From the new 2025 Venue's owner's manual:
"Rear passenger's seat belt warning
For rear seat
• As a reminder to the rear passenger, the rear passenger's seat belt warning lights will illuminate for about 6 seconds each time you turn the Engine Start/Stop button is in the ON position regardless of belt fastening.
• If the seat belt is not fastened when the Engine Start/Stop button is in the ON position, the seat belt warning light will illuminate for about 70 seconds.
• After wearing the seat belt, if you unfasten it when you drive under 20 km/h (12 mph), the corresponding warning light will continue to illuminate for about 70 seconds.
• After wearing the seat belt, if you unfasten it when you drive over 20 km/h (12 mph), the seat belt warning chime will sound for about 35 seconds and the corresponding warning light will blink.
• If the rear door is opened or closed under 10km/h (6 mph), warning light and warning sound do not work even if driving over 20 km/h (12 mph)."