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Thread: E-crafter: switch on/off high-voltage system

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    Question E-crafter: switch on/off high-voltage system

    Does anyone know if you can switch off the high voltage system with VCDS in the new e-Crafter?

    Thanks in advance.
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    Benevolent Dictator Uwe's Avatar
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    Please post an Auto-Scan.

    From poking around on Andy's A3 e-tron, what actually disables the high voltage system is pulling a plug that completes a low-voltage circuit that energizes the coil of the high-voltage contactor. Everything done with a scan-tool is just "CYA" verification.

    I cannot say for sure whether this is also true of the e-Crafter.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    Verified VCDS User PetrolDave's Avatar
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    Quote Originally Posted by Uwe View Post
    From poking around on Andy's A3 e-tron, what actually disables the high voltage system is pulling a plug that completes a low-voltage circuit that energizes the coil of the high-voltage contactor. Everything done with a scan-tool is just "CYA" verification.
    I always remember the acronym I was taught for safe working on HV systems:
    S - Switch off
    I - isolate (i.e. open a physical switch/connector)
    D - dump (i.e. discharge any capacitors)
    E - earth (so if anyone does manage to override the Switch off andIsolate you won't suddenly be touching HV)

    It would appear that the scan-tool may do the "Switch off" part, the connector Uwe mentions does the "Isolate" part and it's down to good training to follow the "Dump" and "Earth" parts.

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    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by PetrolDave View Post
    I always remember the acronym I was taught for safe working on HV systems:
    Bah. 400V is hardly "High Voltage".



    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    Verified VCDS User PetrolDave's Avatar
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    Quote Originally Posted by Uwe View Post
    Bah. 400V is hardly "High Voltage".
    True, 500kV is much scarier but 400V DC can still be fatal if not treated with respect.

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