1997 VOLKSWAGEN PASSAT air bleeding

Downloaded from www.Manualslib.com manuals search engine Rear axle, servicing (four wheel drive vehicles)
Rear drive shafts, servicing
Reworking cap nut in side member (four wheel drive vehicles)
Suspension strut, disassembling and assembling (four wheel drive
vehicles)
Wheel bearings, servicing - disc brakes (four wheel drive vehicles)
44 - Wheels, Tires, Wheel alignment
Vehicle alignment
Test requirements:
Vehicle alignment specifications (front wheel drive vehicles)
Vehicle alignment specifications (four wheel drive vehicles)
Front wheel camber, adjusting
Calculating the direction of travel:
45 - Anti-lock brake system
Anti-locking Brake System (ABS) and Anti-locking Brake System with
Electronic Differential Lock (ABS/EDL) Teves 04
Notes for repair work on ABS, ABS/EDL
Control module, removing and installing
Wheel speed sensor and rotor for speed sensor, removing and installing
Anti-lock Brake System (ABS) and ABS with Electronic Differential Lock
(ABS/EDL), Teves 20 GI
Safety precautions
ABS, ABS/EDL hydraulic unit, vacuum brake booster and brake master
cylinder (Teves 20 GI), servicing
ABS hydraulic unit and ABS control module (Teves 20 GI), removing and
installing
Brake hydraulic system, bleeding and filling
Assembly overview - hydraulic unit, brake servo/brake master cylinder
Hydraulic unit, removing and installing
Brake Pedal Position Sensor, removing and installing
46 - Brakes - Mechanical components
Front brakes, servicing (Girling caliper)
Brake pads, removing and installing

Downloaded from www.Manualslib.com manuals search engine 45-16

Note:
For vehicles equipped with ABS/EDL, on which
the brake fluid reservoir has been completely
empty (e.g. leaks in brake system), it is
necessary to initiate the "Basic Setting" function
of the On Board Diagnostic (OBD) program:
Repair Manual, Brake System On Board Diagnostic (OBD), Repair Group 01 Otherwise the standard brake bleeding
procedures apply.

- Code ABS control module: Repair Manual, Brake System On Board Diagnostic (OBD), Repair Group 01
Tightening torques

ABS control unit to ABS
hydraulic unit 4 Nm (35 in.
lb)
ABS hydraulic unit to bracket
(Torx T25 socket-head bolts) 8 Nm (71 in.
lb)
Brake master cylinder to
vacuum booster 25
Nm (18 ft
lb)
Heat shield to brake master
cylinder 8 Nm (71 in.
lb)
Brake lines to ABS hydraulic
unit
M10 x 1 15
Nm (11 ft
lb)
M12 x 1 15
Nm (11 ft
lb) Page 8 of 9ABS, ABS/EDL hydraulic unit, vacuum brake booster and brake master cylinder (Teves 20 GI), servicing12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.45.3

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Brake hydraulic system, bleeding and
filling

Vehicles with ABS/EDL
For vehicles with ABS/EDL, when the brake fluid
reservoir has been completely emptied (e.g. due
to leaks in the brake system) it is necessary to
initiate the "Basic Setting" function of the On
Board Diagnostic (OBD) program.
Repair Manual, Brake System On Board Diagnostic (OBD), Repair Group 01 Otherwise the standard brake bleeding
procedures apply Page 47-29 . Page 9 of 9ABS, ABS/EDL hydraulic unit, vacuum brake booster and brake master cylinder (Teves 20 GI), servicing12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.45.3

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Pre-bleeding brake caliper Note:
Position brake caliper as illustrated to pre-bleed. - Open bleeder valve and using a standard bleeder
bottle, fill with brake fluid until bubble-free brake
fluid flows from the threaded hole (brake hose
connection). Close bleeder screw. Page 8 of 8Rear brake caliper, servicing12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.4

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Note:
Bleeding brake system on vehicles with ABS Page 47-27 . - Lift vehicle and connect pressure gauges to front
left brake caliper and to rear right wheel
cylinder/caliper.
- Bleed both gauges. - Lower vehicle and bounce the rear of the vehicle
several times.
- Depress brake pedal and check pressures. - Compare figures attained with specifications
Page 47-25 and if necessary adjust. Page 2 of 4Brake pressure regulator, checking and adjusting12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.5

Downloaded from www.Manualslib.com manuals search engine 47-27


Brake system, bleeding

Brake system, bleeding (vehicles with
and without ABS, ABS/EDL)

Changing brake fluid
Repair Manual, Maintenance
Note:
Bleeding the brake system on vehicles with
ABS, ABS/EDL is performed as for vehicles
with conventional braking systems.
Only use new brake fluid conforming to US
standard FMVSS 116 DOT 4.
Genuine VW/Audi brake fluid conforms to this
specification.
Brake fluid is poisonous. Also due to its
corrosive effect brake fluid must not come into
contact with paintwork.
Brake fluid is hygroscopic, which means it
absorbs moisture from the ambient air and
should always be stored in air tight containers.
Rinse off spillages using plenty of water. Repair Manual, Brake System On Board Diagnostic (OBD), Repair Group 01 Page 1 of 3Brake system, bleeding12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.6

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Brake system, bleeding (with pressure
bleeder VAS 5234)
Opening the hydraulic unit bleed screws on
vehicles with ABS, ABS/EDL is not permitted! Bleeding sequence
Note: - Connect VAS 5234 Brake filler and bleeder unit. - Open bleeder screws in the specified order and
bleed brake calipers and wheel cylinders.
1 - Right rear wheel cylinder/brake caliper 2 - Left rear wheel cylinder/brake caliper 3 - Right front brake caliper 4 - Left front brake caliper On vehicles with brake pressure regulator move
the regulator lever when bleeding rear brakes. Depress the brake pedal several times during
bleeding. Page 2 of 3Brake system, bleeding12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.6

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Brake system, bleeding (without
pressure bleeder)
Opening the hydraulic unit bleed screws on
vehicles with ABS, ABS/EDL is not permitted!

- Build-up brake pressure in brake system by
pumping the brake pedal.

- Attach bleeder bottle hose and open bleeder
screw.

- With brake pedal held down, close bleeder
screw.

- Repeat operation until no air is present. Bleeding sequence Page 47-28 Changing brake fluid
Repair Manual, Maintenance Page 3 of 3Brake system, bleeding12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.47.6