Car Central Locking System, Components and Their Functions

Understanding the car central lock circuit is something that all car owners need to comprehend. This is because the central lock is a sophisticated system that can automatically lock all car doors, thus preventing the risk of theft when the car is left unattended. Understanding the central lock circuit can help you when you want to replace a damaged central lock. Instead of being curious, let’s take a look at the following review.

Car Central Lock Circuit along with Its Components and Functions

In the car central lock circuit, there are usually several components that help the performance of the central lock. The components within it are as follows.

1. Door lock control unit

This component functions as a controller for the current supply that will be used to drive the door lock actuator. Within the door lock control unit, there are several important components as follows:

Relay door lock control unit: this component functions to open and close the electric current supplied to the door lock actuator. In terms of its function, this relay component can be referred to as an electronic switch.

Transistor: this component serves as a modulation signal for the door lock control unit. Additionally, this component functions to stabilize voltage and act as a switch.

2. Door locking mechanism

This component acts as the operator of the door locking system manually. In its working mechanism, this component is directly connected to the door lock actuator. For the door locking mechanism to function properly, assistance from other components within it is required as follows.

• Locking link: this component functions as the operator of the door lock according to the locking knob and door lock actuator.
• Locking knob: this component provides pressure to the locking link. Thus, the locking link will connect with the actuator. Additionally, the locking knob also functions as a lock for all car doors or is similar to a switch.
• Door lock: this component serves to connect and lock the striker and the door.
• Striker: this component ensures that the car door can be locked.
• Opening control lock: this component functions to release the connection between the door lock and the striker. 
• Locking cylinder: this component acts as the operator of the door lock on the outside.
• Inside handle: this component serves to release the connection between the door lock and the striker so that the car door can be opened from the inside. 
• Outside handle: this component serves to release the connection between the door lock and the striker so that the car door can be opened from the outside. 

Read Also : Know 3 Easy Ways to Install a Car Alarm Circuit

3. Door lock actuator

This component functions to move the locking link that is connected to the door lock. Inside the door lock actuator, there are several important components as follows.

• Motor: this component functions to move the locking link.
• Amature rod: this component serves as the driver of the locking link.
• Motor cable: this component functions to channel electricity from the battery to the electric motor.
• Switch cable: this component functions to channel electric current from the battery to the door lock unit. 
• Gear: this component serves to transmit rotation from the electric motor to the gear pinion.
• Gear pinion meshes: this component functions to move the amature rod through rack meshes.

Thus, some reviews regarding the central lock circuit along with its components. After reading the above review, do you have problems with the central lock door and plan to replace the central lock yourself? If you are unsure, you can take your car to a Daihatsu authorized workshop for proper service.