Get Motronic MED 17.5 Guide for Volkswagen Vento 4 Door First Generation (2010-2022)

Motronic MED 17.5

Bosch Motronic MED 17.5 is used in the 2.0L chain-

drivenTSI engine. This 4-cylinder turbocharged engine

is available in many Volkswagen vehicles.

Features of the MED 17.5 Engine Management

system include:

• MED 17.5 ECM

• Hot-ﬁlm air mass ﬂow with integral temperature

sensor

• Throttle valve with contactless sensor

• Map-controlled ignition with cylinder-selective,

digital knock control

• Single-spark ignition coils

384_003

47

Motronic MED 17.5

System Overview (2.0L Chain-DrivenTSI)

Sensors

Mass Air Flow (MAF) Sensor G70

Intake AirTemperature (IAT) Sensor G299

Engine CoolantTemperature (ECT)

Sensor (on Radiator) G83

Engine CoolantTemperature (ECT) Sensor G62

Change Air Pressure Sensor G31

Engine Speed (RPM) Sensor G28

Camshaft Position (CMP) Sensor G40

Engine Control Module

(ECM) J623 with

Ambient Pressure Sensor

Throttle Valve Control Module J338

Throttle Drive Angle Sensor 1 G187

Throttle Drive Angle Sensor 2 G188

Throttle Position (TP) Sensor G79

Accelerator Pedal Position Sensor 2 G185

Brake Pedal Switch F63

Clutch Position Sensor G476

Data Bus On Board

Diagnostic Interface J533

Fuel Pressure Sensor G247

Intake Manifold Runner Position Sensor G336

Instrument Cluster

Control Module J285

Knock Sensor (KS) 1 G61

Heated Oxygen Sensor (HO2S) G39

Oxygen Sensor (O2S) 2 BehindThree Way Catalytic

Converter (TWC) G131

Oil LevelThermal

Sensor G266

DFM Generator, Cruise Control ON/OFF

48

Motronic MED 17.5

Actuators

Motronic Engine Control Module (ECM) Power Supply Relay J271

Engine Component Power Supply Relay J757

Intake Manifold Runner Control (IMRC) Valve N316

Wastegate Bypass Regulator Valve N75

Fuel Pressure Regulator Valve N276

Fuel Pump (FP) Control Module J538

Transfer Fuel Pump (FP) G6

Cylinder Fuel Injectors 1-4 N30-N34

Ignition Coils with Power Output Stages N70, N127, N291, N292

Diagnostic Link

Connector

Throttle Valve Control Module J338

Throttle Drive for Electronic Power Control (EPC) G186

Evaporative (EVAP) Emission Canister Purge Regulator Valve N80

Oxygen Sensor (O2S) Heater Z19

Coolant Circulation Pump Relay J151

After-Run Coolant Pump V51

Camshaft Adjustment Valve 1 N205

Radiator Fan Setting 1, PWM Signal Actuators Leak

Detection Pump V144

384_054

49

Motronic MED 17.5

Engine Control Module

The 2.0LTSI engine uses the Bosch MED 17.5 ECM.

The hardware and software components have been

developed for future projects both for gasoline and

diesel engine applications. This allows maximum

use with regard to functions and vehicle interfaces

independent of the engine combustion conﬁguration.

Examples of this include the Electronic Pedal Control

and radiator fan activation strategies.

The new IFXTricore processor family has

enough reserve capacity to accommodate future

advancements to meet market requirements.

Hardware in the engine control module:

• Inﬁneon IFX Tricore 1766 (Leda Light)

• 80 MHz System Frequency

• 1.5 MByte Internal Flash

• Single Chip System

50

Motronic MED 17.5

Oxygen Sensor Control

A new feature of the MED 17.5 is the deletion of the

continuous-duty oxygen sensor. Now, a nonlinear

oxygen sensor is installed. The sensor is located

between the close-coupled pre-catalyst and the

underbody catalytic converter.

The function of the continuous-duty pre-cat sensor

has been mapped by the new functions of the engine

control module.These maps are generated by conducting

appropriate tests during engine development.

Advantages:

• Fewer potential sources of fault

• More cost-effective

• Requirements of ULEV are met without

continuous-duty oxygen sensor

• No adjustments needed in customer service or for

exhaust emission inspections

51

Motronic MED 17.5

Substitute Functions in Case of Sensor/Actuator Failure

Symptom in

Case of Failure

Substitute

Signal

Power Emergency

Limitation Operation

DTC Entry

MIL

EPC

No Cruise

Control

F63

Yes

No

G39

G61

G62

No Control

Yes

No

Yes

No

Yes

No

Yes

Radiator

Fan Runs

G83

No

Permanently in

Setting 1

No Throttle

Response

G79/G185

Yes

No

Yes

No Throttle

Response

G187/G188

G247

G336

No High Pressure

No

Yes

No

Yes

No

Yes

No

No Cruise

Control

G476

Yes

No

No Power Supply

to ECM –

J271

No

Engine Not

Running

J538

J757

No

Yes

No

No High Pressure

Yes

Engine Not

Running

Smoothly

Ignition

Coils

Yes

No

Yes

Engine Not

Running

Smoothly

N30-N33

N75

No

Yes

No

Yes

No

Yes

No

N205

N276

N316

No

No High Pressure

No

Yes

No

Yes

No

Yes

No

This table refers to generally occurring faults. It is not a substitute for diagnosing with the

“Guided Fault Finding” function. The parameters speciﬁed in the table are subject to deviation

depending on fault type. Speciﬁcations are subject to change due to updating of ECM software.

52

Motronic MED 17.5 for Your Volkswagen Vento 4 Door First Generation (2010-2022)

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