Parts and components ABS/ESP Bosch 8.1
The Bosch ESP 8.1 system is distinguished by the following functions: ABS - anti-lock braking system, ASR - traction control system, EBV - electronic brake distribution system. forces, EDS - electronic differential lock, ESP - electronic stability control system, FBS - brake protection system. overheating mechanisms (fading brake support), HBA - hydraulic brake booster, MSR - engine braking regulator, emergency brake signal. systems, Cleaner. disks, Trailer stabilization system.
The brake system has a diagonal split. Brake boost system is carried out using a vacuum amplifier. ABS faults do not affect the braking. system and strengthening in it. The brake system also performs its functions when the ABS fails. However, in the event of an ABS malfunction, a change in the brake ratio must be taken into account. forces on the axes. Once the ABS warning light comes on, the rear wheels may lock prematurely when braking. By directly connecting these components, the number of sources of errors is reduced. The components cannot be repaired, they can only be replaced.
Parts and components ABS/ESP Bosch 8.1 1. Rear right wheel speed sensor G44. Can be checked in mode "Guided troubleshooting" using diagnostics complex -VAS 5051 B- or -VAS 5052-; 2. Rear left wheel speed sensor G46; 3. ESP sensor -G419-. Installation location: under the left front seat. 9 Nm. Combined lateral acceleration sender -G200-, steering speed sender -G202- and longitudinal acceleration sender -G251-. Can be checked in mode "Guided troubleshooting" using diagnostics complex -VAS 5051 B- or -VAS 5052-. Observe installation instructions. When installing, make sure that the arrow points in the direction of travel; 4. Brake light sensor. Installation location: on the brake pedal. Can be checked in mode "Guided troubleshooting" using diagnostics complex -VAS 5051 B- or -VAS 5052-. After removal, reuse is possible; 5. Brake pedal with mount for brake light sensor; 6. Indicator lamp for electromechanical parking brake. Installation location: in the speedometer it lights up when the parking brake and ignition are on, lights up for 30 seconds when the parking brake is on and the ignition is off, flashes after the parking brake is turned on, if the braking force is not enough to prevent the vehicle from rolling back. The warning light goes out when the parking brake is off; 7. Brake warning lamp. systems. Installation location: lights up in the speedometer together with the ABS warning lamp when the ABS system fails. Flashes when the brake level is low. liquids. Flashes when there is a brake fault. systems. When you press "SET buttons" the instrument cluster displays a detailed description of the fault; 8. Anti-lock braking system warning lamp (ABS). The warning light covers the ABS system and the electronic differential lock (EDS). Installation location: in the speedometer. Lights up for a few seconds when the ignition is turned on and goes out after the automatic self-diagnosis of the ABS system, if no malfunctions are detected. A malfunction has been detected in the ABS system if the control. lamp: does not light up when the ignition is turned on, does not go out after a few seconds, lights up during a trip. The vehicle can be stopped using the service brake. systems. The change in the nature of braking should be taken into account. Electronic differential lock (EDS) and the ABS system work together. If the EDS fails, the ABS warning light comes on; 9. Electronic stability control warning lamp (ESP / ASR). Installation location: in the tachometer. Flashes while driving if the ESP/ASR system is activated. Lights up when the ignition is turned on and goes out after a short self-diagnosis. Lights up when there is a malfunction in the ESP system. Lights up when a malfunction occurs in the ABS system, because ESP and ABS work together. Lights up when ESP/ASP is disabled. Lights up during the process of adaptation of sensor technology in cases where the following occurs: the battery was disconnected and connected, the engine was started from an external source of starter current, the battery charge is too low. At the end of the sensor technology adaptation process, the ESP warning lamp goes out after a short period of time; 10. Front left wheel speed sensor G47. Can be checked in mode "Guided troubleshooting" using diagnostics complex -VAS 5051 B- or -VAS 5052-; 11. Hydraulic block N55 with used L 04; 12. Return ring. Installation location: on the steering column together with the slip ring; 13. Steering angle sender -G85-. Location: the sensor is installed on the steering column slip ring. Perform zero correction on tester -VAS 5051B- or -VAS 5052-; 14. Front right wheel speed sensor G45; 15. ASR/ESP button -E256-. The installation location depends on the model. Turning off and on the ESP / ASR system; 16. Hill start assist pressure sensor (Audi Hold Assist). Installation location: in the center console; 17. Electromechanical parking brake switch -F234-. Installation location: in the center console; 18. Diagnostic connector. Installation location: trim near the driver's feet; 19. Roof rack recognition sensor -G625-
Note. The roof rack recognition sensor -G625- is only installed in the left-hand roof rail for right- and left-hand drive vehicles. The sensor cannot be replaced as a separate part and is built into the left roof rail.
Audi starting assistant
Functioning: The assistant helps the driver in cases where it is necessary to hold the vehicle in place with the engine running often or for a long time. When the function is activated, the stopped vehicle is held by the traction assistant. The driver can take his foot off the brake pedal. First, the car is held in place by maintaining the brakes. pressure in the ESP system on all 4 wheels. In order to avoid overheating of the ESP solenoid valves during long-term parking, starting from a solenoid valve temperature of 200°C, the automatic braking force is transferred to the rear electromechanical parking brake. Automatic determination of the moment when the brake is turned off is carried out based on the following characteristics: engine torque; slope angle; gear engaged; on vehicles with manual transmission - clutch pedal travel (registered by the clutch sensor); on vehicles with automatic transmission - the beginning of the torque converter closure. In order to prevent the vehicle from rolling away, the brake is released only when sufficient engine torque is reached.
Activation: To enable the function "stand by" the following conditions must be met: the driver is wearing a seat belt; the engine is running; the driver's door is closed; There are no faults in the ESP system or the electronic parking brake. Activation is carried out by pressing switch -2- on the center console. The switch displays the following modes: deactivated, switch LED is off; "stand by", the switch LED is on; active, the switch LED lights up and is displayed in the instrument cluster "R" in green. Brake transmission force from ESP to the electronic parking brake only occurs when the instrument cluster displays "green P" and at: the temperature of the electromagnetic valves of the ESP system is not less than 200°C; opening the driver's door; unfastening the driver's seat belt; stopping the engine; turning off the ignition; pressing the switch; pressing the gas or brake pedal. When the hill start assist switch is pressed (ANA) Do not press the foot brake pedal. When the braking force is transferred from the ESP system to the electronic parking brake, the indication on the instrument cluster "green P" changes to "red P".
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