2009 Audi S4 Avant Service and Repair Manual

This 2009 Audi S4 Avant Service and Repair Manual covers:

Engine & Drivetrain

• 3.0L Supercharged TFSI V6 (EA837) engine
• Eaton TVS Roots-type supercharger diagnostics and servicing
• Bosch MED engine management system diagnostics
• Fuel injection and ignition system repairs
• Variable valve timing diagnostics
• Engine cooling and lubrication system servicing
• Exhaust and emissions control system repairs
• 6-speed manual transmission servicing (where equipped)
• 7-speed S tronic dual-clutch transmission diagnostics and repair (where equipped)
• quattro permanent all-wheel drive system
• Self-locking centre differential servicing
• Front and rear differential servicing
• Driveshaft and axle repairs

Chassis & Suspension

• S Sport suspension diagnostics
• Audi Drive Select diagnostics (where equipped)
• Dynamic steering diagnostics (where equipped)
• Wheel alignment specifications
• Suspension component inspection and replacement
• Wheel bearing servicing

Braking Systems

• High-performance braking system
• Anti-lock Braking System (ABS)
• Electronic Stability Control (ESC)
• Electronic Brakeforce Distribution (EBD)
• Brake Assist
• Electronic Parking Brake (EPB)
• Brake hydraulic system servicing

Electrical & Wiring

• Complete factory wiring diagrams
• CAN Bus diagnostics
• Battery Energy Management (BEM)
• Charging and starting system diagnostics
• Body Control Module (BCM)
• Power distribution, fuse, and relay assignments
• Audi MMI Navigation Plus diagnostics (where equipped)
• Audi Concert, Symphony and Bang & Olufsen audio system diagnostics (where equipped)
• Bi-Xenon headlamp diagnostics
• Exterior and interior lighting diagnostics

Driver Assistance Systems

• Audi Drive Select diagnostics
• Adaptive Cruise Control (where equipped)
• Audi Side Assist (where equipped)
• Parking System Plus
• Rear-view camera diagnostics (where equipped)
• Parking sensor diagnostics

Air Conditioning & HVAC

• Three-zone automatic climate control diagnostics
• HVAC control module servicing
• Refrigerant recovery and recharge procedures
• Heating and ventilation system repairs

Body & Interior

• Advanced Key (where equipped)
• Power tailgate diagnostics
• Power seat adjustment with memory (where equipped)
• Door locking and window control diagnostics
• Interior trim removal and installation
• Exterior body repair procedures
• Airbag (SRS) system diagnostics

Diagnostics & Troubleshooting

• Audi ODIS and VAS diagnostic procedures
• Guided Fault Finding (GFF)
• Diagnostic Trouble Code (DTC) troubleshooting
• Control module coding and adaptations
• Component testing procedures
• Service interval reset procedures

Common Error Codes Covered

This manual provides diagnostic and repair procedures for common Audi manufacturer-specific fault codes, including:

Engine Codes

• P0016 – Crankshaft/Camshaft Correlation
• P0234 – Turbo/Supercharger Overboost Condition
• P0300 – Random/Multiple Cylinder Misfire
• P0507 – Idle Speed Higher Than Expected
• P10A4 – Intake Air Bypass Valve Performance

Transmission Codes

• P17D8 – S tronic Clutch Adaptation Fault
• P0726 – Engine Speed Input Circuit Performance
• P17BF – Transmission Control Module Malfunction

ABS & Chassis Codes

• C102D – Wheel Speed Sensor Fault
• C1046 – Steering Angle Sensor Calibration Required
• C11A7 – Suspension Damping Control Fault

Network Communication Codes

• U0100 – Lost Communication With Engine Control Module
• U1113 – Function Restriction Due to Communication Fault
• U1121 – Missing Message on Data Bus

Body Control Codes

• B2000 – Body Control Module Internal Fault
• B11CF – Driver Door Control Module Communication Fault
• B126A – Central Locking System Fault

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

Who Is This Manual For?

• Audi dealership technicians
• Independent European vehicle repair workshops
• Performance vehicle specialists
• Automotive technicians
• Fleet maintenance professionals
• Experienced DIY mechanics

If you are servicing, maintaining, diagnosing, or repairing a 2009 Audi S4 Avant, this factory workshop manual provides the complete procedures and technical information required to perform repairs to Audi factory standards.