6.0l 12-cyl. 4v Generic Scan Tool, Engine Code(s): Bsb Audi A8 D3 рестайлинг

Safety Precautions

Scheme 930

1. Item 3 Electric fuel pump II relay

Scheme 931

1. Item 4 Fuel Pump (FP) Relay J17

Clean Working Conditions

When working on the fuel supply/injection system, pay careful attention to the following "5 rules" of cleanliness

1. Thoroughly clean all connections and surrounding area before disconnecting.
2. Place parts that have been removed on a clean surface and cover them. Do not use fluffy cloths!
3. Carefully cover over opened components or seal, if repairs are not performed immediately.
4. Only install clean components: Only unpack replacement parts immediately prior to installation. Do not use parts that have been stored loose (e.g. in tool boxes etc.).

1. When the system is open: Avoid working with compressed air if possible. Do not move vehicle unless absolutely necessary.

Fuel Supply System Components, Removing and Installing

> Fuel Tank With Attachments

> Fuel Tank, Draining

> Fuel Pumps, Checking

Note. Hose connections are secured with couplings or spring-type or clamp-type clips. Always replace clamp-type clips with spring-type clips. Fuel hoses at engine must only be secured with spring-type clips. The use of clamp or screw type clips is not permissible. The Spring Type Clip Pliers VAS 5024 A are recommended for installing spring-type clips.

Observe safety precautions --> Safety Precautions .

Observe rules for cleanliness --> Clean Working Conditions .

All mechanical procedures and exploded view illustrations with torque specifications are described in --> 20 - FUEL SUPPLY

Fuel tank with attachments and fuel filter, disassembling and assembling --> 20 - FUEL SUPPLY

Fuel Tank With Attachments

Note. All mechanical procedures and exploded view illustrations with torque specifications are described in --> 20 - FUEL SUPPLY

Fuel Tank, Draining

Note. All mechanical procedures and exploded view illustrations with torque specifications are described in --> 20 - FUEL SUPPLY

Fuel Pumps, Checking

Test Conditions

1. Observe safety precautions --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
2. Observe rules for cleanliness --> «Clean Working Conditions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
3. Electrical fuel pump relays must be OK --> Electrical Wiring Diagrams, Troubleshooting and Component Locations.
4. Battery voltage (both batteries) must be at least 11.5 Volts.

1. All electrical consumers such as, lights and rear window defroster must be switched off.
2. For vehicles with automatic transmission, selector lever must be in "P".
3. Parking brake must be engaged.
4. Ignition switched off.

1. The fuses must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Scheme 932

Observe safety precautions --> Safety Precautions .

Observe rules for cleanliness --> Clean Working Conditions .

Fuel pumps, checking function and voltage supply.

Fuel Pump, Right, Checking Electrical

Special tools, testers and auxiliary items required

Scheme 933

1. Remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2
2. Hand multimeter V.A.G 1526 B or V.A.G 1526 A
3. Connector test kit V.A.G 1594 C or V.A.G 1594 A
4. Vehicle Diagnostic, Testing and Information System VAS 5051 A with inductive pickup (50 A) VAS 5051/9

Test conditions

1. Observe safety precautions --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
2. Observe rules for cleanliness --> «Clean Working Conditions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
3. Battery voltage at least 12.5 V
4. Fuse 31 on fuse panel SC31 (instrument panel, right) O.K.

1. Fuel Pump (FP) Relay J17 O.K. (on relay and fuse panel in right front footwell), Socket 4.
2. Fuel filter OK.
3. Ignition switched off.

Checking voltage supply

Scheme 934

1. Pry off right cover on instrument panel, using a screwdriver - arrow -.
2. Pull out fuse 31 on fuse panel SC31 (right instrument panel, middle row, first large fuse from top).

Scheme 935

1. Connect remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2 to the left socket terminal of fuse SC31.
2. Connect alligator clip to vehicle battery (+).
3. Press switch on remote control.

1. Operating noise of the pump must be audible in vicinity of fuel tank.

Note. Fuel Pump (FP) runs quietly. Avoid surrounding noises while testing the fuel pump. If necessary, use a second technician to check.

Scheme 936

If no operating noise can be heard

1. Remove trim for luggage compartment floor.
2. Remove cover for right locking flange - arrows -.

Scheme 937

1. Carefully release and disconnect electrical harness connector - 2 - at right locking flange.

Note. Ignore - Pos. 1 -.

Scheme 938

1. Connect multimeter between terminal - 1 - and - 4 - of harness connector for voltage measurement.
2. Press switch on remote control.

1. Specification: approx. battery voltage.

If specification is not obtained

1. Repair wire connection according to wiring diagram.
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Transfer Fuel Pump (FP) G23 faulty, replace Fuel Pump (FP) unit --> «Fuel supply system components, removing and installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__fuel-supply-system-components-removing-and) , Fuel Pump (FP) unit, fuel level sensor, and suction jet pump (right side), removing and installing.
2. Erase DTC memory from Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specified value is obtained, although no running-noise can be heard at pump

1. Remove right fuel delivery unit --> «Fuel supply system components, removing and installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__fuel-supply-system-components-removing-and) .

Scheme 939

1. Check if electrical wiring between flange and fuel pump is connected and has continuity.

If no malfunction is detected in the wiring

1. Fuel pump faulty. Replace right fuel delivery unit.
2. Install right fuel delivery unit --> «Fuel supply system components, removing and installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__fuel-supply-system-components-removing-and) .

Checking current draw

1. Voltage supply of Fuel Pump (FP) OK --> Checking voltage supply under «Fuel Pumps, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

1. Pull out fuse 31 on fuse panel SC31 (right instrument panel, middle row, first large fuse from top).

Scheme 940

1. Connect remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2 to left socket terminal of fuse SC31.
2. Connect alligator clip to vehicle battery (+).
3. Connect a commercially-available current clamp to remote control wire.
4. Press switch on remote control.

1. Measure current draw of fuel pump.

1. Specification: approx. 8 A

If specification is not obtained

Note. At a displayed current draw of 4 A, Fuel Pump (FP) runs dry.

Fuel Pump Test Sequence

If specification is not obtained

1. Determine and eliminate open circuit according to electrical schematics: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Fuel Pump (FP) G23 faulty, replace fuel delivery unit, fuel delivery unit, fuel level sensor and suction jet pump (right side), removing and installing.
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Transfer Fuel Pump Test Sequence

Special tools, testers and auxiliary items required

1. Remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2
2. Hand multimeter V.A.G 1526 B or V.A.G 1526 A
3. Connector test kit V.A.G 1594 C or V.A.G 1594 A
4. Vehicle Diagnostic, Testing and Information System VAS 5051 A with inductive pickup (50 A) VAS 5051/9

Test conditions

1. Observe safety precautions --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
2. Observe rules for cleanliness --> «Clean Working Conditions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
3. Battery voltage at least 12.5 V

Scheme 941

1. Model year 2003: Fuse 10 on fuse panel SF10 (in relay and fuse panel in right of luggage compartment) O.K.

1. From model year 2004: Fuse 2 on fuse panel SF2 (in relay and fuse panel in right of luggage compartment) O.K.
2. Fuel Pump (FP) 2 Relay O.K. (on relay and fuse panel in right of luggage compartment, Socket 3)
3. Fuel filter OK.
4. Ignition switched off.

Checking voltage supply

Scheme 942

1. Remove cover of right luggage compartment side trim - arrows -.
2. Model year 2003: Pull out fuse 10 on fuse panel SF10 (in relay and fuse panel in right of luggage compartment, Socket 10).

Scheme 943

1. Connect remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2 to right socket terminal of fuse 10 on fuse panel SF10.
2. From model year 2004: Pull out fuse 2 on fuse panel SF2 (in relay and fuse panel in right of luggage compartment, Socket 2).
3. Connect remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2 to right socket terminal of fuse 2 on fuse panel SF2.
4. Connect alligator clip to vehicle battery (+).

1. Press switch on remote control.

1. Operating noise of the pump must be audible in vicinity of fuel tank.

Note. Fuel Pump (FP) runs quietly. Avoid surrounding noises while testing the fuel pump. If necessary, use a second technician to check.

If no operating noise can be heard

1. Remove trim for luggage compartment floor.

Scheme 944

1. Remove cover for left locking flange - arrows -.

Scheme 945

1. Carefully release and disconnect electrical harness connector - 2 - at left locking flange.

Note. Ignore - Pos. 1 -.

1. Connect multimeter between terminal - 1 - and - 4 - of electrical harness connector for voltage measurement.
2. Press switch on remote control.

1. Specification: approx. battery voltage.

If specification is not obtained

1. Repair wire connection according to wiring diagram.

If specified value is obtained, although no running-noise can be heard at pump

1. Remove left fuel delivery unit.

1. Check if electrical wiring between flange and fuel pump is connected and has continuity.

If no fault is detected in the wiring

1. Fuel pump faulty. Replace left fuel delivery unit.
2. Install left fuel delivery unit.

Checking current draw

1. Voltage supply of Fuel Pump (FP) OK --> Checking voltage supply under «Throttle Position Sensor, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

1. Remove cover of right luggage compartment side trim - arrows -.
2. Model year 2003: Pull out fuse 10 on fuse panel SF10 (in relay and fuse panel in right of luggage compartment, Socket 10).

1. Connect remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2 to right socket terminal of fuse 10 on fuse panel SF10.
2. From model year 2004: Pull out fuse 2 on fuse panel SF2 (in relay and fuse panel in right of luggage compartment, Socket 2).
3. Connect remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2 to right socket terminal of fuse 2 on fuse panel SF2.
4. Connect alligator clip to vehicle battery (+).

1. Connect a commercially-available current clamp to remote control wire.
2. Press switch on remote control.
3. Measure current draw of fuel pump.

1. Specification: approx. 8 A

If specification is not obtained

Note. At a displayed current draw of 4 A, Fuel Pump (FP) runs dry.

1. Determine and eliminate open circuit according to electrical schematics: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Transfer Fuel Pump (FP) G6 faulty, replace fuel delivery unit , fuel delivery unit, fuel level sensor, and suction jet pump (left side), removing and installing.
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

EVAP System

> Function of Leak Diagnostic

> EVAP System, Assembly Overview

> EVAP System Hose Routing

> EVAP Canister, Removing and Installing

> EVAP System, Checking for Proper Seal

> EVAP Canister Purge Regulator Valve 2, Checking

> EVAP Canister Purge Solenoid Valve, Removing and Installing

> Leak Detection Pump, Checking

Function of Leak Diagnostic

The EVAP system (including fuel tank) is equipped with leak diagnosis. The leak diagnosis will detect whether the system is leaking.

The diagnosis operates by pressurizing the system and should detect leaks where the damage exceeds 1 mm in diameter.

During the diagnostic, the Leak Detection Pump (LDP) V144 generates a positive pressure of approx. 30 mbar in the EVAP canister system. The pump will switch off when the pressure is attained. When the pressure falls to below a certain figure, the pump will switch on again. On Board Diagnostic monitors the switch intervals and stores a DTC in DTC memory if the intervals are too short.

Note. Hose connections are secured with screw-type clamps, spring-type clamps or tensioning clamps. Always replace tensioning clamps with sprint-type clamps or screw-type clamps. Fuel hoses at engine must only be secured with spring-type clips. The use of clamp or screw type clips is not permissible. The pliers Spring Type Clip Pliers VAS 5024 A are recommended for installing spring-type clips. Ventilation lines, connecting lines and hose connections must not have leaks. Ventilation lines and connecting lines must not be clogged or kinked. For trouble-free operation of the electrical components a voltage of at least 11.5 V is necessary. Engine Control Modules (ECM) are equipped with On-Board Diagnostics (OBD). Components marked with * are tested via On Board Diagnostic (OBD) --> Diagnostic Mode 03 - Read DTC Memory , Diagnostic mode 3: Check DTC memory.

Observe safety precautions --> Safety Precautions .

Observe rules for cleanliness --> Clean Working Conditions .

EVAP canister system components, removing and installing --> EVAP Canister, Removing and Installing .

EVAP canister system, checking for proper seal --> EVAP System, Checking for Proper Seal .

Scheme 946

1 - Cover

1. For EVAP canister

2 - Vent line

1. To Evaporative Emission (EVAP) Canister Purge Regulator Valve N80

3 - Vent line

1. To fuel tank

4 - EVAP canister

1. Component location: In bottom of spare wheel well on vehicle floor

5 - Connecting hose

1. Leak detection pump/EVAP canister

6 - Bushing

7 - Rubber grommet

8 - Stud bolt - 16 Nm

9 - Cap nut - 9 Nm

Scheme 947

1 - Intake manifold

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

1. Component location: In engine compartment

3 - Evaporative Emission (EVAP) Canister Purge Regulator Valve 2 N333

1. Component location: In engine compartment

4 - Vent line

1. From EVAP canister to EVAP canister purge regulator valves in engine compartment
2. Installed location: At right beneath vehicle floor

5 - Vent line

1. To fuel tank

6 - EVAP canister

1. Component location: In bottom of spare wheel well on vehicle floor

7 - Connecting hose

1. Leak detection pump/EVAP canister
2. Pressure side

8 - Evaporative Emission (EVAP) Canister Purge Solenoid Valve N115

1. Component location: In left rear wheel housing behind wheel housing liner

9 - Leak detection pump (LDP) V144

1. Driven by vacuum
2. Component location: In left rear wheel housing behind wheel housing liner

10 - Air filter for diagnosis pump

11 - Vacuum line

1. Delivers vacuum from intake manifold to detection pump drive

EVAP Canister, Removing and Installing

Note. Checking for leaks --> Diagnostic Mode 08 - Request Control of On-Board System, Test or Component .

Removing

Observe safety precautions --> Safety Precautions .

Observe rules for cleanliness --> Clean Working Conditions .

Scheme 948

1. Remove EVAP canister cover at bottom of spare wheel well - arrows -.

Scheme 949

1. Disconnect hose connections - 1 to 3 - at vent lines.
2. Remove stud bolts - arrows - and remove EVAP canister.

Installing

Installation is performed in reverse order of removal. Note the following

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

Torque specifications

EVAP System, Checking for Proper Seal

Function Test

1. Select measuring value "Test ID 01: Tank leak test" and check whether specified value is attained --> «Diagnostic Mode 08 - Request Control of On-Board System, Test or Component»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-08-request-control) , Diagnostic mode 8: Tank leak test.
2. Check specified value of tank leak test at idle. Specification: Test function active

Note. During tank leak test, "test function active" is limited to approx. 12 minutes. If the accelerator pedal is depressed during the test, the test will be aborted. To repeat the tank leak test, switch the ignition off, start the engine again, and let it run at idle for at least 15 minutes.

1. End diagnosis and switch ignition off.

If a leak is detected

Checking for Leaks

Note. Observe safety precautions --> Safety Precautions . Observe rules for cleanliness --> Clean Working Conditions .

If a small or large leak was recognized during the test of the EVAP canister system, proceed as follows.

1. Disconnect connecting line from diagnostic pump for fuel system at EVAP canister and seal, EVAP canister system components, removing and installing.

Note. To disengage, compress the buttons at the hose coupling.

1. Repeat function test.

If malfunction persists

1. Check connection lines and hoses between diagnostic pump for fuel system and EVAP canister for proper seal --> «EVAP System, Checking for Proper Seal»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__evap-system-checking-for-proper-seal) , EVAP canister system components, removing and installing.
2. Repeat function test.

If malfunction persists

1. Check whether fuel filler cap of fuel filler tube is completely closed or whether seal leaks; replace if necessary.
2. Check whether fuel pump locking rings are tightened or if the sealing ring leaks; replace if necessary

1. Fuel delivery unit, Fuel level sensor and suction jet pump (right side), removing and installing --> «20 - FUEL SUPPLY»(/audi/a8/d3-2005-2007/remont/fuel-system/#fuel-supply-system)
2. Fuel delivery unit, Fuel level sensor and suction jet pump (left side), removing and installing --> «20 - FUEL SUPPLY»(/audi/a8/d3-2005-2007/remont/fuel-system/#fuel-supply-system)

1. Repeat function test.

If malfunction persists

1. Remove EVAP canister and check for cracks and leaks, replace if necessary, EVAP canister system components, removing and installing.
2. Check lines and hoses between EVAP canister and fuel filler tube or Evaporative Emission (EVAP) Canister Purge Regulator Valve 2 N333 , parts of EVAP canister system, removing and installing.
3. Check hoses and hose clamps for secure seating.
4. Repeat function test.

If malfunction is no longer present

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

EVAP Canister Purge Regulator Valve 2, Checking

Solenoid valve is closed when no voltage is present.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram
4. Motronic Engine Control Module (ECM) Power Supply Relay J271 must be OK, checking: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

1. The Ground (GND) connections between engine and body must be OK.
2. Ignition switched off.
3. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

Observe safety precautions --> Safety Precautions .

Observe rules for cleanliness --> Clean Working Conditions .

1. Remove 2-pin connector from Evaporative Emission (EVAP) Canister Purge Regulator Valve 2 N333 at installation location.

Scheme 950

1. Check resistance between terminals of solenoid valve. Specification: 24.0 to 28.0 ohms

If specification is not obtained

1. Replace Evaporative Emission (EVAP) Canister Purge Regulator Valve 2 N333 --> «EVAP Canister Purge Solenoid Valve, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__evap-canister-purge-solenoid-valve-removing) .
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Check wires to control module according to wiring diagram --> «Check wires to control module»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__check-wires-to-control-module) .

Check wires to control module

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on --> Test Box, Connecting for Wiring and Component Test , connecting test box for wiring test.

Scheme 951

1. Check wire between test box socket 64 + terminal 2 of 2-pin connector for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
2. Check wire for short circuit to B+ and Ground (GND). Specification: infinity ohms
3. Check wire between 1-pin connector terminal 2 and Motronic Engine Control Module (ECM) Power Supply Relay J271 for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
4. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.

1. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no fault is detected in the wiring

1. Replace Engine Control Module (ECM) 2 J624 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

EVAP Canister Purge Solenoid Valve, Removing and Installing

Removing

Observe safety precautions --> Safety Precautions .

Observe rules for cleanliness --> Clean Working Conditions .

1. Switch ignition off.
2. Remove left rear wheel.
3. Remove left rear wheel housing liner --> «66 - EXTERIOR EQUIPMENT»(/audi/a8/d3-2005-2007/remont/door-locks-anti-theft-systems/#body-exterior) .
4. Disconnect hose connectors.

