Firmware updates sometimes reset the default Canbus settings. Go to Settings > Factory Settings (you may need a passcode such as 126 , 3368 , or 8888 ), look for "Canbus Type," and re-select your specific vehicle make and model from the dropdown menu to restore control functionality. Conclusion
Select the file from your USB drive and confirm. The unit will reboot quickly after flashing the MCU. Troubleshooting Common ZWNAV Firmware Issues 1. The Screen is Black but Buttons Light Up zwnav firmware
They may not be ideal for:
The unit will reboot several times. Do not turn off the car until the home screen reappears. Custom Firmware: Is it Worth It? Firmware updates sometimes reset the default Canbus settings