The off-road version of this model is known as Sandero Stepway. Renault Sandero 1st generation was produced in 2008, 2009, 2010, 2011, 2012 and 2013. Afterwards, the car was updated and in 2014, 2015, 2016, 2017, 2018, 2019 and to the present, the 2nd generation Renault Sandero is supplied. We provide information describing the Renault Sandero Stepway fuses and relays, their locations, photographs and block diagrams. We will provide a video example of replacing the cigarette lighter fuse.
Please note that the number of elements in the blocks may differ from those presented and depends on the degree of electrical equipment and the year of manufacture of the car.
Block in the cabin
It is located at the end of the instrument panel.
Scheme
Decoding
| F01 (20A) | Windshield wiper; Rear window heating relay coil |
| F02 (5A) | Power supply for instrument cluster; relay windings K5 of the fuel pump and ignition coil; power supply to the engine control system ECU from the ignition switch |
| F03 (20A) | Brake signal lamps; reversing lamps; windshield washer |
| F04 (10A) | Circuits: airbag control unit; direction indicator lamps; engine management system diagnostic connector; immobilizer coils |
| F09 (10A) | Circuits: headlight bulbs of the left block headlight (low beam); signaling device for turning on low beam headlights in the instrument cluster; headlight washer pump |
| F10 (10A) | Headlight bulbs for the right headlight (low beam) |
| F11 (10A) | Left headlight headlight bulbs (high beam); high beam headlight indicator in the instrument cluster |
| F12 (10A) | Headlight bulbs for the right headlight (high beam) |
| F13 (30A) and F14 (30A) | Electric window circuits for rear and front doors, respectively |
| F15 (10A) | ABS ECU |
| F17 (15A) | Signal |
| F18 (10A) | Left side headlight lamps; side light bulbs of the left rear light; license plate lamps; illumination of the instrument cluster and controls on the instrument panel, console and floor tunnel lining; switch box buzzer |
| F19 (7.5A) | Side light bulbs for the right headlight; side light bulbs for the right rear light; glove compartment lamps |
| F20 (7.5A) | Lamps and indicator for turning on the rear fog lamp |
| F21 (5A) | Circuit of heating elements of external rear-view mirrors |
| F28 (15A) | Interior lamps; trunk lamps; constant power supply to the head unit for sound reproduction |
| F29 (15A) | Circuits: hazard warning switch; direction indicator switch; intermittent operation of the windshield wiper; central locking control; engine management system diagnostic connector |
| F30 (20A) | Central locking power circuit |
| F31 (15A) | K8 relay coil circuit for fog lights |
| F32 (30A) | Rear window defroster relay power circuit |
| F36 (30A) | Heater fan relay K1 power circuit |
| F37 (5A) | Electric drive circuits for exterior rear view mirrors |
| F38 (10A) | Cigarette lighter; power supply to the head unit for sound reproduction from the ignition switch |
| F39 (30A) | Heater fan relay K1 coil circuit |
Fuse number 38 for 10A is responsible for the cigarette lighter.
Watch the video for an example of accessing the unit, as well as replacing the cigarette lighter fuse.
Block under the hood
Scheme
Fuse designation
| F01 (60A) | Circuits: power supply to the ignition switch and all consumers powered from the lock; outdoor lighting switch |
| F02 (30A) | Cooling fan relay K3 power circuit (on a vehicle without air conditioning) |
| F03 (25A) | Power circuits: relay K5 of the fuel pump and ignition coil; main relay K6 engine control system |
| F04 (5A) | Circuits: constant power supply to the engine control system ECU; windings of the main relay K6 of the engine control system |
| F05 (15A) | Not used |
| F06 (60A) | Interior fuse box power supply circuit |
| F07 (40A) | Power circuits: air conditioning relay K4; relay K3 low speed cooling fan (on a car with air conditioning); relay K2 high speed cooling fan (on a car with air conditioning) |
| F08 (50A) and F09 (25A) | ABS ECU circuits |
Relay purpose
- K1 - heater fan relay, heater fan motor. See information about F36.