1. Disconnect electrical harness connector from Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 N115.
2. Remove vacuum hoses from Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 N115.
3. Removed solenoid valve from mounting.

Installing

Installation is performed in reverse order of removal. Note the following

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

1. Install left rear wheel housing liner --> «66 - EXTERIOR EQUIPMENT»(/audi/a8/d3-2005-2007/remont/door-locks-anti-theft-systems/#body-exterior) .

Torque specifications

Electronic Power Control

> Electronic Power Control Components, Servicing

> Accelerator Pedal Module with Throttle Position Sensors, Removing and Installing

> Throttle Position Sensor, Checking

For EPC, the throttle valve is not operated by a cable from the accelerator pedal. There is no mechanical connection between the gas pedal and the throttle valve.

The position of the accelerator pedal is communicated to the Engine Control Modules (ECMs) via two sensors for accelerator pedal position (variable resistances; stored in one housing) that are connected with the accelerator pedal.

The accelerator pedal position (drivers intention) is a main input unit for the ECMs.

Operation of the throttle valve occurs via an electric motor (throttle valve actuator) in the throttle valve control modules. This is true across the entire engine speed and engine load spectrum.

The throttle valve is operated by the throttle drive according to the instructions of the Engine Control Modules (ECMs).

With the engine at standstill and the ignition switched on, the corresponding Engine Control Module (ECM) activates the throttle drive precisely according to the specifications of the Throttle Position (TP) Sensor. This means, if the accelerator pedal is depressed half way, the throttle drive opens the throttle valve to the same degree; i.e. throttle valve is then opened approx. half way.

With engine running (under load) the engine control module can open and close the throttle valve independently of the accelerator pedal position sensor.

That way e.g. the throttle valve can already be completely opened, although the accelerator pedal is only depressed half-way. An advantage of this is that throttle losses at the throttle valve are avoided.

Aside from that, it results in clearly better pollutant output and consumption values under certain load conditions.

It would be incorrect to think that "EPC" consists of only one or two components. EPC is much more of a system containing all components that contribute to assign, control and monitor the position of the throttle valve, e.g. sensor for Throttle Position (TP) Sensor, throttle valve control module, EPC warning lamp, Engine Control Modules (ECMs).

Note. Engine Control Modules (ECM) are equipped with On-Board Diagnostics (OBD). Components marked with * are tested via On Board Diagnostic (OBD), Diagnostic mode 3: Check DTC memory.

Observe safety precautions --> Safety Precautions .

Observe rules for cleanliness --> Clean Working Conditions .

Servicing components of electronic power control (EPC) --> Electronic Power Control Components, Servicing .

Electronic Power Control Components, Servicing

Note. On vehicles with automatic transmissions, a separate Kick Down Switch F8 is installed. Kick down switch F8 , removing and installing --> Accelerator Pedal Module with Throttle Position Sensors, Removing and Installing .

Scheme 952

1 - Accelerator pedal module

1. Throttle Position (TP) Sensor G79
2. Accelerator Pedal Position Sensor 2 G185
3. Not adjustable
4. Throttle Position (TP) sensor communicates the drivers intentions to Engine Control Modules (ECMs)

1. Remove footwell cover to remove sensor
2. Checking --> «Throttle Position Sensor, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__throttle-position-sensor-checking)
3. Removing and installing --> «Accelerator Pedal Module with Throttle Position Sensors, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__accelerator-pedal-module-with-throttle-position)

2 - 10 Nm

3 - 6-pin harness connector

4 - 10 Nm

Accelerator Pedal Module with Throttle Position Sensors, Removing and Installing

Removing

Observe safety precautions --> Safety Precautions .

Observe rules for cleanliness --> Clean Working Conditions .

1. Remove driver side storage tray --> «68 - INTERIOR EQUIPMENT»(/audi/a8/d3-2005-2007/remont/gauges-instrument-panels/#body-interior) .

Scheme 953

1. Separate 6-pin connector - 2 -.
2. Remove bolts - 1 - and - 3 -.
3. Remove accelerator pedal module.

Installing

Installation is performed in reverse order of removal. Note the following

1. Install driver side storage tray --> «68 - INTERIOR EQUIPMENT»(/audi/a8/d3-2005-2007/remont/gauges-instrument-panels/#body-interior) .

Torque specifications

Throttle Position Sensor, Checking

Both Throttle Position (TP) Sensor G79 and Accelerator Pedal Position Sensor 2 G185 are located at the accelerator pedal and communicate the drivers intentions to the ECMs completely independently of each other. Both sensors are integrated into one housing.

Note. Observe safety precautions --> Safety Precautions . Observe rules for cleanliness --> Clean Working Conditions . When servicing terminals in the harness connector for the Intake Air Temperature (IAT) sensor, use only gold-plated terminals.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram
4. Battery voltage (both batteries) must be at least 11.5 Volts.

1. All electrical consumers such as, lights and rear window defroster must be switched off.
2. Parking brake must be engaged.
3. For vehicles with automatic transmission, selector lever must be in "P".
4. If the vehicle is equipped with an A/C system, this must be switched off.

1. The Ground (GND) connections between engine and body must be OK.
2. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

1. Remove cover in footwell (driver side).
2. Disconnect 6-pin connector from Throttle Position (TP) Sensor.
3. Switch ignition on.

Checking voltage supply

1. Connect multimeter to the following connector terminals for voltage measurement.
2. Terminal 1 + Ground
3. Terminal 1 +5
4. Terminal 2 + Ground

1. Terminal 2 + 3

Scheme 954

1. Specified values: at least 4.5 V
2. Switch ignition off.

If specifications are not obtained

1. Check wires to control module according to wiring diagram --> «Check wires to control module»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

1. Connect test box to Engine Control Module (ECM) 2 J623 wiring harness on, connecting test box for wiring test.
2. Check wires between test box and 6-pin connector for open circuit according to wiring diagram.
3. Terminal 1+Socket 72
4. Terminal 2+Socket 73

1. Terminal 3+Socket 36
2. Terminal 4+Socket 35
3. Terminal 5+Socket 33
4. Terminal 6+Socket 34

1. Wiring resistance: max. 1.5 ohms
2. Check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specification: infinity ohms
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring and if the voltage supply was OK

1. Replace Throttle Position (TP) sensor.
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Fuel Injection System, Servicing

> Safety Precautions

> Clean Working Conditions

> Technical Data

> Component Locations

> Intake Manifold, Disassembling and Assembling

> Fuel Rail with Injectors, Disassembling and Assembling

Note. Engine Control Modules (ECM) are equipped with On-Board Diagnostics (OBD). Always check DTC memory first, before performing repairs or troubleshooting. Also the vacuum hoses and connections must be checked (unmetered air). For trouble-free operation of the electrical components a voltage of at least 11.5 V is necessary. Do not use sealants containing silicone. Traces of silicone components which are sucked into the engine are not burned there, and they damage the oxygen sensors. The batteries must only be disconnected and connected with the ignition switched off, since the Engine Control Modules (ECM) can otherwise be damaged. Fuel hoses at engine must only be secured with spring-type clips. The use of clamp or screw type clips is not permissible. The pliers Spring Type Clip Pliers VAS 5024 A are recommended for installing spring-type clips. Vacuum lines and hose connections must not have leaks. Vacuum hoses must not be clogged or kinked. Components marked are tested via On Board Diagnostic (OBD), Diagnostic mode 3: Check DTC memory. During some checks it is possible that the control module will detect and store a malfunction. Therefore the following work steps must be performed in the mentioned sequence after ending all tests and repairs. Check DTC memory; Diagnostic mode 3: Check DTC memory, Erase DTC memory --> Diagnostic Mode 04 - Erase DTC Memory , Diagnostic mode 4: Reset/erase diagnostic data, For completion, generate readiness code --> Readiness Code, Generating .

Electrical Wiring Diagrams, Troubleshooting and Component Locations.

1. Fuse holder in right of instrument panel.

Safety Precautions for Road Tests

If test and measuring equipment is required during road test, note the following

When working on the fuel supply/injection system, pay careful attention to the following "5 rules" of cleanliness

1. Thoroughly clean all connections and the surrounding area before disconnecting.
2. Place parts that have been removed on a clean surface and cover them. Do not use fluffy cloths!
3. Carefully cover over opened components or seal, if repairs are not performed immediately.
4. Only install clean components: Only unpack replacement parts immediately prior to installation. Do not use parts that have been stored loose (e.g. in tool boxes etc.).

1. When the system is open: Avoid working with compressed air if possible. Do not move vehicle unless absolutely necessary.

Technical Data

Component Locations

Components A through E are not shown in the exploded view illustration.

Scheme 955

A - Brake Light Switch F and Brake Pedal Switch F47

1. In footwell at brake pedal

B - Diagnostic connector

1. Located in knee bolster on drivers side

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

1. In footwell on accelerator pedal (both sensors are integrated into one housing)

D - "MIL" Warning lamp

1. In instrument cluster

E - "EPC" indicator lamp

1. In instrument cluster

1 - Mass air flow (MAF) sensor 2 G246 with intake air temperature (IAT) sensor 2 G299

1. For cylinder bank 2 (cylinders 7 to 12)

Note. The intake channels cross in the center of the intake manifold. The mass air flow sensor 2 G246 on the right side (as seen in driving direction) therefore measures the intake air mass for cylinder bank 2 on the left side (as seen in driving direction). The same applies to the Intake Air Temperature (IAT) Sensor 2 G299.

2 - Electrical connections for oxygen sensors, from.

3 - Throttle valve control module 2 J544

1. With throttle drive 2 (power accelerator actuation) G296 , angle sensor 1 (on throttle drive 2 power accelerator actuation) G297 and angle sensor 2 (on throttle drive 2 power accelerator actuation) G298
2. For cylinder bank 2 (cylinders 7 to 12)
3. Pay attention to first phrase in above mentioned note.

4 - Engine control module (ECM) 2

1. In E-box in plenum chamber
2. Mark before disconnecting, to prevent switching with engine control module (ECM) 1

5 - Engine control module (ECM) 1

1. In the E-box in plenum chamber
2. Mark before disconnecting, to prevent switching with engine control module (ECM) 2

6 - Bank 1 camshaft position (CMP) sensor 3 G300

1. For exhaust camshaft
2. Cylinder bank 1

7 - Camshaft position (CMP) sensor 2 G163 ; (Bank 2, camshaft position sensor)

1. For intake camshaft
2. Cylinder bank 2

8 - Camshaft position (CMP) sensor G40 ; (Bank 1, camshaft position sensor)

1. For intake camshaft
2. Cylinder bank 1

9 - Engine Speed (RPM) Sensor G28

10 - Bank 2 camshaft position (CMP) sensor 4 G301

1. For exhaust camshaft
2. Cylinder bank 2

11 - Throttle Valve Control Module J338

1. With throttle drive (power accelerator actuation) G186 , angle sensor 1 for throttle drive (power accelerator actuation) G187 and angle sensor 2 for throttle drive (power accelerator actuation) G188
2. For cylinder bank 1 (cylinders 1 to 6)

12 - Mass air flow (MAF) sensor G70 with intake air temperature (IAT) sensor G42

1. For cylinder bank 1 (cylinders 1 to 6)

Note. The intake channels cross in the center of the intake manifold. The mass air flow (MAF) sensor G70 on the left side (as seen in driving direction) therefore measures the intake air mass for cylinder bank 1 on the right side (as seen in driving direction). The same applies to the intake air temperature (IAT) sensor G42.

13 - Mechanical EGR valve

14 - Mechanical EGR valve

15 - Secondary Air Injection (AIR) Pump Motor 2 V189

1. For cylinder bank 2
2. In lower part of air filter housing

16 - Secondary air injection (AIR) pump motor V101

1. For cylinder bank 1
2. In lower part of air filter housing

Oxygen sensor connector

Scheme 956

1 - Connector for heated oxygen sensor (HO2S) 3 G285 , before catalytic converter

1. Exhaust bank 3 (cylinder 7, 8, 9)
2. 6-pin black

2 - Connector for heated oxygen sensor (HO2S) 4 G286 , before catalytic converter

1. Exhaust bank 4 (cylinder 10, 11, 12)
2. 6-pin brown

3 - Connector for Oxygen Sensor (O2S) 3 Behind Three Way Catalytic Converter (TWC) G287

1. Exhaust bank 3 (cylinder 7, 8, 9)
2. 4-pin green

4 - Connector for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130.

1. Exhaust bank 1 (cylinder 1, 2, 3)
2. 4-pin black

5 - Connector for oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131.

1. Exhaust bank 2 (cylinder 4, 5, 6)
2. 4-pin brown

6 - Connector for Oxygen Sensor (O2S) 4 Behind Three Way Catalytic Converter (TWC) G288

1. Exhaust bank 4 (cylinder 10, 11, 12)
2. 4-pin gray

7 - Connector for heated oxygen sensor (HO2S) 2 G108 , before catalytic converter

1. Exhaust bank 2 (cylinder 4, 5, 6)
2. 6-pin brown

8 - Connector for heated oxygen sensor (HO2S) G39 , before catalytic converter

1. Exhaust bank 1 (cylinder 1, 2, 3)
2. 6-pin black

Note. For this overview, the intake manifold is removed.

Scheme 957

1 - Camshaft Adjustment Valve 1 (exhaust) N318

2 - Camshaft Adjustment Valve 1 N205 Intake

3 - Map Controlled Engine Cooling Thermostat F265

4 - Item 4 is not on USA vehicles!

5 - Camshaft Adjustment Valve 2 N208

6 - Camshaft Adjustment Valve 2 (exhaust) N319

7 - Ignition coils with power output stages, Cylinder bank 2

1. Ignition Coil 7 with Power Output Stage N325
2. Ignition Coil 8 with Power Output Stage N326
3. Ignition Coil 9 with Power Output Stage N327
4. Ignition Coil 10 with Power Output Stage N328

1. Ignition Coil 11 with Power Output Stage N329
2. Ignition Coil 12 with Power Output Stage N330

Note. The number of each cylinder is stamped into the valve cover.

8 - Fuel injectors, Cylinder bank 2

1. Cylinder 7 Fuel Injector N85
2. Cylinder 8 Fuel Injector N86
3. Cylinder 9 Fuel Injector N299
4. Cylinder 10 Fuel Injector N300

1. Cylinder 11 Fuel Injector N301
2. Cylinder 12 Fuel Injector N302

Note. The number of each cylinder is stamped into the valve cover.

9 - Fuel injectors, Cylinder bank 1

1. Cylinder 1 Fuel Injector N30
2. Cylinder 2 Fuel Injector N31
3. Cylinder 3 Fuel Injector N32
4. Cylinder 4 Fuel Injector N33

1. Cylinder 5 Fuel Injector N83
2. Cylinder 6 Fuel Injector N84

10 - Ignition coils with power output stages, Cylinder bank 1

1. Ignition Coil 1 with Power Output Stage N70
2. Ignition Coil 2 with Power Output Stage N127
3. Ignition Coil 3 with Power Output Stage N291
4. Ignition Coil 4 with Power Output Stage N292

1. Ignition Coil 5 with Power Output Stage N323
2. Ignition Coil 6 with Power Output Stage N324

11 - Right Electro-Hydraulic Engine Mount Solenoid Valve N145

Note. The oxygen sensors, exhaust manifold and primary catalytic converter are shown below. The engine is equipped with a total of eight oxygen sensors. To keep the illustration simple, the crankcase and cylinders (number 1 to 12) are only shown in schematic form. The oxygen sensors, exhaust manifolds and primary catalytic converter are, however, shown as they are installed in the vehicle. Arrow points in direction of travel.

Scheme 958

I - Primary catalytic converter for cylinders 1, 2, 3; also referred to as -exhaust bank 1-.

II - Primary catalytic converter for cylinders 4, 5, 6; also referred to as -exhaust bank 2-.

III - Primary catalytic converter for cylinders 7, 8, 9; also referred to as -exhaust bank 3-.

IV - Primary catalytic converter for cylinders 10, 11, 12; also referred to as -exhaust bank 4-.

1.1 - Heated Oxygen Sensor (HO2S) G39 with oxygen sensor heater; before catalytic converter

1. Exhaust bank 1 (cylinder 1, 2, 3)

1.2 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 with oxygen sensor heater

1. Exhaust bank 1 (cylinder 1, 2, 3)

2.1 - Heated Oxygen Sensor (HO2S) 2 G108 with oxygen sensor heater; before catalytic converter

1. Exhaust bank 2 (cylinder 4, 5, 6)

2.2 - Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 with oxygen sensor heater

1. Exhaust bank 2 (cylinder 4, 5, 6)

3.1 - Heated Oxygen Sensor (HO2S) 3 G285 with oxygen sensor heater; before catalytic converter

1. Exhaust bank 3 (cylinder 7, 8, 9)

3.2 - Oxygen Sensor (O2S) 3 Behind Three Way Catalytic Converter (TWC) G287 with oxygen sensor heater

1. Exhaust bank 3 (cylinder 7, 8, 9)

4.1 - Heated Oxygen Sensor (HO2S) 4 G286 with oxygen sensor heater; before catalytic converter

1. Exhaust bank 4 (cylinder 10, 11, 12)

4.2 - Oxygen Sensor (O2S) 4 Behind Three Way Catalytic Converter (TWC) G288 with oxygen sensor heater; after catalytic converter

1. Exhaust bank 4 (cylinder 10, 11, 12)

Note. In the following illustration, the component locations of the knock sensors are only shown in schematic form. The knock sensors are located on the outer sides of the crankcase, not in the "V" as e.g. on the bi-turbo engine. The engine is equipped with a total of four knock sensors. Arrow points in direction of travel.

