Volkswagen Golf / Golf GTI / Golf Variant. Service manual - part 734

00 – General, Technical Data

1

Safety Precautions

(Edition 01.2016)

⇒ “1.1 Safety Precautions when Working on Fuel Supply System”,

page 1
⇒ “1.2 Safety Precautions during Road Test with Testing Equip‐

ment”, page 1
⇒ “1.3 Safety Precautions when Working on Vehicles with Start/

Stop System”, page 2

1.1

Safety Precautions when Working on

Fuel Supply System

Caution

There is a risk of injury due to the fuel being under pressure.
The fuel system is under pressure. Injuries are possible from

fuel spraying out.
Before opening the fuel system:

– Wear protective eyewear.
– Wear safety gloves.
– Reduce the pressure: place clean cloths around the connec‐

tion point and carefully open the connection point.

Procedure for reducing the high fuel pressure. Refer to ⇒  Rep.

Gr.  24 ; Fuel Injection System; High Fuel Pressure, Reducing .

Caution

Risk of a fire due to leaking fuel.
When the battery is connected, the door contact switch acti‐

vates the fuel pump when opening the driver door. Leaking fuel

can ignite and start a fire.

– Before opening the fuel system, interrupt the power supply to

the fuel pump.

1.2

Safety Precautions during Road Test

with Testing Equipment

WARNING

There is a risk of injury caused by unsecured testing equip‐

ment.
If the front passenger airbag deploys during an accident, un‐

secured testing equipment becomes a dangerous projectile.

– Secure the testing equipment on the rear seat.
or

– Have a second technician operate the testing equipment on

the rear seat.

1.3

Safety Precautions when Working on

Vehicles with Start/Stop System

WARNING

There is a risk of injury due to the engine starting unexpectedly.
The engine can start unexpectedly on vehicles with an activa‐

ted Start/Stop System. A message in the instrument cluster

indicates whether the Start/Stop System is activated.

– Deactivate the Start/Stop System: switch off the ignition.

2

Identification

⇒ “2.1 Engine Number/Engine Characteristics”, page 3

2.1

Engine Number/Engine Characteristics

Codes

CXBA

CXBB

CNSA

CNSB

Emissions values

SULEV

SULEV

SULEV

SULEV

Displace‐

ment

liter

1.8

1.8

1.8

1.8

Output

kW

125

125

125

125

RON

95 unleaded

95 unleaded

95 unleaded

95 unleaded

Codes

CXCA

CNTA

CXCB

Emissions values

SULEV

SULEV

SULEV

Displacement

liters

2.0

2.0

2.0

Output

kW

162

155

162

Research Octane Number

(RON)

95 unleaded

95 unleaded

95 unleaded

1

1)

 Starting 2016 91 RON

3

General Information

⇒ “3.1 Parking/Auxiliary Heater and Fuel System Clean Working

Conditions”, page 4

3.1

Parking/Auxiliary Heater and Fuel Sys‐

tem Clean Working Conditions

Special tools and workshop equipment required
♦ Engine Bung Set - VAS6122-
Follow these five “rules” when working on the fuel supply/injector

system:
♦ Thoroughly clean the connecting points and the surrounding

area before loosening.

♦ Place the removed parts on a clean surface and cover them.

Only use lint-free cloths!

♦ Carefully cover or seal opened components if the repair will

not be done immediately.

♦ Only install clean parts: remove replacement parts from the

packaging immediately prior to installation. Do not use parts

that have been stored loose (for example, in tool boxes etc.).

♦ When the system is open: do not work with compressed air.
♦ Do not move vehicle.
♦ Seal off any open lines and connections immediately with

plugs, for example, take from -VAS6122- .

♦ Protect the disconnected connectors from dirt and moisture

and only connect when they are dry.