NHTSA ID Number: 10177753
Manufacturer Communication Number: 21A4S4TCHREP727
TSB/Document Date: 2020-08-06
Summary
Vehicle Preparation Section: REMOVED: "Perform TSB 2058096/1 '91 Audi
connect has no function, SOS LED is off, and SOS warning message in FPK' Perform MMI Menu Reset: 5F-Information Electronics >> Guided Functions >> Basic Settings >> Reset MMI Menu Settings Deactivate privacy mode: Main Menu >> Privacy >> Activate Privacy Settings (Turn off) Turn Vehicle Off and allow Bus Sleep Cycle
2021
A4/S4/A4 allroad
Audi
Pre-Delivery Inspection
Stock No.
Dealer Number
R.O. No.
VIN
Road test mileage out
Road test mileage in
Reminders
All items must be completed prior to customer delivery by a certified Audi
technician
Audi
recommends using an Audi
approved battery charger to prevent excessive battery discharge during inspection
Guided Fault Finding must be used, session must be completed and sent to GFF Paperless
Total PDI Test must be completed prior to any other work involving the scan tool (special function tab -> Total PDI Test)
Start Guided Fault Finding with the engine running to ensure control modules in transport mode are identified
For items marked with *, please refer to the PDI Technician Reference Document posted on ServiceNet for additional information
For items marked with **, follow instructions for stock inventory vehicle
Vehicle Preparation
Interior
Check Elsa for open campaigns and updates
Verify operation of all seat belts and latches
Verify Audi
phone box customer registration form is present
in vehicle and add the serial number from Elsa (if equipped).
See TSB 2051720
Check operation of window, lock, and seat controls*
Perform any open campaigns*
Perform diagnostic work*
Install front license plate carrier
(if necessary)*
Inspect mirrors for proper operation*
Check rear view mirror operation*
Verify operation of all interior lights
Verify operation of heated seats
Verify operation of heated rear seats (if equipped)
Exterior
Verify operation of ventilated seats (if equipped)
Check all key buttons and features*
Verify proper operation of climate control*
Inspect exterior for damage, dings, dents and surface
scratches. Report and repair any damage before delivery to
the customer
Inspect operation of all power outlets*
Lighting and Windshield
Verify operation of front Passenger Occupant Detection
System
Test exterior lighting functions
Check panoramic sunroof and sunshade operation*
Verify the glove compartment opens and closes properly
Test windshield washers. Correct aim if necessary
Settings
Trunk Inspection
Set Time source setting to “GPS” and set Auto daylight savings time to “on”*
Verify trunk is operational
Verify operation of MMI® touch
Verify operation of emergency release handle
Install wheel bolt cover removal tool from PDI kit into trunk
tool kit*
Verify tool kit is installed securely in luggage compartment
Verify inflatable spare tire and compressor are present
Set Time to “Automatic setting” and “Automatic time zone”
Verify and set language and measurement units*
Verify Speech Dialog System is operating*
Set “Entertain. Fad.” in Parking aid to an audible level*
Set spare tire pressure*
Set “Music volume while parking” to medium*
Check battery clamps for proper torque*
Set dealership location in navigation (if equipped)*
Effective 7-27-2020-US
Version 1.1
PRE-DELIVERY INSPECTION (PDI) | 1
2021
A4/S4/A4 allroad
Audi
Pre-Delivery Inspection
Settings (continued)
Driver Assistance
Turn off Manual Speed Warning (if equipped)*
Verify cruise control/ACC functionality (if equipped)
Verify Audi
side assist functionality (if equipped)
Media / Radio / SAT
Verify operation of parking system (if equipped)*
Verify operation of aux. input
Verify all vehicle Head-up display functionality (if equipped)*
Insert SD card and test function of all slots
Verify HD Radio is turned “off”*
Activate NAV and follow directions back to dealership (if
equipped)
On-Hoist Inspection
Post-Road Test Inspection
Remove transport suspension blocks (follow ELSA instruction)
Verify SOS button is green and Roadside assistance button
LED will remain off
Check steering, boots, brake system, hoses, tires and wheels
for damage
Check underside of vehicle for fluid leaks and loose components
Inspect wheel bolts for proper torque*
Install wheel locks (if equipped)
Install wheel bolt covers and center caps as supplied*
Set and store tire pressures for either sold vehicle OR stock
inventory vehicle*
It may take up to 20 minutes for the emergency call system to activate (LED turns green) after flight/transport
mode deactivation
The vehicle must not be delivered to the customer if the
emergency call function has not been successfully activated (LED lights up in green)
Interrogate fault memory and upload Diagnostic Log to GFF
Paperless Server
Check service interval and verify correct interval is displayed
Driving Performance
Check engine oil level*
Check horn operation
Check all fluid levels and top off if necessary
Verify hold and release of electronic parking brake
Ensure the yellow tire pressure tag is installed on the steering wheel
Verify engine Start-Stop System functionality*
Verify engine performance and acceleration*
Verify transmission operation, including shift paddles
Test drive vehicle applying brakes several times*
Apply 30 Day Inventory Maintenance Sticker**
Install showroom charger to ensure battery remains
charged at all times**
Check steering/tire alignment
Audi
connect® (USA ONLY) (if equipped)
Check for squeaks, rattles and wind noise. Repair any
squeaks, rattles or wind noises before delivery to the customer
Turn on the Wi-Fi® hotspot (if equipped)*
Calibrate rear view mirror*
Verify quality of radio reception in AM/FM/SiriusXM® bands
Check Wi-Fi® hotspot visibility. No data available at PDI (if
equipped)*
Enable satellite map view for navigation (if equipped)*
Technician
I certify that all operations have been completed and this vehicle has been prepared in accordance with Audi
Procedures and
Quality Standards, and has met the standards for Perfect Delivery.
