and disable Bluetooth/Cellular. If using a Wi-Fi adapter, only keep Wi-Fi active to prevent incoming calls from interrupting the data stream. Permissions:
Connect a high-quality battery charger or power supply (minimum 20A-50A recommended). A drop in voltage during the initial 10-40 minute flash can permanently damage the TCU. Transmission Health:
A failed flash due to unstable software can "brick" your TCU, rendering your car undriveable and potentially requiring an expensive replacement.
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