Scheme 959

I - Cylinder bank 1 (cylinders 1 to 6)

II - Cylinder bank 2 (cylinders 7 to 12)

1 - Knock sensor 1 G61

1. Knock sensor 1 detects engine knocks in cylinders 1, 2 and 3.

2 - Knock sensor 2 G66

1. Knock sensor 2 detects engine knocks in cylinders 4, 5 and 6.

3 - Knock sensor 3 G198

1. Knock sensor 3 detects engine knocks in cylinders 7, 8 and 9.

4 - Knock sensor 4 G199

1. Knock sensor 4 detects engine knocks in cylinders 10, 11 and 12.

Intake Manifold, Disassembling and Assembling

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Scheme 960

1 - Intake manifold upper part

2 - Vacuum connection

1. Only on upper section of intake manifold, left side

3 - Vacuum connection

1. Only on upper section of intake manifold, left side
2. Evaporative Emission (EVAP) Canister Purge Regulator Valve 2 N333

4 - Gasket

1. Replace

5 - From brake booster

1. Ensure seated tightly

6 - 8 Nm

7 - Throttle valve control module*

1. Sensor contacts and connector contacts gold plated
2. 6pin connector
3. Checking --> «Throttle Valve Control Modules, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__throttle-valve-control-modules-checking)

Cylinder bank 1

1. Throttle valve control module J338

Cylinder bank 2

1. Throttle valve control module 2 J544

8 - Vent line

1. Only on side section of intake manifold, left side
2. Ensure seated tightly
3. From fuel system Leak Detection Pump (LDP) V144

9 - Pressure regulator valve for crankshaft housing ventilation

10 - 20 Nm

11 - O-ring

1. Replace
2. Before installing, moisten with clean engine oil

12 - Gasket

1. Replace if damaged

13 - Intake manifold lower part

14 - Fuel distributor with fuel injectors

1. Disassembling and assembling --> «Fuel Rail with Injectors, Disassembling and Assembling»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__fuel-rail-with-injectors-disassembling-and)

15 - 8 Nm

16 - Intake manifold side-part

17 - Threaded plate

18 - 7 Nm plus an additional 1 / 2 turn (180)

Fuel Rail with Injectors, Disassembling and Assembling

1. Remove intake manifold upper part (along with both intake manifold side parts) --> «Intake Manifold, Disassembling and Assembling»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__intake-manifold-disassembling-and-assembling) .

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Scheme 961

1 - Fuel rail with fuel injectors and supply line connection

1. Secure line with spring clamps
2. Ensure seated tightly
3. From fuel filter on tank

2 - Retaining clip

1. Check for secure seat

3 - Fuel injectors 1 through 12*

1. Checking --> «Fuel Injectors, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__fuel-injectors-checking)

Cylinder bank 1

1. Fuel injector 1 to 6 (N30 to N33, N83 and N84)

Cylinder bank 2

1. Fuel injectors 7 to 12 (N85 , N86 and N299 to N302)

4 - O-ring

1. Replace
2. Before installing, moisten with clean engine oil

Engine Components, Checking

> Oxygen Sensor Heaters Before Catalytic Converter, Checking

> Oxygen Sensor Heaters After Catalytic Converter, Checking

> Mass Air Flow Sensor, Checking

> Throttle Valve Control Modules, Checking

> Coolant Temperature Sensor, Checking

> Intake Air Temperature Sensor, Checking

> Engine Speed Sensor, Checking

> Engine Coolant Temperature Sensor on Radiator, Checking

> MAP Controlled Thermostat, Checking

> Coolant Fan Control Modules, Checking

> Fuel Injectors, Checking

> Fuel Injectors, Checking Injection Quantity and Seal

> Fuel Pressure Regulator and Residual Pressure, Checking

> Intake System, Checking for Leaks

Oxygen Sensor Heaters Before Catalytic Converter, Checking

Note. When servicing terminals in harness connector of oxygen sensors, use only gold-plated terminals.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay 2 J670 must be OK, checking: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Battery voltage (both batteries) must be at least 11.5 Volts.
3. All electrical consumers such as, lights and rear window defroster must be switched off.
4. For vehicles with automatic transmission, selector lever must be in "P".

1. Parking brake must be engaged.
2. The Ground (GND) connections between engine and body must be OK.
3. Ignition switched off.
4. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Voltage Supply and Wiring to Control Module, Checking

Test sequence

1. Disconnect corresponding 6-pin harness connector to oxygen sensor to be tested: Component location

Scheme 962

1. Connect multimeter to terminals 3 +4 of connector to Engine Control Module (ECM) for voltage measurement.
2. Start engine and run at idle speed. Specification: at least 7.0 V

If specification is obtained

1. Switch ignition off.
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is not obtained

Scheme 963

1. Connect multimeter to terminal 3 of connector to Engine Control Module (ECM) + Ground (GND) for voltage measurement. Specification: at least 11.0 V
2. Switch ignition off.

If specification is not obtained

1. Check voltage supply at 6-pin connector terminal 3 to Motronic Engine Control Module (ECM) Power Supply Relay 2 J670 according to wiring diagram: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Check Ground (GND) activation of respective oxygen sensor heater.

Oxygen Sensor Heating Ground Activation, Checking

Test sequence

1. Disconnect corresponding 6-pin harness connector to oxygen sensor to be tested: Component location

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

1. Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

1. Check wires for short circuit to B+ and Ground (GND). Specification: infinity ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring replace the engine control module. Refer to --> Engine Control Modules, Replacing .

Oxygen Sensor Heaters After Catalytic Converter, Checking

Note. When servicing terminals 3 and 4 in harness connector of oxygen sensors, use only gold-plated terminals.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay 2 J670 -position 5- must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Battery voltage (both batteries) must be at least 11.5 Volts.
3. All electrical consumers such as, lights and rear window defroster must be switched off.
4. For vehicles with automatic transmission, selector lever must be in "P".

1. Parking brake must be engaged.
2. The Ground (GND) connections between engine and body must be OK.
3. Ignition switched off.
4. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Voltage Supply and Wiring to Control Module, Checking

Test sequence

1. Disconnect corresponding 6-pin harness connector to oxygen sensor to be tested: Component location

Scheme 964

1. Connect multimeter to terminals 1 + 2 of connector to Engine Control Module (ECM) for voltage measurement.
2. Start engine and run at idle speed. Specification: at least 7.0 V

If specification is obtained

1. Switch ignition off.
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is not obtained

Scheme 965

1. Connect multimeter to terminal 1 of connector to Engine Control Module (ECM) + Ground (GND) for voltage measurement. Specification: at least 11.0 V
2. Switch ignition off.

If specification is not obtained

1. Check voltage supply at 4-pin connector terminal 1 to Motronic Engine Control Module (ECM) Power Supply Relay 2 J670 according to wiring diagram: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Check Ground (GND) activation of the respective oxygen sensor heater.

Oxygen Sensor Heating Ground Activation, Checking

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

Scheme 966

1. Check wires between test box and 4-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

1. Check wires for short circuit to B+ and Ground (GND). Specification: infinity ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring, replace the engine control module. Refer to --> Engine Control Modules, Replacing .

Mass Air Flow Sensor, Checking

Note. Use only gold-plated terminals when servicing terminals in harness connector of Mass Air Flow (MAF) sensors.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay J271 -position 4- must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Battery voltage (both batteries) must be at least 11.5 Volts.
3. All electrical consumers such as, lights and rear window defroster must be switched off.
4. For vehicles with automatic transmission, selector lever must be in "P".

1. Parking brake must be engaged.
2. The Ground (GND) connections between engine and body must be OK.
3. Coolant temperature must be at least 80 C --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.
4. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Function Test

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Start engine and let run at idle.
3. Under address word 33, select "Diagnostic mode 1: Check measured values".
4. Select measured value "PID 16: Air flow quantity at mass air flow sensor".

1. Check specified value of air flow quantity at Mass Air Flow (MAF) Sensor at idle

1. End diagnosis and switch ignition off.

If specified value is obtained, but DTC memory has a DTC concerning Mass Air Flow (MAF) Sensor G70

1. Check Mass Air Flow (MAF) Sensor G70 voltage supply.

If specification is not obtained

1. Check signal and Ground (GND) wires of Mass Air Flow (MAF) Sensor G70.

Voltage Supply of Mass Air Flow Sensors, Checking

1. Disconnect corresponding 5-pin connector from Mass Air Flow (MAF) Sensor G70 to be tested

Scheme 967

1. 5-pin connector - arrow - from Mass Air Flow (MAF) Sensor G70 with cylinder bank 1 Intake Air Temperature (IAT) Sensor G42.

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Mass Air Flow (MAF) sensor G70 with cylinder bank 1 Intake Air Temperature (IAT) Sensor G42 is located left in direction of travel.

Scheme 968

1. 5-pin connector - 1 - from Mass Air Flow (MAF) sensor 2 G246 with cylinder bank 2 Intake Air Temperature (IAT) Sensor 2 G299.

Note. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel. Mass Air Flow (MAF) sensor 2 G246 with cylinder bank 2 Intake Air Temperature (IAT) Sensor 2 G299 is located at right in direction of travel.

1. Connect multimeter to terminal 2 of 5-pin connector and engine Ground (GND) for voltage measurement.
2. Start engine and run at idle speed. Specification: at least 11.0 V
3. Switch ignition off.

If no voltage is present

1. Check wire between 5-pin connector terminal 2 and Motronic Engine Control Module (ECM) Power Supply Relay J271 for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If voltage supply and wiring are OK

1. Connect multimeter to terminal 4 of 5-pin connector and engine Ground (GND) for voltage measurement.
2. Switch ignition on. Specification: at least 4.5 V
3. Switch ignition off.

If no voltage is present

1. Check signal and Ground (GND) wires of Mass Air Flow (MAF) sensor.

Checking Signal and Ground Wires of Mass Air Flow Sensors

1. Disconnect corresponding 5-pin connector from Mass Air Flow (MAF) sensor G70 to be tested

1. 5-pin connector - arrow - from Mass Air Flow (MAF) sensor G70 with cylinder bank 1 Intake Air Temperature (IAT) Sensor G42.

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Mass Air Flow (MAF) sensor G70 with cylinder bank 1 Intake Air Temperature (IAT) Sensor G42 is located left in direction of travel.

1. 5-pin connector - 1 - from M ass Air Flow (MAF) sensor 2 G246 with cylinder bank 2 Intake Air Temperature (IAT) Sensor 2 G299.

Note. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel. Mass Air Flow (MAF) sensor 2 G246 with cylinder bank 2 Intake Air Temperature (IAT) Sensor 2 G299 is located at right in direction of travel.

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

1. Check wires between test box and 5-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
2. Terminal 3 + socket 27
3. Terminal 4 + socket 53
4. Terminal 5 + socket 29

1. Wiring resistance: max. 1.5 ohms
2. Check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specification: infinity ohms
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring

1. Replace corresponding Mass Air Flow (MAF) sensor with Intake Air Temperature (IAT) sensor.
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Throttle Valve Control Modules, Checking

Note. Use only gold-plated terminals when servicing terminals in harness connector of throttle valve control modules.

Function

The throttle valve activation occurs via an electric motor (throttle drive) in throttle valve control modules. This is operated by ECM according to specifications from two gas pedal position sensors.

Throttle Valve Control Module - 1 - J338 components

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

Throttle Valve Control Module 2 J544 - 4 - components

1. Throttle Drive 2 G296
2. Throttle Drive Angle Sensor 2 (for Electronic Power Control (EPC)) G297
3. Throttle Drive Angle Sensor 2 (for Electronic Power Control (EPC)) G298

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test conditions

1. Battery voltage (both batteries) must be at least 11.5 Volts.
2. All electrical consumers such as, lights and rear window defroster must be switched off.
3. For vehicles with automatic transmission, selector lever must be in "P".
4. Parking brake must be engaged.

1. The Ground (GND) connections between engine and body must be OK.
2. Throttle valve not damaged or contaminated
3. Coolant temperature must be at least 20 C --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.
4. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Function Test

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Switch ignition on.
3. Under address word 33, select "Diagnostic mode 1: Check measured values".
4. Select measured value "PID 17: Throttle valve position (absolute)".

1. Check specified value of throttle valve position (absolute) at idle stop

1. Slowly depress accelerator pedal up to Wide Open Throttle (WOT) stop while observing the percentage display. The percentage display must increase uniformly.
2. Check specified value of throttle valve position (absolute) at Wide Open Throttle (WOT) stop

1. End diagnosis and switch ignition off.

If specifications are not obtained

1. Disconnect corresponding 6-pin connector from throttle valve control module to be tested

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Throttle Valve Control Module J338 of cylinder bank 1 is located at left in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel. Throttle Valve Control Module 2 J544 of cylinder bank 2 is located at right in direction of travel.

Check Resistance

Scheme 969

1. Check resistance of throttle valve drive in throttle valve control unit between terminals 3 + 5, specified value: 1.0 to 5.0 ohms

If specification is not obtained

1. Replace corresponding throttle valve control module
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Check voltage supply of throttle valve control modules and wiring to control module.
2. Check Throttle Position (TP) sensor --> «Electronic Power Control Components, Servicing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__electronic-power-control-components-servicing) .

If no malfunction is detected in the voltage supply or wiring, replace the engine control module. Refer to --> Engine Control Modules, Replacing .

Voltage Supply and Wiring to Control Module, Checking

Scheme 970

1. Connect multimeter to terminals 2 + 6 of connector for voltage measurement.
2. Switch ignition on. Specification: at least 4.5 V
3. Switch ignition off.

If no voltage is present

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

Scheme 971

1. Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram: Terminal 1+Socket 92, Terminal 2+Socket 83, Terminal 3+Socket 117, Terminal 4+Socket 84, Terminal 5+Socket 118, Terminal 6+Socket 91, wire resistance: max. 1.5 ohms
2. Check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specification: infinity ohms
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no fault is detected in the wiring

1. Check voltage supply of Engine Control Module (ECM) according to wiring diagram: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Coolant Temperature Sensor, Checking

Note. Use only gold-plated terminals when servicing terminals in harness connector of sensor.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test conditions

1. For vehicles with automatic transmission, selector lever must be in "P".
2. Parking brake must be engaged.
3. The Ground (GND) connections between engine and body must be OK.
4. Engine must be cold.

1. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Function Test

Scheme 972

Component location: Between engine and bulkhead

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Switch ignition on.
3. Under address word 33, select "Diagnostic mode 1: Check measured values".
4. Select measured value "PID 05: Coolant temperature".

1. Check specified value of coolant temperature

If specification is not obtained

1. Perform test according to the following table

1) If a temperature is display that deviates strongly from the sensor ambient temperature, check sensor wires for contact resistance.

If specification is obtained

1. Start engine and run at idle speed. The temperature value must increase steadily

Note. The temperature increases in increments of 1.0 C If the engine shows problems in certain temperature ranges and the temperature does not climb uniformly, the temperature signal is intermittent and the sensor must be replaced.

1. End diagnosis and switch ignition off.

Continuation of Test If Indication is Approx. -40 C

1. Remove 2-pin connector - 3 - from Engine Coolant Temperature (ECT) Sensor G62.

Engine Coolant Temperature (ECT) Sensor

Scheme 973

1. Bridge terminals 1 + 2 of connector using respective adapter cables and observe the indication on display.

If indication jumps to approx 140 C

1. End diagnosis and switch ignition off.
2. Replace Engine Coolant Temperature (ECT) Sensor G62.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If indication remains at approx -40 C

1. End diagnosis and switch ignition off.
2. Check wires to control module according to wiring diagram.

Continuation of Test If Indication is Approx. 140 C

1. Remove 2-pin connector - 3 - from Engine Coolant Temperature (ECT) Sensor G62.

If indication jumps to approx -40 C

1. End diagnosis and switch ignition off.
2. Replace Engine Coolant Temperature (ECT) Sensor G62.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If indication remains at approx 140 C

1. End diagnosis and switch ignition off.
2. Check wires to control module according to wiring diagram.

Check Wires to Control Module

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

1. Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Terminal 1+Socket 93, Terminal 2+Socket 108, wire resistance: max. 1.5 ohms
2. Check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specification: infinity ohms
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring

Scheme 974

1. Measure resistance at Engine Coolant Temperature (ECT) Sensor G62.

Scheme 975

Range A displays resistance values for the temperature range of 0 to 50 C, range B displays resistance values for the temperature range of 50 to 100 C.

Example

1. 30 C is in range A and corresponds to a resistance of 1.5 to 2.0 kohms
2. 80 C is in range B and corresponds to a resistance of 275 to 375ohms

If specification is not obtained

1. Replace Engine Coolant Temperature (ECT) Sensor G62.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunctions are detected in the wires and the resistance values are OK

If no malfunction is detected in the wiring, replace the engine control module. Refer to --> Engine Control Modules, Replacing .

Intake Air Temperature Sensor, Checking

Note. Use only gold-plated terminals when servicing terminals in harness connector of Mass Air Flow (MAF) sensor or Intake Air Temperature (IAT) sensor.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram
4. Chilling spray (commercially available)

Test conditions

1. The fuses must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. For vehicles with automatic transmission, selector lever must be in "P".
3. Parking brake must be engaged.
4. The Ground (GND) connections between engine and body must be OK.

Function Test

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Switch ignition on.
3. Under address word 33, select "Diagnostic mode 1: Check measured values".
4. Select measured value "PID 15: Intake air temperature".

1. Check specified value of intake air temperature

If specification is not obtained

1. Perform test according to the following table

1) If a temperature is indicated that is below the sensors ambient temperature, first check sensor wires for contact resistance. Note that while the vehicle is standing still the sensor might warm up due to radiant heat.

If specification is obtained

1. Remove corresponding intake manifold between Mass Air Flow (MAF) sensor and throttle valve control module --> «Intake Manifold, Disassembling and Assembling»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__intake-manifold-disassembling-and-assembling) .
2. Remember intake air temperature value.

Scheme 976

1. Spray corresponding sensor - arrow - with commercially available chilling spray and watch temperature value. Temperature value must decrease.
2. End diagnosis and switch ignition off.

If intake air temperature does not drop

1. Replace corresponding Mass Air Flow (MAF) sensor with Intake Air Temperature (IAT) sensor.

Note. Intake Air Temperature (IAT) sensors are components of Mass Air Flow (MAF) sensor and cannot be replaced individually.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Continuation of Test If Indication is Approx. -40 C

1. Disconnect corresponding 5-pin connector from Mass Air Flow (MAF) sensor with Intake Air Temperature (IAT) sensor to be tested.

1. 5-pin connector - arrow - from Mass Air Flow (MAF) sensor G70 with cylinder bank 1 Intake Air Temperature (IAT) Sensor G42.

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Mass Air Flow (MAF) sensor G70 with cylinder bank 1 Intake Air Temperature (IAT) Sensor G42 is located left in direction of travel.

1. 5-pin connector - 1 - from Mass Air Flow (MAF) sensor 2 G246 with cylinder bank 2 Intake Air Temperature (IAT) Sensor 2 G299.

Note. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel. Mass Air Flow (MAF) sensor 2 G246 with cylinder bank 2 Intake Air Temperature (IAT) Sensor 2 G299 is located at right in direction of travel.

