Using ODIS on an Audi A3 e-tron, we found that the system’s test plan prioritizes safety and adherence to procedures. However, it doesn’t directly de-energize the high voltage system. De-energization is achieved by manually disconnecting the high voltage system Maintenance Connector TW.
Following this disconnection, the ODIS test plan verifies the system’s de-energized state, likely as a safeguard against contactor malfunctions. This verification requires specialized measuring equipment compatible with ODIS, which we lacked. However, we confirmed de-energization through other indicators.
It’s crucial to note that only certified High Voltage Technicians, who have undergone extensive training, are authorized to perform these procedures at dealerships.
Maintaining the 12V electrical system with a high-amperage charger during high voltage system de-energization is essential. We adhered to this precaution, but the consequences of not doing so are unknown.
While ODIS provides a comprehensive step-by-step guide for this process, we haven’t documented it in detail here.
