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Home >> VinFast >> 2023 >> VF8 Eco >> Repair and Diagnosis >> Body & Frame >> Towing Systems >> Trailer Module Diagnosis >> DTC U0447-81: Invalid Data Received From Serial Data Gateway (XGW) - Invalid Serial Data Received >> VinFast DTC Guided Repair Instruction >> Operating Conditions
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Operating Conditions

Enable Criteria Ignition ON
Battery Voltage is between 9V and 16V.
DTC U300004 (Trailer Module System Failure) is not set.
DTC U117488 (Body CAN - Bus Off) is not set. DTC U014687 (XGW Missing Message) is not set.
DTC U044783 (XGW Invalid Signal Protection) is not set.
DTC U044782 (XGW Incorrect Alive/Sequence Failure) is not set.
Failure Criteria
  1. EDS_OutPut_FR (0x1F8) is received with signal EDS_SpdValid_FR = $0 (Invalid) or EDS_output_trqValid_FR = $0 (Invalid) or
  2. EDS_OutPut_RR (0x1F8) is received with signal EDS_SpdValid_RR = $0 (Invalid) or EDS_output_trqValid_RR = $0 (Invalid) or
  3. IDB_STATUS (0x20D) received with signal VehicleSpdSts = $0 (Invalid) or MCPressureSts = $0 (Invalid)
Failure/Mature Time Immediate
Pass Criteria
  1. EDS_OutPut_FR (0x1F8) is received with signal EDS_SpdValid_FR = $1 (Valid) and EDS_output_trqValid_FR = $1 (Valid) and
  2. EDS_OutPut_RR (0x1F8) is received with signal EDS_SpdValid_RR = $1 (Valid) and EDS_output_trqValid_RR = $1 (Valid) and
  3. IDB_STATUS (0x20D) received with signal VehicleSpdSts = $1 (Valid) and MCPressureSts = $1 (Valid)
Pass/De-mature Time 1000 ms
Failure Aging 40 Ignition Cycles