Scheme 977

1. Bridge terminals 1 + 3 of connector using respective adapter cables while observing the indication on display.

If indication jumps to approx 140 C

1. End diagnosis and switch ignition off.
2. Replace corresponding Mass Air Flow (MAF) sensor with Intake Air Temperature (IAT) sensor --> «Component Locations»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__component-locations) .

Note. Intake Air Temperature (IAT) sensors are components of Mass Air Flow (MAF) sensor and cannot be replaced individually.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If indication remains at approx -40 C

1. End diagnosis and switch ignition off.
2. Check wires to control module according to wiring diagram.

Continuation of Test If Indication is Approx. 140 C

1. Disconnect corresponding 5-pin connector from Mass Air Flow (MAF) sensor with Intake Air Temperature (IAT) sensor to be tested.

1. 5-pin connector - arrow - from M ass Air Flow (MAF) sensor G70 with cylinder bank 1 Intake Air Temperature (IAT) Sensor G42.

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Mass Air Flow (MAF) sensor G70 with cylinder bank 1 Intake Air Temperature (IAT) Sensor G42 is located left in direction of travel.

1. 5-pin connector - 1l - from Mass Air Flow (MAF) sensor 2 G246 with cylinder bank 2 Intake Air Temperature (IAT) Sensor 2 G299.

Note. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel. Mass Air Flow (MAF) sensor 2 G246 with cylinder bank 2 Intake Air Temperature (IAT) Sensor 2 G299 is located at right in direction of travel.

If indication jumps to approx -40 C

1. End diagnosis and switch ignition off.
2. Replace corresponding Mass Air Flow (MAF) sensor with Intake Air Temperature (IAT) sensor --> «Component Locations»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__component-locations)

Note. Intake Air Temperature (IAT) sensors are components of Mass Air Flow (MAF) sensor and cannot be replaced individually.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If indication remains at approx 140 C

1. End diagnosis and switch ignition off.
2. Check wires to control module according to wiring diagram.

Check Wires to Control Module

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

1. Check wires between test box and 5-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Terminal 1+Socket 26, Terminal 3+Socket 27, wire resistance: max. 1.5 ohms
2. Check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specification: infinity ohms
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring

1. Measure resistance at Intake Air Temperature (IAT) sensor terminals 1 (signal) and 3 (Ground (GND)).

Range A displays resistance values for the temperature range of 0 to 50 C, range B displays resistance values for the temperature range of 50 to 100 C.

Example

1. 30 C is in range A and corresponds to a resistance of 1.5 to 2.0 kohms
2. 80 C is in range B and corresponds to a resistance of 275 to 375ohms

If specification is not obtained

1. Replace corresponding Mass Air Flow (MAF) sensor with Intake Air Temperature (IAT) sensor --> «Component Locations»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__component-locations) .

Note. Intake Air Temperature (IAT) sensors are components of Mass Air Flow (MAF) sensor and cannot be replaced individually.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring, replace the engine control module. Refer to --> Engine Control Modules, Replacing .

Engine Speed Sensor, Checking

Function

The Engine Speed (RPM) Sensor G28 detects engine speed and reference marks. The engine will not start if there is no engine speed signal. If the engine is running and the engine speed signal stops, the engine will stop immediately.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test conditions

1. Battery voltage (both batteries) must be at least 11.5 Volts.
2. All electrical consumers such as, lights and rear window defroster must be switched off.
3. For vehicles with automatic transmission, selector lever must be in "P".
4. Parking brake must be engaged.

1. The Ground (GND) connections between engine and body must be OK.
2. Ignition switched off.
3. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

Scheme 978

1. Disconnect 3-pin connector - arrow - to Engine Speed (RPM) Sensor G28.

Checking Voltage Supply

Scheme 979

1. Connect multimeter between terminal 1 (B+) and 3 (Ground (GND)) (connector to ECM) for voltage measurement.
2. Switch ignition on. Specification: at least 4.5 V
3. Switch ignition off.

If no voltage is present

1. Check wires to control module according to wiring diagram.

Check Wires to Control Module

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Scheme 980

1. Check wires between test box and 3-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Terminal 1+Socket 98, Terminal 2+Socket 82, Terminal 3+Socket 90, wire resistance: max. 1.5 ohms
2. Check wires for short circuit to each other. Specification: infinity ohms
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is found in the wires and there was voltage between terminals 1 + 3

1. Remove sensor and check sensor wheel for secure fit, damage and run-out.

Note. There is a larger gap on sensor wheel. This gap is a reference mark and not damage.

If no malfunction can be detected at sensor wheel

1. Replace Engine Speed (RPM) Sensor G28.
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is found in the wires and there was no voltage between terminals 1 + 3

If no malfunction is detected in the wiring, replace the engine control module. Refer to --> Engine Control Modules, Replacing .

Engine Coolant Temperature Sensor on Radiator, Checking

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test conditions

1. The Ground (GND) connections between engine and body must be OK.
2. Ignition switched off.
3. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

1. Remove 2-pin connector from Engine Coolant Temperature (ECT) Sensor (on Radiator) G83.

Check resistance

1. Measure resistance at Engine Coolant Temperature (ECT) Sensor (on Radiator) G83.

Range A displays resistance values for the temperature range of 0 to 50 C, range B displays resistance values for the temperature range of 50 to 100 C.

Example

1. 30 C is in range A and corresponds to a resistance of 1.5 to 2.0 kohms
2. 80 C is in range B and corresponds to a resistance of 275 to 375ohms

If specification is not obtained

1. Replace Engine Coolant Temperature (ECT) Sensor (on Radiator) G83.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Check wires to control module according to wiring diagram --> «Check wires to control module»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

1. Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Terminal 1+Socket 17, Terminal 2+Socket 50, wire resistance: max. 1.5 ohms
2. Check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specification: infinity ohms
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunctions are detected in the wires and the resistance values are OK

If no malfunction is detected in the wiring, replace the engine control module. Refer to --> Engine Control Modules, Replacing .

MAP Controlled Thermostat, Checking

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test conditions

1. The Ground (GND) connections between engine and body must be OK.
2. Ignition switched off.

Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

1. Remove intake manifold upper part (along with both intake manifold side parts) --> «Intake Manifold, Disassembling and Assembling»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__intake-manifold-disassembling-and-assembling) .

Note. Seal the intake channels in cylinder head using a clean rag.

Scheme 981

1. Remove 2-pin connector from Map Controlled Engine Cooling Thermostat F265 - 2 -.

Check resistance

1. Check resistance between terminals of thermostat. Specification: 14.0 to 18.0 ohms

If specification is not obtained

1. Replace Map Controlled Engine Cooling Thermostat F265 : --> «19 - COOLING SYSTEM»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-engine-mechanical-engine-codes-bsb)
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Check wires to control module according to wiring diagram --> «Check wires to control module»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

1. Check wire between test box socket 116 + terminal 2 of 2-pin connector for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
2. Check the wire for short circuit to B+ and Ground (GND). Specification: infinity ohms
3. Check wire between 1-pin connector terminal 2 and Motronic Engine Control Module (ECM) Power Supply Relay J271 for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
4. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.

1. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunctions are detected in the wires and the resistance value is OK

If no malfunction is detected in the wiring, replace the engine control module. Refer to --> Engine Control Modules, Replacing .

Intake System, Checking for Leaks

Checking With Engine Leak Detection Spray

Special tools, testers and auxiliary items required

1. Engine leak detection spray G 001 800 A1

Test conditions

1. Parking brake must be engaged.
2. For vehicles with automatic transmission, selector lever must be in "P" .
3. Coolant temperature must be at least 80 degree C «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.

Test sequence

Note. The negative pressure in the intake system sucks in the leak detection spray with the false air. Leak detection spray decreases ignition quality of the fuel mixture. This leads to a decrease in engine speed and a change in oxygen sensor values. The safety precautions listed on the can must be observed.

1. Connect diagnostic tester.
2. Start engine and let run at idle.
3. Under address word 33, select "Diagnostic mode 1: Check measured values" .
4. Select the following measured values: PID 06: Short time gasoline-air ratio bank 1/3 PID 08: Short time gasoline-air ratio bank 2/4 PID 12: Engine rotations per minute (RPM)

Note. Bank 1 and 2 = exhaust bank 1 and 2 (with module number "10 - Engine electronics"). Bank 3 and 4 = exhaust bank 3 and 4 (with module number "11 - Engine electronics II").

1. Observe short-term gasoline-air ratio as well as engine speed.
2. Systematically spray components of intake system with engine leak detection spray.

If engine speed drops or if the short-term gasoline-air ratio changes

1. End diagnosis and switch ignition off.
2. Check sprayed part of intake system for leaks, and repair the malfunction.
3. Erase DTC memory of Engine Control Module --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Coolant Fan Control Modules, Checking

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test conditions

1. Battery voltage (both batteries) must be at least 11.5 Volts.
2. All electrical consumers such as, lights and rear window defroster must be switched off.
3. For vehicles with automatic transmission, selector lever must be in "P".
4. Parking brake must be engaged.

1. The Ground (GND) connections between engine and body must be OK.
2. Ignition switched off.
3. Motronic Engine Control Module (ECM) Power Supply Relay 2 J670 must be OK, checking: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
4. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

1. Disconnect corresponding 4-pin harness connector from Coolant Fan Control (FC) Control Module J293

Scheme 982

1. 4-pin connector - arrow - from Coolant Fan Control (FC) Control Module J293

Scheme 983

1. 4-pin connector from Coolant Fan Control (FC) Control Module 2 J671

Checking voltage supply

Scheme 984

1. Connect multimeter to terminals 1 + 4 and 2 + 4 of connector to Engine Control Module (ECM) for voltage measurement.
2. Switch ignition on. Specification: at least 10.0 V
3. Switch ignition off.

If no voltage is present

1. Check wiring between 4-pin connector (terminals 1 and 2) and corresponding fuses in right instrument panel fuse holder for short circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

Right instrument panel fuse holder

1. Check for open circuit in wire between 4-pin connector terminal 4 and Ground (GND) according to wiring diagram. Wiring resistance: max. 1.5 ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If there is no malfunction in the voltage supply

1. Check wire to Engine Control Module (ECM) according to wiring diagram.

Checking wire to Engine Control Module (ECM)

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

1. Check wire between test box and 4-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

1. Check wire for short circuit to vehicle Ground (GND) and to B+. Specification: infinity ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is found in the wire and there was voltage between terminals 1 + 4 and 2 + 4

Scheme 985

1. Replace corresponding Coolant Fan Control (FC) Control Module

1. Coolant Fan Control (FC) Control Module 2 J293 - 5 - with Coolant Fan V7 - 4
2. Coolant Fan Control (FC) Control Module 2 J671 - 1 - with Coolant Fan 2 V177 - 2

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Fuel Injectors, Checking

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Voltage tester V.A.G 1527
3. Test adapter kit V.A.G 1594
4. Wiring diagram

Test conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay J271 -position 4- must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Electrical fuel pump relays must be OK --> Electrical Wiring Diagrams, Troubleshooting and Component Locations.
3. Battery voltage (both batteries) must be at least 11.5 Volts.
4. All electrical consumers such as, lights and rear window defroster must be switched off.

1. For vehicles with automatic transmission, selector lever must be in "P".
2. Parking brake must be engaged.
3. The Ground (GND) connections between engine and body must be OK.
4. Engine Speed (RPM) Sensor must be OK, checking --> «Engine Speed Sensor, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__engine-speed-sensor-checking) .

1. Ignition switched off.
2. Fuse -29- for fuel injectors 1 to 12 in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

1. Remove intake manifold upper part (along with both intake manifold side parts) --> «Intake Manifold, Disassembling and Assembling»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__intake-manifold-disassembling-and-assembling) .

Scheme 986

1. Remove connector for fuel injectors 1 to 12 (N30, N33, N83, N86, N299, N302).

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Resistance values of fuel injectors, checking

1. Test resistance of fuel injectors between terminals. Specification: 14.0 to 16.0 ohms

If specification is not attained

1. Replace faulty fuel injector.

When installing fuel injector, observe the following

1. Replace O-rings on all injectors and lightly moisten with clean engine oil.
2. Insert fuel injectors into fuel rail perpendicular and in correct position, and secure them with retaining clips.
3. Position fuel rail with secured fuel injectors on intake manifold and apply uniform pressure to press it in.
4. The connectors must audibly engage in the injectors when pushed on.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Checking voltage supply

Scheme 987

1. Connect diode test lamp to connector of fuel injector to be tested terminal 1 + Ground (GND).
2. Operate starter and check voltage supply for fuel injectors. LED must light up
3. Switch ignition off.

If LED does not light up

1. Check wire between 2-pin connector terminal 1 and corresponding fuse in E-Box (in plenum chamber, right side) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Actuation and voltage supply, checking

1. Connect diode test lamp to connector terminals 1 + 2 of fuel injector to be checked.
2. Operate starter and test activation of corresponding Engine Control Module (ECM) for fuel injector. LED must flicker
3. Switch ignition off.

If LED does not flicker

1. Check wires to Engine Control Module (ECM) according to wiring diagram --> «Checking wires to Engine Control Module (ECM)»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__checking-wires-to-engine-control-module) .

Checking wires to Engine Control Module (ECM)

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

1. Check wires between test box and 2-pin connector for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

Cylinder bank 1

Cylinder bank 2

Cylinder bank 1 and 2

1. Check wires for short circuit to B+ and Ground (GND). Specification: infinity ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring, replace the engine control module. Refer to --> Engine Control Modules, Replacing .

Fuel Injectors, Checking Injection Quantity and Seal

Special tools, testers and auxiliary items required

Scheme 988

1. Torque wrench V.A.G 1331 (5 to 50 Nm)
2. Remote control V.A.G 1348/3A with adapter cable V.A.G 1348/3-2
3. Test adapter kit V.A.G 1594 A
4. Injection Rate Tester VAG1602

Test conditions

1. Fuel pressure must be OK, check --> «Fuel Pressure Regulator and Residual Pressure, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__fuel-pressure-regulator-and-residual-pressure) , fuel pressure regulator and retaining pressure, checking.
2. Ignition switched off.

> Safety Precautions .

> Clean Working Conditions .

Test Sequence

1. Remove intake manifold upper part (along with both intake manifold side parts) --> «Intake Manifold, Disassembling and Assembling»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__intake-manifold-disassembling-and-assembling) .

1. Disconnect harness connectors of fuel injectors 1 to 12 (N30 to N33, N83 to N86, N299 to N302).

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

1. Remove fuel rail completely along with fuel injectors (fuel lines remain connected) --> «Fuel Rail with Injectors, Disassembling and Assembling»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__fuel-rail-with-injectors-disassembling-and) , fuel rail with fuel injectors, disassembling and assembling.
2. Connect test box to Engine Control Module (ECM) 2 J623 wiring harness on connecting test box for wiring test.

Checking for leaks.

Checking injection quantity.

Checking for Leaks

1. Bridge sockets 1 + 65 of test box with respective adapter cables. Fuel Pump (FP) G23 must run.

Note. This work step allows the fuel pump to run when the engine is not running.

1. Switch ignition on.
2. Check injectors for leaks (visual inspection). Only 1 to 2 drops per minute may emit from each valve when fuel pump is running.
3. Disconnect connection between test box sockets.
4. Switch ignition off.

If fuel loss is greater

1. Replace faulty fuel injector.

When installing fuel injector, observe the following

1. Replace O-rings on all injectors and lightly moisten with clean engine oil.
2. Insert fuel injectors into fuel rail perpendicular and in correct position, and secure them with retaining clips.
3. Position fuel rail with secured fuel injectors on intake manifold and apply uniform pressure to press it in.
4. The connectors must audibly engage in the injectors when pushed on.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Injection Quantity, Checking

Scheme 989

1. Insert a fuel injector to be tested into a measuring tube of VAG 1602 tester for fuel injection quantity.
2. Using adapter cables, connect one terminal of fuel injector to be checked to engine Ground (GND).

Scheme 990

1. Connect second fuel injector terminal with adapter cable to remote control (V.A.G. 1348/3A with adapter cable V.A.G 1348/3-2).
2. Connect alligator clip of remote control to positive terminal in engine compartment.
3. Bridge sockets 1 + 65 of test box with respective adapter cables. Fuel Pump (FP) G23 must run.

Note. This work step allows the fuel pump to run when the engine is not running.

1. Switch ignition on.
2. Operate remote control for 30 seconds.
3. Repeat check on other injectors. To do this use new measuring beakers.
4. Disconnect connection between test box sockets.

1. Switch ignition off.
2. After all injectors have been activated, place measuring glasses on a horizontal surface and compare the injected quantity. Specification: 128 to 140 ml per injector

If the tested value of one or more fuel injectors is below or above the indicated specified value

1. Replace faulty fuel injector.

When installing fuel injector, observe the following

1. Replace O-rings on all injectors and lightly moisten with clean engine oil.
2. Insert fuel injectors into fuel rail perpendicular and in correct position, and secure them with retaining clips.
3. Position fuel rail with secured fuel injectors on intake manifold and apply uniform pressure to press it in.
4. The connectors must audibly engage in the injectors when pushed on.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Fuel Pressure Regulator and Residual Pressure, Checking

1. Work on the fuel system must only be performed when engine is cold!
2. Fuel system is under pressure! Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.

Special Tools and Equipment

Scheme 991

1. Fuel Inj. Pressure gauge V.A.G 1318
2. Adapter V.A.G 1318/26

Test Conditions

1. Fuel pump relay OK --> «Electric fuel pump II relay»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) and «Fuel Pump (FP) Relay J17»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
2. Fuel Pump (FP) OK.
3. Fuel filter OK.
4. Battery voltage at least 11 Volts.
5. Parking brake engaged.
6. Vehicles with automatic transmission: Selector lever in position "P" or "N".
7. Electrical consumers switched off (Radiator fan must not run during test).
8. A/C system switched off.
9. Ignition switched off.
10. Safety precautions --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
11. Rules for cleanliness --> «Clean Working Conditions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__clean-working-conditions) .

System Pressure, Checking

1. Remove engine cover.
2. Briefly open fuel filler cap (pressure release).

1. Open fuel supply line and absorb exiting fuel using a rag.

Scheme 992

1. Connect Fuel Inj. Pressure gauge V.A.G 1318 to fuel supply line.
2. Open shut-off tap on pressure gauge. The lever points in direction of flow.
3. Start engine and let run at idle.
4. Measure fuel pressure.

