2022 Audi A3 (Type 8Y) Self-Study Programme 680 Overview

This article provides a detailed overview of the 2022 Audi A3 (Type 8Y), drawing information directly from the Audi Self-Study Programme 680. This program serves as a foundational reference for understanding the design, function, and new technologies introduced in this generation of the Audi A3. It covers everything from the vehicle's body structure and power units to its advanced electrical systems, safety features, and infotainment options. This comprehensive 2022 Audi A3 Self-Study Programme highlights key innovations and operational aspects for technicians and enthusiasts alike.

The 2022 Audi A3 (Type 8Y) is built on the modular transverse matrix (MQB37 W) platform, emphasizing a sporty design and integrating numerous innovations from the luxury class. The vehicle aims to offer enhanced comfort and a wider range of functions, catering to diverse customer needs. Key product strengths highlighted include its design, infotainment system, and drive systems.

Power Units and Transmission

The Audi A3 (Type 8Y) offers a range of petrol and diesel engines, each with specific codes and characteristics. Petrol engines include the 1.0 ltr. TFSI EA211evo with engine code DLAA and the 1.5 ltr. TFSI EA211evo with engine codes DPCA and DFYA. Diesel options feature the 2.0 ltr. TDI EA288evo with engine codes DSUD and DSRB. These engines are paired with various gearboxes, including the 6-speed manual gearboxes MQ200-6F and MQ281-6F, and the 7-speed dual clutch gearboxes DQ200-7F and DQ381-7F.

For automatic gearboxes, the 2022 Audi A3 (Type 8Y) introduces a new selector mechanism design, and the electromechanical parking lock now features a separate actuator, V682 parking lock actuator, to avoid altering existing gearbox constructions. The parking lock lever is still actuated via a cable. The control unit for driver multicontour seat J873 and control unit for front passenger multicontour seat J872 manage seat massage functions, with the compressor for multicontour driver seat V439 and compressor for multicontour front passenger seat V440 handling air supply. Diagnosis for these systems is performed via diagnostic address 0009 (Electronic central electrics).

Electrical and Electronic Systems

The vehicle's electrical architecture includes a 12 Volt power supply with EFB, EFB+, or AGM batteries, and a 48 Volt main electrical system for Mild Hybrid Electric Vehicles (MHEV) (PR number 0K4). The MHEV system integrates a 48 Volt lithium-ion battery A6, a voltage converter (48V/12V) A7, and a starter-alternator C29. The engine control unit J623 plays a central role in managing these systems. Diagnostic addresses for the 48 Volt battery and voltage converter are 0021 and 00C4, respectively.

Multiple bus systems facilitate communication between control units:

• Standard CAN: High-speed, 500 kbit/s.
• CAN FD: Flexible Data Rate, with bit rates up to 2 Mbit/s and payload up to 64 bytes. This is a new advancement for the Audi A3 (Type 8Y) and is used for Diagnostics CAN FD, Powertrain CAN FD, Running gear CAN FD, and Driver assist systems CAN FD.
• LIN bus: 19.2 kbit/s.
• LVDS: Low Voltage Differential Signalling, for high data transfer rates.
• Ethernet: 100 Mbit/s, used for large data transfers between units like the data bus diagnostic interface J533 and control unit 1 for information electronics J794, and between adaptive cruise control unit J428 and front camera for driver assist systems R242.

Key control units include the onboard supply control unit J519, rear lid power opening control unit J938, and emergency call module control unit and communication unit J949. The radiator blind control motor V544 and radiator blind control motor 2 V550 are activated by the engine control unit J623.

Safety Systems (Passive and Active)

The 2022 Audi A3 (Type 8Y) features a comprehensive passive safety system, including multiple airbags and belt tensioners, all managed by the airbag control unit J234. The active safety features are extensive, with various Audi pre sense functions designed to prevent or mitigate collisions.

Audi pre sense basic: Initiates measures like partial or full tensioning of electric reversible front belt tensioners, closing the panoramic sunroof, and closing side windows with a gap remaining. It also activates hazard warning lights.

Audi pre sense rear: Uses Blind Spot Monitor control unit J1086 and Blind Spot Monitor control unit 2 J1087 to detect following vehicles. Actions include rapid flashing of rear turn signals (RECAS warning) and, if the situation remains critical, closing side windows and the panoramic sunroof.

Audi pre sense front: Utilizes the adaptive cruise control sender G259, adaptive cruise control unit J428, and front camera for driver assist systems R242 to monitor traffic, pedestrians, and cyclists. It provides visual and acoustic warnings, brake jolts, and automatic braking. It can also pre-charge the brake system and reconfigure the hydraulic brake assist system.

Audi pre sense turn-off assist: Aids the driver when turning off, initiating automatic emergency braking and displaying an Audi pre sense intervention in the instrument cluster.

Audi pre sense swerve assist: Provides steering assistance and applies brakes on individual wheels to help the driver avoid collisions during swerving maneuvers.

