4.2L V8 5V Generic Scan Tool, Engine Code(s): Bfm: Overview Audi A8 D3 facelift

OBD, General Information

> OBD Characteristics

> OBD Technical Data

> Diagnostic Tester, Connecting

> Wire and Component Test at Engine Control Module using VAG 1598/31

> Catalytic Converter Warning Lamp, Checking

Fuel Tank with Attachments, Component Overview

Scheme 696

1 - Securing strap

1. With spacer, installation position --> «Spacer installation position»(ref-289208-S07350058552008062700000)

2 - 22 Nm

3 - Fuel supply line

1. From fuel filter
2. To fuel rail line
3. To disconnect, press release button on connection piece

4 - Fuel return line

1. On vehicles with return line from engine
2. On vehicles with fuel system without return line from fuel filter
3. To disconnect, press release button on connection piece
4. Clipped in on fuel tank

5 - Vent line

6 - Ground (GND) connection

1. For discharging electrostatic charge
2. Installation position/test procedure --> «Installation position of Ground (GND) connection»(ref-289208-S00528284132008062700000)
3. Make sure connector is seated properly
4. After installing, check electrical connection of fuel filler tube to a blank portion of chassis using Ohm meter Specified value: approx. 0 ohms

7 - Cap

8 - Seal

1. Replace if damaged

9 - 22 Nm

10 - Electrical harness connector

1. For fuel tank lock switch

11 - Vent line

1. To EVAP canister at bottom in spare wheel well at vehicle floor
2. Remains on fuel tank when fuel tank is removed

12 - Fuel tank

1. Removing and installing --> «Fuel Tank with Attachments, Removing and Installing»(ref-289208-S27942985922008062700000)

13 - Socket

14 - Bracket

1. for fuel tank

15 - 22 Nm

16 - Rubber buffer

17 - Washer

18 - 22 Nm

19 - 22 Nm

20 - Securing strap

1. With spacer, installation position --> «Spacer installation position»(ref-289208-S07350058552008062700000)

21 - Retaining clip

1. For heat shield

22 - Heat shield

23 - Retaining clip

1. For heat shield

Scheme 697

1. Route Ground (GND) connection as shown in figure.
2. Ensure connector of Ground (GND) connection fits securely at metal ring of fuel filler tube (- arrow -).

Scheme 698

1. Make sure that spacers of tensions straps are seated directly under fuel tank seam (- arrow -).

Fuel Line Routing, Tank Interior, Overview

Note. (Scheme 699) shows an idealized depiction of line routing in fuel tank interior. With the exception of the line position depicted in --> Installation position of fuel delivery lines, an exact line routing is not necessary, however make sure that components have clearance to each other in general and rattling noises are prevented. (- Arrow -) points in direction of travel.

Scheme 699

1 - Left fuel delivery unit with Transfer Fuel Pump (FP) G6

2 - Fuel delivery line

1. From left suction jet pump to right fuel delivery unit

3 - Suction jet pipe

1. From right Fuel Pump (FP) to left suction jet pump

4 - Left suction jet pump

5 - Expansion tank

1. With suction jet pump to pump fuel out of expansion tank

6 - Non-return valve

1. For fuel filling line

7 - Initial fuel filling line

1. To right fuel delivery unit
2. Serves upon first filling to route a small filling quantity immediately to the fuel delivery unit

8 - Right suction jet pump

9 - Suction jet pipe

1. From right Fuel Pump (FP) to right suction jet pump

10 - Fuel delivery line

1. From right suction jet pump to left fuel delivery unit

11 - Right fuel delivery unit with Fuel Pump (FP) G23

12 - Vent line

1. To bleeder connection at top on fuel filler tube

13 - Fuel supply line

1. From left and right Fuel Pumps (FP) to connector flange

14 - Vent line

1. To EVAP canister at bottom in spare wheel well at vehicle floor

15 - Fuel filling line

1. From filler tube to non-return valve in fuel tank

16 - Fuel return line

1. From connector flange to left and right fuel delivery units

17 - Suction jet pipe

1. To suction jet pump in expansion tank

Scheme 700

Delivery lines - 1 - and - 3 - must be routed under fuel filling line - 2 - in area of left fuel tank opening.

