Overview of component locations

The following components are not depicted in the component locations overview ( Fig 1 ): 

Throttle Position (TP) Sensor -G79-and Sender -2- for accelerator pedal position - G185-* 

• In footwell, at accelerator pedal
• Checking, see THROTTLE POSITION (TP) SENSOR, CHECKING

The following components are displayed in the Component location overview. See  Fig 1 

1. EGR Vacuum Regulator Solenoid Valve 
   • Checking, see EGR VACUUM REGULATOR SOLENOID VALVE, CHECKING
2. Change -over valve for intake manifold flap -N239- 
   • Checking, see CHANGE-OVER VALVE FOR INTAKE MANIFOLD FLAP, CHECKING 
3. Positive Crankcase Ventilation (PCV) Heating Element -N79- 
   • Check voltage supply for PCV heating element between terminals 1 and 2 of connector with ignition switched on

   Specified value: at least 11.5 V

4. Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-* 
   • Checking voltage supply, see CONTROL MODULE FOR DIESEL- DIRECT FUEL INJECTION SYSTEM 
   • Replace, see CONTROL MODULE FOR DIESEL-DIRECT FUEL INJECTION SYSTEM, REPLACING 
   • Checking Barometric Pressure (BARO) Sensor -F96-*, see MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR AND BAROMETRIC PRESSURE (BARO) SENSOR, CHECKING 
5. Connector 
   • disengage to pull off
   • Switch ignition off before disconnecting or connecting connector
6. EGR Vacuum Regulator Solenoid Valve -N18-* 
   • Checking, see CHECKING EGR VACUUM REGULATOR SOLENOID VALVE
7. Fuel injector 
   • Removing and installing, see INJECTORS, REMOVING AND INSTALLING 
   • Checking, see INJECTORS, CHECKING 
   • For cylinder 3 with needle lift sensor
   • Check Needle Lift Sensor -G80-*, see NEEDLE LIFT SENSOR, CHECKING 
8. Wastegate Bypass Regulator Valve - N75-* 
   • Checking, see BOOST PRESSURE SYSTEM, CHECKING
9. Mass Air Flow (MAF) Sensor -G70-* 
   • Checking, see MASS AIR FLOW (MAF) SENSOR, CHECKING 
10. Engine Coolant Temperature (ECT) Sensor -G62-* 
    • For control module for Diesel -Direct Fuel Injection System
    • with Engine Coolant Temperature (ECT) Sensor -G2-
    • If necessary, release pressure in cooling system before removing. Checking, see ENGINE COOLANT TEMPERATURE (ECT) SENSOR, CHECKING 
11. Vacuum reservoir 
12. 10 Nm 
13. Engine Speed (RPM) Sensor -G28-* 
    • Checking, see COMPONENTS AND FUNCTIONS, CHECKING 
14. O-ring 
    • replace
15. 2-pin harness connector 
    • brown
    • For Needle Lift Sensor -G80-
16. 3-pin harness connector 
    • for Engine Speed (RPM) Sensor - G28-
17. 10-pin harness 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, see COLD START INJECTOR, CHECKING 
19. Fuel Cut-off Valve -N109- 
20. Injection pump quantity adjuster 
    • With Fuel Temperature Sensor -G81- *,Checking, see FUEL TEMPERATURE SENSOR, CHECKING 
    • With Quantity Adjuster -N146- *,Checking, see MODULATING PISTON DISPLACEMENT SENSOR AND QUANTITY ADJUSTER, CHECKING 
    • With Modulating Piston Displacement Sensor -G149-*,checking, see MODULATING PISTON DISPLACEMENT SENSOR AND QUANTITY ADJUSTER, CHECKING 
21. Manifold Absolute Pressure (MAP) Sensor -G71-* and Intake Air Temperature (IAT) Sensor -G72- 

• Checking Manifold Absolute Pressure (MAP) Sensor, see MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR AND BAROMETRIC PRESSURE (BARO) SENSOR, CHECKING 
Fig 1: 1.9L TDI Component Locations
Courtesy of VOLKSWAGEN OF AMERICA, INC.