Component locations, overview

WARNING: This page is about a different variant/trim than selected.

Components A to C are not shown on the illustration.

A - Brake Pedal Switch F47 * and Brake Light Switch F *

Together in one housing in footwell on brake pedal
Checking → Brake light switch F and Brake Pedal Switch F47 , checking

B - Throttle Position (TP) Sensor G79 *

In footwell on accelerator
Checking: → 20 - FUEL SUPPLY

C - Clutch Vacuum Vent Valve Switch F36

In footwell on clutch pedal
Checking → Clutch Pedal Switch F36 , checking

Fig 1: Diesel-Direct Fuel Injection System Component Locations

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1 - Exhaust gas recirculation (EGR) valve

Checking: → 26 - EXHAUST SYSTEM, EMISSION CONTROLS

2 - Change-over Valve for Intake Manifold Flap N239 *

3 - Positive Crankcase Ventilation (PCV) Heating Element N79

Check voltage supply for N79 between terminals 1 and 2 of the connector with ignition switched on; Specification: At least 11.5 V

4 - Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248 *

Checking voltage supply → Diesel fuel injection components and functions, checking
Replace → Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248 , replacing
Coding → Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248 , coding
Checking altitude sensor F96 → Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96 , checking , Checking intake manifold pressure and altitude sensor

5 - Connector

Release to disconnect
Only disconnect or connect with ignition switched off

6 - Exhaust gas recirculation valve N18 */**

Checking: → 26 - EXHAUST SYSTEM, EMISSION CONTROLS

7 - Injector

For No. 3 cylinder with Needle Lift sensor G80 *

8 - Wastegate Bypass Regulator Valve N75 */**

Checking: → 21 - TURBOCHARGER, G-CHARGER

9 - Mass Air Flow (MAF) sensor G70 *

Checking → Mass Air Flow (MAF) sensor G70 , checking

10 - Engine Coolant Temperature (ECT) Sensor G62 *

For engine control module
With ECT sensor G2
If necessary release pressure in cooling system before removing
Checking → Engine Coolant Temperature (ECT) sensor G62 , checking

Wiring chamber 3 and wiring chamber 4 for G62

11 - Vacuum Reservoir

12 - 10 Nm

13 - Engine Speed (RPM) Sensor G28 *

Checking → Engine Speed (RPM) Sensor G28 , checking

14 - O-ring

Replace

15 - 2 pin connector

Brown
For Needle Lift Sensor G80

16 - 3 pin connector

For engine speed sensor G28

17 - 10 pin connector

Black
For Fuel Temperature Sensor G81
For Cold Start Injector N108
For Fuel Cut-off Valve N109

For Quantity Adjuster N146
For Modulating Piston Displacement Sensor G149

18 - Cold Start Injector N108 */**

Checking injection timing control range → Diesel injection timing control range, checking

19 - Fuel Cut-off Valve N109 */**

20 - Injection pump quantity adjuster

With Fuel Temperature Sensor G81 *
With Quantity Adjuster N146 *
With Modulating Piston Displacement Sensor G149 *

21 - Manifold Absolute Pressure (MAP) Sensor G71 * and Intake Air Temperature (IAT) Sensor G72 *

Checking intake manifold pressure sensor → Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96 , checking , Checking intake manifold pressure sensor and altitude sensor
Checking intake manifold temperature sensor → Checking intake manifold temperature sensor