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Multiport Fuel Injection (mfi) - 4.2l v8 5v - Bbd Audi S6 C5

Step-by-step instructions on "Multiport Fuel Injection (mfi) - 4.2l v8 5v - Bbd" for Audi S6 C5 (2002–2003). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

126subsections
126articles
124illustrations

Safety precautions

1 article

When working on the fuel supply/injection system, carefully observe the following 6 cleanliness rules

1 article

Technical Data (A6 models)

1 article

Technical Data (S6 models)

1 article

Component locations overview

1 article

Wiring and component check with test box VAG 1598/31

1 article

Connecting test box VAG 1598/31

1 article

After installing the engine control module, perform the following operations

1 article

Motronic engine control module (ECM) -J220-, replacing

1 article

Removing engine control module

1 article

Installing engine control module

1 article

The following operations must be performed after installing the engine control module

1 article

Activating cruise control system

1 article

Deactivating cruise control system

1 article

Replacing engine control modules which are secured with a protective housing

1 article

The following tools are required

1 article

Procedure

1 article

After installing a new engine control module, it is essential to carry out the following steps

1 article

Test conditions

1 article

Checking idling speed

1 article

If the idling speed is too high or too low or not smooth and there are no DTCs recorded in the DTC memory, perform the following tests marked with a dot

1 article

Meaning of 5 digit readout of display group 56

1 article

Removing fuel manifold tube

1 article

Checking injectors for leaks

1 article

Checking injection quantity

1 article

Installation of the fuel manifold together with injectors is performed in the reverse sequence. The following points should be noted when installing

1 article

Electrical checks on injectors

1 article

Checking power supply

1 article

Fuel Pump (FP) relay -J17- and relay actuation, checking

1 article

Functional testing of fuel pump relay

1 article

Checking actuation of fuel pump relay

1 article

Checking actuation of fuel pump and components

1 article

Motronic Engine Control Module (ECM) power supply relay -J271-, checking

1 article

Check actuation of ECM power supply relay

1 article

Check the power supply

1 article

Checking wiring between power supply relay and engine control module

1 article

Check requirements

1 article

Evaluation of display group 4

1 article

Checking voltage supply from terminal 15 and terminal 30

1 article

Checking function

1 article

Evaluation of display group 002

1 article

Checking voltage supply to MAF sensor

1 article

Checking Ground connection

1 article

Checking wiring to MAF sensor

1 article

Intake Air Temperature (IAT) sensor -G42-, checking

1 article

Engine Coolant Temperature (ECT) sensor -G62-, checking

1 article

Checking wiring

1 article

Function of oxygen sensor control

1 article

Oxygen sensor control and Heated oxygen sensors -G39- and -G108- before catalytic converter, checking

1 article

Functional test

1 article

Meaning of 3 digit readout of display group 30

1 article

Checking oxygen sensor learned values and oxygen sensor control

1 article

If specification is not attained in display zone 1 or display zone 3, or if the value does not fluctuate by at least 2%

1 article

Evaluation of display group 32

1 article

Evaluation of display group 33

1 article

Test sequence

1 article

(cont.)

1 article

Test sequence for Heated Oxygen Sensor (HO2S) 2

1 article

Oxygen sensor control and Oxygen Sensors (02S) -G130- and -G131- behind Three Way Catalytic Converter (TWC), checking

1 article

Checking oxygen sensor control after catalytic converter

1 article

Evaluation of display groups 037 and 038

1 article

Oxygen sensor heating, checking

1 article

Checking voltage supply for oxygen sensor heating

1 article

Oxygen sensor signal wiring and actuation, checking

1 article

Checking oxygen sensor wiring, Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130

1 article

Checking oxygen sensor wiring, Heated Oxygen Sensor (HO2S) 2 -G108

1 article

Checking oxygen sensor wiring, Oxygen Sensor (O2S) 2 -G131- Behind Three Way Catalytic Converter (TWC)

1 article

Removing oxygen sensors before catalytic converter

1 article

Tightening torques

1 article

When installing, note the following points

1 article

Intake manifold change-over, checking (A6 models)

1 article

Intake manifold change-over, function

1 article

Intake Manifold Change-Over valve -N156- and Intake Manifold Tuning (IMT) valve 2 -N261-, checking

1 article

Checking voltage supply of intake manifold change-over valve/IMT valve 2

1 article

Checking actuation of intake manifold change-over valve/IMT valve 2

1 article

Checking solenoid valves for obstruction and leaks

1 article

Checking vacuum system for leaks

1 article

Intake manifold change-over, checking (S6 models)

1 article

Intake manifold change-over valve -N156-, checking

1 article

Checking voltage supply of intake manifold change-over valve

1 article

Checking actuation of intake manifold change-over valve

1 article

Checking valve for obstruction and leaks

1 article

In all S6 models a flap is switched in the air filter via the intake air switch-over valve -N335

1 article

Checking intake air switch-over valve -N335

1 article

Checking voltage supply to intake air switch-over valve -N335

1 article

Checking actuation of intake air change-over valve -N335

1 article

Checking vacuum system of intake air switch-over valve -N335- for leaks

1 article

VACUUM HOSE DIAGRAM(S)

1 article

Testing for leaks

1 article

Electrical check for Evaporative Emission (EVAP) canister purge regulator valve -N80

1 article

Checking solenoid valve voltage supply

1 article

Checking EVAP canister purge regulator valve actuation

1 article

Secondary Air Injection (AIR) solenoid valve -N112-, checking

1 article

Secondary Air Injection (AIR) pump relay -J299-, checking

1 article

Checking voltage supply of secondary air injection pump relay

1 article

Checking actuation of secondary air injection pump relay

1 article

Function of the electronic throttle system

1 article

The following components are located in the housing of the throttle valve control module

1 article

Throttle valve control module, adaptation

1 article

Test conditions for adaptation of the throttle valve control module

1 article

Notes

1 article

Angle sensor -1- for throttle drive (power accelerator actuation) -G187- and Angle sensor -2- for throttle drive (power accelerator actuation) -G188-, checking

1 article

Checking the voltage supply to the throttle valve control module

1 article

Checking wiring for voltage, signal and actuation

1 article

Throttle Position (TP) sensor -G79- and Sender 2 for accelerator pedal position -G185-, checking

1 article

Checking voltage supply for TP sensor/Sender 2 for accelerator pedal position

1 article

Checking signal wiring and wiring connections between TP sensor/Sender 2 for accelerator pedal position and engine control module

1 article

Kick down switch point, checking

1 article

Brake light switch -F- and Brake pedal switch -F47-, checking

1 article

Meaning of 4 digit readout of display zone 2

1 article

Clutch vacuum vent valve switch -F36-, checking

1 article

Crash signal, checking

1 article

Engine speed signal, checking

1 article

Air conditioner compressor shut-off, checking

1 article

Engine mountings, checking

1 article

Checking voltage supply of engine mountings

1 article

Checking actuation of engine mountings

1 article

Consumption signal, checking

1 article

Speed signal, checking

1 article

If the vehicle speed is not indicated.

1 article

Fuel level signal, checking

1 article

Exchange of data between connected control modules, checking

1 article

Testing the bus system

1 article

Automatic test sequence

1 article

Checking a "two-line bus system"

1 article

If cause of malfunction "Data bus drive faulty" cannot be found in bus lines check whether one of the control modules is responsible.

1 article