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. |
| Return flow pump must not be separated from hydraulic unit. |
| Printed circuit board is exposed when control unit is
removed. |
| Neither moisture nor particles of dirt may enter the
interior of the control unit. |
| Avoid electrostatic charge! |
| This electrostatic charge can cause malfunctions if you
touch electric components. |
| – |
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. |
|
|
|
On hydraulic unit:
1 -
From hydraulic unit to rear left brake caliper.
-
Identification: Ш 5. ...
Special tools and workshop equipment
required
ESD workplace -VAS 6613-
Torque screwdriver -V.A.G 1624-
...
Other materials:
Renewing crankshaft oil seal - belt pulley end
Special tools and workshop equipment
required
Assembly tool -T10485-
Puller hooks -T20143-
Procedure
...
Purging (cleaning) refrigerant circuit with refrigerant R134a
Vehicles with high-voltage system (hybrid vehicles)
Observe the additional warning instructions for working on
vehicles with high-voltage system
→ Electrical system; Rep. gr.93.
...
System limits
First read and observe the introductory information
and safety warnings The area monitoring system (Front Assist) has physical
and system-related limits. The driver may therefore feel that, in certain circumstances,
some Front Assist reactions occur unexpectedly or with a delay. You should t ...
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