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Home >> VinFast >> 2023 >> VF8 Eco >> Repair and Diagnosis (Single Page) >> Steering >> Electronic Steering >> Power Steering System Diagnosis (2 Of 2) >> DTC U0447-81: Invalid Data Received from Serial Data Gateway Module (XGW) - Invalid Serial Data Received >> VinFast DTC Guided Repair Instruction >> Operating Conditions
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Operating Conditions

Enable Criteria
  1. 3000 ms after IGN ON
  2. do not enter over range (Battery voltage is between 9V to 16V)
  3. after over range, go in to normal range (Battery voltage is between 9V to 16V) at least Restart (=500 ms) time
  4. Communication Control Diag.Service = enableRxAndTx or enableRxAndDisableTx
  5. ControlDTC Disable Diag.Service = On
  6. Vehicle CAN bus is normal (not Bus Off)
Failure Criteria
  1. CCU_TEMP_PRESURE:CCU_InteriorTemp == 0xFF or CCU_TEMP_PRESURE:CCU_TempEx_AC == 0xFF
  2. BCM_VOLTAGE:UBatt == 0x3FFF
  3. IC_MILEAGE:MILE_KM == 0xFFFFFF
Failure/Mature Time
  1. 5000 ms (+-10%)
  2. 2500 ms (+-10%)
  3. 500 ms (+-10%)
Pass Criteria
  1. CCU_TEMP_ PRESURE: CCU_InteriorTemp!= 0xFF And CCU_TEMP_ PRESURE: CCU_TempEx_AC!= 0xFF
  2. BCM_VOLTAGE: UBatt!= 0x3FFF
  3. IC_MILEAGE:MILE_KM! = 0xFFFFFF
Pass/De-mature Time Immediately
Failure Aging 40 Ignition cycles