Brake pedal sensor VAZ-2170, VESTA RENAULT 8200168238—B

Control over the operation of the vehicle, its components and assemblies is carried out by sensors. The devices transmit readings online to the electronic control unit for interpretation and response. If a discrepancy is detected by the latter, the “Check Engine” indicator appears on the dashboard. The driver makes a decision based on the data received.

List of sensors installed on Lada Vesta

1. Controller (KSUD).
2. Coolant temperature sensor (CTS).
3. Knock sensor (DS).
4. Parking sensor.
5. Crankshaft position sensor (CPS).
6. Camshaft position sensor (phase sensor).
7. Absolute pressure sensor (ABP) and air temperature sensor (ATS).
8. Parking sensor.
9. Oxygen sensor (OS) or lambda probe.
10. Fuel level sensor.
11. Mass air flow sensor (MAF) or throttle valve.
12. Vehicle speed sensor (VS).
13. ABS sensor Lada Vesta.
14. Oil pressure sensor.
15. Shock sensor.
16. Clutch and brake sensors.

New sensor

The Lada Vesta, XRAY, Largus, Granta FL uses a Renault brake sensor with catalog number 8200168238 (or 253206170R, 21700372001000).

Brake light switch adjusts automatically

depending on the position of the brake pedal. During automatic adjustment, clicks of transition through fixed positions are heard. However, it may be necessary to extend the stem slightly. To do this, pick up the antennae on both sides with an awl and pull out the rod.

If adjustment of dimension X is required more than three times, replace the brake light switch sensor.

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Source

KSUD

KSUD - engine control system controller (catalog number 21127141102062). This is the main sensor that receives data about the state of the technical equipment from the systems.

Installed in the engine compartment, on the left in the direction of travel of the car. Built into a plastic case along with power fuses.

Signs of inoperability:

• no data on the display when starting the engine;
• partial display of data;
• sound accompaniment during work.

The service life is unlimited according to the instruction manual. In practice, no more than 5 years, after which it needs to be replaced with a new one.

Vesta brake pedal sensor

Hello everyone! I would like to tell you a little about the M74 ECU and the common error “P0504 Incorrect signal from the brake pedal switches.” In connection with the transition to new toxicity standards, AVTOVAZ engineers and designers have developed a new line of M74 and M17.9.7 ECUs. The ECUs can be said to be normal, but have not yet been fully tested. After all, cars on these ECUs are very much “strangled” by toxicity standards and therefore, without reprog and installing firmware e2 or lower, you can’t drive the car in any way, but this action is not all available now, since the protocol, pads and the reprog algorithm itself have changed with the ECU, in Therefore, it is necessary to have an additional module for the programmer. Diagnostics of ECU data is already available, since all major companies have taken care of their customers and have released software updates.

Well, okay, I’ll start right away with the story of how to get rid of the error “P0504 Incorrect signal from the brake pedal switches.” Due to the fact that the ECUs were changed, AVTOVAZ began installing new sensors and IMs. There are also 2 new sensors on the brake pedal, just don’t be alarmed if you suddenly find only one. AVTOVAZ designers and engineers managed to combine 2 sensors in 1 housing, that is, only one sensor is installed on the brake pedal, but this is not so, inside the housing there is the brake pedal sensor itself and another sensor, which is popularly called “frog”. Error “P0504 Incorrect signal from the brake pedal switches” appears because the sensors are not adjusted properly from the factory. If suddenly a car with M74 or M17.9.7 came to you and the scanner produced such an error, then you can safely take the keys and adjust the sensor gap, since it is not adjusted. The sensor is adjusted in a simple way and is not difficult. There are two nuts on the sensor body. One secures the sensor to the mount from above, and the other from below. The nut that is on top regulates the sensor gap, so loosen the bottom nut a little, and then tighten the top one a little, thereby adjusting the sensor gap. In my case, the sensor was set from the factory so that the button was pressed only halfway, now I made it press almost completely. I say almost due to the fact that I left a small reserve of travel for the button, about 2 mm, so that when the brake pedal is suddenly released, the button does not get too clogged into the sensor. When you adjust the gap, then start the car, having first reset the error, and let it run for a while, since the error is not registered immediately, but after a certain period of 5-10 minutes. If the error is not registered, then you can safely take money from the client and say goodbye to him. Also, on some cars, a clutch pedal sensor is installed; it also needs adjustment, because if it is not adjusted, the car begins to stall, as it were, since the ECU thinks that the clutch pedal is depressed. I guess I'll finish here. If new information appears on the ECU data, I will post it on this forum, since it is the best.