- K2 - high-speed cooling fan relay (for cars with air conditioning), radiator cooling fan electric motor.
- Short circuit - low speed cooling fan relay (for cars with air conditioning) or radiator cooling fan relay (for cars without air conditioning), cooling fan electric motor (for cars with air conditioning - through a resistor).
- K4 - air conditioning relay, compressor electromagnetic clutch.
See information about F36. - K5 - fuel pump and ignition coil relay.
- K6 - main relay of the engine control system, oxygen concentration sensor, speed sensor, fuel injectors, solenoid adsorber purge valve, relay windings K2, KZ, K4.
- K7 - headlight washer pump relay.
- K8 - fog lamp relay. See information about F31.
Renault Sandero 2
Block in the cabin
Located on the left side, under the protective cover.
Photo
Scheme
Purpose
| F1 | 30A electric front windows |
| F2 | 10A high beam left headlight |
| F3 | 10A high beam right headlight |
| F4 | 10A low beam left headlight |
| F5 | 10A high beam right headlight |
| F6 | 5A rear lights, license plate light, backlight |
| F7 | 5A front dimensions |
| F8 | 30A electric rear windows |
| F9 | 7.5A rear fog light |
| F10 | 15A horn |
| F11 | 20A central locking |
| F12 | 3A ABS/ESP |
| F13 | 10A interior lighting, air conditioning |
| F14 | 5A steering angle sensor |
| F15 | 15A windshield washer, parking radar, reversing light |
| F16 | 5A audio system, heated glass, speed limiter |
| F17 | 7.5A DRL |
| F18 | 7.5A brake light |
| F19 | 5A control system |
| F20 | 5A airbag |
| F21 | reserve |
| F22 | reserve |
| F23 | reserve |
| F24 | 15A turn signal |
| F25 | 10A anti-theft system |
| F26 | 15A electrical control unit |
| F27 | 20A steering column switches (low beam input) |
| F28 | reserve |
| F29 | 25A steering column switches (high beam input) |
| F30 | reserve |
| F31 | 10A instrument panel |
| F32 | 7.5A audio system |
| F33 | 15A cigarette lighter |
| F34 | 15A diagnostic connector |
| F35 | 5A heated exterior mirrors |
| F36 | 5A mirror drive |
| F37 | 30A starter |
| F38 | 30A windshield wiper |
| F39 | 40A air conditioner |
| R1 | 35A A/C relay |
| R2 | 35A rear defroster relay |
The cigarette lighter is controlled by fuse 33 at 15A.
If you have an upgraded car and the number of relays and fuses is different, check with.
Block under the hood
It is located in the installation compartment in the engine compartment.
Scheme
Designation
- Battery terminal
- A/C compressor diode
| Ef1 | 40A Right windshield heating element |
| Ef2 | 40A Left windshield heating element |
| Ef3 | 50A ABS/ESP |
| Ef4 | 60A Immobilizer, power supply circuit for passenger compartment fuses F28-F31 |
| Ef5 | 60A Power supply for passenger compartment fuse circuits F11, F23 - F27, F34 and F39 |
| Ef6 | 30A ABS/ESP |
| Ef7 | 30A Heated rear window and mirrors |
| Ef8 | 15A Front fog lights |
| Ef9 | 15A Heated seats |
| Ef10 | 15A Air conditioner clutch (equipment with air conditioner) / 25A First speed of the electric fan (equipment without air conditioner) |
| Ef11 | 25A Fuse for Engine Control Relay |
| Ef12 | 40A Electric cooling fan |
| Ef13 | 15A Engine control system |
| Er1 | 35A Left heated glass relay |
| Er2 | 35A Relay for right heated glass |
| Er3 | 20A Fuel pump relay |
| Er4 | 20A Relay for air conditioning compressor or first speed electric fan (depending on configuration) |
| Er5 | 35A Engine Control Relay |
Found an error or want to ask something? Write everything in the comments.
