2009 Audi A6 Service & Repair Manual

00 - TECHNICAL DATA SAFETY PRECAUTIONS Safety Precautions Note the following when working on the fuel system:  Procedures before opening high pressure fuel injection system --> Before Opening High Pressure Fuel Injection System . To prevent personal injury and damage to the injection and ignition system, observe the following:  The ignition must be switched off before connecting or disconnecting injection and ignition system wiring or tester cables.  Only clean engine with ignition switched off.  If electrical connectors were disconnected, faults are saved in ECM:  Connect Vehicle Diagnosis, Testing and Information System VAS 5051B.  Start "Guided Functions" operating mode.  Generate readiness code in ECM.  Disconnect battery --> 27 - STARTER, GENERATOR, CRUISE CONTROL . Note the following when working on the cooling system: CAUTION: There is a risk of injury because the fuel is under very high pressure.  Before opening high pressure area of the fuel injection system, fuel pressure must be relieved to residual pressure.  To reduce remaining residual pressure, lay a clean cloth around the connector and carefully loosen connector. CAUTION: Risk of destroying electrical components when battery is disconnected.  Observe measures when disconnecting battery.  Only disconnect battery with ignition switched off. CAUTION: Risk of scalding due to hot steam and hot coolant.  When the engine is warm the cooling system is under pressure.  To reduce pressure, cover coolant reservoir cap with cloth and carefully open. 2008 Audi A6 Quattro ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH 2008 Audi A6 Quattro ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH FIXYOURCAR 1:50:32 AM Page 1 FIXYOURCAR 1:50:36 AM Page 1

If it is necessary to use testing and measuring devices on road tests, observe the following: Before Opening High Pressure Fuel Injection System Before Opening High Pressure Fuel Injection System  The fuel injection system is separated into a high-pressure section (max. approximately 120 bar) and a low-pressure section (approximately 6 bar).  Before opening high pressure area, fuel pressure must be reduced to a residual pressure of approximately 6 bar. The procedure for this is as follows. Special tools, testers and auxiliary items required  Vehicle diagnostic, testing, and information system VAS 5051B Procedure Proceed as follows: CAUTION: Distraction and improperly secured test equipment can lead to accidents. Risk of passenger airbag deploying in an accident.  Operating testing and measuring equipment while driving creates a distraction.  There is an increased risk of injury due to unsecured testing and measuring equipment.  Always secure testers on the rear seat with a strap and have a second person on the rear seat operate them. 2008 Audi A6 Quattro ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH FIXYOURCAR 1:50:33 AM Page 2

Fig. 1: Connecting Vehicle Diagnosis, Testing And Information System VAS 5051B Courtesy of VOLKSWAGEN UNITED STATES, INC.  Connect vehicle diagnosis, testing and information system VAS 5051B while the ignition is switched off. Fig. 2: Display On VAS 5051B - Vehicle Self - Diagnosis Button Courtesy of VOLKSWAGEN UNITED STATES, INC. Display on VAS 5051B :  Press Vehicle Self-Diagnosis button - 1 - in selection. 2008 Audi A6 Quattro ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH FIXYOURCAR 1:50:33 AM Page 3

Fig. 3: Display On VAS 5051 - "01 - Engine Electronics" Courtesy of VOLKSWAGEN UNITED STATES, INC. Display on VAS 5051B :  In selection - 1 - , press "01 - Engine electronics" vehicle system and continue by pressing button. Fig. 4: Display On VAS 5051 - "006 - Basic Setting" Courtesy of VOLKSWAGEN UNITED STATES, INC. Display on VAS 5051B :  In selection - 1 - , press diagnostic function "006 - Basic setting" and continue by pressing the button. 2008 Audi A6 Quattro ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH FIXYOURCAR 1:50:33 AM Page 4

Fig. 5: Display On VAS 5051 - "Display Group 140" Courtesy of VOLKSWAGEN UNITED STATES, INC. Display on VAS 5051B :  In button field - 1 - , press the 1 4 0 buttons for "Display group 140" and confirm the entry by pressing the Q button. Fig. 6: Display On VAS 5051 - (Read - Out For Fuel Pressure In Fuel Rail) Courtesy of VOLKSWAGEN UNITED STATES, INC. Display on VAS 5051B : Example: 1. 42% 2. 39.76 bar 3. 40.63 bar 4. Inactive 2008 Audi A6 Quattro ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH FIXYOURCAR 1:50:33 AM Page 5

2009 Audi A6 Service & Repair Manual

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