Driver Assistance Systems

The Audi A3 (Type 8Y) offers advanced driver assistance systems:

• Lane Departure Warning: Always active after ignition. It can be switched off by pressing the button on the turn signal lever for at least 3 seconds or via the MMI menu. The system reactivates automatically after the ignition is cycled.
• Lane Center Guidance: Can be activated by briefly pressing the button on the turn signal lever. It requires active longitudinal guidance from the adaptive cruise assist.
• Emergency Assist: The third generation system in the A3 (Type 8Y) integrates the horn into its warning concept. When braking to a standstill, the horn operates cyclically below 50 km/h, sounding for 0.5 seconds with a 1-second break. It stops once the vehicle is stationary.
• Rear Cross-Traffic Assist: Uses rear radar sensors to detect approaching vehicles when reversing. Unlike previous models, it can be activated in all gear positions.
• Exit Warning System: Available for 180 seconds after ignition is switched off or after unlocking the vehicle and opening a door. It provides an acoustic warning and flashes warning lights in the exterior mirror if a collision risk is detected.
• Park Assist: Aids drivers in various parking scenarios, including parallel and perpendicular parking. The driver remains responsible for accelerating, braking, and gear selection.

Infotainment and Connectivity

The infotainment system is based on the MIB3 (third generation modular infotainment matrix). Two main versions are available: MMI radio plus and MMI navigation plus. Both feature a 10.1" MMI touch display and can be equipped with an Audi virtual cockpit plus (PR 959) with a 12.3" display. The MMI control panel E67 is a new volume control integrated into the center console.

Connectivity features include USB-C connections, with the USB hub R293 and USB connection 1 U41 providing data transfer and charging. Sound systems range from the basic plus 8RL to the Audi sound system 9VD and the Bang & Olufsen Premium Sound System 9VS.

Audi Connect services (PR IW3, IT4, IT3) offer vehicle-specific services like emergency calls, roadside assistance, and remote locking, as well as infotainment services such as online traffic information and navigation with Google Earth. The optional Audi connect key (PR 2F1) allows a smartphone to function as a car key. The head-up display J898 projects warnings and information onto the windscreen, diagnosed via address 0082. Vehicles with PR number KS4 are prepared for head-up display retrofit.

Maintenance and Service

Service intervals are displayed on the MMI and include oil change service, mileage-based service events, and time-based service events. It is crucial to reset the service interval display using a vehicle diagnostic tester after any service event. The electronically controlled damping control unit J250 and related sensors (front right turn angle sensor G1085, front left turn angle sensor G208, rear turn angle sensor G1086, front right body acceleration sender G342, front left body acceleration sender G341, rear body acceleration sender G343, front right shock absorber damping adjustment valve N337, front left shock absorber damping adjustment valve N336, rear right shock absorber damping adjustment valve N339, rear left shock absorber damping adjustment valve N338) require basic settings after renewal.

The electromechanical brake servo (brake servo control unit J539) and ABS control unit J104 must be bled and basic settings performed after renewal or circuit opening. The ESC unit Mk100 is also used. Gearbox diagnosis can be performed via address 0002.

Important Warnings and Owner Information

Audi's Self-Study Programme 680 includes critical advisories for both technicians and owners:

• General Reference: This document is not a Workshop Manual. All figures and data are for explanatory purposes only and reflect information valid at the time of writing. Always refer to the latest technical literature for maintenance and repair work.
• Interior Component Removal: Always follow the correct sequence for removing and installing components in the vehicle interior. Consult up-to-date service literature for additional information.
• Parking Lock Actuator (V682): If the locking pin T10027A is not inserted, the parking lock can be re-applied via the parking lock button E816 by cycling the ignition. If this fails, the electrical connector for the parking lock actuator must be unplugged and reconnected.
• Manual Release Handle: If the manual release handle was removed from its transport safeguard before the parking lock cable was adjusted, the actuator must first be connected electrically, and the ignition switched on. The actuator will then adjust itself to the 'P ON' position, allowing cable adjustment.
• Securing the Vehicle: Before operating the manual release mechanism for the parking lock, ensure the vehicle is secured to prevent it from rolling away.
• Service Events: It is not permitted to "miss out" service events. The information provided in the up-to-date service literature applies. Maintenance intervals are displayed when the maintenance tables are created.
• SCR System: If the warning message indicates "it will no longer be possible to start the engine after 1,000 km" due to AdBlue levels, address the issue promptly.
• Gearbox Warning: "If the red gearbox warning lamp appears in the instrument cluster, the driver is instructed not to drive any further." If a yellow lamp appears, "it is generally possible to continue driving the vehicle. A corresponding driver message informs the driver of what to do."
• Audi pre sense Warnings: Common messages include "Audi pre sense: fault. Please contact workshop", "Audi pre sense: currently restricted. Sensor view restricted due to surroundings", "Audi pre sense: currently restricted. Towing mode", "Audi pre sense: currently restricted. See owner's manual", and "Audi pre sense: emergency braking system off".
• Head-up Display Retrofit: "It is only possible to retrofit a head-up display on Audi A3 (type 8Y) vehicles with PR number KS4. It is not possible to retrofit a head-up display on vehicles equipped with KS0."
• Ethernet Fault Finding: If the message "Ethernet data bus branch X no communication" appears, check the voltage supply and cable. If "Data bus, missing message" appears, the supply and cable are likely intact.

This 2022 Audi A3 Self-Study Programme provides a foundational understanding of the vehicle's complex systems and technologies.

NHTSA ID: SSP 680