Theft deterrent system. Immobilizer. Double locking system

The theft deterrent system of the Lexus GS (2016–2020) combines an immobilizer and double locking for optimum protection. Transponder keys prevent unauthorized starting, while double locking blocks opening of the doors from both inside and outside, which is ideal against break-in attempts. This chapter provides useful tips on activating and deactivating the system and emphasizes that no one may remain in the vehicle when double locking is activated. This keeps the Lexus GS secure and protected, even in urban environments.

Immobilizer

The vehicle keys have built-in transponder chips that prevent the engine from starting if the keys have not been registered in advance in the vehicle's computer.

Never leave the keys in the vehicle when you leave it.

This system is designed to protect the vehicle against theft, but it does not provide absolute theft protection.

The indicator light flashes after the engine switch is turned off to show that the system is operating.

The indicator light stops flashing after the engine switch is set to ACCESSORY or IGNITION ON to show that the system has been deactivated.

System maintenance

The vehicle has a maintenance-free immobilizer.

Conditions that may cause a system malfunction

• When the key fob comes into contact with a metallic object
• When the key is located very close to, or touching, the security system key (key with built-in transponder chip) of another vehicle

Double locking system

Unauthorized access to the vehicle is prevented by disabling the door unlock function from both outside and inside the vehicle.

Vehicles with this system have stickers on the window glass of both front doors.

Activating the double locking system

Turn off the engine switch, have all passengers exit the vehicle, and make sure all doors are closed.

Using the smart entry function: Touch the sensor area on the outside door handle twice within 5 seconds.

Using the remote: Presstwice within 5 seconds.

Deactivating the Double Locking System

With the smart access function: Touch the outside door handle.

Using the remote: Press.

WARNING

Precautions for the Double Locking System

Never activate the double locking system when people are inside the vehicle, as the doors can then no longer be opened from the inside.

The theft deterrent system of the Lexus GS (4th generation) combines modern technologies such as the engine immobilizer and the double locking system to provide a high level of security. The transponder chips in the keys prevent unauthorized starting, while the double locking system protects the vehicle from unauthorized access. These systems operate unobtrusively in the background and give the driver a reassuring sense of protection.

By integrating these security features, Lexus takes a strong stand against vehicle theft. At the same time, ease of use is maintained, so the systems are easy to operate in everyday driving.

How does the engine immobilizer work in the Lexus GS?

The engine immobilizer prevents the engine from starting if the key is not correctly registered by electronically blocking engine start.

Why is the double locking system important?

It ensures that the doors can be opened neither from the outside nor from the inside, effectively preventing unauthorized entry.