DTOZH

Coolant temperature sensor (article 2190-1306010). Controls the temperature in the vehicle's cooling system. When a critical point is reached, it signals on the dashboard to notify the driver.

Related link:

Coolant sensor Lada Vesta.

Installed in the thermostat cover housing. Service life – 75-85 thousand km. Cannot be repaired.

Signs of inoperability:

• incorrect display of operating temperature;
• display inactive;
• unstable degree display.

Causes and symptoms of malfunction

Most often, error P0504 worries owners of Lada: Grant, Priora, Kalina and other VAZ cars with an ECU. Often a defect appears on GAZ cars, for example, GAZelle NEXT. But owners of foreign cars are less likely to contact the service to eliminate error p0504 and replace the sensor (frog). Most likely, the quality of foreign spare parts is much better. What symptoms indicate that the brake pedal sensor is faulty:

The cause of incorrect operation of the “frog” can be: mechanical damage, oxidation of contacts or wire breakage. Sometimes a failure occurs due to the burnout of both brake light bulbs. Due to the listed defects, an error appears in the system under code p0504. It can be removed, but it will appear again soon.

DD

Knock sensor (part number 2346015900). Designed to record high-frequency vibrations of the cylinder block that occur during fuel combustion.

Located on the outer wall of the cylinder block. The service life is unlimited. Cannot be repaired.

Signs of inoperability:

• difficulty starting the engine;
• Unstable engine operation at idle speed.

Execution Sequence

Comment. To check the brake light switch, turn on the ignition and press the brake pedal by hand to the amount of free play (the brake lights should light up). Release the brake pedal (the brake lights should go off). If the brake lights do not light up, check the switch and the voltage supply from the battery to the wiring harness block.

2. Turn the sensor counterclockwise 90° and remove it from the bracket.

3. Press the latch and disconnect the wiring harness block from the sensor.

4. To check the sensor, use a thin slotted screwdriver to move the rod lock to the right position.

5. Connect the multimeter in ohmmeter mode to the sensor terminals. Circuit 3-4 should be closed (resistance value is close to zero), circuit 1-2 should be open (resistance value should tend to infinity).

6. We press the sensor rod, circuit 1-2 should open (the resistance value should tend to infinity), and circuit 3-4 should close (the resistance value should be close to zero). Otherwise, the sensor must be replaced.

7. Before installation, move the rod lock to the left position. We connect the wiring harness block to the sensor. Install the sensor into the hole in the pedal bracket and turn it clockwise 90°. The brake pedal should be in its highest position.

Source

DPKV

Crankshaft position sensor (article 8200701972-B). Online, the ECU sends data on crankshaft speed and tilt angle.

Installed in the tide hole of the oil pump cover. Resource – 80-90 thousand km. Cannot be repaired.

Signs of inoperability:

• the engine does not start for a long time.

Which one to buy

Experts and service workshop specialists recommend purchasing an original brake sensor. It is of better quality and lasts longer.

Table 1. Price of brake pedal position sensor

Before changing the “frog”, you can “ring” it with a tester to make sure the part is working.

Phase sensor

Camshaft position sensor (part number A2C90920400). Informs the electronic engine control unit when the piston reaches top and bottom dead centers during the compression stroke.

Installed on the engine, below the valve covers. Resource – 90-100 thousand km. Cannot be repaired.

Signs of inoperability:

• The ECU goes into emergency mode;
• The engine is unstable at idle speed.

How to change

The sensor is located slightly above the brake pedal lever. To find it, you need to look under the torpedo. On Lada Priora, Grant and Kalina, a 19 mm open-end wrench will be required for dismantling. The replacement process looks like this:

The old sensor is quite repairable. In most cases, the cause of the malfunction is a broken spring. If you disassemble the body and install a new spring, the “frog” will work again.

Car owner's comment: On my Lada Grant, a spring broke in the sensor and began to close the contacts of the limit switches. When I left the car overnight, the ignition did not seem to turn off, which is why the battery ran out completely several times. I bought a new battery, but the problem did not go away until I made diagnostics and replaced the sensor. At the same time, the Check Engine did not light up.

DBP and DTV

Absolute pressure sensor and air temperature sensor (article 21150382821003). Informs the ECU about the amount of air consumed in order to adjust the enrichment of the combustible mixture in the combustion chamber.