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Design of the brake system of the Renault Sandero Stepway car
The Renault Sandero Stepway is equipped with two independent braking systems: service and parking.
The first, equipped with a hydraulic drive with a vacuum booster and an anti-lock braking system (depending on the configuration), provides braking when the car is moving, the second slows the car down when parked.
The working system is dual-circuit with a diagonal connection of the brake mechanisms of the front and rear wheels. One hydraulic drive circuit ensures the operation of the right front and left rear brake mechanisms, the other - the left front and right rear.
If one of the circuits of the service brake system fails, the second circuit is used to ensure that the Renault Sandero Stepway stops with sufficient efficiency. The hydraulic drive includes a vacuum booster and a dual-circuit pressure regulator for the rear brakes.
A parking brake system with a cable drive is installed on the car on the brake mechanisms of the rear wheels.
Rice. 21. Front wheel brake mechanism Renault Sandero Stepway
1 - brake hose; 2 - air release valve; 3 - guide pin cover; 4 - brake disc; 5 - brake pads; 6 - brake caliper; 7 - pad guide
The Renault Sandero Stepway front brake mechanism is disc, with automatic adjustment of the gap between pads 5 (Fig. 21) and disc 4, with a floating caliper. The movable bracket is formed by a caliper 6 with a single-piston working cylinder.
The shoe guide 7 is bolted to the steering knuckle.
The movable bracket is bolted to guide pins 3 installed in the holes of the shoe guide. The guide pins are lubricated with grease and protected by rubber covers.
When braking, the piston, under the influence of fluid pressure, presses the inner pad against the disc; as a result of the reaction force, the caliper moves on the fingers and the outer pad is also pressed against the disc, and the pressing force of the pads is the same.
When the brake is released, the piston is moved away from the pad due to the elasticity of the sealing ring, and a small gap is formed between the pads and the disc.
Rice. 22. Master brake cylinder Renault Sandero Stepway with reservoir
1 - tank plug; 2 - reservoir of the main brake cylinder; 3, 7 - connecting sleeves; 4, 9 - connecting holes of pipelines; 5 - main brake cylinder; 6 - electrical connector of the brake fluid level sensor; 8 - piston pusher
The main brake cylinder 5 (Fig. 22) of the “tandem” type of the hydraulic brake drive consists of two separate chambers connected to independent hydraulic circuits.
The first chamber is connected to the right front and left rear brake mechanisms, the second - to the left front and right rear brake mechanisms.
A reservoir 2 is installed on the Renault Sandero Stepway master brake cylinder through rubber connecting bushings 3 and 7, the internal cavity of which is divided by a partition into two compartments. Each compartment feeds one of the master cylinder chambers.
When you press the brake pedal, the pistons of the master cylinder begin to move, the working edges of the cuffs cover the compensation holes, the chambers and the reservoir are separated and the displacement of brake fluid begins.
A brake fluid level sensor is installed in plug 1 of the reservoir. When the fluid level drops below the permissible level in the instrument cluster, the brake system malfunction warning lamp lights up.
Rice. 23. Vacuum brake booster Renault Sandero Stepway
1 - fork; 2 - lock nut; 3 - pusher; 4 - protective casing; 5 - vacuum booster mounting pin; 6 - sealing gasket; 7 - amplifier housing
The Renault Sandero Stepway vacuum brake booster (Fig. 23), installed between the pedal mechanism and the main brake cylinder, during braking, due to the vacuum in the engine intake pipe through the rod and piston of the first chamber of the main cylinder, creates additional force proportional to the force from the pedal.
A check valve is installed in the hose connecting the vacuum booster to the inlet pipe. It maintains the vacuum in the booster as it falls in the intake pipe and prevents the air-fuel mixture from entering the vacuum booster.
