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Home >> VinFast >> 2023 >> VF9 Plus >> Repair and Diagnosis (Single Page) >> Steering >> Electronic Steering >> Power Steering System Diagnosis (1 Of 2) >> DTC U1821-83: Lateral Control Steering Request - Value Of Signal Protection Calculation Incorrect >> VinFast DTC Guided Repair Instruction >> Operating Conditions

Operating Conditions

Enable Criteria
  1. 3000 ms Later After IGN ON
  2. do not enter over range () Battery voltage is between 10V to 16V)
  3. after over range, go in to normal range () Battery voltage is between 10.5V to 15.5V) at least Restart (=500 ms) time
  4. Communication Control Diag.Service = enable Rx and Tx or enable Rx and Disable Tx
  5. Control DTC Disable Diag.Service = On
  6. Vehicle CAN bus is normal (not Bus Off)
Failure Criteria Detection of CRC Error in Message ADAS_EPS_LATE_CON (0x37A)
Failure/Mature Time 400 ms
Pass Criteria CRC is normal in Message ADAS_EPS_LATE_CON (0x37A)
Pass/De-mature Time Immediately
Failure Aging 40 Ignition Cycles
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