1. Specification: approx. 4.0 bar positive pressure

1. Switch ignition off.
2. Check for leaks and for residual pressure by observing the pressure loss on the pressure gauge

1. After 10 minutes there must be a residual pressure of at least 2.5 bar

The holding pressure drops below 2.5 bar

1. Start engine and let run at idle.

Scheme 993

1. Wait until pressure has built up, then Switch ignition off. At the same time, close Fuel Inj. Pressure gauge V.A.G 1318 cut-off tap (lever at right angle to through-flow direction - arrow -).
2. Observe pressure drop on pressure gauge.

If pressure does not drop

1. Check pressure gauge for leaks.
2. Check line connections and fuel injectors for proper seal.

If pressure drops again

1. Check pressure regulator in fuel filter

1. Check fuel pressure regulator.

Check Fuel Pressure Regulator

Note. Fuel pressure regulator is integrated in fuel filter

1. Remove carpeting in luggage compartment.

1. Unbolt cover for locking flange - arrows - .

Scheme 994

1. Disconnect fuel return line - 1 - (press release button).

Scheme 995

1. Position adapter piece - 2 - adapter V.A.G 1318/26 on fuel return line - 1 - .
2. Disconnect adapter piece with hose clamp 3094 at adapter V.A.G. 1318/26.

1. Start engine and let run at idle.

1. Wait until pressure has built up, then switch ignition off. At the same time, close fuel Inj. Pressure gauge V.A.G 1318 cut-off tap (lever at right angle to through-flow direction - arrow - .
2. Observe pressure drop on pressure gauge.

If pressure drops again, check-valve of fuel pump is leaky.

1. Replace fuel pump.

If pressure does not drop

1. Replace fuel filter with integrated fuel pressure regulator.

Assembly is performed in reverse order of removal. Note the following

Note. Before disconnecting pressure gauge, release fuel pressure by opening shut-off valve. Hold a container under the connection. To avoid damage to the catalytic converter vehicles with engine code BSB may only be started with a cold engine after working on fuel lines or fuel filter. Starting the engine can take up to 15 seconds the first time.

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating)

Functions, Checking

> Oxygen Sensors and Oxygen Sensor Regulation Before Catalytic Converter, Checking

> Oxygen Sensors and Oxygen Sensor Regulation after Catalytic Converter, Checking

Oxygen Sensors and Oxygen Sensor Regulation Before Catalytic Converter, Checking

Note. When servicing terminals in harness connector of oxygen sensors, use only gold-plated terminals. The oxygen sensors before catalytic converter have a constant regulation and can be differentiated from the oxygen sensor behind catalytic converter via a 6-pin connector.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test Conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay 2 J670 -position 5- must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Battery voltage (both batteries) must be at least 11.5 Volts.
3. All electrical consumers such as, lights and rear window defroster must be switched off.
4. For vehicles with automatic transmission, selector lever must be in "P".

1. Parking brake must be engaged.
2. The Ground (GND) connections between engine and body must be OK.
3. Exhaust system must be properly sealed between catalytic converter and cylinder head.
4. Coolant temperature must be at least 80 C --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.

1. Oxygen sensor heaters for oxygen sensors before catalytic converter must be OK, checking --> «Oxygen Sensor Heaters Before Catalytic Converter, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__oxygen-sensor-heaters-before-catalytic-converter) .
2. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Function Test

1. Select the oxygen sensor test results and check whether the specified values are being reached --> «Diagnostic Mode 05 - Read Oxygen Sensor Monitoring Test Results»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-05-read-oxygen) , Diagnostic mode 5: Check oxygen sensor test results.
2. End diagnosis and switch ignition off.

If the specifications are not obtained

1. Check oxygen sensor wires to control module according to wiring diagram.

Checking Oxygen Sensor Wires to Control Module

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) 2 J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

1. Disconnect corresponding 6-pin harness connector to the oxygen sensor to be tested: Component location

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

1. Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

Oxygen sensor connector

1. Check wires for short circuit to B+ and Ground (GND). Specification: infinity ohms

If no malfunction is detected in the wiring

1. Replace respective oxygen sensor
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Oxygen Sensors and Oxygen Sensor Regulation after Catalytic Converter, Checking

Note. When servicing terminals 3 and 4 in harness connector of oxygen sensors, use only gold-plated terminals.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test Conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay J271 -position 4- must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Battery voltage (both batteries) must be at least 11.5 Volts.
3. All electrical consumers such as, lights and rear window defroster must be switched off.
4. For vehicles with automatic transmission, selector lever must be in "P".

1. Parking brake must be engaged.
2. The Ground (GND) connections between engine and body must be OK.
3. Exhaust system must be properly sealed between catalytic converter and cylinder head.
4. Coolant temperature must be at least 80 C --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.

1. Oxygen sensor heaters for oxygen sensors behind catalytic converter must be OK, checking --> «Oxygen Sensor Heaters After Catalytic Converter, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__oxygen-sensor-heaters-after-catalytic-converter) .
2. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Function Test

1. Select oxygen sensor test results and check whether specified values are being reached --> «Diagnostic Mode 05 - Read Oxygen Sensor Monitoring Test Results»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-05-read-oxygen) , Diagnostic mode 5: Check oxygen sensor test results.
2. End diagnosis and switch ignition off.

If specifications are not obtained

1. Check oxygen sensor wires to control module according to wiring diagram --> «Checking oxygen sensor wires to control module»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__checking-oxygen-sensor-wires-to-control) .

Checking oxygen sensor wires to control module

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) 2 J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

1. Disconnect corresponding 6-pin harness connector to oxygen sensor to be tested: Component location

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

1. Check wires between test box and 4-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

1. Check wires for short circuit to B+ and Ground (GND). Specification: infinity ohms

If no malfunction is detected in the wiring

1. Replace respective oxygen sensor
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Engine Control Modules, Replacing

The Engine Control Modules (ECMs) control fuel injection, the throttle valve control modules, oxygen sensor control, ignition, knock sensors, EVAP canister purge regulator valve, engine speed limitation via fuel injectors and fuel pump relay, camshaft adjustment and On Board Diagnostic (OBD).

Work Procedure

Check control module identification of previous Engine Control Module (ECM) as follows

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Switch ignition on.
3. Under address word 33, select "Diagnostic mode 9: Vehicle information".
4. Select vehicle information "Test-ID 04: Calibration identification". Control module identification will be indicated, e.g.: 07C906018AB 5700

1. End diagnosis and switch ignition off.
2. Disengage and disconnect connector from corresponding Engine Control Module (ECM).

Note. Position 1 shows the Master-ECM 1 J248. Position 2 shows the Slave-ECM 2 4. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Special tools, testers and auxiliary items required

1. Heat gun - 1 - (from the wiring harness repair kit VAS 1978)
2. Nozzle attachment - 2 - (also from the wiring harness repair kit VAS 1978)

Scheme 996

1. Small, commercially available locking pliers (vise grips) - 3

1. Remove right cover from plenum chamber.

Note. Both engine control modules are identical. If both engine control modules are removed, they must be marked before removal to prevent them from being interchanged when re-installing. Master-ECM 1: e.g. with a "M" Slave-ECM 2: e.g. with a "S"

Position 1 shows the Master Engine Control Module (ECM) J623.

Scheme 997

Position 2 shows the Slave Engine Control Module (ECM) 2 J624.

Removal is the same for both engine control modules.

Scheme 998

To increase the difficulty with which the ECM connectors can be accessed, the ECM - 1 - is secured in a metal housing - 5 - with retaining tabs - 2 - and shear bolts - 3 - and - 4 -.

The threads of shear bolts - 4 - (that are not screwed into ECM) are coated with a locking compound. For this reason, the threads must be heated with the heat gun to remove both bolts.

The threads of both shear bolts - 3 - , that are screwed into the ECM, are not coated with a locking compound. The threads in the ECM housing must not be heated and do not require to be heated (unintentional heating of the ECM).

Scheme 999

1. Set adjustment on heat gun as shown in the illustration, with temperature potentiometer - 2 - set to maximum heat and two-stage air flow switch - 3 - set to level 3.

Scheme 1000

1. Heat threads of the connector-side shear bolts as shown in the illustration for approx. 25 to 30 seconds.

Scheme 1001

1. Remove shear bolts with locking pliers (see direction of arrow).
2. Both shear bolts that are screwed into the ECM do not require heating to be removed. They can be removed without heat.
3. Disconnect metal retainers from ECM connectors.
4. Remove both bolts from retainers for ECM and pull ECM forward.

1. Disengage connectors from Engine Control Module (ECM) and then disconnect connectors.
2. Remove old ECM and install new ECM.

Installing engine control module (ECM)

Installation is performed in reverse order. Thereafter, the engine control module must be equipped with the protective housing. New shear bolts must be used.

1. Remove old control module and insert the new one.
2. Check whether the new control module identification matches the old control module identification.

Note. To achieve optimal anti-theft protection for the vehicle, an anti-theft immobilizer is installed. The anti-theft immobilizer is a system for enabling and locking the Engine Control Modules (ECMs). So that this system cannot be circumvented, it is necessary to perform adaptation of the anti-theft immobilizer using the Vehicle Diagnostic and Information System VAS 5052 in the On Board Diagnostic (OBD) function. The great availability of equipment options makes it necessary to adapt the Engine Control Modules (ECMs) to the vehicle (e.g. throttle valve control module or cruise control system). This "written" function is not possible with the Generic Scan Tool.

1. Adapting functions and components: --> VAS 5051 Vehicle Diagnostic, Testing and Information System; Guided Fault Finding; Vehicle System Test or VAS 5052; Vehicle Self-Diagnosis
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Additional Signals, Checking

> Speed Signal, Checking

> Terminal Resistance for CAN-Bus, Checking

Speed Signal, Checking

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test Conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay must be OK, checking: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Motronic Engine Control Module (ECM) Power Supply Relay 2 must be OK, checking: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
3. Instrument Cluster Control Module J285 must be OK.
4. Battery voltage (both batteries) must be at least 11.5 Volts.

1. The fuses must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

Function test

Note. To check the speed signal, vehicle must be driven at a speed above 5 km/h.

Observe safety precautions that apply to road tests --> Safety Precautions .

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Start engine and let run at idle.
3. Under address word 33, select "Diagnostic mode 1: Check measured values".
4. Select measured value "PID 13: Vehicle speed".

1. Perform a road test at a speed above 5 km/h and have a second person observe the indication on the display.
2. Check specified value of the vehicle speed

Note. Vehicle speed must not drop to below 5 km/h during test.

1. End road test and switch ignition off.

If no speed is displayed

1. Check Data-Bus wiring according to wiring diagram --> «Checking wiring»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__checking-wiring) .

Checking wiring

1. Connect test box to wiring harness on corresponding Engine Control Module (ECM) at connecting test box for wiring test.
2. Remove instrument cluster: --> «90 - INSTRUMENTS»(/audi/a8/d3-2005-2007/remont/cruise-control-systems/#electrical-equipment)
3. Repair malfunction in CAN-Bus wires between both Engine Control Modules (ECMs) and J285 Instrument Cluster Control Module J285 according to wiring diagram: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
4. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.

1. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Exhaust System Components, Removing and Installing

> Three Way Catalytic Converters, Checking .

Note. All mechanical procedures and exploded view illustrations with torque specifications are described in --> 26 - EXHAUST SYSTEM, EMISSION CONTROLS

Note. After working on the exhaust system ensure that the system has sufficient clearance from the bodywork. Loosen flanges on catalytic converter and realign muffler and exhaust pipes, if necessary --> 26 - EXHAUST SYSTEM, EMISSION CONTROLS . Do not use sealants containing silicone. Traces of silicone components which are sucked into the engine are not burned there, and they damage the oxygen sensors. Replace self-locking nuts and observe torque specifications --> 26 - EXHAUST SYSTEM, EMISSION CONTROLS . Cylinder bank 1

Note. All mechanical procedures and exploded view illustrations with torque specifications are described in --> 26 - EXHAUST SYSTEM, EMISSION CONTROLS Cylinder bank 2.

Note. All mechanical procedures and exploded view illustrations with torque specifications are described in --> 26 - EXHAUST SYSTEM, EMISSION CONTROLS

Catalytic converter with muffler and mounts.

Note. All mechanical procedures and exploded view illustrations with torque specifications are described in --> 26 - EXHAUST SYSTEM, EMISSION CONTROLS

Three Way Catalytic Converters, Checking

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Function Test

1. Select measuring value "Test ID 01: Catalytic converter" and check if specified values are attained --> «Diagnostic Mode 06 - Read Test Results for Specific Diagnostic Functions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-06-read-test) , Diagnostic mode 6: Check test results of components that are not continuously monitored.
2. End diagnosis and switch ignition off.

If specifications are not obtained

1. Replace primary catalytic converter or catalytic converter cylinder bank
2. Removing and installing catalytic converters: --> «26 - EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-engine-mechanical-engine-codes-bsb)
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Secondary Air Injection System

Principle

Due to rich mixture during the cold start phase, the exhaust emissions contain an increased level of unburned hydrocarbons. The secondary air injection (AIR) system improves the secondary oxidation within the catalytic converter, thereby reducing harmful emissions. The heat released by secondary oxidation shortens the start-up time of the catalytic converter considerably, as well as significantly improves emissions quality during the cold-running phase.

Function

Scheme 1002

In the cold-run phase, control modules - 3 - and - 4 - activate secondary air injection (AIR) pumps - 7 - and - 8 - via both secondary air injection (AIR) pump relays - 2 - and - 5 -. The stream of air from the secondary air injection (AIR) pump opens the combination valve and allows air to flow into the exhaust system before the catalytic converter.

Scheme 1003

Note. The Spring Type Clip Pliers VAS 5024 A are recommended for installing spring-type clips. Replace O-rings and gaskets when performing repair work. Vacuum lines and hose connections must not have leaks. Vacuum hoses must not be clogged or kinked. For trouble-free operation of the electrical components a voltage of at least 11.5 V is necessary. Engine Control Modules (ECM) are equipped with On-Board Diagnostics (OBD). Components marked with * are tested via On Board Diagnostic (OBD), Diagnostic mode 3: Check DTC memory. During some checks it is possible that the control module will detect and store a malfunction. Therefore the following work steps must be performed in the mentioned sequence after ending all tests and repairs.

1. Check DTC memory
2. Erase DTC memory --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data
3. For completion, generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Secondary Air Injection (AIR) pump motors, removing and installing.

Relay positions of relays in E-box (in plenum chamber, right) --> Electrical Wiring Diagrams, Troubleshooting and Component Locations.

1. Check Secondary Air Injection (AIR) system for proper seal --> «Secondary Air Injection System»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-system)

Secondary Air Injection, Component Overview

1 - Right combination valve for Secondary Air Injection (AIR)

1. Component location: Right front on engine
2. Checking --> «Secondary Air Injection Combination Valve, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-combination-valve-checking)
3. Removing and installing --> «Secondary Air Injection, Right Combination Valve, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-right-combination-valve)

2 - Secondary air injection (AIR) pump relay J299

1. Component location --> «Relay and Secondary Air Injection pump installation location»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)

3 - Engine control module (ECM) 2 J624

1. Component location: Next to E-Box on right

4 - Engine control module J623

1. Component location: Above E-Box on left

5 - Secondary Air Injection (AIR) Pump Relay 2 J545

1. Component location --> «Relay and Secondary Air Injection pump installation location»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)

6 - Left combination valve for Secondary Air Injection (AIR)

1. Component location: Left front on engine
2. Checking --> «Secondary Air Injection Combination Valve, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-combination-valve-checking)
3. Removing and installing --> «Secondary Air Injection, Left Combination Valve, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-left-combination-valve)

7 - Secondary Air Injection (AIR) Pump Motor 2 V189

1. For cylinder bank 2 (left)
2. Component location --> «Installed location of Secondary Air Injection (AIR) Pump Motor V101 and Secondary Air Injection (AIR) Pump Motor 2 V189»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
3. Removing and installing --> «Secondary Air Injection Pumps, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)

8 - Secondary air injection (AIR) pump motor V101

1. For cylinder bank 1 (right)
2. Component location --> «Installed location of Secondary Air Injection (AIR) Pump Motor V101 and Secondary Air Injection (AIR) Pump Motor 2 V189»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
3. Removing and installing --> «Secondary Air Injection Pumps, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)

Scheme 1004

1. In E-box, plenum chamber.

1 - Secondary air injection (AIR) pump relay J299

2 - Secondary Air Injection (AIR) Pump Relay 2 J545

B - Secondary Air Injection (AIR) Pump Fuse S130 (50A)

C - Secondary Air (AIR) Pump Fuse 2 S284 (50A)

Scheme 1005

1. Front left behind the bumper.

1. Secondary air injection (AIR) pump motor V101
2. Secondary Air Injection (AIR) Pump Motor 2 V189

Secondary Air Injection Combination Valve, Checking

Test sequence

1. Select measuring value "Test ID 03: Secondary Air Injection (AIR) system" and check if specified values are attained --> «Diagnostic Mode 06 - Read Test Results for Specific Diagnostic Functions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-06-read-test) , Diagnostic mode 6: Check test results of components that are not continuously monitored.
2. End diagnosis and switch ignition off.

Scheme 1006

If specifications are not obtained

1. Disconnect pressure hose - 1 - at combination valve for secondary air injection.

Note. Ignore - arrows -.

Connect an appropriate assisting hose to the combination valve.

1. Blow into the assisting hose using light pressure (do not use pressurized air).

1. Combination valve must be closed, it must not be possible to blow through.

1. Blow into the assisting hose using higher pressure (do not use pressurized air).

1. The combination valve must open, it must be possible to blow through.

If switching point is not recognized

1. Replace the combination valve: Left --> «Secondary Air Injection, Left Combination Valve, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-left-combination-valve) , right --> «Secondary Air Injection, Right Combination Valve, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-right-combination-valve) .
2. Repeat function test.
3. Check hoses and hose connections for secure seating.
4. Repeat function test.

If malfunction is no longer present

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Scheme 1007

Removing

1. Activate the vehicle lifting mode --> «43 - SELF LEVELING SUSPENSION»(/audi/a8/d3-2005-2007/remont/axle-shafts/#suspension-wheels-and-steering) .
2. Remove left front wheel.

Note. Secure the brake disc with wheel bolts.

1. For vehicles with auxiliary heater, remove bolts - arrows - for exhaust pipe of parking heater/auxiliary heater on noise insulation.

