Volkswagen Golf / Golf GTI / Golf Variant. Manual — part 722
– Remove the shear bolt -1- with a screwdriver -2-.
– Remove the protective housing from the Engine Control Mod‐
ule - J623- .
– Release the retainers in direction of -arrow A- and remove the
Engine Control Module - J623- in direction of -arrow B-.
– Unlock and disconnect the connectors from the Engine Con‐
trol Module - J623- .
Installing
Install in reverse order of removal. Note the following:
– Place the Engine Control Module - J623- in the bracket with
the lower edge forward in direction of -arrow A- and locked on
the upper edge.
– Engine Control Module - J623- must be installed again with
protective housing.
– Clean any locking fluid still in the threaded holes for the shear
bolt. Cleaning can be performed with a thread cutter (tap).
– Always use new shear bolts.
– Connect the battery. Refer to ⇒ Electrical Equipment; Rep.
Gr. 27 ; Battery; Battery, Disconnecting and Connecting .
Perform the Following after Installing a New ECM
– Turn on the ignition and select the following menu items on the
Vehicle Diagnostic Tester :
♦
01 - Engine Electronics
♦
Guided Functions
♦
01 - Engine Control Module Replacing
7
High Pressure Pump
⇒ “7.1 Overview - High Pressure Pump”, page 325
.
⇒ “7.2 High Pressure Pump, Removing and Installing”,
7.1
Overview - High Pressure Pump
⇒ “7.1.1 Overview - High Pressure Pump, Vehicles without Intake-
Manifold Fuel Injection”, page 325
.
7.1.1
Overview - High Pressure Pump, Vehi‐
cles without Intake-Manifold Fuel Injec‐
tion
CAUTION
Fuel system is under high pressure.
Risk of injury from fuel spraying out.
– Reducing the fuel high pressure.
1 - Connector
❑ For Fuel Pressure Reg‐
ulator Valve - N276-
2 - High Pressure Pump Bolt
❑ 8 Nm + 90° turn
❑ Replace after removing
❑ Tighten by hand
3 - High Pressure Pump
❑ There is an electric fuel
pump located in the fuel
tank that supplies the
fuel to the mechanical
high pressure pump.
❑ When installing, make
sure that no dirt enters
the fuel system.
❑ The fuel system must be
without pressure, re‐
lease fuel pressure. Re‐
fer to
.
❑ Install the fuel lines free
of tension
❑ Inspect the O-ring, and
replace if damaged
❑ With Fuel Pressure
Regulator Valve - N276-
❑ Removing and instal‐
ling. Refer to
.
4 - O-Ring
❑ Replace if damaged
5 - Roller Tappet
❑ Remains inserted in the vacuum pump after removing the high pressure pump
6 - High Pressure Pump Bolt
❑ 8 Nm + 90° turn
❑ Replace after removing
❑ Tighten by hand
7 - Fuel Supply Line Connection
❑ 30 Nm
❑ Replace after removing
❑ When loosening the high pressure line, secure the connection from turning.
8 - Fuel Supply Line
❑ 27 Nm
❑ For the fuel injector fuel rail
❑ Lubricate the fuel supply line ball with engine oil
❑ Install fuel supply line free of stress
9 - Spring Clamp
❑ Replace if damaged
10 - Fuel Supply Line
❑ Coming from the fuel tank
7.1.2
Overview - High Pressure Pump, Vehi‐
cles with Intake-Manifold Fuel Injection
CAUTION
Fuel system is under high pressure.
Risk of injury from fuel spraying out.
– Reducing the fuel high pressure.
1 - High Pressure Pump Bolts
❑ 20 Nm
❑ Replace after removing
❑ Tighten uniformly
2 - Fuel Pressure Regulator
Valve - N276-
3 - Connector
❑ For Fuel Pressure Reg‐
ulator Valve - N276-
4 - High Pressure Pump
❑ There is an electric fuel
pump located in the fuel
tank that supplies the
fuel to the mechanical
high pressure pump.
❑ When installing, make
sure that no dirt enters
the fuel system.
❑ The fuel system must be
without pressure, re‐
leasing fuel pressure.
Refer to
❑ Install the fuel lines free
of tension
❑ Inspect the O-ring, and
replace if damaged
❑ Removing and instal‐
ling. Refer to
5 - O-Ring
❑ Replace if damaged
6 - Roller Tappet
❑ Installation position: the roller points to the camshaft
❑ Remains inserted in the vacuum pump after removing the high pressure pump
7 - Fuel Line Connections
❑ 20 Nm
8 - Spring Clamp
❑ Replace after removing
9 - Fuel Line
❑ To the fuel rail intake manifold fuel injectors
10 - High Pressure Line
❑ 20 Nm
❑ To the combustion chamber fuel injectors fuel rail
❑ Lubricate the high pressure line with engine oil
❑ Do not install the high pressure line with tension. Make sure it is clean.
11 - High Pressure Line Connection
❑ 30 Nm
❑ When loosening the high pressure line, secure the connection from turning.
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