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Home >> VinFast >> 2023 >> VF8 Plus >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Front/Rear Drive Motor Control Diagnosis (2 Of 2) >> DTC U3000-04: Control Module - System Internal Failure >> VinFast DTC Guided Repair Instruction >> Operating Conditions

Operating Conditions

Enable Criteria Ignition ON
Failure Criteria
    1. HvMcu_SevFault is considered to happen when Hvmcu active discharge failure, 2 ms Cycle test.
    2. Hvmcu bus voltage check error, 2 ms Cycle test.
    3. Hvmcu voltage hardware failure, 2 ms Cycle test.
    4. Hvmcu active discharge duty cycle failure.
    5. Hvmcu active discharge frequency fault.
    6. HvMcu emergency power supply voltage fault.
    7. Hvmcu check failure.
    8. Hvmcu frame loss fault occur
    9. HvMcu communication disconnection failure happen.
    10. When the sampling value of the power supply voltage (1.8V, 3.3V, 5V, 18V, etc.) of the chip controller exceeds the threshold value, a fault will be reported. Any one of these things, test failed.
    1. Starting from the active discharge, if the bus voltage is still greater than 60V after more than 200 operation cycles (10 ms), the active discharge time-out is determined.
    2. MCU determines to enter the active discharge state and discharge flag enable, over 20 cycle time (10 ms), the decrease of high voltage is smaller than 100V (CAL_Scf_UdcLnkAbsDiffLim_f32), the fault will report.
Failure/Mature Time 200 ms
Pass Criteria
    1. When Hvmcu active discharge succeed, 2 ms Cycle test.
    2. Hvmcu bus voltage check no error, 2 ms Cycle test.
    3. Hvmcu voltage hardware not failure, 2 ms Cycle test.
    4. Hvmcu active discharge duty cycle not failure.
    5. Hvmcu active discharge frequency not fault.
    6. HvMcu emergency power supply voltage not fault.
    7. Hvmcu check not failure.
    8. Hvmcu frame loss fault not occur
    9. HvMcu communication disconnection failure is not happen.
    10. When the sampling value of the power supply voltage (1.8V, 3.3V, 5V, 18V, etc.) of The chip controller less than the threshold value
    1. Starting from the active discharge, if the bus voltage is less than 60V after less than 200 operation cycles (10 ms).
    2. MCU determines to enter the active discharge state and discharge flag enable, over 20 cycle time (10 ms), the decrease of high voltage is bigger than 100V (CAL_Scf_UdcLnkAbsDiffLim_f32).
Pass/De-mature Time 30 ms
Failure Aging 40 Ignition cycles.