Rice. 24. Pressure regulator in the hydraulic rear brakes of Renault Sandero Stepway
1 - pressure regulator housing; 2 - protective cover of the regulator rod; 3 - lever; 4 - adjusting nut; 5 - earring; 6 - pipe connection fittings; 7 - regulator mounting eye
The pressure regulator changes the pressure in the hydraulic drive of the rear wheel brakes depending on the load on the rear axle of the vehicle. It is included in both circuits of the brake system, through which brake fluid flows to both rear brake mechanisms.
The regulator is bolted to the body of a Renault Sandero Stepway car. Its rod is connected to the rear suspension beam through a spring-loaded rod, lever 3 (Fig. 24) and link 5.
Depending on the distance between the beam and the body, which depends on the vehicle load, the regulator rod moves, which, in turn, with the help of a valve system, changes the cross-sectional area of the passage channels of the circuits inside the regulator, thereby limiting the pressure in the rear brake circuits.
The degree of limitation of the regulator, and therefore the pressure in the circuits, is regulated by changing the length of the regulator rod using nut 4.
Rice. 25. Renault Sandero Stepway rear brake mechanism
1 - upper tension spring; 2 - gap adjuster; 3 - clearance adjuster lever; 4.11 - support posts; 5 - spring of the clearance adjuster lever; 6 - brake mechanism shield; 7 - front brake pad; 8 - working cylinder; 9 - spacer bar; 10 - release lever for parking brake drive; 12 - rear brake pad; 13 - parking brake cable; 14 - lower tension spring
The rear wheel brake mechanism is drum-type, with automatic adjustment of the gap between the shoes and the drum. Brake pads 7 and 12 (Fig. 25) are driven by one hydraulic working cylinder 8 with two pistons. The optimal gap between the drum and the pads is maintained by a mechanical adjuster 2 mounted on the spacer bar 9.
The Renault Sandero Stepway parking (hand) brake, mechanically actuated, consists of a lever mounted on the base of the body between the front seats, a front cable with an adjusting device and an equalizer, to which two rear cables are connected and release levers installed in the brake mechanisms of the rear wheels .
The handbrake does not require special care. During routine inspection, check the condition of the drive cables. If a break in the sheaths or wires of the cables is detected, they must be replaced with new ones.
ABS system of Renault Sandero Stepway
The Renault Sandero Stepway anti-lock braking system (ABS) consists of a hydroelectronic unit with hydraulic solenoid valves, wheel speed sensors, an electrically driven pump and a warning light in the instrument cluster.
ABS serves to regulate the pressure in the brake mechanisms of all wheels when braking in difficult road conditions, preventing wheel locking.
ABS Renault Sandero Stepway provides the following advantages:
Avoiding obstacles with a higher degree of safety, including during emergency braking;
Reducing the braking distance during emergency braking while maintaining directional stability and controllability of the vehicle, including when turning.
In the event of a system malfunction, a function is provided to maintain operation during system failures.
The hydroelectronic control unit receives information about vehicle speed, direction of travel and road conditions from wheel speed sensors.
Based on this information, the control unit determines the optimal wheel braking mode, using electromagnetic valves to change the flow area of the circuits, anticipating the moment of blocking of the wheel slowing down the rotation, thereby preventing its blocking.
If the system expects a wheel to be locked, it instructs the appropriate valve to isolate the fluid supply to that wheel's wheel cylinder from the brake master cylinder.
If the rotation speed of a wheel continues to decrease compared to other wheels, the Renault Sandero Stepway ABS system returns brake fluid back to the master cylinder, reducing braking.
If all four wheels decelerate equally, the return pump will shut off and all solenoid valves will reopen, allowing the brake master cylinder to operate normally on the wheel cylinders. This cycle can be repeated up to ten times per second.
The activation of the electromagnetic valves and the return pump creates pulsations in the hydraulic drive of the brake system, they are transmitted to the brake pedal, thereby signaling to the driver that the Renault Sandero Stepway ABS is operating.
The solenoid valves in the front wheel brake circuits act on their working cylinders independently, on each separately, while the solenoid valve in the rear wheel brake circuits acts on both working cylinders simultaneously.