Scheme 1008

1. Loosen quick-release fasteners - 1 - and remove front noise insulation.
2. Remove front part of the left front wheelhouse liner --> «66 - EXTERIOR EQUIPMENT»(/audi/a8/d3-2005-2007/remont/door-locks-anti-theft-systems/#body-exterior) .

Scheme 1009

1. Pull left air intake grille out of the bumper - arrows -.

Scheme 1010

1. Separate electrical connectors - 1 - and - 5 -.
2. Disconnect hoses - 2 - , - 3 - , - 6 - and - 7 - at secondary air injection (AIR) pumps - 4 - and - 8 - by pressing release buttons.
3. Unbolt secondary air injection (AIR) pumps from bracket.

Installing

1. Installation is performed in reverse order of removal. Note the following

Note. Replace O-rings. Secure all hose connections using hose clamps appropriate for the model type .

1. Deactivate vehicle lifting mode --> «43 - SELF LEVELING SUSPENSION»(/audi/a8/d3-2005-2007/remont/axle-shafts/#suspension-wheels-and-steering) .

Torque specifications

Secondary Air Injection, Left Combination Valve, Removing and Installing

Removing

1. Activate vehicle lifting mode --> «43 - SELF LEVELING SUSPENSION»(/audi/a8/d3-2005-2007/remont/axle-shafts/#suspension-wheels-and-steering) .
2. Remove left front wheel.
3. Remove front part of the left front wheelhouse liner --> «66 - EXTERIOR EQUIPMENT»(/audi/a8/d3-2005-2007/remont/door-locks-anti-theft-systems/#body-exterior) .

Scheme 1011

1. Pull off both air duct hoses - arrows - at bottom of lower part of left air filter housing, thereby pressing release buttons.

Scheme 1012

1. Separate electrical connector - 3 - for mass air flow (MAF) sensor 2 G246.
2. Disconnect hose - 2 - from air duct hose.
3. Disconnect air duct hose - 1 - at intake manifold.
4. Remove bolts - arrows -.

1. Remove upper part of left air filter housing.

Scheme 1013

1. Remove air duct - 1 -.
2. Remove bolts - arrows -.
3. Remove lower part of left air filter housing.

Scheme 1014

1. Pull hose - 1 - off from left combination valve for secondary air injection.
2. Remove bolts - arrows - and remove left combination valve for secondary air injection.

Installing

1. Installation is performed in reverse order of removal. Note the following

Note. Replace gaskets and O-rings. Secure all hose connections using hose clamps appropriate for the model type .

1. Deactivate vehicle lifting mode --> «43 - SELF LEVELING SUSPENSION»(/audi/a8/d3-2005-2007/remont/axle-shafts/#suspension-wheels-and-steering) .

Torque specifications

Secondary Air Injection, Right Combination Valve, Removing and Installing

Removing

1. Disconnect electrical connector - 1 - for mass air flow (MAF) sensor G70.
2. Disconnect air duct hose - 4 - at intake manifold.
3. Unhook retainer for connections - 2 - and - 3 - at upper part of air filter housing.
4. Remove bolts - arrows -.

1. Remove upper part of right air filter housing.

Scheme 1015

1. Remove air duct - 1 -.
2. Remove bolts - arrows -.
3. Remove lower part of right air filter housing.

1. Pull hose - 1 - off from right combination valve for secondary air injection.
2. Remove bolts - arrows - and remove right combination valve for secondary air injection.

Installing

1. Installation is performed in reverse order of removal. Note the following

Note. Replace gaskets and O-rings. Secure all hose connections using hose clamps appropriate for the model type .

Torque specifications

Secondary Air Injection Solenoid Valves, Checking

Solenoid valves are closed when no voltage is present.

Test Conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay J271 -position 4- must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. The Ground (GND) connections between engine and body must be OK.
3. Ignition switched off.
4. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

1. Disconnect corresponding 2-pin connector from Secondary Air Injection (AIR) solenoid valve to be tested

1. 2-pin connector from Secondary Air Injection (AIR) Solenoid Valve 2 N320 on cylinder bank 2.

Note. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Note. All mechanical procedures and exploded view illustrations with torque specifications are described in --> 26 - EXHAUST SYSTEM, EMISSION CONTROLS

Check resistance

Scheme 1016

1. Check resistance between terminals of solenoid valve. Specification: 28.0 to 32.0 ohms

If specification is not obtained

1. Replace corresponding Secondary Air Injection (AIR) Solenoid Valve

1. Secondary Air Injection (AIR) Solenoid Valve N112 --> «26 - EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-engine-mechanical-engine-codes-bsb)
2. Secondary Air Injection (AIR) Solenoid Valve 2 N320 --> «26 - EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-engine-mechanical-engine-codes-bsb) .

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Check wires to control module according to wiring diagram --> «Check wires to control module»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

1. Check wire between test box socket 44 + terminal 2 of 2-pin connector for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
2. Check the wire for short circuit to B+ and Ground (GND). Specification: infinity ohms
3. Check wire between 1-pin connector terminal 2 and Motronic Engine Control Module (ECM) Power Supply Relay J271 for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
4. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.

1. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunctions are detected in the wires and the resistance value is OK

Cylinder bank 1

1. Replace Engine Control Module (ECM) J623 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

Cylinder bank 2

1. Replace Engine Control Module (ECM) 2 J624 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

Secondary Air Injection Pump Motors, Checking

Test Conditions

Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Cylinder bank 1

1. Secondary Air Injection (AIR) Pump Relay J299 , -position 2-, must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Relay and Secondary Air Injection pump installation location

1. In E-box, plenum chamber.

Cylinder bank 2

1. Secondary Air Injection (AIR) Pump Relay J545 , -position 1-, must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Relay and Secondary Air Injection pump installation location

1. In E-box, plenum chamber.

Cylinder bank 1 and 2

1. Battery voltage (both batteries) must be at least 11.5 Volts.
2. All electrical consumers such as, lights and rear window defroster must be switched off.
3. The Ground (GND) connections between engine and body must be OK.
4. Ignition switched off.

Test Sequence

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Note. All mechanical procedures and exploded view illustrations with torque specifications are described in --> 26 - EXHAUST SYSTEM, EMISSION CONTROLS

1. Disconnect corresponding 2-pin connector from Secondary Air Injection (AIR) motor to be tested

1. 2-pin connector - arrow - from Secondary Air Injection (AIR) Pump Motor V101 - 2 - (cylinder bank 1)
2. 2-pin connector - arrow - from Secondary Air Injection (AIR) Pump Motor 2 V189 - 1 - (cylinder bank 2)

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

1. Disconnect corresponding pressure hose at Secondary Air Injection (AIR) pump motor to be tested.

1. Secondary Air Injection (AIR) Pump Motor V101 vacuum hose - 2
2. Secondary Air Injection (AIR) Pump Motor 2 V189 vacuum hose - 1 -.

Note. To disengage, compress the buttons at the hose coupling.

Scheme 1017

1. Connect Secondary Air Injection (AIR) Pump Motor with corresponding adapter lines to positive and negative battery terminals. Secondary Air Injection (AIR) Pump Motor must run and air must escape at compressed-air connection - arrow -.

If the motor does not start up, or no air or only very little air escapes

1. Disconnect connection between Secondary Air Injection (AIR) Pump Motor and battery.
2. Replace corresponding Secondary Air Injection (AIR) pump motor

1. Secondary Air Injection (AIR) Pump Motor V101 --> «26 - EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-engine-mechanical-engine-codes-bsb)
2. Secondary Air Injection (AIR) Pump Motor 2 V189 --> «26 - EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-engine-mechanical-engine-codes-bsb) .

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If motor starts, and air escapes

1. Disconnect connection between Secondary Air Injection (AIR) Pump Motor and battery.
2. Remove corresponding Secondary Air Injection (AIR) pump relay from relay carrier --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

1. Secondary Air Injection (AIR) Pump Motor J299 out of relay plate - 1 - --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Secondary Air Injection (AIR) Pump Motor 2 J545 out of relay plate - 2 - --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Relay and Secondary Air Injection pump installation location

1. In E-box, plenum chamber.

Note. Do not remove relay from relay plate with metal tools. The terminals could conduct electricity.

1. Check wire between terminal 2 of relay carrier and terminal 2 of 2-pin connector of Secondary Air Injection (AIR) Pump Motor for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

Scheme 1018

1. Terminal 2 (terminal 87) of Secondary Air Injection (AIR) Pump Relay on relay carrier.

Scheme 1019

1. Terminal 2 of 2-pin connector of Secondary Air Injection (AIR) Pump Motor.

1. Check the wire for short circuit to B+ and Ground (GND). Specification: infinity ohms

1. Check wire between 2-pin connector terminal 1 and Ground (GND) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring

Cylinder bank 1

1. Replace Engine Control Module (ECM) J623 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

Cylinder bank 2

1. Replace Engine Control Module (ECM) 2 J624 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

Combination Valves, Checking

Test Conditions

1. Vacuum lines and hose connections free of leaks.
2. Vacuum hoses not clogged or kinked
3. Pressure hose between combination valves and pressure hose for Secondary Air Injection (AIR) Pump Motors not clogged or kinked.
4. Ignition switched off.

Test Sequence

Special tools, testers and auxiliary items required

Scheme 1020

1. Hand vacuum pump V.A.G 1390

1. Disconnect corresponding vacuum line of combination valve to be checked

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

1. Connect hand vacuum pump to corresponding vacuum connection of combination valve.
2. Disconnect corresponding pressure hose from combination valve to be checked on Secondary Air Injection (AIR) pump motor

Note. To disengage, compress the buttons at the hose coupling. Do not use compressed air during following check!

1. Blow with light pressure into pressure hose. Both combination valves must be closed.
2. Operate hand vacuum pump. The respective combination valve must open.

If combination valve does not open or it is constantly open

1. Replace respective combination valve
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Ignition System, Servicing

> Safety Precautions .

> Ignition System Components, Removing and Installing .

> Technical Data, Spark Plugs .

> Ignition Coils With Power Output Stage, Removing and Installing

> Ignition Coils With Power Output Stages, Checking

> Camshaft Position Sensor, Checking

> Knock Sensors, Checking

> Camshaft Adjustment Valves, Checking

Note. For trouble-free operation of the electrical components a voltage of at least 11.5 V is necessary. The batteries must only be disconnected and connected with the ignition switched off, since the Engine Control Modules (ECM) can otherwise be damaged. Engine Control Modules (ECM) are equipped with On-Board Diagnostics (OBD). Components marked with * are tested via On Board Diagnostic (OBD), Diagnostic mode 3: Check DTC memory. During some checks it is possible that the control module will detect and store a malfunction. Therefore the following work steps must be performed in the mentioned sequence after ending all tests and repairs. Check DTC memory Erase DTC memory --> Diagnostic Mode 04 - Erase DTC Memory , Diagnostic mode 4: Reset/erase diagnostic data, For completion, generate readiness code --> Readiness Code, Generating .

Right instrument panel fuse holder

Note. If test and measuring equipment is required during road test, note the following: Test and measuring instruments must be secured to rear seat and operated by a 2nd person from this location. If test and measuring instruments are operated from the front passengers seat and the vehicle is involved in an accident, there is a possibility that the person sitting in this seat may receive serious injuries when the airbag is triggered.

Ignition System Components, Removing and Installing

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel. Control housing with camshaft adjustment valves --> Control housing with camshaft adjustment valves

Scheme 1021

1 - Connector

1. Black, 4-pin
2. Before disconnecting, mark allocation of connector to component

2 - Hood

1. For Camshaft Position (CMP) Sensor

3 - Camshaft Position (CMP) sensor*

1. Before disconnecting, mark allocation of connector to component
2. Sensor contacts and connector contacts gold plated
3. Checking --> «Camshaft Position Sensor, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__camshaft-position-sensor-checking)

Cylinder bank 1

1. Camshaft Position (CMP) Sensor 1 G40 on intake camshaft
2. Camshaft Position (CMP) Sensor 3 G300 on exhaust camshaft

Cylinder bank 2

1. Camshaft Position (CMP) Sensor 2 G163 on intake camshaft
2. Camshaft Position (CMP) Sensor 4 G301 on exhaust camshaft

4 - 10 Nm

5 - 20 Nm

1. Torque setting influences the function of knock sensor

6 - Knock sensors*

1. Contact surfaces between knock sensor and cylinder block must be free of corrosion, dirt and grease
2. Checking --> «Knock Sensors, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__knock-sensors-checking)

Cylinder bank 1

1. Component location: Knock Sensors 1 and 2 --> «Component location: Knock sensors 1 and 2 for cylinder bank 1»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)

Cylinder bank 2

1. Component location: Knock Sensors 3 and 4 --> Knock Sensor 3 G198 under «Knock Sensors, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__knock-sensors-checking)

7 - 3-pin connector

1. Contacts gold plated
2. Light gray for Knock Sensor (KS) 1 G61
3. Gray for Knock Sensor (KS) 2 G66
4. Orange for Knock Sensor 3 G198

1. Black for Knock Sensor 4 G199

8 - Spark plug, 30 Nm

1. Type and spark plug gap --> «Technical Data, Spark Plugs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__technical-data-spark-plugs)

9 - Ignition coils with power output stages*

1. Removing and installing --> «Ignition Coils With Power Output Stage, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__ignition-coils-with-power-output-stage)
2. Checking --> «Ignition Coils With Power Output Stages, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__ignition-coils-with-power-output-stages)

Cylinder bank 1

1. Ignition Coil with Power Output Stage 1 to 6 (N70 , N127, N21, N292, N323 and N324)

Cylinder bank 2

1. Ignition Coil with Power Output Stage 7 to 12 (N325 to N330)

Scheme 1022

1. Removing and installing control housing: --> «15 - ENGINE - CYLINDER HEAD, VALVETRAIN»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-engine-mechanical-engine-codes-bsb)

1. Check camshaft adjustment valves --> «Camshaft Adjustment Valves, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__camshaft-adjustment-valves-checking) .

Cylinder bank 1

1 - Valve - 1 - for Camshaft Adjustment Valve 1 N205

2 - E Camshaft Adjustment Valve 1 (exhaust) N318 - 1

3 - Glide track: clipped in at control housing

4 - Control housing

5 - 8 Nm

Cylinder bank 2

1 - Camshaft Adjustment Valve 2 (exhaust) N319 - 2

2 - Camshaft Adjustment Valve 2 N208 - 2

3 - Glide track: clipped in at control housing

4 - Control housing

5 - 8 Nm

Scheme 1023

1 - Knock Sensor (KS) 1 G61

Color identification: light gray

f - For exhaust bank 1 of cylinders 1, 2 and 3

2 - Knock Sensor (KS) 2 G66

Color identification: gray

f - For exhaust bank 2 of cylinders 4, 5 and 6

Scheme 1024

1 - Knock Sensor 3 G198

Color identification: orange

f - For exhaust bank 3 of cylinders 7, 8 and 9

2 - Knock sensor 4 G199

Color identification: black

f - For exhaust bank 4 of cylinders 10, 11 and 12

Technical Data, Spark Plugs

* Engine Control Modules (ECM), replacing --> Safety Precautions

Ignition Coils With Power Output Stage, Removing and Installing

Special tools, testers and auxiliary items required

1. Assembly tool T10118

Scheme 1025

1. Puller T10166

Note. Ignition coils and power output stages are one component and cannot be replaced individually.

Removing

1. Remove engine covers.
2. Remove both side parts of intake manifold --> «Intake Manifold, Disassembling and Assembling»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__intake-manifold-disassembling-and-assembling) .
3. Disconnect 4-pin connectors from ignition coils 1 through 12.

Note. Assembly tool T10118 can be used to release connector catches. Before disconnecting harness connectors, mark allocation to component.

Scheme 1026

1. Slide on puller T10166 in direction of arrow, and pull out ignition coil with power output stage.

Installing

1. Insert ignition coil with power output stage into spark plug shaft so that the connector connections cannot contact the cylinder head cover.
2. Press ignition coil with power output stage by hand into spark plug up to stop.

Ignition Coils With Power Output Stages, Checking

Special tools, testers and auxiliary items required

Scheme 1027

1. Assembly tool T10118
2. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
3. Voltage tester V.A.G 1527
4. Test adapter kit V.A.G 1594

1. Wiring diagram

Note. Ignition coils and power output stages are one component and cannot be replaced individually.

Test Conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay J271 -position 4- must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Battery voltage (both batteries) must be at least 11.5 Volts.
3. All electrical consumers such as, lights and rear window defroster must be switched off.
4. For vehicles with automatic transmission, selector lever must be in "P".

1. Parking brake must be engaged.
2. The Ground (GND) connections between engine and body must be OK.
3. Engine Speed (RPM) sensor must be OK, checking --> «Engine Speed Sensor, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__engine-speed-sensor-checking) .
4. Camshaft Position (CMP) sensors must be OK, checking --> «Camshaft Position Sensor, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__camshaft-position-sensor-checking) .

1. Ignition switched off.
2. The OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

1. Remove engine covers.
2. Remove both side parts of intake manifold --> «Intake Manifold, Disassembling and Assembling»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__intake-manifold-disassembling-and-assembling) .
3. Disconnect the 4-pin connectors from ignition coils 1 through 12.

Note. Assembly tool T10118 can be used to release connector catches. Before disconnecting harness connectors, mark allocation to component. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Checking voltage supply

1. Check voltage supply between terminals 1 + 2 and 1 + 4 of the respective connector for ignition coils using the multimeter and adapter cables.
2. Switch ignition on. Specification: at least 11.5 V
3. Switch ignition off.

If no voltage is present

1. Check voltage supply at 4-pin connector terminal 1 according to wiring diagram: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Check wires between 4-pin connector and Ground (GND) for open circuit according to wiring diagram. Terminal 2 and Ground (GND) terminal 4 and Ground (GND) wire resistance: max. 1.5 ohms
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If there is no malfunction in the voltage supply

1. Check activation --> «Check activation»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__check-activation) .

Check activation

1. Remove fuses 29 and 30 for fuel injectors 1 to 12 from fuse holder --> Electrical Wiring Diagrams, Troubleshooting and Component Locations.

1. Fuse holder in right of instrument panel.

1. Connect voltage tester with adapter cables to terminal 3 + engine Ground (GND) on the disconnected connector for Ignition Coil 1 with Power Output Stage N70 , cylinder 1.
2. Operate starter and test ignition signal from the corresponding Engine Control Module (ECM). LED must flicker
3. Repeat test at connectors for ignition coils cylinder 2 through 12.
4. Switch ignition off.