Installed on the air pipe manifold. Resource – 90-100 thousand km. Cannot be repaired.

Signs of inoperability:

• the engine is unstable at idle speed;
• passive acceleration dynamics.

Handbrake tightening - instructions

On the Lada Vesta, adjusting the handbrake is much more convenient than previously in older AvtoVAZ models - now this can be done while sitting inside the car in the driver's seat. According to the manufacturer's regulations, the tightening should be done every 30,000 km, or better yet, a little earlier.

The Lada Vesta handbrake is tightened as follows:

• Raise the rear of the car so that you can manually turn the rear wheels. Fully lift and release the handbrake lever several times - this will bring the mechanism into working condition. Fully tighten the handbrake.
• Remove the plastic plug under the brake lever. Lift the rubber plug and you will see a nut on the end of the handbrake.
• Using a number 10 wrench, loosen the nut slightly and move the lever to about the second tooth.
• Tighten the nut until the rear wheels are firmly seated and cannot be turned by hand.
• Raise and lower the lever several times.

Lambda probe

Oxygen concentration sensor (part number 226A41771RF). Separates the gas flow in the exhaust manifold and informs the ECU about the gas concentration.

Installed on the outer wall of the exhaust manifold. Resource over 100,000 km. Cannot be repaired. Signs of inoperability:

• error indication on the dashboard.

Symptoms of malfunction

The main driver symptom of P0504 is the MIL (Malfunction Indicator Light) illumination. It is also called Check engine or simply “check light”.

They can also appear as:

1. The brake lights will either remain on continuously or not illuminate when the pedal is pressed.
2. It will be difficult or impossible to move.
3. The car may stall while moving if you press the brakes.
4. With this problem, cruise control cannot be activated.

Mass air flow sensor

Mass air flow sensor (article 8450020039). Installed behind the air filter housing. Reads the amount of air consumed by the engine while driving.

Related link:

Replacing spark plugs for Lada Vesta. Advice from experts, reviews, service life

Resource over 100,000 km. Cannot be repaired.

Signs of inoperability:

• error indication on the dashboard.

How to Troubleshoot or Reset Trouble Code P0504

Some suggested steps to troubleshoot and fix error code P0504:

Diagnosis and problem solving

The main problem is considered to be a discrepancy between the data in the PCM and the brake pedal sensor. Therefore, let's take a closer look and describe some suggested steps to troubleshoot and fix error code P0504.

The brake light switch is located under the instrument panel at the top of the brake pedal lever. The brake booster raises the pedal to the fully extended position. The brake light switch is mounted on a crossbar support bracket directly behind the brake pedal mounting bracket.

The only way to access the switch is to move the front seat back, lie on the backrest and look up under the dash. You will see a bracket with a switch near the top of the brake pedal lever. The switch will have four or six wires.

The switch rests on the bracket so that its drive rod is in contact with the brake pedal lever when the pedal is fully extended. At this moment, the switch is pressed on the brake pedal lever, cutting off the voltage supply.

When you press the brake pedal, the lever extends to engage the switch and turn on the brake lights. After releasing the pedal, the lever presses the bar again, turning off the brake lights.

Therefore, with a high degree of probability, we can say that replacing this sensor will eliminate problems with error P0504.

DS

Vehicle speed sensor (article 8450006894). Measures the actual speed of movement and transmits data to the electronic engine control unit.

Installed at the top, on the clutch housing cover. Resource over 100,000 km. Cannot be repaired. Signs of inoperability:

• no speedometer readings.

Basic faults

The main malfunctions of the parking brake system include:

• Reduced brake efficiency (the handbrake has to be pulled harder, higher, to lock the car in place on a slope);
• Failure to release the handbrake (manifests itself when the driver releases the handbrake lever, but the car is still held in place);
• Spontaneous release of the brake when the parking system is engaged (this is really scary, but the raised lever of the mechanism can let the driver down - the car will start to roll away).

It is worth noting that the cause of such breakdowns is not always the parking brake system assembly - it interacts with other components and assemblies of the car, so there are problems:

• Drum wear (Lada Vesta has drum brakes);
• Oily or worn pad linings.

As for the mechanism itself, the cause of the above breakdowns may be:

• Lengthening (stretching) the cable;
• Wear of drive parts, latch teeth, combs of the mechanism assembly;
• Sticky cable.

DDM

Oil pressure sensor (article 8200671275). Installed behind the cylinder head. When the minimum level is reached, the contacts close and an error signal is transmitted to the dashboard.

