Central locking on Granta FL: complete installation instructions from A to Z

Installing central locking on Lada Granta FL (restyled version) is one of the most popular modifications among the owners of this car. The standard equipment, even in top versions, is often devoid of this option, which causes fair dissatisfaction: in 2026, the absence of a central lock looks like an anachronism. However, there is a solution - installing the system yourself or with the help of specialists. In this article we will look at all stages of installation: from choosing a kit to programming the key fob, taking into account the wiring features FL Grants.

The main advantage of self-installation is saving up to 10,000 rubles compared to dealer services. But there are also pitfalls here: an incorrect connection can damage the body control unit (BCM), cause a short circuit or lead to incorrect operation of the alarm system. We will analyze in detail three connection schemes (through the standard BCM, crawler and autonomous system), and we will also give recommendations on the selection of actuators and controller. We will pay special attention unique feature of Grants FL - changed pinout of the BCM connector compared to the pre-restyling version, which causes 70% of installation errors.

1. Choosing a central locking kit: what to buy for Granta FL

The first step is to decide on the type of system. For Lada Granta FL (2018–2026) three options are suitable:

• 🔧 Standard kit (article 21900-3763010-00): includes actuators, wires and door lock button. Suitable for integration with the native BCM, but requires flashing the unit (the service costs ~3,500 rubles).
• 🔌 Universal set (for example, StarLine M20 or Pandora DXL 3500): works autonomously, does not affect standard electrics. Plus - compatible with alarm systems, minus - high price (from 8,000 rubles).
• 🔄 Hybrid scheme: standard actuators + universal controller (for example, Alligator C-400). Optimal balance of price (4,000–5,000 rubles) and functionality.

For most owners FL Grants the third option is optimal. It allows you to keep the standard lock button on the driver's door and avoid problems with the warranty (if it is still valid). When choosing actuators, pay attention to their standard size:

Actuator model	Compatibility	Price, rub.	Notes
VALEO 475006	All doors	1 200	Original, resource 100,000 cycles
BERGA 573101	Front doors	800	Analogue, possible play after 50,000 cycles
METZGER 903004	Rear doors	950	Reinforced design for frosts down to -40°C
Regular (21900-3708010)	Any door	1 500	The fasteners on the rear doors need to be improved

⚠️ Attention: Actuators from pre-restyling Grants (until 2018) not suitable for FL due to the changed geometry of the door cards. Also avoid cheap Chinese analogues without spring return - they often jam at sub-zero temperatures.

2. Tools and preparation: what you will need for the job

Before starting installation, prepare:

• 🔨 Tools: screwdrivers TORX T20 and PH2, pliers, wire stripper, multimeter, soldering iron (power 40–60 W).
• 📦 Consumables: electrical tape 3M Scotch 33+, heat shrink tubes (diameter 3–5 mm), terminals "mom-dad" (pitch 2.5 mm), silicone sealant for processing connectors.
• 📄 Documentation: wiring diagram FL Grants (you can download it at official website of LADA), instructions for the central locking controller.

Be sure to turn off negative battery terminal before starting work! On Grante FL body control unit (BCM) remains energized for another 5–7 minutes after turning off the ignition, so wait until the power is completely off (check the voltage at the connector with a multimeter X1 BCM - should be 0 V).

Take a photo of the standard door wiring|Disconnect the battery and wait for the BCM to discharge|Check the completeness of the central locking kit|Prepare the workplace (lighting, table for disassembling door cards)|Download the wiring diagram for Granta FL-->

⚠️ Attention: If your Granta FL equipped with a system ERA-GLONASS, before disconnecting the battery, be sure to deactivate it through the on-board computer menu (Settings → Security → ERA-GLONASS → Off). Otherwise, the unit may block the engine from starting, mistaking the power outage as an emergency.

3. Connection diagrams: 3 options for Grants FL

The choice of scheme depends on the type of kit purchased. Let's consider all three options, taking into account the features FL Grants.

Scheme 1: Connection via standard BCM (for original kits)

This scheme is suitable if you bought a standard kit 21900-3763010-00. The main difficulty is connecting to the connector correctly X1 body control unit. On Grante FL The pinout has changed:

• 🔌 Contact X1/12 (blue-yellow wire) - blocking control.
• 🔌 Contact X1/11 (green-black) - unlock control.
• 🔌 Contact X1/24 (red) - +12V from the ignition switch.

To activate the central locking function in the BCM you will need reflash the block using a diagnostic scanner (for example, Launch X431). Without this, the BCM will not “see” new actuators. The cost of firmware in the service is from 2,500 to 4,000 rubles.

How to check the BCM firmware version?

