The immobilizer is an electronic unit that does not allow the engine to start without using the ignition key or using a foreign key.

An electronic code key is built into the ignition key head.

When trying to start the engine without using the ignition key with a built-in code key, the immobilizer, without receiving information about the key code, feeds the electronic control unit

engine (controller) a special code command prohibiting the start of the engine.

The immobilizer has protection against key selection, as well as protection against reading the code transmitted via the code line to the controller.

The immobilizer switches to arming mode automatically when the ignition is turned off.

Also, the immobilizer automatically exits the security mode when the ignition is turned on without the driver performing additional actions.

When the engine is started when the ignition is switched on, the immobilizer reads the code of the electronic code key built into the ignition key head.

If the read code matches the code recorded in the memory of the immobilizer, the immobilizer exits the guard mode.

After that, the controller requests information from the immobilizer about the current state of protection.

If the controller receives a response from the immobilizer that the guard is lifted, it issues a confirmation that the engine start will be allowed.

Otherwise, the controller will not issue a confirmation of the possibility of starting the engine and will not allow the operation of the ignition and fuel injection systems.

To remove the immobilizer unit, disconnect the negative terminal of the battery

Removing and installing the Hyundai Solaris immobilizer control unitRemoving and installing the Hyundai Solaris immobilizer control unit

Removing the dashboard

The immobilizer control unit is mounted on the steering column bracket

Removing and installing the Hyundai Solaris immobilizer control unitRemoving and installing the Hyundai Solaris immobilizer control unit

We press the latch and disconnect the pad from the immobilizer control unit (shown on the removed steering column)

Unscrew the mounting bolt

Removing and installing the Hyundai Solaris immobilizer control unitRemoving and installing the Hyundai Solaris immobilizer control unit

Removing the immobilizer control unit from the steering column bracket

If you need to replace the immobilizer control unit, then you need to replace the ignition lock keys and the ignition lock cylinder

After installing a new block, it needs to be reprogrammed

Install the immobilizer control unit in reverse order.