Volkswagen Golf Service & Repair Manual: Separating control unit from hydraulic unit
| Special tools and workshop equipment
required |
| If a control unit is defective, separate it from the
hydraulic unit and renew only the control unit. |
| If the hydraulic unit is defective, the hydraulic unit must
be renewed together with the control unit. |
| To separate the control unit from the hydraulic unit, the
ESP unit must be removed first. |
Risk of damage to hydraulic unit caused by removal of the return flow
pump.Never detach the return flow pump from the hydraulic unit.Risk of
damage to control unit caused by static charge and dirt.Discharge any
static charge: touch an ESD workplace.Protect interior of control unit
from moisture and dirt.
| – |
Before working on electric components, touch an earthed
object, ESD workplace -VAS 6613-. Do not directly touch
connector contacts or electronic components. |
| – |
Lay down hydraulic unit together with control unit on ESD
workplace -VAS 6613-. |
| – |
Unscrew the 3 Torx bolts from control unit and lay them
aside immediately (to avoid interchanging with the new Torx
bolts). |
| – |
Set hydraulic unit with control unit facing upwards on ESD
workplace -VAS 6613-. |
|
|
|
| – |
Taking care not to cant control unit, pull it off hydraulic
unit. |
| – |
Cover control unit solenoids with a lint-free cloth. |
| – |
Check cleanliness of hydraulic unit sealing surface; clean
with methylated spirits and a lint-free cloth if necessary. |
| The sealing surface of the hydraulic unit may not be worked
with a file, metal scraper, sandpaper or similar. |
| If the sealing surface of the hydraulic unit is damaged
(e.g. scoring, scratches), the hydraulic unit must be renewed
together with the control unit. |
| The seal of the control unit may not be pulled out or
raised. |
| The seal of the control unit cannot be renewed. |
|
|
|
Special tools and workshop equipment required
Torque wrench -V.A.G 1331-
Torque wrench -V.A.G 1410-
Brake pedal depressor -V.A.G 1869/2- ...
Special tools and workshop equipment
required
ESD workplace -VAS 6613-
Torque screwdriver -V.A.G 1624-
...
Other materials:
Removing and installing gas discharge bulb control unit -J343-/-J344-
WARNING
Risk of death due to high voltage! Risk of injury
and environmental pollution!
Observe operation and safety notes for gas discharge
bulbs
→ Chapte ...
Vibration, vibration control system
Using the vibration control system -VAS 6230 A- you can
perform more functions than just stationary balancing.
A special feature of this system is the testing of the
radial force of the wheel and tyre while rolling.
A ro ...
Removing tyre sealant
Place wheel on an even surface.
–
Unscrew valve insert.
Caution
The tyre sealant is hazardous to the health.
May cause eye and skin irrit ...
© 2016-2026 Copyright www.vwgolf.org
Removing and installing control unit and hydraulic unit, RHD vehicles
Fitting control unit to hydraulic unit