Since the brake system is diagonally split, a separate mechanical plunger valve in the hydraulic block separates the hydraulic output of the rear solenoid valve into two separate circuits to prevent the system from being affected by false signals, a built-in safety circuit monitors all signals entering the control block.
If a false signal is received or the voltage in the on-board electrical network is insufficient, the system automatically turns off and the ABS shutdown warning lamp lights up in the instrument cluster.
In this case, the normal operating mode of the braking system is maintained, however, when driving on a slippery road, you need to be extremely careful, since the distribution function of the system will be disrupted (the function of equalizing pressure in the brake mechanisms of the front and rear wheels) and there is a possibility of the car skidding when braking.
If a malfunction occurs in the Renault Sandero Stepway ABS system, contact a service station, as special equipment is required to diagnose the malfunction and repair it.
The hydraulic brake system is integrated into a single whole by metal tubes and hoses. The system is filled with a special brake fluid of at least DOT-4 class, which must be replaced periodically.
Renault Sandero owners periodically need to tighten the handbrake. This is due to the fact that with frequent use and gradual wear of the pads, the tense brake cable weakens. Today you will learn how to fix a problem with the handbrake in a couple of minutes, without resorting to the help of a car mechanic and without spending a penny on it.
Preparing for work
Let’s make a reservation right away: the procedure for tightening the brake cable on a Renault Sandero does not take much time and requires a minimum of tools. The most important thing is to carefully remove the plastic parts and casings without accidentally damaging them. To carry out this simple procedure, we will need:
- Key for 10;
- Flat screwdriver;
- Torx screwdriver type T20.
The wrench should be an open-end wrench, since during operation there will be very little room for “maneuver” and it is necessary that the tool used be as compact as possible, which is clearly visible in the video. It is advisable to first wrap the screwdriver with tape or tape.
This tool is needed to pry up already fragile plastic parts, so it is important that the sharp metal edges do not scratch or break this soft material.
Before starting work, it is also necessary to free up space near the central tunnel: move all things from the cup holders and shelves, remove any protective covers, if any.
Particular attention should be paid to cleaning from dirt and dust: if during disassembly foreign particles accidentally get inside the mechanism, this can lead to its failure and improper operation.
Main stage
If dismantling the tunnel and tightening the cable is being done for the first time, you need to keep in mind that the plastic will be difficult to remove. This means that you will have to apply some force, but not too much, so as not to damage anything.
Work begins with removing the central tunnel. From the end, at the feet of the rear passengers, you need to find a rectangular protective cover. You can remove it by first prying it off with a flat screwdriver. Under the cover there is an asterisk bolt, which can be easily unscrewed using the screwdriver prepared in the previous step.
By unscrewing the bolt, you can remove the tunnel itself. This is done in two stages. To begin with, it must be moved back, parallel to the floor. In this case, the brake lever itself remains in place, and the shift will be made relative to it. With the second movement, the plastic casing rises up and is set aside.
Directly below the lever, on its lower side, there is a barely noticeable protrusion made of black soft plastic. Using a flat-head screwdriver, you need to remove the cap to get to the brake cable tension nut.
By screwing it in with an open-end wrench, you can ensure that the cable stops sagging and will activate the rear pads faster. Without moving on to assembly, you need to check every time when adjusting the bolt whether the handbrake operates correctly. There is also no need to overdo it: excessive tension on the cable will lead to premature wear of the mechanisms and too much force required to activate it.
Assembly is carried out in the reverse order of the described procedure. The main thing is not to tighten the mounting bolts too much, so as not to damage the plastic and break it.
What if it didn't help?
If the mechanism on your Renault is adjusted, but still refuses to work, the problem should be looked for in a malfunction of the mechanism itself. Most often, the fault lies in the part of the mechanism that brings the pads in and out.
In this case, the lever moves quite elastically, however, even when it is brought to its highest position, the car does not lock in place.
The second reason could be wear on the rear pads. To check their condition, it is necessary to remove the rear wheel and carry out a visual inspection. If the pads are worn down to the indicator, they should be replaced and adjusted again.
