Passat Wagon 4Motion V6-2.8L (ATQ) (2003)
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Remove hydraulic unit with control module.
If the control module malfunctions, the hydraulic unit must be separated from the control module and the control module must be replaced, Refer to
Antilock Brakes / Traction Control Systems, Description and Operation
If the hydraulic unit malfunctions, the complete hydraulic unit with control module must be replaced.
Installing
Note:
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Remove sealing plugs on new hydraulic unit when the corresponding brake line is going to be connected.
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If the sealing plugs are removed too early, brake fluid can escape, and can no longer be guaranteed that the unit is sufficiently filled or adequately
bled.
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Installation is the reverse order of removal.
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Bleeding brake system, Refer to Brake Bleeding, Service and Repair
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Enter radio code.
go to Code control module using VAS 5051 via "Guided fault finding" function.
Tightening torques:
Brake lines to ABS module:
Thread M 12 x 1, AF 11 .................................................................................................................................................................................... 14 Nm
Thread M 12 x 1, AF 12 .................................................................................................................................................................................... 24 Nm
Disassembling and Assembling
Control module and hydraulic unit, disassembling and assembling
This work procedure only applies if the control module is malfunctioning.
If the hydraulic unit malfunctions, the complete hydraulic unit with control module must be replaced.
Note:
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The sealing surface the hydraulic unit must be clean and undamaged. It must not be refaced.
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If the sealing surface is damaged, the hydraulic unit with the control module must be replaced complete.
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The seal at control module must not be removed, it cannot be replaced.
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The bolts of control module to hydraulic unit must always be replaced after removal.
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The threads in the hydraulic unit must not be reworked.
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The hydraulic unit with the control module must be replaced complete, if one or more threads are damaged.
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After disconnecting control module/hydraulic unit, use transport protection for valve domes.
Special tools and equipment
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VAG1783 torque wrench
Disassembly
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Control module with hydraulic unit, removing, Refer to Control Module and Hydraulic Unit, Removing and Installing