Why is the reversing radar of the Tiida not making any sound?

[CassandraDella]

Inappropriate or damaged wiring connection; low sensitivity and slow response; there is a blind spot on the far left and far right sides of the reversing radar, which cannot detect obstacles when they are about to come into contact. Below is an introduction to the Tiida: 1. Exterior: From the side view, the Tiida features soft lines. The hatchback design without a tail appears refined, with smooth lines at the rear. The triangular window next to the C-pillar is trapezoidal in shape, creating a downward tapering effect that gives the rear a visually lowered appearance, making the car body look more stable. 2. Body dimensions: The Tiida has a wheelbase of 2700mm, with a length/width/height of 4205mm/1695mm/1540mm. While not particularly large among its peers, the front seat headroom reaches 960mm, and the rear space, though slightly smaller, still reaches 940mm. 3. Powertrain: The Tiida is equipped with an inline 4-cylinder engine featuring a DOHC double overhead camshaft structure combined with CVTC (Continuous Variable Valve Timing Control) technology. It can control the camshaft phase of intake and exhaust based on the vehicle's driving state to ensure optimal ignition timing, thereby significantly improving output torque and fuel economy.