The issue of car alarms not sounding when locked has led to an increase in car thefts, including theft of items inside cars, in recent years. Therefore, having a car alarm has become an essential accessory.

Car alarms have proven effective in reducing the percentage of thefts occurring in society. Usually, when you lock the car, the alarm will sound if the car has been locked properly.

However, what if the car alarm does not sound when locked? What are the causes, and what are the solutions? To answer all your questions, please pay attention to the following review.

Causes of Car Alarm Not Sounding When Locked 

What causes the car alarm not to sound when locked? Here are some of the causes:

1. Central Lock Battery Power is Running Low

When the car alarm is not sounding, do not panic immediately. You can first check the battery of the central lock.

Decreased battery power or a dead battery occurs due to frequent use of the alarm remote. A dead battery is the most likely cause of the car alarm not sounding when locked.

2. Car is in Valet Mode

Did you know that car alarms also have silent and unsilent modes? This mode is often used when the car wants to utilize valet parking services. This service is usually used by parking services in malls, restaurants, hotels, or other public places. 

If you are using valet parking services, you inevitably have to loosen your car's security system. Valet parking requires your car to be driven by the parking attendant for a while until the car is parked. Your car alarm not sounding when locked could be because you forgot to change the valet mode back to normal mode.

3. Damage to the Car Alarm System

Is the car remote not functioning after changing the battery? This can usually happen due to damage to the car alarm system. Typically, the damage that causes the car alarm not to sound occurs in the siren or alarm module. 

Read Also: 3 Ways to Turn Off a Car Alarm That Keeps Sounding

Solutions for Facing the Condition of Car Alarm Not Sounding When Locked

Here are some smart solutions you can try when facing the condition of the car alarm not sounding when locked.

1. Replace the central lock battery with a new one

The first way to make the car alarm sound is to replace the dead central lock battery with a new one. 

2. Change the car alarm valet mode to normal mode

As humans, forgetting is a natural thing. The many activities and mental burdens sometimes make someone forget, including forgetting to change the valet mode of the alarm to normal mode.

The method is quite easy; you just need to turn off the car alarm system first. This must be done to see if the alarm indicator light also goes out or remains on.

If the car alarm system is off, but the alarm indicator remains on, then your car is confirmed to be in valet mode. 

After you confirm that the car is in valet mode, you can open the steering wheel area. Then look for the lock alarm button with a locked padlock icon, press that button.

Then press the unlock alarm button with a locked padlock icon until the alarm sounds. After that, you may press the alarm button (door lock) again to turn off the alarm. 

Read Also: Several Ways to Reset a Car Alarm That Can Be Done

3. Replace the siren or alarm module components

If the cause of the car alarm not sounding when locked comes from the siren and alarm module, you can immediately replace those components with new ones. You can ask for help from a Daihatsu dealer or the nearest authorized workshop to address this condition so that the alarm can be used as intended.