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Home >> VinFast >> 2023 >> VF9 Eco >> Repair and Diagnosis >> Body & Frame >> Towing Systems >> Trailer Module Diagnosis >> DTC U0422-83: Invalid Data Received From Body Control Module (BCM) - Value of Signal Protection Calculation Incorrect >> 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 U014087 (BCM Missing Message) is not set.
Failure Criteria Checksum calculation is not correct for BCM message:
  1. BCM_LIGHT (0x106) or
  2. BCM_SwitchSts (0x109 or
  3. BCM_VOLTAGE (0x10A) or
  4. BCM_CLAMP_STAT (0x112)
Failure/Mature Time Immediate
Pass Criteria Checksum calculation is correct for BCM message
  1. BCM_LIGHT (0x106) and
  2. BCM_SwitchSts (0x109 and
  3. BCM_VOLTAGE (0x10A) and
  4. BCM_CLAMP_STAT (0x112)
Pass/De-mature Time 1000 ms
Failure Aging 40 Ignition Cycles
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