Content .. 433 434 435 436 ..

Volkswagen Golf Variant / Jetta. Manual - part 435

Valve - N276- -arrow-.

– Counterhold at the housing hex bolt and loosen the union nut.

Then remove it by hand.

– Extract the contamination from the rail element bore (threads

and sealing surface). Do not use mechanical tools.

Note

Seal the rail element bore immediately with a suitable plug to pre‐

vent contaminants from entering.

Installing:

Note

♦

Check the Fuel Pressure Regulator Valve - N276- sealing sur‐

face and threads for damage.

♦

Check the sealing surface on the rail element bore.

♦

The threads on the Fuel Pressure Regulator Valve - N276-

must be free of oil and grease.

– First tighten the union nut on the Fuel Pressure Regulator

Valve - N276- by hand.

– Align the Fuel Pressure Regulator Valve - N276- so the con‐

necting line is not taut after connecting the electrical connec‐

tor.

– Counterhold at the housing hex bolt and tighten the union nut:
• Tightening specification -item 6-

⇒ Item 6 (page 313)

– After installing, let the engine run at a moderate speed for a

few minutes and then stop it.

– Check the fuel system for leaks. Refer to

⇒ “3.10 Fuel System, Performing Leak Test”, page 329

– Read the DTC memory for the Engine Control Module - J623-

again. Refer to Vehicle Diagnostic Tester in “Guided Func‐

tions”.

– Install the engine cover. Refer to

⇒ “1.4 Engine Cover, Removing and Installing”, page 90

3.7

Fuel Pressure Sensor - G247- , Remov‐

ing and Installing

Function
The Fuel Pressure Sensor - G247- (rail pressure sensor) is loca‐

ted in the rail element (high pressure reservoir). It measures the

current fuel pressure in the high pressure system and delivers a

voltage signal to the Engine Control Module - J623- .
If the Fuel Pressure Sensor - G247- malfunctions, the pressure is

controlled via an Engine Control Module - J623- characteristic

map (maximum engine speed is limited to approximately 3000

RPM in emergency operation mode).
Special tools and workshop equipment required
♦ Torque Wrench 1332 40-200Nm - VAG1332-

3. Diesel Direct Injection System

323

♦ Follow the safety precautions when working on the diesel

direct fuel injection system. Refer to

⇒ “1 Safety Precautions when Working on Diesel Direct

Fuel Injection System”, page 303

♦ Pay attention to the guidelines for clean working condi‐

tions. Refer to

⇒ “2 Guidelines for Clean Working Conditions”,

page 305

Always pay attention to these instructions before and during

work.

Removing:
– Remove the engine cover. Refer to

⇒ “1.4 Engine Cover, Removing and Installing”, page 90

– Before removing, clean the threaded area around the Fuel

Pressure Sensor - G247- (for example using commercially

available coolant). Contamination must not enter the bore in

the rail element (high pressure reservoir).

Note

Clean carefully, cleaner must not enter the connector.

– Dry the Fuel Pressure Sensor - G247- .

324

G247- -C-.

– Remove the Fuel Pressure Sensor - G247- .
– Extract the contamination from the rail element bore (threads

and sealing surface). Do not use mechanical tools.

Note

Seal the rail element bore immediately with a suitable plug to pre‐

vent contaminants from entering.

Installing:

Note

♦

Check the Fuel Pressure Sensor - G247- sealing surface and

threads for damage.

♦

Check the sealing surface on the rail element bore.

♦

The Fuel Pressure Sensor - G247- threads are coated with an

anti-friction coating so they must be free of oil and grease.

– First tighten the Fuel Pressure Sensor - G247- by hand.
– Tighten the Fuel Pressure Sensor - G247- :
• Tightening specification -item 14-

⇒ Item 14 (page 313)

– After installing, let the engine run at a moderate speed for a

few minutes and then stop it.

– Check the fuel system for leaks. Refer to

⇒ “3.10 Fuel System, Performing Leak Test”, page 329

– Read the DTC memory for the Engine Control Module - J623-

again. Refer to Vehicle Diagnostic Tester in “Guided Func‐

tions”.

– Install the engine cover. Refer to

⇒ “1.4 Engine Cover, Removing and Installing”, page 90

3.8

High Pressure Fuel Pump, Removing

and Installing

Special tools and workshop equipment required
♦ Counterhold - Camshaft Gear - T10051-
♦ Union Nut Socket - T40055-
♦ Puller - Pulley - T40064-
♦ Puller - Pulley - Pressure Pad - T40064/1-
♦ Torque Wrench 1331 5-50Nm - VAG1331-
♦ Torque Wrench 1331 Insert - Reversible Ratchet -

VAG1331/1-

♦ Hose Clip Pliers - VAS6362-
♦ Engine Bung Set - VAS6122- (not illustrated)

3. Diesel Direct Injection System

325