Technician Signature
Effective 7-27-2020-US
Version 1.1
Last 8 of VIN
Completion Date
PRE-DELIVERY INSPECTION (PDI) | 2
- 【Looking for More Professional Vehicle Scan...
- 【OE-Level 4 Systems OBD2 Scanner】iCarsoft E...
- 【4 Systems Diagnosis for 10000+ Vehicles】 iCarsoft E...
- 【6 Reset Services】iCarsoft E660 2026 Upgrade Version is...
- 【118+ Real Time Record & Live Graph View】iCarsoft E...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 21A4S4TCHREP727
Replacement Service Bulletin Number:
MFR Communication Date: 2020-07-27
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [2026 Top-Tier Hardware and Software Upgrade]: Topdon ArtiDiag900 Lite scanner has enhanced hardware and latest features, including Android 11.0, 5x faster CPU, 10000mAh battery for 12 hours of continuous operation, stable wireless diagnosis with Bluetooth 5.0, 8-inch touchscreen. Added bi-directional control, wireless diagnosis, battery testing (optional), and DTC repair guide
- [TOPDON Bidirectional Scan Tool]: This bidirectional obd2 scanner sends commands to the vehicle's ECU for active testing, enabling users to accurately and quickly locate faulty components such as injectors, coolant pumps, windows, wipers, headlights, mirrors, etc. The bidirectional control scanner is the ideal choice for workshops/automotive repair shops as it significantly reduces mechanic's diagnostic time.
- [Wireless Bluetooth Diagnostic Experience]: The AD900 Lite scan tool comes with a Bluetooth 5.0 VCI, supporting a wireless diagnostic range of up to 33 feet (10 meters), allowing you to diagnose without being confined to cables or tight spaces. Stable and fast wireless diagnosis provides a comfortable repair environment. It also offers VCI cables to increase connectivity options.
- [DTC Repair Guide Function]: Easily diagnose issues with your vehicle and receive guidance on repairs with the topdon scan tool's fault code definitions for all systems,maximize your diagnostic capabilities. This function is compatible with Chrysler
/Dodge
/Jeep
/Fiat
2010-2014 and expanding with continual updates,the AritDiag 900 Lite car diagnostic scanner is the must-have tool for any technician or DIY enthusiast. - [OE-Level Full System Diagnostics]:AritDiag900 Lite full system diagnostic scanner can scan ALL available modules(Engine, Transmission, Airbag, ABS, ESP, TPMS, Gateway, Steering, Radio, Air conditioning, ect.) to✔read ECU info, ✔read/clear codes, ✔view live data stream, ✔retrieves freeze-frame, ✔perform active tests, and more. With just a simple click, it provides you with accurate and in-depth diagnostics.
- Dual WiFi & 10.1" Touchscreen: Provides a stable, high-speed wireless link 3x faster than bluetooth, and a responsive, professional interface. Topdon ONE obd2 scanner diagnostic tool ensures smooth, non-lagging diagnostic scan, boosting mechanic efficiency
- J2534 Pass-Thru Support: The included ONE VCI supports the J2534 standard, allowing it to function as a pass-thru device when paired with OEM diagnostic software.Through TOPDON’s RLink platform, technicians can perform dealer-level coding, expanding in-house capabilities without investing in multiple factory automotive scan tools
- OE Topology Mapping: Visualize the vehicle’s ECU network exactly as it’s built.Zoom, pan, and highlight specific modules to pinpoint component issues with precision.Topology mapping displays real-time communication between modules
- 50 Plus Service Functions: Covers high-demand services like ADAS calibration, DPF regen, TPMS reset, ABS bleed, and throttle adaptation.Expands your service menu, allows you to charge premium rates, and turns away zero jobs due to lack of tooling. Vehicle-specific functionality may vary
- Advaned ECU Coding: 10 of the most serviced brands in North America, including full ECU coding and flash hidden support for BMW
, VW
, Au-di, Benz, Porsche
, Toyota
, Ni ssan and more. Enables module replacement, feature customization, and personal settings with automatic backup or restore.Lets your shop safely offer high-margin customization services, attracting more customers and boosting profit
- Bi-Directional Control, Quickly Locate Problems: Turn your phone into a professional diagnostic tool. You can send commands from your phone to the ECU to test injectors, cooling fans, headlights, A/C clutch, windows, wipers, and more. See which one doesn't respond. Helps you quickly locate the problem and save time. No need to tear things apart, avoid blind disassembly.
- Flexible Subscription, Choose Advanced Features as Needed: TopScan Lite provides free-for-life access to core diagnostics, including full system scan, code reading, performance tests, and repair information. After purchase, advanced features (bi-directional control, service operations, live data, code clearing, and AI functions) are free-for-the-first-year. After the first year, if you want to use advanced features, you need to subscribe on a monthly, quarterly, or yearly basis. As new models and reset functions are updated, the tool will also be continuously upgraded.
- Full System Diagnostics, No Fault Hides: Unlike basic diagnostic tools that only cover 4 systems, TopScan can scan all systems. Read and clear trouble codes, view live data streams, and generate a complete vehicle health report – all issues are clear at a glance. Covers 10,000+ vehicle models and is compatible with 99.99% of vehicles.
- AI Assistant - TopFix: Think of TopFix as your personal AI mechanic. It leverages a repair database and OEM data to deliver clear, step-by-step repair solutions. Features include AI Q&A, one-click translation, and a full repair log, making your diagnostic process simpler and more efficient.
- 8+ Hot Resets, Keep Your Car in Top Shape: One-tap resets for oil, throttle, EPB, steering angle, DPF, ABS, BMS, and airbag. It enables car owners to easily perform essential maintenance, ensuring the vehicle stays in optimal condition and extends its service life.
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.