Scheme 701

1 - Mount

1. For fuel delivery unit

2 - Fuel Level Sensor G

1. Black
2. Checking resistance values --> «Fuel Level Sensor»(ref-289208-S00909637332008062700000)
3. Removing and installing --> «Fuel Level Sensor 1, Removing and Installing»(ref-289208-S01239295202008062700000)

3 - Left fuel delivery unit

1. With Transfer Fuel Pump (FP) G6
2. Various versions, allocation
3. Fuel Pump (FP) electrical testing --> «Left Fuel Delivery Unit with Transfer Fuel Pump, Electrical Testing»(ref-289208-S33531274742008062700000)
4. Checking residual pressure: --> «24 MULTIPORT FUEL INJECTION (MFI)»(ref-289207-S35560862182008062700000)

1. Removing and installing --> «Left Fuel Delivery Unit with Transfer Fuel Pump, Removing and Installing»(ref-289208-S28111551752008062700000)

4 - Fuel delivery line

1. From suction jet pump, right side

5 - Fuel supply line

1. Connector coupling is located on right side of fuel tank
2. To disconnect, press release button on connection piece

6 - Fuel return line

1. Connector coupling is located on right side of fuel tank
2. To disconnect, press release button on connection piece

7 - Locking ring

1. Use ring nut spanner 3087 to remove and install
2. Tighten to 120 Nm

8 - Left connector flange

1. Installation position --> «Installation position of left connector flange»(ref-289208-S12351978982008062700000)

9 - Seal

1. Always replace
2. To install, place into opening of fuel tank when dry

10 - Fuel Level Sensor 3 G237

1. Gray
2. Checking resistance values --> «Fuel Level Sensor 3, Checking»(ref-289208-S41969963682008062700000)
3. Removing and installing --> «Fuel Level Sensor 3, Removing and Installing»(ref-289208-S38692521562008062700000)

Scheme 702

1. Insert new, dry seal for connector flange into opening of fuel tank.
2. Insert connector flange in fuel tank, note installation position

The tab - 2 - on connector flange must lie between tabs - 1 - and - 3 - on fuel tank.

Scheme 703

Special tools, testers and auxiliary items required

1. VAG1348/3A with VAG1348/3-2
2. VAG1526A
3. VAG1594A
4. VAS5051 with VAS5051/9

Test Prerequisites

1. Battery voltage at least 12.7 V

1. Up to model year XXX: Fuse 10 on fuse holder SF10 (relay- and fuse holder, in luggage compartment, right side) OK
2. From model year 2004: Fuse 2 on fuse holder SF2 (relay- and fuse holder, in luggage compartment, right side) OK
3. Fuel Pump (FP) 2 Relay J49 OK (in relay- and fuse holder, in luggage compartment, right side, position 3)
4. Fuel filter OK

1. Ignition switched off.

Fuel Filter with Fuel System Return Line, Component Overview

Note. Secure all hose connections using hose clamps appropriate for the model type

Scheme 704

1 - Fuel return line

1. From fuel rail pipe
2. Clipped in on fuel filter bracket
3. To disconnect, press release button on connection piece

2 - Fuel filter

1. Direction of flow is marked with (- arrows -)
2. Do not interchange connections
3. Removing and installing --> «Fuel Filter with Return Line, Removing and Installing»(ref-289208-S01229644072008062700000)

3 - Fuel supply line

1. From fuel tank
2. To disconnect, press release button on connection piece

4 - Bracket

1. For fuel filter

5 - 1.5 Nm

6 - Fuel supply line

1. To fuel rail pipe
2. To disconnect, press release button on connection piece

7 - 3 Nm

Fuel Filter without Return Line, Component Overview

Note. Secure all hose connectors with hose clamps appropriate for the model type

Scheme 705

1 - Oil filter with pressure regulator (4 bar)

1. Flow through direction is identified with - arrows
2. Do not interchange connections
3. Removing and installing --> «Fuel Filter without Return Line, Removing and Installing»(ref-289208-S38425493252008062700000)

2 - Fuel supply line

1. From fuel tank
2. To remove, press release button on connector piece

3 - Fuel return line

1. From fuel rail pipe
2. Clipped onto fuel filter bracket
3. To remove, press release button on connector piece

4 - Bracket

1. For fuel filter

5 - 1,5 Nm

6 - Fuel line

1. To fuel rail pipe
2. To remove, press release button on connector piece

7 - 3 Nm

Component Location Overview

Components A through N are not depicted in the exploded view illustration.

A - Exhaust Malfunction Indicator Lamp (MIL)

1. In instrument cluster (Meaning of lamp)
2. > «Exhaust Malfunction Indicator Lamp (MIL)»(ref-289208-S28573835062008062700000)

B - "EPC" warning lamp

1. In instrument cluster (Meaning of lamp)
2. > «EPC warning lamp»(ref-289208-S13204035892008062700000)

C - Throttle Position (TP) Sensor G79 and Accelerator Pedal Position Sensor 2 G185

1. In footwell on accelerator pedal (both sensors are stored in one housing)

D - Fuel Pump (FP) Relay J17

1. 5-pin relay carrier in passengers footwell, position 4
2. > «Relay carrier in front passengers footwell»(ref-289208-S05720140432008062700000)