Conclusion
Adjusting the hand brake on a Renault Sandero is a procedure that does not require much time or special tools. With certain knowledge, adjustment takes only a few minutes and frees the owner from painful trips to the service station, and also guarantees trouble-free operation of the parking brake and confidence in his car.
Elements of the braking system of a car with anti-lock brake system (ABS):
1 – floating bracket;
2 – front wheel brake hose;
3 – front wheel brake disc;
4 – front wheel brake tube;
5 – hydraulic drive reservoir;
6 – ABS block;
7 – vacuum brake booster;
8 – pedal assembly;
9 – brake pedal;
10 – rear parking brake cable;
11 – rear wheel brake tube;
12 – rear wheel brake hose;
13 – rear wheel brake mechanism;
14 – rear wheel brake drum;
15 – parking brake lever;
16 – indicator sensor for insufficient brake fluid level;
17 – main brake cylinder
The service brake system is hydraulic, dual-circuit with diagonal separation of the circuits. In normal mode (when the system is working) both circuits operate. If one of the circuits fails (depressurizes), the second provides braking to the vehicle, although with less efficiency.
The service brake system includes the wheel brakes, pedal assembly, vacuum booster, master cylinder, hydraulic reservoir, rear brake pressure regulator (only on vehicles without ABS), ABS unit, and connecting pipes and hoses.
Pedal assembly with vacuum booster and brake master cylinder:
1 – clutch pedal;
2 – brake signal switch;
3 – pedal unit bracket;
4 – vacuum brake booster;
5 – system hydraulic drive reservoir;
6 – main brake cylinder;
7 – brake pedal
The brake pedal is a suspended type. A brake signal switch is installed in the pedal assembly bracket in front of the brake pedal - its contacts close when the pedal is pressed.
The vacuum brake booster is located in the engine compartment between the pedal pusher and the main brake cylinder and is secured with four nuts through the front panel to the pedal bracket. The vacuum amplifier is non-separable; if it fails, it is replaced.
The brake master cylinder is attached to the vacuum booster housing with two studs. On top of the cylinder there is a reservoir for the hydraulic drive of the brake system, which contains a supply of fluid. There are markings for the maximum and minimum fluid levels on the tank body, and a sensor is installed in the tank lid, which, when the fluid level drops below the MIN mark, turns on a warning light in the instrument cluster.
When you press the brake pedal, the pistons of the master cylinder move, creating pressure in the hydraulic drive, which is supplied through tubes and hoses to the working cylinders of the wheel brake mechanisms.
Location of the pressure regulator in the hydraulic drive of the rear wheel brakes:
1 – rear suspension beam;
2 – brake hoses for the rear wheels;
3 – tubes of the brake mechanisms of the rear wheels;
4 – pressure regulator;
5 – tubes for supplying brake fluid to the pressure regulator;
6 – regulator bracket;
7 – adjusting nut of the regulator stud;
8 – pressure lever;
9 – rod adjusting sleeve;
10 – traction
On a car without ABS, fluid is supplied to the rear wheel brakes through a pressure regulator located on the underbody, between the rear suspension beam and the spare wheel stamping.
As the load on the rear axle of the vehicle increases, the adjuster rod connected to the rear suspension beam is loaded, transmitting force through the push lever to the pin and then to the two adjuster pistons.
Rear wheel brake pressure regulator parts:
1 – dirt-proof cover;
2 – support sleeve;
3 – spring;
4 – pressure regulator pin;
5 – pressure regulator pistons;
6 – pressure regulator housing;
7 – thrust washer;
8 – guide sleeve
When the brake pedal is pressed, the fluid pressure tends to push the pistons outward from the regulator body, which is prevented (through a spring) by the force from the regulator rod. When the system comes into balance, a valve located in the regulator shuts off the flow of fluid to the wheel cylinders of the rear wheel brakes, preventing further growth of braking force on the rear axle and preventing the rear wheels from locking ahead of the front wheels.
