Audi A3 2018 Wiring Diagrams PDF | 2.0L TFSI & 1.4 TFSI Hybrid

This official Audi A3 2018 Wiring Diagrams manual provides the complete set of factory schematics covering every electronic system, control unit, and connector layout. It is indispensable for advanced technicians and workshops needing precise wiring paths and diagnostic insight for repairs, retrofits, or component replacements.

 Systems Covered

• Air Conditioning System (Automatic A/C Circuit 1–5 Diagrams)

• Anti-Lock Braking System (ABS) and ESP control modules

• Anti-Theft & Access/Start System (Immobilizer and KESSY)

• Body Control Modules (Steering Column, Vehicle Electrical System)

• Computer Data Lines (CAN Bus, LIN Bus, FlexRay)

• Cooling Fan and Auxiliary Circuits

• Lighting & Exterior Electrical System

• Engine Management Connections (2.0 TFSI, 1.6 TDI, 2.5 Hybrid variants)

Each circuit is drawn with OE-grade clarity, showing wire colors, splice points, connector IDs, ground locations, and component pinouts.

Table of Contents

• Air Conditioning System
   • Automatic A/C Circuit (1 – 5)
   • Temperature Sensors and Control Motors
   • HVAC Compressor and Blower Modules

• Anti-Lock Braking System (ABS)
   • Hydraulic Unit and Wheel Speed Sensors
   • Electronic Control Module Connections

• Anti-Theft and Access/Start System
   • Immobilizer Transponder and Lock Control
   • Forced Entry and Alarm Circuits (3 Diagrams)
   • Remote Keyless Entry and Interior Switches

• Body Control Modules and Interior Electronics
   • Steering Column Electronic Control Module
   • Vehicle Electrical System Control Modules (1 – 2)
   • Lighting and Signal Distribution

• Computer Data Lines
   • CAN High/Low Architecture Overview
   • Gateway Control Module Interfaces
   • Transmission, ABS, Engine, and Body Network Lines (4 Sets)

• Cooling System
   • Cooling Fan Circuits (1 – 3)
   • Coolant Temperature Sensors and Relays
   • Auxiliary Heater and Hybrid Cooling Pump

Technical Benefits

• Accurate OEM schematics for all modules and sub-systems

• Simplifies fault-tracing and module communication testing

• Cross-references between HVAC, ECM, BCM, and Gateway lines

• Supports both standard and hybrid models (2.0 TFSI / 1.4 Hybrid)

• Ideal for diagnostics using VCDS, OBDeleven, and factory VAS interfaces

 File Details

• Format: PDF (Digital Download)

• Language: English

• Pages: 157 pages

⚠️ Notice

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