
Failure Aging 40 Ignition cycles.
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