1. Place fuses 29 and 30 for fuel injectors 1 to 12 back in the fuse holder.

1. Fuse holder in right of instrument panel.

If LED flickers and voltage supply is OK

1. Replace respective ignition coils with power output stage --> «Ignition Coils With Power Output Stage, Removing and Installing»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__ignition-coils-with-power-output-stage) , ignition coils with power output stages, removing and installing.
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If LED does not flicker

1. Check wires to Engine Control Module (ECM) according to wiring diagram --> «Checking wires to Engine Control Module (ECM)»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

1. Check wires between test box and 4-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

Cylinder bank 1

Cylinder bank 2

Cylinder bank 1 and 2

1. Check wires for short circuit to B+ and Ground (GND). Specification: infinity ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If there is no malfunction in wiring connections

Cylinder bank 1

1. Replace Engine Control Module (ECM) J623 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__safety-precautions) .

Cylinder bank 2

1. Replace Engine Control Module (ECM) 2 J624 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__safety-precautions) .

Terminal Resistance for CAN-Bus, Checking

Function

The Engine Control Modules communicate with all databus-capable control modules via a CAN-Bus.

These databus-capable control modules are connected via two data bus wires which are twisted together (CAN_High and CAN_Low), and exchange information (messages). Missing information on the databus is recognized as a malfunction and stored.

Trouble-free operation of the CAN-Bus requires that it have a terminal resistance. This central terminal resistor is located in the corresponding Engine Control Module.

Test Conditions

1. A CAN-bus malfunction was recognized via On Board Diagnostic, Diagnostic mode 3: Check DTC memory.
2. Ignition switched off.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test Sequence

1. Connect test box to the corresponding Engine Control Module, connecting test box for wiring test. The control module wiring harness is not connected.
2. Check central terminal resistance in Engine Control Module
3. Measure resistance between test box sockets 58 +60: Specification: 115 to 135 ohms

If resistance value is not in specified range

Replace the engine control module.

If resistance value is in specified range

1. Eliminate malfunction in CAN-Bus wires or in other CAN-Bus components according to wiring diagram: Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. Erase DTC memory of Engine Control Module --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Camshaft Position Sensor, Checking

Note. Use only gold-plated terminals when servicing terminals in harness connector of sensors.

Test Conditions

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram
4. Battery voltage (both batteries) must be at least 11.5 Volts.

1. All electrical consumers such as, lights and rear window defroster must be switched off.
2. For vehicles with automatic transmission, selector lever must be in "P".
3. Parking brake must be engaged.
4. The Ground (GND) connections between engine and body must be OK.

1. Ignition switched off.
2. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

Cylinder bank 1

1. Disconnect corresponding 3-pin connector from Camshaft Position (CMP) sensor

Camshaft Position (CMP) sensors 1 and 3

Scheme 1028

1 - Camshaft Position (CMP) Sensor 1 G40 on intake camshaft

4 - Camshaft Position (CMP) Sensor 3 G300 on exhaust camshaft

Cylinder bank 2

1. Disconnect corresponding 3-pin connector from Camshaft Position (CMP) sensor

Camshaft Position (CMP) sensors 2 and 4

Scheme 1029

1 - Camshaft Position (CMP) Sensor 4 G301 on exhaust camshaft

4 - Camshaft Position (CMP) Sensor 2 G163 on intake camshaft

Cylinder bank 1 and 2

Note. Before disconnecting harness connectors, mark allocation to component. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Checking voltage supply

1. Connect multimeter to terminal 1 (B+) and 3 (Ground (GND)) of the respective connector for Camshaft Position (CMP) sensor for voltage measurement.
2. Switch ignition on. Specification: at least 4.5 V
3. Switch ignition off.

If no voltage is present

1. Check wires to Engine Control Module (ECM) according to wiring diagram --> «Checking wires to Engine Control Module (ECM)»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

Scheme 1030

1. Check wires between test box and 3-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

Cylinder bank 1

Cylinder bank 2

Cylinder bank 1 and 2

1. Check wires for short circuit to each other. Specification: infinity ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is found in the wires and there was voltage between terminals 1 + 3

1. Replace respective camshaft position sensor .
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is found in the wires and there was no voltage between terminals 1 and 3

Cylinder bank 1

1. Replace Engine Control Module (ECM) J623 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__safety-precautions) .

Cylinder bank 2

1. Replace Engine Control Module (ECM) 2 J624 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__safety-precautions) .

Knock Sensors, Checking

Note. Contact surfaces between knock sensor and cylinder block must be free of corrosion, dirt and grease. To ensure problem-free function of knock sensors, it is important that torque specification of 20 Nm be adhered to exactly. Use only gold-plated terminals when servicing terminals in harness connector of knock sensors.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test Conditions

1. The Ground (GND) connections between engine and body must be OK.
2. Knock sensor screws tightened to 20 Nm.
3. Ignition switched off.

Test Sequence

Cylinder bank 1

Scheme 1031

1. Disconnect corresponding 3-pin harness connector from Knock Sensor (KS)

1 - Knock Sensor (KS) 1 G61

Color identification: white

f - For exhaust bank 1 of cylinders 1, 2 and 3

2 - Knock Sensor (KS) 2 G66

Color identification: Gray

f - For exhaust bank 2 of cylinders 4, 5 and 6

Note. The 3-pin harness connectors are located above torque converter housing and are only accessible after lowering the subassembly.

Cylinder bank 2

Scheme 1032

1. Disconnect corresponding 3-pin harness connector from Knock Sensor (KS)

1 - Knock Sensor 3 G198

Color identification: brown

f - For exhaust bank 3 of cylinders 7, 8 and 9

2 - Knock sensor 4 G199

Color identification: black

f - For exhaust bank 4 of cylinders 10, 11 and 12

Cylinder bank 1 and 2

Note. Before disconnecting harness connectors, mark allocation to component. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Checking resistances

Scheme 1033

1. Check resistance between terminals 1 + 2, 1 + 3 and 2 + 3 at the connections to the respective knock sensors. Specification: infinity ohms

If specification is not obtained

1. Replace respective knock sensor

1. Knock sensors 1 and 2 for cylinder bank 1
2. Knock sensors 3 and 4 for cylinder bank 2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Check wires to Engine Control Module (ECM) according to wiring diagram --> «Knock Sensors, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__knock-sensors-checking) .

Checking wires to Engine Control Module (ECM) 1

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

Scheme 1034

1. Check wires between test box and 3-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

Cylinder bank 1

Cylinder bank 2

Cylinder bank 1 and 2

1. Check wires for short circuit to each other. Terminal 1 + Socket 99 specified value: infinity ohms
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunction is detected in the wiring

Cylinder bank 1

1. Replace Engine Control Module (ECM) J623 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__safety-precautions) .

Cylinder bank 2

1. Replace Engine Control Module (ECM) 2 J624 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__safety-precautions) .

Camshaft Adjustment Valves, Checking

Function

The camshaft adjustment is load- and RPM dependent. The electrical valves for camshaft adjustment switch oil pressure onto camshaft adjusters (mechanical adjustment mechanisms), which then adjust the camshafts.

Special tools, testers and auxiliary items required

1. Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
2. Test adapter kit V.A.G 1594
3. Wiring diagram

Test Conditions

1. Motronic Engine Control Module (ECM) Power Supply Relay J271 -position 4- must be OK, check: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations
2. The Ground (GND) connections between engine and body must be OK.
3. Ignition switched off.
4. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Test Sequence

Cylinder bank 1

1. Disconnect corresponding 2-pin harness connector from respective valve for camshaft adjustment

2 - Camshaft Adjustment Valve 1 N205 - 1

3 - Camshaft Adjustment Valve 1 (exhaust) N318 - 1

Cylinder bank 2

1. Disconnect corresponding 2-pin harness connector from the respective valve for camshaft adjustment

2 - Camshaft Adjustment Valve 2 (exhaust) N319 - 2

3 - Camshaft Adjustment Valve 2 N208 - 2

Cylinder bank 1 and 2

Note. Before disconnecting harness connectors, mark allocation to component. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Checking resistances

1. Check resistance between terminals at connector to respective valve for camshaft adjustment. Specification: 10.0 to 18.0 ohms

If specification is not obtained

1. Replace respective control housing with both camshaft adjustment valves --> «Control housing with camshaft adjustment valves»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) , --> «Control housing with camshaft adjustment valves»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If specification is obtained

1. Check wires to Engine Control Module (ECM) according to wiring diagram --> «Camshaft Adjustment Valves, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__camshaft-adjustment-valves-checking) .

1 Checking wires to Engine Control Module (ECM)

Cylinder bank 1

1. Connect test box to Engine Control Module (ECM) J623 wiring harness on connecting test box for wiring test.

Cylinder bank 2

1. Connect test box to Engine Control Module (ECM) 2 J624 wiring harness on connecting test box for wiring test.

Cylinder bank 1 and 2

1. Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms

Cylinder bank 1

Cylinder bank 2

Cylinder bank 1 and 2

1. Check the wire for short circuit to B+ and Ground (GND). Specification: infinity ohms
2. Check wire between 1-pin connector terminal 2 and Motronic Engine Control Module (ECM) Power Supply Relay J271 for open circuit according to wiring diagram. Wiring resistance: max. 1.5 ohms
3. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
4. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

If no malfunctions are detected in the wires and the resistance value is OK

Cylinder bank 1

1. Replace Engine Control Module (ECM) J623 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__safety-precautions) .

Cylinder bank 2

1. Replace Engine Control Module (ECM) 2 J624 --> «Safety Precautions»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__safety-precautions) .

Transmission Regulating Electrical Components, Checking

Multi-Function Transmission Range (TR) switch F125 , Transmission Fluid Temperature Sensor G93 , Transmission Input Speed (RPM) Sensor G182 , Transmission Output Speed (RPM) Sensor G195 and solenoid and pressure regulation valves are integrated into the Mechatronic.

All of these components can neither be tested electrically nor replaced individually. In the event of a defect, the entire Mechatronic must be replaced.

Scheme 1035

Only the wiring harness - A - with electrical connector - C - between Mechatronic - B - and the 16-pin connector on transmission housing can be replaced individually --> 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS for 6 SPD. AUTOMATIC TRANSMISSION 09E ALL WHEEL DRIVE or 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE.

> TCM Voltage Supply, Checking

> Transmission Control Module, Replacing

TCM Voltage Supply, Checking

Special tools, testers and auxiliary items required

Scheme 1036

1. V.A.G. 1526 A multimeter

Scheme 1037

1. V.A.G 1594 A connector test kit

Note. Transmission electronics fuse OK --> Electrical Wiring Diagrams, Troubleshooting and Component Locations Ground connections on engine and transmission OK. Battery voltage at least 12.5 V Alternator OK Ignition switched off.

Test Sequence

1. Touch vehicle Ground (GND) with your hand (without gloves) to discharge static.

Scheme 1038

1. Disconnect electrical harness connector on transmission, to do this turn plug counterclockwise - arrow -.

Scheme 1039

1. Connector multimeter for voltage measurement to vehicle wiring harness 16-pin connector as follows

1. Specification: approx. battery voltage

1. Connect multimeter for voltage measurement as follows

1. Switch ignition on.

1. Specification: approx. battery voltage respectively

1. Switch ignition off.

If specifications are not obtained

1. Check wire connections for open circuit according to wiring diagram

1. Specification: Wire resistance max 1.5 ohms

1. If necessary, repair wire connection.

Final procedures

After repair work, the following work steps must be performed in the mentioned sequence

1 - Check DTC memory --> " "Mode 3: Check DTC memory".

2 - If necessary, erase DTC memory --> "Mode 4: Reset/erase diagnostic data" , --> Diagnostic Mode 04 - Erase DTC Memory .

3 - If DTC memory was erased, generate readiness code --> Readiness Code, Generating .

1. End diagnosis and switch ignition off.

Transmission Control Module, Replacing

Note. Country-specific laws make adaptation of the Transmission Control Module (TCM) to the vehicle necessary. This "writing" function is not possible with the generic scan tool, therefore it is necessary to use the Vehicle Diagnosis Service Syst. VAS5052 in On Board Diagnostic (OBD) function for this purpose. Procedure to replace Transmission Control Module (TCM): --> 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS for 6 SPD. AUTOMATIC TRANSMISSION 09E ALL WHEEL DRIVE or 38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE

Final procedures

After connecting harness connectors to control module, the following work steps must be performed in the mentioned sequence

1 - Check DTC memory --> " "Mode 3: Check DTC memory".

2 - If necessary, erase DTC memory --> "Mode 4: Reset/erase diagnostic data" , --> Diagnostic Mode 04 - Erase DTC Memory .

3 - If DTC memory was erased, generate readiness code --> --> Readiness Code, Generating .

1. End diagnosis and switch ignition off.

OBD, General Information

> On Board Diagnostic Technical Data

> Selectable Diagnostic Modes

> Diagnostic Tester, Connecting

The Engine and Transmission Control Modules are equipped with a DTC memory.

If malfunctions occur in emissions-related systems or components, they are stored in DTC memory with a description of the malfunction type.

Control modules differentiate between different DTCs after evaluating the information --> DTC Tables .

Stored malfunctions can be retrieved with a commercially available tester --> Diagnostic Mode 03 - Read DTC Memory , Diagnostic mode 3: Check DTC memory.

When connectors are disconnected from the Engine Control Module (ECM) or the batteries are disconnected, all adaptation values in the control module are erased. DTC memory content will remain intact however. If the engine is started after this, the idle may be rough for a short period. In this case, the readiness code must be generated again --> Readiness Code, Generating .

The following work steps must be performed in the described sequence after the malfunction(s) have been repaired

1.- Check DTC memory --> Diagnostic Mode 03 - Read DTC Memory , Diagnostic mode 3: Check DTC memory.

2.- Erase DTC memory --> Diagnostic Mode 04 - Erase DTC Memory , Diagnostic mode 4: Reset/erase diagnostic data.

3.- For completion, generate readiness code --> Readiness Code, Generating .

On Board Diagnostic Technical Data

The control module version is displayed by selecting "Diagnostic mode 9: Vehicle information" under address word 33 --> Diagnostic Mode 09 - Read Vehicle Information .

Engine Control Modules (ECM) equipment.

Transmission Control Module (TCM) equipment.

Selectable diagnostic modes under address word 33 - OBD --> Selectable Diagnostic Modes .

Control Module Identification

The control module version is displayed by selecting "Diagnostic mode 9: Vehicle information" under address word 33 --> Diagnostic Mode 09 - Read Vehicle Information .

Selectable diagnostic modes under address word 33 - OBD --> Selectable Diagnostic Modes .

Engine Control Module

1) LEV = Low Emission Vehicles (emission values max. 0.075 g/mi HC)

2) Independent of voltage supply.

3) Values are erased when voltage supply is interrupted.

Transmission Control Module

1) Independent of voltage supply.

Selectable Diagnostic Modes

Note. The conditions required for selecting the desired diagnostic mode are listed in the following table

1) Perform only with ignition switched on when engine will not start (operate starter for at least 6 seconds).

2) Can only be selected with module number "10 - Engine electronics" and "11 Engine electronics II".

Note. The Engine Control Module (ECM) J623 with module number "10 - Engine electronics" controls cylinder bank 1 electrical components. The Engine Control Module (ECM) 2 J624 with module number "11 - Engine electronics II" controls cylinder bank 2 electrical components. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Diagnostic Tester, Connecting

Special tools and Equipment

Scheme 1040

1. Vehicle Diagnosis and Service System with VAS 5052
2. Diagnostic cable VAS 5052/3

Requirement

1. Battery voltage (both batteries) must be at least 11.5 Volts.
2. All electrical consumers such as, lights and rear window defroster must be switched off.
3. For vehicles with automatic transmission, selector lever must be in "P".
4. Parking brake must be engaged.

1. The ground (GND) connections between engine, transmission and body must be OK.
2. Ignition switched off.
3. Fuses in right instrument panel fuse holder must be OK: --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Right instrument panel fuse holder

Work Procedure

Connect diagnostic tester (VAS 5052) using (VAS 5052/3) diagnostic cable as follows

1. Connect diagnostic cable connector to Data Link Connector (DLC).
2. Depending on desired diagnostic mode, it is necessary to: switch ignition on or start engine, selectable diagnostic modes under address word 33.

Note. Respective operation of the diagnostic tester: --> Operating instructions of the diagnostic tester If no display appears on diagnostic tester, check voltage supply at Diagnostic Link Connector (DLC): --> Electrical Wiring Diagrams, Troubleshooting and Component Locations

Diagnostic Mode, Selecting

> Address Word 33 - On-Board Diagnostic

> Diagnostic Mode 01 - Read Current System Data

> Diagnostic Mode 01 - Read Current System Data

> Diagnostic Mode 03 - Read DTC Memory

> SAE Diagnostic Trouble Codes

> Diagnostic Mode 04 - Erase DTC Memory

> Diagnostic Mode 05 - Read Oxygen Sensor Monitoring Test Results

> Diagnostic Mode 06 - Read Test Results for Specific Diagnostic Functions

> Diagnostic Mode 07 - Read Faults Detected During the Current or Last Driving Cycle

> Diagnostic Mode 08 - Request Control of On-Board System, Test or Component

> Diagnostic Mode 09 - Read Vehicle Information

Address Word 33 - On-Board Diagnostic

Special tools, testers and auxiliary items required

1. Vehicle Diagnosis Service Syst. VAS 5052 with
2. Diagnostic cable VAS 5052/3

Under "address word 33 - On-Board Diagnostic (OBD)" , various diagnostic modes for Engine Control Modules (ECM) and Transmission Control Module -TCM- (in vehicles with automatic transmission) can be selected via diagnostic tester.

The following diagnostic modes monitor all components and systems which influence the emission quality.

Note. The Engine Control Module (ECM) J623 reports with module number "10 - Engine electronics" and controls cylinder bank 1 electrical components. The Engine Control Module (ECM) 2 J624 reports with module number "11 - Engine electronics II" and controls cylinder bank 2 electrical components. The Transmission Control Module (TCM) J217 reports with module number "1A - Transmission electronics". Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Diagnostic Mode 01 - Read Current System Data

Diagnostic Mode 01 makes it possible to access current emissions-related measured values and diagnostic data. The original measured values (no replacement values), input and output data and system status information are displayed using Diagnostic Mode 1.

Conditions

1. Coolant temperature must be at least 80 C --> PID 05, Coolant temperature.

Work procedure

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Depending on desired operating condition: switch on ignition or start engine and let run at idle.
3. Under address word 33, select "Diagnostic mode 1: Check measured values".
4. Select desired measured values "PID XX".