Resource over 100,000 km. Cannot be repaired. Signs of inoperability:

• error alarm on the car dashboard.

How to Troubleshoot or Reset Trouble Code P0504

Some suggested steps to troubleshoot and fix error code P0504:

Diagnosis and problem solving

The main problem is considered to be a discrepancy between the data in the PCM and the brake pedal sensor. Therefore, let's take a closer look and describe some suggested steps to troubleshoot and fix error code P0504.

The brake light switch is located under the instrument panel at the top of the brake pedal lever. The brake booster raises the pedal to the fully extended position. The brake light switch is mounted on a crossbar support bracket directly behind the brake pedal mounting bracket.

The only way to access the switch is to move the front seat back, lie on the backrest and look up under the dash. You will see a bracket with a switch near the top of the brake pedal lever. The switch will have four or six wires.

The switch rests on the bracket so that its drive rod is in contact with the brake pedal lever when the pedal is fully extended. At this moment, the switch is pressed on the brake pedal lever, cutting off the voltage supply.

When you press the brake pedal, the lever extends to engage the switch and turn on the brake lights. After releasing the pedal, the lever presses the bar again, turning off the brake lights.

Therefore, with a high degree of probability, we can say that replacing this sensor will eliminate problems with error P0504.

Review of Manufacturer Prices

Conclusion

Use the specified list of sensor part numbers when purchasing spare parts or new components. Despite the simplicity of the design, install the equipment in certified workshops, where they provide a quality guarantee for the work performed. If any difficulties arise, please contact the managers of the official representative offices of the car brand for advice.

Causes and symptoms of malfunction

Most often, error P0504 worries owners of Lada: Grant, Priora, Kalina and other VAZ cars with an ECU. Often a defect appears on GAZ cars, for example, GAZelle NEXT. But owners of foreign cars are less likely to contact the service to eliminate error p0504 and replace the sensor (frog). Most likely, the quality of foreign spare parts is much better. What symptoms indicate that the brake pedal sensor is faulty:

The cause of incorrect operation of the “frog” can be: mechanical damage, oxidation of contacts or wire breakage. Sometimes a failure occurs due to the burnout of both brake light bulbs. Due to the listed defects, an error appears in the system under code p0504. It can be removed, but it will appear again soon.

Reviews

Related link:

Which spark plugs are best for Lada Vesta? Motorists' opinions, advice on choosing

How to change

The sensor is located slightly above the brake pedal lever. To find it, you need to look under the torpedo. On Lada Priora, Grant and Kalina, a 19 mm open-end wrench will be required for dismantling. The replacement process looks like this:

The old sensor is quite repairable. In most cases, the cause of the malfunction is a broken spring. If you disassemble the body and install a new spring, the “frog” will work again.

Car owner's comment: On my Lada Grant, a spring broke in the sensor and began to close the contacts of the limit switches. When I left the car overnight, the ignition did not seem to turn off, which is why the battery ran out completely several times. I bought a new battery, but the problem did not go away until I made diagnostics and replaced the sensor. At the same time, the Check Engine did not light up.

Replacing the clutch pedal position sensor

On Lada Vesta, XRAY and Largus cars, removal and installation of the sensor is performed in the same way. It is located in the area of ​​the clutch pedal, next to the steering shaft:

Procedure:

1. Disconnect the block with wires (green) by pressing the latch.
2. Remove the sensor by turning it counterclockwise 90°.

Installation is carried out in the reverse order, with the brake pedal in its highest position.

Checking the clutch pedal position sensor

Vesta, Largus and XRAY got the sensor from Renault (part numbers for Vesta/Largus 253250007R and for XRAY 253255192R). To check it, you will need a multimeter (in ohmmeter mode).

Procedure:

1. Move the rod lock to the right position using a flat-head screwdriver.
2. Connect the multimeter probes to sensor terminals No. 3 and No. 4.
3. When the rod is in the free position, the circuit should be open (the resistance value approaches infinity).
4. When you press the rod, the circuit should close (the resistance value is close to zero).

Source

Old style sensor

On Lada Granta, Kalina, Priora and Lada 4×4 cars with E-Gas, a brake pedal position sensor with article number 1118-3720010 is used.

1. Screw the sensor until the pedal goes down.
2. Turn the sensor slightly (counterclockwise 90 degrees) and secure with a lock nut.

As a result, when the brake pedal is released, the switch rod should be completely “recessed”, and when the pedal is pressed, it should completely come out of the switch body. Details in the video: