2014 Audi A8 (D4) Service and Repair Manual

This 2014 Audi A8 (D4) Service & Repair Manual Covers

Engine & Powertrain

• Complete repair procedures for the 3.0L TFSI Supercharged V6 engine
• Complete repair procedures for the 4.0L TFSI Twin-Turbocharged V8 engine
• Complete repair procedures for the 6.3L W12 FSI engine (where equipped)
• Market-specific 3.0L TDI V6 and 4.2L TDI V8 diesel engine servicing
• Direct fuel injection (FSI/TFSI) diagnostics
• Supercharger and turbocharger servicing
• Engine cooling and lubrication system repairs
• Intake and exhaust system servicing
• Emissions control system diagnostics
• 8-speed Tiptronic automatic transmission servicing
• quattro permanent all-wheel drive system
• Center differential servicing
• Front and rear differential repairs
• Driveshaft and axle servicing

Suspension & Steering

• Adaptive Air Suspension diagnostics
• Electronically controlled damping system
• Front and rear multi-link suspension repairs
• Dynamic Steering diagnostics (where equipped)
• Wheel alignment specifications
• Suspension ride height calibration
• Steering rack servicing
• Wheel bearing replacement procedures

Braking Systems

• Hydraulic braking system repairs
• Anti-lock Braking System (ABS)
• Electronic Stability Control (ESC)
• Electronic Parking Brake (EPB)
• Brake Assist diagnostics
• Brake pad and rotor replacement
• Brake caliper servicing
• Brake fluid replacement procedures

Electrical Systems

• Complete factory wiring diagrams
• 12V electrical system diagnostics
• CAN Bus and LIN Bus diagnostics
• Battery Energy Management System
• Gateway control module diagnostics
• Charging and starting system diagnostics
• Fuse and relay identification
• Matrix LED headlamp diagnostics (where equipped)
• LED rear lighting diagnostics
• Exterior and interior lighting repairs
• Comfort system electronics diagnostics

Driver Assistance Systems

• Adaptive Cruise Control (where equipped)
• Audi Pre Sense Basic
• Audi Pre Sense Front (where equipped)
• Audi Side Assist (Blind Spot Monitoring) (where equipped)
• Audi Active Lane Assist (where equipped)
• Night Vision Assistant diagnostics (where equipped)
• Parking System Plus
• Rear-view camera diagnostics
• Parking sensor diagnostics

Climate Control & HVAC

• Four-zone automatic climate control diagnostics
• Air conditioning system servicing
• Refrigerant specifications
• HVAC control module diagnostics
• Heating and ventilation repairs
• Air quality sensor diagnostics

Body & Interior

• Power windows and door systems
• Central locking system
• Advanced Key (Keyless Entry and Start)
• Soft-close door diagnostics (where equipped)
• Power luggage compartment operation
• MMI Navigation Plus diagnostics
• Audi multimedia interface servicing
• BOSE and Bang & Olufsen audio system diagnostics (where equipped)
• Power seat adjustment
• Heated, ventilated, and massage seat diagnostics (where equipped)
• Ambient interior lighting repairs
• Power sunroof diagnostics

Diagnostics & Troubleshooting

• Audi Guided Fault Finding procedures
• Diagnostic Trouble Code (DTC) analysis
• Component testing procedures
• Control module diagnostics
• Coding and adaptation procedures
• Basic settings procedures
• Service interval reset procedures
• Wiring diagram interpretation

Common Error Codes Covered

This manual includes comprehensive diagnostic procedures for Audi manufacturer-specific Diagnostic Trouble Codes (DTCs) applicable to the 2014 Audi A8 (D4).

Engine Codes

• P0087 – Fuel Rail/System Pressure Too Low
• P0101 – Mass Air Flow Sensor Performance
• P0171 – System Too Lean (Bank 1)
• P0299 – Turbocharger Underboost Condition
• P0300 – Random/Multiple Cylinder Misfire Detected
• P2006 – Intake Manifold Runner Control Stuck Closed

Transmission Codes

• P0700 – Transmission Control System Malfunction
• P0715 – Input/Turbine Speed Sensor Circuit
• P0722 – Output Speed Sensor No Signal

ABS & Chassis Codes

• C1034 – Ride Height Sensor Fault
• C1146 – Electronic Parking Brake Malfunction
• C10A2 – Air Suspension Compressor Performance Fault

Network Communication Codes

• U0100 – Lost Communication with Engine Control Module
• U1111 – Function Restriction Due to Communication Fault
• U1121 – Missing Message on Data Bus

Body & Driver Assistance Codes

• B1000 – Control Module Incorrectly Coded
• B2000 – Control Module Fault
• C1103 – Adaptive Cruise Control Sensor Fault (where equipped)

The manual also includes hundreds of additional Audi-specific fault codes, guided diagnostic routines, factory wiring diagrams, control module coding procedures, adaptation instructions, and complete repair information.

Who Is This Manual For?

• Audi dealership technicians
• Independent European vehicle repair workshops
• Professional automotive mechanics
• Fleet maintenance departments
• Automotive engineering students
• Experienced DIY Audi owners

Whether you’re performing scheduled maintenance, diagnosing engine or electrical faults, servicing the supercharged or twin-turbocharged engines, repairing the quattro drivetrain, troubleshooting the adaptive air suspension, maintaining the MMI infotainment system, or servicing the available driver assistance systems, this manual provides the factory-approved procedures required to service and repair the 2014 Audi A8 (D4).