Information - Central locking system

Central locking is a system of central locking. It is required for the simultaneous opening or locking of all car doors and fuel cap. This clever spare part relates to the comfort systems of the vehicle. Door locking can be implemented using a centralized or decentralized control. Centralized control is possible only if there is one electronic control unit that controls all the doors. Increased number of functions that are under the control of the comfort system became a prerequisite to the decentralized management appearance.

When you apply a decentralized control, except of the central control unit in each door there is installed a separate electronic control unit. In modern cars the most common is decentralized system of the comfort control. Construction of the central locking is quite simple. It consists of the input sensors, control unit and actuators. The input sensors in the system are the doors limit switches and micro switches. Central locking system operates both when the ignition is on or off. If the car doors are locked with key, when you turn the key in the lock a micro switch responsible for the lock is activated. After that the signal is transmitted from the switch to the control box and then to the central control unit.

Central unit is responsible for the formation of control signals for all control units, rear door electric actuators and fuel tank cap. All the mechanisms involved in the system lock all vehicles doors. The signal in the central locking system helps to prevent re-actuating of the electrical drive. Similarly the unlocking is done. Failure of the central locking system is fraught with at least the fact that your car will be permanently either open or locked. If you want to save, do not buy spare parts (fan, turbocharger or flywheel) in the car workshop.

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What you need to know about central door lock replacement: lifetime limits, common defects and their signs, tips and recommendations

Manufacturers do not specify operational lifetime of the automotive central door lock. Replacement of the component is performed after short circuit on the actuators, severe damages of operating mechanisms. In some cases, installation of a new central lock may become necessary after short circuit in the control module.

A first sign of part defect is absence of door locks reaction to pressing of the key fob button, which transmits signals to the central lock control module. Also failures in component operation indicate its breakage. For example, the doors may unpromptedly close, open or lock, not receiving signals, coming from the central lock remote control.

Diagnostics of the component is performed at a service station, as it presupposes removal of a door cover, which is a quite laborious work. The procedure starts, as a rule, with inspection of central door lock fuses. Specialists will also check condition of contact connections with the control module, integrity of unit wiring, operability of doors actuators and their drive mechanisms. Moreover, performance of unit computer diagnostics may become necessary.

As replacement of the component includes complicated work with car electrics, such as security system, installation of the central door lock should be performed at a service station. Besides, the procedure presupposes removal of a door trim cover, and commonly, disassembling of a door.

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