Note. The specified values for the measuring values can be found under the respective component- and function tests. The following list only serves as an overview. The measuring values are sorted according to the PID (parameter-identifications). Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

1. End diagnosis and switch ignition off.

Diagnostic Mode 01 makes it possible to access current emissions-related measured values and diagnostic data. The original measured values (no replacement values), input and output data and system status information are displayed using Diagnostic Mode 1.

Work procedure

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Depending on desired operating condition: Switch on ignition or start engine and let run at idle.
3. Under address word 33, select "Diagnostic mode 2: Read operating conditions".
4. Select desired operating condition "PID XX".

Note. The following list only serves as an overview. The operating conditions are sorted by the PID (parameter-identifications). Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

1. End diagnosis and switch ignition off.

If DTCs are displayed in "PID 02"

1. Repair stored malfunctions according to DTC table

1. SAE P0xxx-DTCs --> «SAE P0xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
2. SAE P1xxx-DTCs --> «SAE P1xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
3. SAE P2xxx-DTCs --> «SAE P2xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
4. SAE P3xxx-DTCs --> «SAE P3xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)

1. SAE U0xxx-DTCs --> «SAE U0xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

Note. The DTC table is sorted by SAE code. Erase DTC memory after repairing malfunction --> Diagnostic Mode 04 - Erase DTC Memory , Diagnostic mode 4: Reset/erase diagnostic data.

Diagnostic Mode 03 - Read DTC Memory

Diagnostic Mode 03 makes it possible to read emissions-related faults (confirmed DTCs: faults which have activated the MIL) in the ECM and in the TCM.

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Start engine and let run at idle.

Note. Only when engine does not start: Operate starter for approx. 6 seconds. Do not switch off ignition afterwards.

1. Under address word 33, select "Diagnostic mode 3: Read DTC memory". "0 malfunctions recognized" is displayed.
2. End diagnosis and switch ignition off.
3. Repair stored malfunctions according to DTC table

1. SAE P0xxx-DTCs --> «SAE P0xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
2. SAE P1xxx-DTCs --> «SAE P1xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
3. SAE P2xxx-DTCs --> «SAE P2xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
4. SAE P3xxx-DTCs --> «SAE P3xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .
5. SAE U0xxx-DTCs --> «SAE U0xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

Note. The DTC table is sorted by SAE code. "EPC" -relevant malfunctions are also indicated by the "Electronic Power Control (EPC) Warning Lamp" in the instrument cluster. In addition, "emission" -relevant malfunctions are indicated in the instrument cluster via the Malfunction Indicator Lamp (MIL). In Diagnostic mode 2, it can be determined at which operating condition a malfunction was detected and stored --> Diagnostic Mode 01 - Read Current System Data , Diagnostic mode 2: Check operating conditions.

1. Erase DTC memory after repairing malfunction --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.

Display example

P0444 Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 circuit open

Explanation

1. P0444 = SAE diagnostic trouble code (malfunction identification number).
2. Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 = malfunctioning wiring path or malfunctioning component.
3. Open circuit = Malfunction type as text

SAE Diagnostic Trouble Codes

The DTC always consists of a 5-digit alpha-numeric value with the following meaning

Diagnostic Mode 04 - Erase DTC Memory

Diagnostic Mode 04 makes it possible to erase the DTC memory and to reset all emissions-related diagnostic data. In that way, all faults in the DTC memory in the ECM and TCM are erased. The adaptation values may also be reset.

Emissions-related diagnostic data includes (as applicable)

1. MIL Status
2. Number of DTCs
3. Readiness Bits
4. Confirmed DTCs

1. Pending DTCs
2. DTC that belongs to freeze frame
3. Freeze frame data
4. Test results of specific diagnostic functions

1. Distance driven with MIL ON
2. Number of Warm-Up Cycles after erasing the DTC memory
3. Distance driven after erasing the DTC memory
4. Misfire counter

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Start engine and let run at idle.
3. Under address word 33, select "Diagnostic mode 4: Resetting/erasing diagnostic data".

Erased or reset

1. Number and content of DTC memories
2. Operating conditions
3. Adaptation values
4. Test results.

1. End diagnosis and switch ignition off.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Diagnostic Mode 05 - Read Oxygen Sensor Monitoring Test Results

Note. Mode 05 may not be supported on all systems. On systems where Diagnostic Mode 05 is not supported, refer to Diagnostic Mode 6 for Oxygen Sensor Monitoring Test Results.

Note. This diagnostic mode can only be selected with module number "10 - Engine electronics" and "11 - Engine electronics II".

Requirements

1. Exhaust system must be properly sealed between catalytic converters and cylinder heads.
2. There must not be any DTCs stored in DTC memory --> «Diagnostic Mode 03 - Read DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-03-read-dtc) , Diagnostic mode 3: Check DTC memory.
3. Coolant temperature must be at least 80 C --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 05, Coolant temperature.

Function

The static values of the oxygen sensors are indicated via this diagnostic mode.

The values of the individual oxygen sensor test results must reach the specified value or must be within the min.- and max.- limits.

Work Procedure

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Start engine and let run at idle.
3. Under address word 33, select "Diagnostic mode 5: Check Lambda test results".
4. Select desired lambda test results "Test-ID XX".

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

1. End diagnosis and switch ignition off.

Evaluation Test 07 - Minimum Voltage At Sensor for Test Cycle

If specification is exceeded

1. Oxygen sensor not ready for operation
2. Oxygen sensor heater faulty

1. Oxygen sensor heating for sensor behind catalytic converter, checking --> «Oxygen Sensor Heaters After Catalytic Converter, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__oxygen-sensor-heaters-after-catalytic-converter) .

1. Short circuit to B+ or open circuit in wiring in oxygen sensor or in wire

1. Heated Oxygen Sensor (HO2S) and oxygen sensor control after catalytic converter, checking --> «Oxygen Sensors and Oxygen Sensor Regulation after Catalytic Converter, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__oxygen-sensors-and-oxygen-sensor-regulation) .

Evaluation Test 08 - Maximum Voltage At Sensor for Test Cycle

If specification is not obtained

1. Oxygen sensor not ready for operation
2. Oxygen sensor heater faulty

1. Oxygen sensor heating for sensor behind catalytic converter, checking --> «Oxygen Sensor Heaters After Catalytic Converter, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__oxygen-sensor-heaters-after-catalytic-converter) .

1. Short circuit to Ground (GND) or open circuit in wiring in oxygen sensor or in wire

1. Heated Oxygen Sensor (HO2S) and oxygen sensor control after catalytic converter, checking --> «Oxygen Sensors and Oxygen Sensor Regulation after Catalytic Converter, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__oxygen-sensors-and-oxygen-sensor-regulation) .

If specification is exceeded

1. Short circuit to B+ in oxygen sensor or in wire

1. Heated Oxygen Sensor (HO2S) and oxygen sensor control after catalytic converter, checking --> «Oxygen Sensors and Oxygen Sensor Regulation after Catalytic Converter, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__oxygen-sensors-and-oxygen-sensor-regulation) .

Evaluation Test 129 - Oxygen Sensor Value

If specifications are not obtained

1. Replace respective oxygen sensor
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Evaluation Test-Id 130 - Control Barrier Value

If specifications are not obtained

1. Replace respective oxygen sensor
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Evaluation Test 131 - Dynamic Value

If specifications are not obtained

1. Replace respective oxygen sensor
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Diagnostic Mode 6 - Checking Test Results of Components Not Continuously Monitored

Note. This diagnostic mode can only be selected with module number "10 - Engine electronics" and "11 - Engine electronics II".

Function

This diagnostic mode displays the test results of emission relevant components and systems which are not continuously monitored.

The values of the individual test results must reach the specified value or must be within the min.- and max.- limits.

Note. Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel. Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

Diagnostic Mode 06 - Read Test Results for Specific Diagnostic Functions

Diagnostic Mode 06 makes it possible to retrieve test results for special components and systems which are continuously or not continuously monitored. If the diagnosis of a system is complete, the diagnostic result and the corresponding thresholds are saved and displayed in mode 06. This data remains saved (even with the ignition off) until either new diagnostic results become available or the DTC memory is erased.

Test 01 - Catalytic Converter

Test conditions

1. There must not be any DTCs stored in DTC memory --> «Diagnostic Mode 03 - Read DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-03-read-dtc) , Diagnostic mode 3: Check DTC memory.
2. Coolant temperature must be at least 80 C --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 05, Coolant temperature.

Work procedure

1. Read readiness code --> «Readiness Code, Reading»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-reading) .
2. Let engine run at idle.
3. Under address word 33, select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
4. Select "Test-ID 01: Catalytic converter".

1. Check specified values at idle.

Evaluation test-ID 01: Catalytic converter monitoring

1. End diagnosis and switch ignition off.

If the specifications are not obtained

1. Replace front catalytic converter or cylinder bank 1 catalytic converter: removing and installing --> «26 - EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-engine-mechanical-engine-codes-bsb)

Cylinder bank 2

1. Catalytic converter with front muffler, see --> «26 - EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-engine-mechanical-engine-codes-bsb) .

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Test 03 - Secondary Air Injection System

Test conditions

1. There must not be any DTCs stored in DTC memory --> «Diagnostic Mode 03 - Read DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-03-read-dtc) , Diagnostic mode 3: Check DTC memory.
2. Intake air temperature 5 to 35 C --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 15: Intake air temperature
3. Coolant temperature approx. intake air temperature (5 to 30 C) --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 05, Coolant temperature.

Work procedure

1. Read readiness code --> «Readiness Code, Reading»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-reading) .
2. Let engine run at idle.
3. Under address word 33, select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
4. Select "Test-ID 03: Secondary air injection system".

1. Check specified values at idle.

Evaluation test-ID 03: Secondary air injection (AIR) system

1. End diagnosis and switch ignition off.

If specifications are not obtained

1. Secondary Air Injection (AIR) system, checking for proper seal --> «Secondary Air Injection Combination Valve, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-combination-valve-checking) .
2. Secondary Air Injection (AIR) Solenoid Valve N112 and Secondary Air Injection (AIR) Solenoid Valve 2 N320 , checking --> «Secondary Air Injection Solenoid Valves, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-solenoid-valves-checking) .
3. Secondary Air Injection (AIR) Pump Motors V101 and Secondary Air Injection (AIR) Pump Motor 2 V189 , checking --> «Secondary Air Injection Pump Motors, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-pump-motors-checking) .
4. Combination valves, checking --> «Secondary Air Injection Combination Valve, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__secondary-air-injection-combination-valve-checking) .

1. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
2. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Test 05 - Tank Ventilation System

Test conditions

1. There must not be any DTCs stored in DTC memory --> «Diagnostic Mode 03 - Read DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-03-read-dtc) , Diagnostic mode 3: Check DTC memory.
2. Coolant temperature must be at least 80 C --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.

Work procedure

1. Read readiness code --> «Readiness Code, Reading»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-reading) .
2. Let engine run at idle.
3. Under address word 33, select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
4. Select "Test-ID 05: Tank ventilation system".

1. Check specified values at idle.

Evaluation test-ID 05: Tank ventilation system

1. End diagnosis and switch ignition off.

If specifications are not obtained

1. EVAP canister system, checking for proper seal --> «EVAP System, Checking for Proper Seal»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__evap-system-checking-for-proper-seal) .
2. Evaporative Emission (EVAP) Canister Purge Regulator Valve 2 N333 , checking --> «EVAP Canister Purge Regulator Valve 2, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__evap-canister-purge-regulator-valve-2) .
3. Fuel system Leak Detection Pump (LDP) V144 , checking --> Leak Detection Pump, Checking .
4. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.

1. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Test 09 - Engine Coolant Temperature Sensor

Test conditions

1. There must not be any DTCs stored in DTC memory --> «Diagnostic Mode 03 - Read DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-03-read-dtc) , Diagnostic mode 3: Check DTC memory.
2. Coolant temperature must be at least 80 C --> «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 05, Coolant temperature.

Work procedure

1. Read readiness code --> «Readiness Code, Reading»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-reading) .
2. Let engine run at idle.
3. Under address word 33, select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
4. Select "Test ID 09: Coolant temperature sensor".

1. Check specified values at idle.

Evaluation test-ID 09: Engine Coolant Temperature (ECT) Sensor G62

1. End diagnosis and switch ignition off.

If specifications are not obtained

1. Engine Coolant Temperature (ECT) Sensor G62 , checking --> «Coolant Temperature Sensor, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__coolant-temperature-sensor-checking) .
2. Erase DTC memory of Engine Control Module (ECM) --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
3. Generate readiness code --> «Readiness Code, Generating»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code-generating) .

Diagnostic Mode 07 - Read Faults Detected During the Current or Last Driving Cycle

Mode 07 makes it possible to check emissions-related faults which appeared during the current or last driving cycle (pending DTCs).

A pending DTC is saved the first time a fault is detected (output via Mode 07).

1. If the fault is detected again by the end of the following driving cycle, a confirmed DTC is entered (output via Mode 03) and the MIL is activated.
2. If this malfunction is not detected again by the end of the following driving cycle, the corresponding pending code will be deleted at the end of the driving cycle.

Note. Depending on scan tool and protocol used, some of the information provided may be referred to by a different name.

Procedure

1. Connect the scan tool.
2. Start the engine and run at idle.

Note. If the engine does not start, crank the engine using starter for at least 5 seconds. Do not switch the ignition off afterward.

1. Select "Mode 7: Check test results of components that are continuously monitored".

The number of pending DTCs or "0 malfunctions detected" will be displayed on the scan tool screen.

1. Refer to the following DTC tables for the diagnostic repair procedure

1. SAE P0xxx-DTCs --> «SAE P0xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
2. SAE P1xxx-DTCs --> «SAE P1xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
3. SAE P2xxx-DTCs --> «SAE P2xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
4. SAE P3xxx-DTCs --> «SAE P3xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb)
5. SAE U0xxx-DTCs --> «SAE U0xxx-DTCs»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb) .

1. Switch the ignition off.

Diagnostic Mode 08 - Request Control of On-Board System, Test or Component

Diagnostic Mode 08 is used to control the operation of an on-board system, test or component. A Mode 8 service can be used to turn on-board system ON or OFF, or to cycle an on-board system, test or component ON or OFF for a specific period of time. The service can also be used to request system status or to report test results.

Diagnostic Mode 08, TID $01

Diagnostic Mode 08, TID $01 is used to determine if the evaporative system may be leaking.

Note. Evaporative Emission (EVAP) Canister Purge Regulator Valve 2 N333 and fuel system Leak Detection Pump (LDP) V144 seal fuel system. Using engine leak detection spray (e.g.: G 001 800 A1) leaks can be detected.

Test Conditions

1. There must not be any DTCs stored in DTC memory «Diagnostic Mode 03 - Read DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-03-read-dtc) , Diagnostic mode 3: Check DTC memory.
2. Coolant temperature must be 80 to 110 degree C «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 05, Coolant temperature.
3. Intake air temperature must not be above the maximum of 60 degree C «Diagnostic Mode 01 - Read Current System Data»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-01-read-current) , Diagnostic mode 1: Check measured values; PID 15, Intake air temperature.

Function Test

1. Connect diagnostic tester.
2. Start engine and let run at idle for at least 15 minutes.
3. Under address word 33, select "Diagnostic mode 8: Tank leak test" .
4. Select measuring value "Test ID 01: Tank leak test" .
5. Check specified value of tank leak test at idle.

Evaluation test-ID 01: Tank leak test

Note. During tank leak test, "test function active" is limited to approx. 12 minutes. If the accelerator pedal is depressed during the test, the test will be aborted. To repeat the tank leak test, switch ignition off and start engine again and let run at idle for at least 15 minutes.

1. End diagnosis and switch ignition off.

If a leak is detected

1. EVAP canister system, checking for proper seal -->
2. Evaporative Emission (EVAP) Canister Purge Regulator Valve 2 N333 , checking --> «EVAP Canister Purge Regulator Valve 2, Checking»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__evap-canister-purge-regulator-valve-2) .
3. Fuel system Leak Detection Pump (LDP) V144 , checking.
4. Erase DTC memory of Engine Control Module --> «Diagnostic Mode 04 - Erase DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-04-erase-dtc) , Diagnostic mode 4: Reset/erase diagnostic data.
5. Generate readiness code «Readiness code»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__readiness-code) .

Diagnostic Mode 09 - Read Vehicle Information

Diagnostic Mode 09 makes it possible to access vehicle-specific information from the ECM and the TCM (where applicable).

Note. Depending on scan tool and protocol used, Diagnostic Mode 09 and the information provided may be referred to by a different name.

Conditions

1. There must not be any DTCs stored in DTC memory --> «Diagnostic Mode 03 - Read DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-03-read-dtc) , Diagnostic mode 3: Check DTC memory.

Work Procedure

1. Connect diagnostic tester.
2. Switch ignition on.
3. Under address word 33, select "Diagnostic mode 9: Vehicle information".
4. Select desired vehicle information "Test-ID XX".

Display Vehicle Information

1. End diagnosis and switch ignition off.

Readiness Code

> Readiness Code, Reading

> Readiness Code, Generating

The readiness code is an 8 digit number block that indicates the results of an emission relevant On Board Diagnostic (OBD).

When the diagnostic for a system (e.g.: secondary air system) has run through successfully, the respective digit of the number block is set from 1 to 0.

Diagnostics are performed at regular intervals during normal vehicle operation. After repairing an emissions-related system, the readiness code should be generated via a road test to ensure that these systems are working according to specifications. If a malfunction is recognized during the diagnostic, it is stored in DTC memory.

The readiness code is erased every time the DTC memory is erased and every time the voltage supply is interrupted. For this reason, only erase DTC memory if there is a DTC stored in it.

Readiness Code, Reading

Requirements

1. There must not be any DTCs stored in DTC memory --> «Diagnostic Mode 03 - Read DTC Memory»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-mode-03-read-dtc) , Diagnostic mode 3: Check DTC memory.

Work Procedure

1. Connect diagnostic tester --> «Diagnostic Tester, Connecting»(/audi/a8/d3-2005-2007/remont/cooling-fan/#60l-12-cyl-4v-generic-scan-tool-engine-codes-bsb__diagnostic-tester-connecting) .
2. Start engine and let run at idle.
3. Under address word 33, select "Diagnostic mode 1: Check measured values".
4. Select desired measuring value "PID 01".