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:
Assembly overview - fuel delivery unit/fuel gauge sender, vehicles with
auxiliary heater
1 -
Fuel delivery unit
With fuel system pressurisation pump -G6-.
With integrated fuel filter; fuel filter cannot be renewed
separately
Carrying out electrical test of fuel pump in
Guided fault finding mode → ...
Effects on metal
In its pure state, refrigerant R134a is chemically stable
and does not attack iron or aluminium.
However, impurities such as chlorine compounds in the
refrigerant do attack certain metals and plastics. This can lead
to blockages, leaks a ...
Notes for vehicles with start-stop system
Observe the safety precautions for vehicles with a
start-stop system
→ Chapter.
If a start-stop system is installed, the following abort
conditions will deactivate the start-stop function:
The star ...
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Removing and installing control unit and hydraulic unit, RHD vehicles
Fitting control unit to hydraulic unit