Rear wheel brake pressure regulator with levers:
1 – adjusting nut;
2 – plastic bushing;
3 – pressure lever;
4 – regulator bracket;
5 – pressure regulator;
6 – regulator rod;
7 – rod adjusting sleeve
With an increase in the load on the rear axle, when the traction of the rear wheels with the road improves, the regulator provides greater fluid pressure in the wheel cylinders of the rear wheel brake mechanisms, and, vice versa, with a decrease in the load on the rear axle (for example, when the car “pecks” during a sharp braking) pressure decreases
ABS block:
1 – control unit;
2 – hole for connecting the brake tube of the front right wheel;
3 – hole for connecting the brake tube of the rear left wheel;
4 – hole for connecting the brake tube of the rear right wheel;
5 – hole for connecting the brake tube of the front left wheel;
6 – hole for connecting the brake master cylinder tube;
7 – pump;
8 – hydraulic block
Some cars are equipped with an anti-lock braking system (ABS), which provides more efficient braking of the car by reducing the fluid pressure in the wheel brakes when they lock. Eliminates vehicle skidding and maintains controllability.
On a car with ABS, fluid from the master cylinder enters the ABS unit, and from it is supplied to the brake mechanisms of all wheels.
The ABS unit, mounted in the engine compartment on the right side member, near the bulkhead, consists of a hydraulic unit, a modulator, a pump and a control unit.
Location of the front wheel speed sensor in the hub assembly:
1 – speed sensor mounting ring;
2 – inner ring of the hub bearing;
3 – wheel speed sensor;
4 – wheel hub;
5 – steering knuckle
ABS operates depending on the signals from inductive wheel speed sensors. The front wheel speed sensor is located in the wheel hub assembly - inserted into the groove of a special sensor mounting ring, sandwiched between the end surface of the outer ring of the hub bearing and the shoulder of the steering knuckle hole for the bearing.
Front wheel speed sensor components:
1 – bearing protection washer;
2 – speed sensor;
3 – hub bearing;
4 – speed sensor mounting ring
The driving wheel for the front wheel speed sensor is the wheel bearing protector, located on one of the two end surfaces of the bearing. This dark colored washer is made of magnetic material. On the other end surface of the bearing there is a conventional light-colored protective washer made of tin.
Location of the rear wheel speed sensor master disk:
1 – brake drum;
2 – speed sensor master disk
The rear wheel speed sensor is mounted on the brake shield, and the sensor's master disk is a ring of magnetic material pressed onto the shoulder of the brake drum.
Front 1 and rear 2 wheel speed sensors
When the vehicle is braking, the ABS control unit detects the beginning of wheel locking and opens the corresponding modulator solenoid valve to relieve the pressure of the working fluid in the channel. The valve opens and closes several times per second, so you can verify that ABS is working by slightly shaking the brake pedal during braking. If a malfunction occurs in the ABS, the brake system remains operational, but the wheels may lock. In this case, the corresponding fault code is written into the control unit’s memory, which is read using special equipment at the service center.
Front wheel brake assembly:
1 – screw securing the cylinder body to the caliper;
3 – hydraulic brake bleeder fitting;
4 – bolt securing the bracket to the guide pin;
5 – guide pin;
6 – brake mechanism shield;
7 – brake disc;
8 – guide pin cover;
9 – guide block;
10 – caliper;
11 – brake pads
The front wheel brake mechanism is a disc brake with a floating caliper, which includes a caliper and a single-piston wheel cylinder, tightened together with two screws. The brake mechanisms of the front wheels of cars with engines with a displacement of 1.4 liters and 1.6 liters are the same. Some cars are equipped with brake mechanisms with ventilated discs.
Front wheel brake components:
1 – bolt securing the bracket to the guide pin;
2 – wheel cylinder body;
3 – piston protective cover;
4 – guide pin;
5 – protective cover of the guide pin;
6 – pad guide;
7 – caliper;
8 – piston
The brake pad guide is attached to the steering knuckle with two bolts, and the bracket is attached with two bolts to the guide pins installed in the pad guide holes. Protective rubber covers are installed on the fingers. Grease is placed in the holes for the pins of the pad guide. The brake pads are pressed against the guide grooves by springs.
