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Home >> VinFast >> 2023 >> VF8 Plus >> Repair and Diagnosis >> Body & Frame >> Seats >> Driver Power Seat Module Diagnosis >> DTC U1277-04: LSSM_D Failure - System Internal Failure >> VinFast DTC Guided Repair Instruction >> Operating Conditions

Operating Conditions

Enable Criteria Ignition ON
Failure Criteria
  1. LSSM_D_Resp (0x1D) message is missing
  2. LSSM_D_Resp (0x1D) message present with Invalid/Error
  • LSSM_DPumpFail is Invalid (0x1) or Error (0x2)
  • LSSM_DLINResErr is Error (0x1)

Satisfied one of above condition for Mature Time consecutively
Failure/Mature Time 10 ms
Pass Criteria
  1. Monitored message is received correctly.
  2. LSSM_D_Resp (0x1D) message don't present with Invalid/Error
  • LSSM_DPumpFail is Invalid (0x1) or Error (0x2)
  • LSSM_DLINResErr is Error (0x1)

Satisfied all of above condition for Mature Time consecutively
Pass/De-mature Time 10 ms
Failure Aging 30 Ignition cycles
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