Audi A8 2018 Wiring Diagrams PDF | 3.0L TFSI & 4.0L TFSI Quattro

This Audi A8 2018 Wiring Diagrams Manual provides full OEM schematics for the D5 (Typ 4N) platform, including both 3.0L TFSI and 4.0L TFSI Quattro variants. It contains the most comprehensive collection of electrical system layouts for the flagship Audi sedan — ideal for technicians handling diagnostic, coding, or retrofit operations.

Systems Covered

• Air Conditioning (Comfort & Basic Circuits) – automatic climate control, sensors, blower, and compressor circuits

• ABS & ESP Systems – hydraulic unit wiring, brake pressure sensors, and control modules

• Anti-Theft / Access Systems – immobilizer, keyless entry, alarm circuits, and locking control units

• Body Control & Lighting Modules – BCM2, headlight leveling, rear lighting, and mirror modules

• Comfort & Seat Control Systems – seat memory, heating/ventilation circuits, and massage module wiring

• Communication Networks (CAN, LIN, FlexRay, MOST) – complete data bus topology with ECU mapping

• Hybrid & Auxiliary Systems – active noise control, 48V mild hybrid circuits, and cooling pumps

Table of Contents

• Air Conditioning System
   • Basic Circuit (1–3)
   • Comfort Circuit (1–5)
   • Blower, Compressor, and Temperature Sensor

• ABS & Brake Electronics
   • Hydraulic Control Unit
   • Wheel Sensors and Pressure Sensor
   • Control Module

• Anti-Theft & Central Locking
   • Immobilizer and Comfort System
   • Keyless Entry and Alarm
   • Door Control Modules

• Body Control System
   • Lighting, Headlight Leveling
   • Rear Lamp and Interior Illumination
   • Mirror and Window Modules

• Communication Networks
   • CAN, LIN, FlexRay, MOST
   • Gateway and ECU Interconnects

• Comfort & Seat Systems
   • Memory Seat Modules
   • Heating and Massage Circuits

Technical Highlights

• Factory-accurate color-coded diagrams

• Connector pinout tables and wire gauge indicators

• Ground and splice point mapping

• Data network interconnects (CAN Powertrain, CAN Comfort, MOST Infotainment)

File Information

• Format: PDF (Digital Download)

• Language: English

• Pages: 182

⚠️ Notice

Digital delivery only — no physical media is shipped. Ensure Adobe Reader or any modern PDF viewer is installed.