When braking, the fluid pressure in the hydraulic drive of the brake mechanism increases and the piston, moving out of the wheel cylinder, presses the inner brake pad to the disc. Then the bracket (due to the movement of the guide pins in the holes of the pad guide) moves relative to the disc, pressing the outer brake pad against it. In the cylinder body, attached to the caliper, there is a piston with a rubber sealing ring of rectangular cross-section. Due to the elasticity of this ring, a constant optimal gap is maintained between the disc and the brake pads.
Rear wheel brake with drum removed:
1 – rear brake pad;
2 – spring cup;
3 – parking brake drive lever;
4 – spacer bar;
6 – wheel cylinder;
7 – regulator lever;
8 – regulator spring;
9 – front block;
10 – shield;
11 – parking brake cable;
12 – lower tension spring;
13 – support post
The rear wheel brake mechanism is drum-type, with a two-piston wheel cylinder and two brake pads, with automatic adjustment of the gap between the pads and the drum.
The brake mechanisms of the rear wheels of cars with engines with a displacement of 1.4 liters and 1.6 liters are the same.
The brake drum is integral with the rear wheel hub.
The automatic gap adjustment mechanism consists of a composite pad spacer bar, a regulator lever and its spring. The automatic adjustment mechanism begins to work when the gap between the pads and the brake drum increases.
Rear wheel brake components:
1 – pad pressure spring;
2 – spring cup;
3 – rear block;
4 – parking brake drive lever;
5 – upper tension spring;
6 – spacer bar;
7 – lower tension spring;
8 – regulator spring;
9 – regulator lever;
10 – front block;
11 – support stand
When you press the brake pedal, under the action of the pistons of the wheel cylinder, the pads begin to diverge and press against the drum, while the protrusion of the adjuster lever moves along the cavity between the teeth of the ratchet nut.
When the pads are worn to a certain level and the brake pedal is pressed, the adjuster lever has enough travel to turn the ratchet nut by one tooth, thereby increasing the length of the spacer bar and at the same time reducing the gap between the pads and the drum. Thus, the gradual lengthening of the spacer bar automatically maintains the gap between the brake drum and the shoes.
The wheel cylinders of the rear wheel brake mechanisms are the same. The front brake pads of the rear wheels are the same, but the rear ones are different - non-removable parking brake drive levers are installed on them in a mirror-symmetrical manner.:
Elements of the mechanism for automatically adjusting the gap between the shoes and the drum
a – the brake mechanism of the right wheel;
b – left wheel brake mechanism;
1 – regulator lever;
2 – threaded tip of the spacer bar;
3 – ratchet nut;
4 – spring stopper;
5 – spacer bar
The spacer bar and the ratchet nut of the brake mechanism of the left wheel are silver in color (the ratchet nut and the tip of the spacer bar have a right-hand thread), and the right wheel has a golden color (the ratchet nut and the tip of the spacer bar have a left-hand thread). The brake control levers of the left and right wheels are mirror-symmetrical. The right lever is marked “69”, and the left one is marked “68”:
Parking brake elements
1 – lever;
2 – front cable;
3 – cable equalizer;
4 – left rear cable;
5 – right rear cable;
6 – rear wheel brake mechanism;
7 – drum
The parking brake lever, mounted between the front seats on the floor tunnel, is connected to the front cable. An equalizer is attached to the rear end of the front cable, into the holes of which the front ends of the rear cables are inserted. The rear cable ends are connected to the parking brake drive levers mounted on the rear shoes.
During operation (until the rear brake pads are completely worn out), adjustment of the parking brake drive is not required, since lengthening the brake spacer bar compensates for the wear of the pads. The parking brake actuator only needs to be adjusted when the brake pads, cables, or parking brake lever are replaced.