1. Connect the diagnostic scanner to the OBD-II connector.

2. Select menu Lada → Granta FL → Body → BCM.

3. In the parameters, find the line Software Version.

4. If the version is lower 1.05.04, will require an update to support central locking.

Scheme 2: Autonomous system (universal controller)

If you have chosen a universal kit (for example, StarLine M20), the connection is made parallel to the standard wiring. The advantage is that there is no need to interfere with BCM. The downside is that you will have to hide an additional control unit (usually behind the dashboard).

Typical connection diagram:

1. Plus (+12V) - from the fuse F30 (10A) in the mounting block.
2. Minus (GND) - to the body with the BCM mounting bolt.
3. Control wires - to the actuators of each door (see color coding in the instructions for the controller).
4. Door opening sensor - connects to the driver's door limit switch (orange-black wire).

Scheme 3: Hybrid connection (standard actuators + universal controller)

The most popular option among owners FL Grants. Here standard actuators are connected to a universal controller (for example, Alligator C-400), and control is carried out through a button on the driver's door or a key fob.

Key points:

• 🔹 The controller connects to +12V from the ignition switch (wire red/yellow in the harness under the steering wheel).
• 🔹 Locking/unlocking signals are taken from the driver's door button (contacts 30 and 87a relay K1 in the fuse box).
• 🔹 For correct operation it is necessary disable the standard blocking relay (located in the fuse box under number K5).

4. Installation of actuators: step-by-step instructions

Let's start with the front doors - they are easier to install. The rear doors will require modifications to the fasteners.

Front doors

1. Remove the door card:
   • Unscrew two screws TORX T20 under the opening handle.
   • Remove the clips around the perimeter (use a plastic spatula).
   • Disconnect the wiring connectors (take a photo of their location!).

Install the actuator:

• Try the actuator on the standard lock mount. On Grante FL The holes may not match - you will need to drill them to a diameter of 8 mm.
• Secure the actuator with bolts M6×16 (included).
• Connect the rod to the lock - it should move freely, without jamming.
• Pass the actuator wires through the access hole in the door (use silicone grease to protect against moisture).

Rear doors

The main difficulty here is the lack of standard mounts for the actuator. Solutions:

• 🔧 Option 1: Use universal brackets (for example, Kraft KT-005).
• 🔧 Option 2: Make a mount from an aluminum plate 2 mm thick (drawings are on the forums Lada-Granta.ru).
• 🔧 Option 3: Install the actuator with double-sided tape 3M VHB (temporary solution, not recommended for permanent use).

⚠️ Attention: On the rear doors FL Grants Often there is no standard wiring for actuators. You will have to run new wires (cross section 0.75 mm²) from the front doors through the body pillar. Use corrugation to protect against chafing!

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Before assembling the door card, check the operation of the actuator manually: apply +12V to the appropriate contacts. The rod should move smoothly, without squeaks. If there are any jams, lubricate the lock mechanism with graphite lubricant.

5. Programming the key fob and setting up the system

After the mechanical installation, it is necessary to configure the electronic part. The process depends on the controller type:

For standard kit (with BCM flashing)

1. Connect the diagnostic scanner and select menu Lada → Granta FL → Body → BCM → Activation of central locking.
2. Enter your activation code (usually 1234 or 0000 — see the instructions for the scanner).
3. Reset the BCM (disconnect battery for 10 minutes).
4. Key fob programming:
   • Insert the key into the ignition, turn to position ACC.
   • Press the lock button on the driver's door 5 times in a row.
   • Within 10 seconds, press any button on the key fob and a confirmation tone should sound.

For universal controllers (StarLine, Pandora)

Instructions with example StarLine M20:

1. Turn on the ignition (position ON).
2. Press the service button Valet (hidden behind the dashboard) 7 times.
3. The LED indicator will start flashing - press the button 1 on the keychain.
4. Repeat step 3 for the remaining keychains (up to 4 pieces).
5. Turn off the ignition - the system will save the settings.

⚠️ Attention: If the key fob does not work after programming, check antenna connection polarity controller. On Grante FL There is often interference from the standard antenna ERA-GLONASS — in this case, the central locking antenna must be installed as far as possible (for example, under the roof trim).

