Passat Syncro Wagon V6-2771cc 2.8L DOHC (AHA) (1998)
Hydraulic Control Assembly - Antilock Brakes: Service and Repair
Hydraulic and Control Modules Removing and Installing
Hydraulic unit -N55- and control Module, removing and installing
Special tools required
Hydraulic unit -N55- and ABS control module cannot be supplied individually at present. Always replace hydraulic unit and control module together.
Location:
The ABS control module is bolted to the hydraulic unit and is located on the left in engine compartment.
Caution: Do not bend brake lines near the hydraulic unit!
Removing:
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Note radio code.
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Disconnect battery.
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Release control module connector (arrow -1-) and disconnect (arrow -2-).
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Install brake pedal loading tool from VAG 1238 B.
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Depress brake pedal at least 60 mm (2.36 inch) with brake pedal depressor.
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Connect bleeder bottle hose to left front brake caliper bleeder screw and open screw.
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Close left front bleeder screw.
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Place sufficient lint-free cloths under control and hydraulic modules.
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Remove brake lines from the hydraulic unit -N55-.
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Seal brake lines and threaded holes with plugs from repair set Part No. 1 H0 698 311 A.
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Remove hex nuts on hydraulic unit bracket.
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Remove hydraulic unit.
Installing:
Notes:
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Remove sealing plugs on new hydraulic unit -N55- only when the corresponding brake line is connected.
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If the plugs are removed too soon a leak can occur and the module must be bled again.
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Reassemble in reverse sequence.
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Bleeding brake system.
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Enter radio code.