E - Fuel Pump (FP) 2 Relay J49

1. Relay- and fuse holder in luggage compartment, right side, relay position 3
2. > «Relay and fuse holder, in luggage compartment, right side»(ref-289208-S15279823102008062700000)

F - Secondary Air Injection (AIR) Pump Relay J299

1. 3-pin relay carrier in E-box plenum chamber, relay position 3
2. > «Relay carrier in E-box, plenum chamber»(ref-289208-S21279856622008062700000)

G - Motronic Engine Control Module (ECM) Power Supply Relay J271

1. 4-pin relay carrier in E-box plenum chamber, relay position 3
2. > «Relay carrier in E-box, plenum chamber»(ref-289208-S21279856622008062700000)

H - Starter relay 1

1. > «Relay carrier in front passengers footwell»(ref-289208-S05720140432008062700000)

I - Starter relay 2

1. > «Relay carrier in front passengers footwell»(ref-289208-S05720140432008062700000)

J - 3-pin harness connector for Engine Speed (RPM) Sensor G28

1. > «Connector strip (bolted to underside of transmission)»(ref-289208-S13430041902008062700000)

K - 4-pin harness connector for Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor (O2S) Heater Z19 before catalytic converter

1. Bank 1
2. > «Connector assignment»(ref-289208-S39519568992008062700000)

L - 4-pin harness connector for Heated Oxygen Sensor (HO2S) 2 G108 and Oxygen Sensor (O2S) 2 Heater Z28 before catalytic converter

1. Bank 2
2. > «Connector assignment»(ref-289208-S39519568992008062700000)

M- 4-pin harness connector for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 and Oxygen Sensor (O2S) Heater 1 Z29 behind catalytic converter

1. Bank 1
2. > «Connector strip (bolted to underside of transmission)»(ref-289208-S13430041902008062700000)

N - 4-pin harness connector for Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 and Oxygen Sensor (O2S) Heater 2 Z30 behind catalytic converter

1. Bank 2
2. > «Connector strip (bolted to underside of transmission)»(ref-289208-S13430041902008062700000)

Scheme 706

1 - Evaporative Emission (EVAP) Canister Purge Regulator Valve N80

1. > «Connector assignment»(ref-289208-S39519568992008062700000)

2 - Engine Control Module (ECM) J623

1. In plenum chamber
2. > «E-box in plenum chamber»(ref-289208-S31172529262008062700000)

3 - Mass Air Flow (MAF) Sensor G70 with Intake Air Temperature (IAT) Sensor G42

4 - Camshaft Adjustment Valve 1 N205

5 - Throttle Valve Control Module J338

1. With Throttle Drive (for Electronic Power Control (EPC)) G186 , Throttle Drive Angle Sensor 1 (for Electronic Power Control (EPC)) G187 , and Throttle Drive Angle Sensor 2 (for Electronic Power Control (EPC)) G188

6 - Secondary Air Injection (AIR) Solenoid Valve N112

1. > «Secondary Air Injection (AIR) solenoid valve»(ref-289208-S29702787462008062700000)

7 - Camshaft Position (CMP) Sensor 2 G163

1. Cylinder bank 2

8 - Fuel pressure regulator

9 - Ignition coils with power output stages

1. Cylinder bank 2

10 - Camshaft Adjustment Valve 2 N208

11 - 3-pin harness connector

1. For Knock Sensor (KS) 1 G61
2. For Knock Sensor (KS) 2 G66
3. > «Connector for knock sensors»(ref-289208-S16563882572008062700000)

12 - Vacuum diaphragms for intake manifold change-over

13 - Intake Air Switch-over valve N335

1. Activation for flap in air filter

14 - Intake Manifold Change-Over Valve N156

1. Activation for both vacuum diaphragms

15 - Camshaft Position (CMP) Sensor G40

1. Cylinder bank 1

16 - Ignition coils with power output stages

1. Cylinder bank 1

17 - Secondary Air Injection (AIR) Pump Motor V101

1. Below right longmember
2. > «Secondary Air Injection (AIR) pump (below right longmember)»(ref-289208-S11886604822008062700000)

Overview: Intake manifold change-over

1 - Intake Manifold Change-Over Valve N156

1. Activation for both vacuum diaphragms

2 - Vacuum diaphragms for intake manifold change-over

3 - Intake Air Switch-over valve N335

1. Activation for flap in air filter

a - T-connector for vacuum supply from intake manifold change-over valve

b - Vacuum supply from intake manifold

c - Vacuum line to low pressure reservoir (vacuum reservoir)

d - T-connector for vacuum supply from Intake Air Switch-over valve N335 and low pressure reservoir

e - T-connector for vacuum supply from Intake Manifold Change-Over Valve N156

f - Vacuum line to flap in air filter