6. Common mistakes and how to avoid them

Even experienced car enthusiasts make mistakes when installing a central locking system. Grant FL. Here are the most common:

Error	Reason	Solution
Actuators work inconsistently	Incorrect connection polarity	Swap places + and – on a problematic actuator
The central locking works spontaneously	Power supply interference or poor ground contact	Install a 1000 uF capacitor in parallel with the controller power supply
Locking from the key fob does not work, but it works from the button	The key fob is not programmed or the antenna signal is weak	Reprogram the key fob, check the antenna location
When locking, clicks are heard, but the doors do not close	Weak actuator traction or jamming of the lock mechanism	Adjust the length of the pull rod, lubricate the lock

Another common problem is conflict with alarm. If on your Grante FL an alarm system has been installed (for example, StarLine A91), the central locking may not work correctly. Solution:

• 🔧 Disable the alarm function "Door locking when arming".
• 🔧 Connect central locking in parallel signaling via diode isolation.
• 🔧 Update the alarm firmware (relevant for models older than 2020).
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If after installing the central locking the power windows stop working, check the fuse F20 (20A) in the mounting block. Often its burnout is associated with a short circuit in the door wiring.

7. Testing and final improvements

Before final assembly, perform a complete system test:

1. Mechanical check:
   • Close all the doors and try to open them from the inside - the locks should work synchronously.
   • Check the operation of the locks at temperatures below 0°C (you can use a can of coolant to simulate frost).
2. Electronics check:
   • Make sure that the central locking is activated by the key fob from a distance of at least 10 meters.
   • Check the automatic locking when driving (if the function is activated).
   • Make sure that the alarm (if any) communicates correctly with the central locking.
6. Security check:
   • Open the hood and check if the wires are frayed when closing/opening the doors.
   • Make sure that the fuses do not get hot after 10-15 minutes of system operation.

If all tests pass successfully, you can proceed with the final assembly. Don't forget:

• 🔹 Secure the wires with ties so that they do not dangle inside the door.
• 🔹 Treat connectors with silicone grease to protect against corrosion.
• 🔹 Check the tightness of the door cards (especially the rear ones) - if necessary, apply sealant around the perimeter.

8. Maintenance and care of the central locking

To ensure the system lasts a long time, follow simple rules:

• 🔧 Every 6 months: lubricate the locking mechanisms and actuator rods lithium grease (for example, LIQUI MOLY LM47).
• 🔧 Every year: check the integrity of the wiring, especially in kinks (near door hinges).
• 🔧 Before winter: clean the drainage holes at the bottom of the doors from dirt - this will prevent moisture from entering the actuators.
• 🔧 At the first sign of trouble:
  • If the lock begins to jam, check the voltage on the actuator (it should be 12V when activated).
  • If the key fob stops working, replace the battery (type CR2032) and reprogram it.

⚠️ Attention: If the central locking stops working after washing the car, most likely water got into the actuator connectors. In this case:

1. Remove the door cards and dry the connectors with a hairdryer (temperature no higher than 60°C).
2. Process contacts spray for electrical wiring (for example, Kontakt 60).
3. Check the fuse F10 (10A) - it often burns out during a short circuit due to moisture.

FAQ: Frequently asked questions about installing a central lock on Granta FL

Is it possible to install central locking on a Granta FL without flashing the BCM?

Yes, if used universal controller (for example, Alligator C-400 or StarLine M20). It works autonomously and does not require interference with standard electronics. However, in this case, you will lose integration with the lock button on the driver's door - the lock can only be controlled from the key fob.

Why did the rear windows stop working after installing the central locking?

This is a typical problem when connected incorrectly to the standard wiring. Most likely, you touched the power window wires (orange and gray in the driver's door harness). Solution:

1. Check fuse circuit F20 (20A).
2. Disconnect the central locking wires and check the operation of the power windows - if they work, look for a short circuit in your wiring.
3. Use decoupling diodes (for example, 1N4007) when connected to standard wires.

Which actuator is better to choose for the rear doors of Granta FL?

For rear doors FL Grants two options are optimal:

1. VALEO 475006 — original actuator, but the mounts will need modification.
2. METZGER 903004 — reinforced model with frost protection, suitable without modifications.

Avoid cheap analogues without a metal case - they often break at temperatures below -20°C.

Is it possible to connect the central locking to the alarm system so that it goes off when arming?

Yes, but there are nuances:

• If the alarm already installed, connect the central locking via decoupling relay (for example, Bosch 0 332 209 150) to avoid signal conflict.
• If you are just planning to install an alarm, choose a model with built-in central locking control (for example, Pandora DXL 3500 or StarLine A93).

Important: on Grante FL the alarm system and central locking must be powered from different fuses (for example, alarm from F30, and central locking from F15) to avoid overloading the circuit.

How much does it cost to install a central lock on a Granta FL service?

The cost depends on the type of system and region:

System type	Price of work, rub.	Notes
Standard kit (with BCM flashing)	6 000–8 000	Includes diagnostics and configuration
Universal controller (StarLine/Pandora)	4 000–6 000	No kit cost
Hybrid scheme	5 000–7 000	Includes modification of rear actuator mounts

You can save money if you install the actuators yourself and run the wires, and order only connection and programming from the service (cost ~2,000–3,000 rubles).