AW: Zenec units include a low-voltage protection to avoid low voltage operation for ICs on the main board, which could malfunction without steady 12V supply voltage. Please consult your car service point to review your car´s battery and wiring.
The cause of device reboots is therefore to be found in the on-board power supply network, which falls briefly below about 10.5V during engine start-up.
Please consult your car dealer and let check the battery and the cable connections.