Get Motronic MED 9.1.1 Guide for Volkswagen Vento 4 Door First Generation (2010-2022)

Motronic MED 9.1.1

Bosch Motronic MED 9.1.1 is used in the 4.2 Liter 4V

V8 FSI engine, which powers theTouareg II.

The major differences between Bosch Motronic

MED 9.1 and 9.1.1 are related to the fundamental

differences between the V6 and V8 engines in which

the systems are used.

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Motronic MED 9.1.1

System Overview (4.2 Liter 4VV8 FSI Shown)

Sensors

Mass Air Flow (MAF) Sensors, G70, G246

Intake AirTemperature (IAT) Sensor G42

Engine Speed (RPM) Sensor G28

Throttle Position (TP) Sensors G79, G185

Camshaft Position (CMP) Sensors G40, G163, G300, G301

Data Link Connector

Throttle Valve Control Module J338

Throttle Drive Angle Sensors (for Electronic Power

Control [EPC]) G187, G188

Intake Manifold Runner Position Sensors G336, G512

Low Fuel Pressure Sensor G410

Engine Control

Module J623

Fuel Pressure Sensor G247

Engine CoolantTemperature (ECT) Sensor G62

CAN Drive Bus

Engine CoolantTemperature (ECT) Sensor (on Radiator) G83

Knock Sensors G61, G66, G198, G199

Oxygen Sensors G39, G108

Oxygen Sensors G130, G131

Brake Light Switch F

Brake Pedal Switch F47

Brake Booster Pressure Sensor G294

Additional Input Signals

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Motronic MED 9.1.1

Actuators

Motronic Engine Control Module (ECM) Power Supply Relay J271

Fuel Pump (FP) Control Module J538

Transfer Fuel Pump (FP) G6

Fuel Metering Valves N290, N402

Cylinder Fuel Injectors 1 through 8 N30-33, N83-N86

Evaporative Emission Canister Purge Regulator Valve N80

Throttle Valve Control Module J338

Throttle Drive (for Electronic Power Control [EPC]) G186

Intake Flap Motor V157

Variable Intake Manifold Runner Motor V183

Camshaft Adjustment Valves (Intake) N205, N208

Camshaft Adjustment Valves (exhaust) N318, N319

Ignition Coils with Power Output Stages

N70, N127, N291, N292, N323-N326

Map Controlled Engine CoolingThermostat N265

Coolant Circulation Pump Relay J151

Recirculation Pump V55

Oxygen Sensor (O2S) Heaters Z19, Z28

Oxygen Sensor (O2S) Heaters [behindThree Way Catalytic

Converter (TWC)] Z29, Z30

Secondary Air Injection (AIR) Pump Relay J299

Secondary Air Injection (AIR) Pump Motor V01

Coolant Fan Control (FC) Control Module J293

Coolant Fan V7

Coolant Fan Control (FC) Control Module 2 J671

Coolant Fan 2 V177

Brake Booster Relay J569

Brake System Vacuum Pump V192

Additional Output Signals

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Motronic MED 9.1.1

Sensors

Intake Manifold Runner Position

Sensors G336 and G512

Intake Manifold Runner

Position Sensor 2 G512

The two intake manifold ﬂap potentiometers are

secured to the intake manifold and are connected to

the shaft for the intake manifold ﬂaps. They recognize

the position of the intake manifold ﬂaps.

Signal Use

The position is important because intake manifold

changeover affects air ﬂow in the combustion

chamber and the inlet air mass. The position of the

intake manifold ﬂaps is therefore relevant to the

exhaust gas, and must be checked via self-diagnosis.

Effects of Signal Failure

If the signal from the position sensor fails, the

position of the intake manifold ﬂaps at the time of

failure and the relevant ignition timing are used as

substitute values. Power and torque are reduced and

fuel consumption increases.

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Intake Manifold Runner

Position Sensor G336

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Motronic MED 9.1.1

Actuators

Variable Intake Manifold Runner

MotorV183

Variable Intake Manifold

Runner Motor V183

The variable intake manifold motor is bolted to the

intake manifold.

Task

The motor is actuated by Engine Control Module

J623 depending on engine load and speed. The

motor actuates the change-over ﬂaps via a shaft and

switches to the torque (long runners) or the output

position (short runners).

Effects in the Event of Failure

If the Variable Intake Manifold Runner Motor V183

fails, intake manifold change-over is no longer

possible. The intake manifold remains in the position

in which the change-over ﬂaps were located at the

time of failure. Power and torque are reduced.

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Motronic MED 9.1.1

Intake Flap MotorV157

The Intake Flap Motor V157 is bolted to the variable

intake manifold.

Intake Flap

Motor V157

Task

The motor is actuated by Engine Control Module

J623 depending on engine load and speed. Using two

operating rods, it adjusts four intake manifold ﬂaps

per cylinder bank.

If these are actuated, they close part of the intake

port in the cylinder head. This leads to circular air

movement in the cylinder head and improves mixture

formation.

Effects in the Event of Failure

If the Intake Flap Motor V157 fails, the intake manifold

ﬂaps can no longer be actuated. This leads to a

deterioration in combustion and a reduction in output

and torque. The fuel consumption also increases.

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Camshaft Adjustment Valve 2

N208 (Intake)

Intake Camshaft AdjustmentValves

N205 and N208

Exhaust Camshaft Adjustment

Valves N318 and N319

Except for the addition of N208 and N319, these

perform the same functions with the same

parameters as in Motronic MED 9.1.

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Camshaft Adjustment Valve 2

N319 (Exhaust)

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Motronic MED 9.1.1 for Your Volkswagen Vento 4 Door First Generation (2010-2022)

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