Why doesn't the 2019 Lavida make a sound when locking?

[SanJulia]

19th Lavida does not make a sound when locking because the locking sound is turned off, but the specific situation needs to be inquired at a professional repair shop. The working principle of the locking sound is that when the horn button on the steering wheel or other positions is pressed, the current from the battery flows through the circuit to the electromagnetic coil of the horn relay. The electromagnetic coil attracts the moving contact switch of the relay to close, and the current flows to the horn. The current causes the electromagnet inside the horn to work, thereby vibrating the diaphragm to produce sound. Method to set the locking sound: Step on the brake pedal of the Lavida, put the gear lever in P position, release the brake pedal, press the one-button start key of the SAIC Lavida twice in a row, close all four doors, and hold the lock button on the driver's door for more than 10 seconds to complete the setting of the locking horn sound. The Lavida locking horn sound is a reminder method to inform the driver that the vehicle has been locked. Otherwise, the driver can only determine whether the vehicle is locked by checking the double flash of the vehicle. The horn is the audio signal device of the car: During the driving process of the car, the driver issues certain audio signals as needed and required to warn pedestrians and other vehicles to pay attention, ensuring traffic safety. At the same time, it is also used to urge movement and transmit signals.

[Erin]

The Lavida's default setting is to not beep when locking the car, which differs from the Japanese car alarm's 'beep beep' design philosophy, reflecting Volkswagen's original factory design style. The manufacturer mainly considered the issue of nighttime parking noise disturbing residents in residential areas. However, its hazard lights will flash twice, and the locking sound is quite clear, so it doesn't affect daily confirmation. My neighbor also drives a 2019 model and specifically checked the manual. If you want to change the alert sound, you can use a 5053 diagnostic cable to unlock hidden features, or buy an OBD plug-in from Taobao—it takes just 30 seconds to modify it to beep once when locked. Personally, I think the factory's quiet design is more elegant.

[SanLydia]

My Lavida doesn't beep when locking, and I initially thought it was broken. Later, I discovered that German cars generally adopt a silent locking logic—they use flashing lights instead of sound alerts. However, pay attention to the central control settings: after pressing the lock button on the key twice consecutively, immediately hold down the 'lock' button for 5 seconds, and you can activate the sound feedback upon hearing a 'beep' (supported by some model years). Additionally, check if all four doors are completely closed. If the trunk isn't shut properly or the hood switch has poor contact, the anti-theft system enters alert mode and won't make a sound. Previously, when my door wasn't fully closed, not only did locking not produce a sound, but the hazard lights also flashed wildly as an alarm.

[DelCameron]

The 2019 Lavida's factory anti-theft system operates silently by default. If you want the horn to sound, there are two scenarios: either a third-party alarm system was installed afterward (these often come with a lock beep feature), or the hidden settings were reprogrammed. A word of caution on modifications: Last year, the technician who modified my car's computer mentioned that incorrectly wiring an aftermarket horn module could trigger fault codes in the BCM (Body Control Module), and in severe cases, the power windows might stop functioning. Actually, paying attention to the red lock indicator on the dashboard is more reliable than relying on sound. Here's a lesser-known tip: Holding down the unlock button on the key fob can lower the windows, while holding the lock button not only activates the sound function but can also automatically raise the windows.