Control Module and Hydraulic Unit, From M.Y 2000

Control module and hydraulic unit removing and installing From m.y 2000

Special tools and equipment





^ VAG1331 torque wrench





^ VAG1869/2 brake pedal loading device

The hydraulic unit and control module are not available as individual items. If found to be faulty, the hydraulic unit and control module should always be removed together.

Location:
The control module is bolted to the hydraulic unit and is located on the left side, in the engine compartment.

CAUTION! Do not bend the brake lines in the area of the hydraulic unit!

Removing:
^ Vehicles equipped with coded radio, note or request radio code if necessary.
^ Disconnect battery.





^ Release control module connector (arrow -1-) and pull off (arrow -2-).
^ Connect bleeder bottle hose to left-front brake caliper bleed screw and open bleed screw.
^ Install brake pedal loading device from VAS 5234
^ Depress brake pedal with brake pedal depressor.
^ Close left-front bleeder screw.
^ Place lint-free cloths under the control module and hydraulic unit.
^ Disconnect brake lines on the hydraulic unit.
^ Seal brake lines and threaded holes with plugs from repair kit Part No. 1 HO 698 311 A.





^ Remove hex nuts on hydraulic unit bracket -arrows-.
^ Remove hydraulic unit.

Installing:

Note:
^ Remove sealing plugs on new hydraulic unit when the corresponding brake line is going to be connected.
^ If the sealing plugs are removed too early, brake fluid can escape, and can no longer be guaranteed that the unit is filled or bled.

Installation is the reverse of Removal
Bleeding brake system, Refer to Brake Bleeding, Service and Repair
^ Enter radio code.
^ Code control module

go to Code control module using VAS 5051 via "Guided fault finding" function.

Tightening Torques
Brake lines to ABS module:
Thread M 10 x 1 14 Nm
Thread M 12 x 1 14 Nm

Hydraulic unit hex nut to retainer, Refer to Hydraulic unit, brake Servo/brake master cylinder from M.Y. 2000: Assembly overview ; item 7