What is the reason for the 21st generation Corolla not making a sound when locking the car?
3 Answers
Carola locking the door without sound may be due to a loose wire or a malfunction. The sound when locking the car is produced by the relay in the anti-theft controller connecting to the horn. Below is a brief introduction about the Corolla: Safety: Equipped with GOA body structure, VSC (Vehicle Stability Control), curtain airbags, and side airbags, it thoroughly considers both active and passive safety, achieving world-class safety performance in its class. Interior: The overall style is simple, the dashboard design is conventional, the seats are spacious and comfortable, the air conditioning is effective, and the craftsmanship is good.
My 2021 Corolla also experienced the issue of no sound when locking the car. After some exploration, I found it might be a setting problem. After starting the car, press the menu button to find the vehicle settings, where there is a security option. Turning on the lock confirmation sound function solved the issue. If there’s still no sound after this operation, check if the horn wiring is loose or if there’s poor contact at the security horn connector on the left side of the engine compartment. Additionally, occasional crashes of the onboard computer can temporarily disable the function. Disconnecting the negative terminal of the battery for one minute and reconnecting it can reset the system. If all else fails, visit the 4S店 (dealership) to use a specialized computer to diagnose the security module. Although the probability of hardware failure is small, it’s not impossible.
As a seasoned Corolla driver with three years of experience, I've dealt with the issue of no audible lock confirmation several times. The most common cause is accidentally disabling the sound via the car key fob. Try holding down both the lock and unlock buttons for five seconds to see if you can reactivate it. If that doesn't work, open the door and check if the red security indicator light on the driver's side door frame is flashing. If it's not, it means the anti-theft system isn't activated, and you'll need to inspect whether the anti-theft fuse in the fuse box has blown. Another often overlooked reason: when installing aftermarket GPS or anti-theft devices, wire cutting may interfere with the original horn control circuit. It's best to have the installation shop recheck the wiring.
