The VAZ-2123 car controller is usually located in the passenger compartment on the right side under the glove compartment

The mounting and design of the controller depends on its marking.

The controller with an electronic throttle pedal is slightly different from the controller that controls the throttle with a mechanical connection.

But the basic principle is the same.

To remove the controller, disconnect the negative terminal of the battery.

Unscrew and remove the glove compartment, article - How to remove the glove compartment of the VAZ-2123

Replacing the Niva Chevrolet controller

Using a 10 mm wrench, unscrew the protective casing fastening nut

Replacing the Niva Chevrolet controller

Removing the casing

Replacing the Niva Chevrolet controller

Using a 10 mm wrench, unscrew the three nuts securing the relay and fuse box

Replacing the Niva Chevrolet controller

Disconnect the assembly from the bracket

Replacing the Niva Chevrolet controller

Use a Phillips screwdriver to unscrew the two bracket mounting screws

Replacing the Niva Chevrolet controller

Removing the controller assembly with the bracket

Replacing the Niva Chevrolet controller

Take the retainer by the ledge

Replacing the Niva Chevrolet controller

Pull out the retainer until it stops

Replacing the controller Niva Chevrolet

After that, disconnect the wiring harness block from the controller

Location of relays and fuses in the block: 1 - additional relay (turns on the right electric fan through an additional resistor at low speed); 2 - fuse (50 A), protecting the power circuits of the additional relay and the right electric fan relay; 3 - fuse (15 A), protecting the power circuits of the electric fuel pump relay; 4 - fuse (15 A) protecting the constant power supply circuit of the controller; 5 - right electric fan relay; 6 - left electric fan relay; 7 - electric fuel pump relay; 8 - main relay; 9 - fuse (50 A) protecting the circuits of the left electric fan; 10 - fuse (15 A) protecting the power circuits switched on by the main relay; 11 - controller

Controller with relays and fuses of the engine management system

We install the controller in the reverse order.