radio VOLKSWAGEN PASSAT 1996 B3, B4 / 3.G Service Workshop Manual

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Notes for repair work on ABS, ABS/EDL
Before doing any repair work on the anti-locking system, determine the cause of the malfunction
using On Board Diagnostic (OBD).
Repair Manual, Brake System On Board Diagnostic (OBD), Repair Group 01 Before working on the ABS, ABS/EDL system,
disconnect the battery Ground strap. On
vehicles with coded radio, obtain cooling.
When working with brake fluid, observe the
relevant safety precautions and notes Page 47-27 . After work for which the brake system had to be opened, bleed the brake system with brake filler and bleeder unit VAS 5234 Page 47-27 . During the final road test, make sure that a
controlled brake test is performed at least once
(pulsations must be felt at the brake pedal).
Absolute cleanliness is required when working
on the anti-locking brake system; it is not
permitted to use any products which contain
mineral oils, such as oils, greases etc. Page 2 of 5Anti-locking Brake System (ABS) and Anti-locking Brake System with Electronic Differential Lock (A...12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.45.1

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Safety precautions

WARNING!

Brake fluid is poisonous.

CAUTION!
Before working on the ABS or ABS/EDL
system, disconnect the battery Ground
(GND) strap. For anti-theft coded radios, first
make sure that the radio code is available.
Brake fluid must not contact painted parts. Brake fluid absorbs moisture from the air
and must therefore be replaced every two
years. Use only new, approved brake fluid
that complies with MVSS 116 DOT 4.
DO NOT use silicone-brake fluid (DOT 5).
Even the smallest traces can cause sever
corrosion in the brake system.
Before doing any welding repairs on the
vehicle using electric welding equipment,
disconnect the ABS control module.
After work that requires opening the brake
hydraulic system, bleed the system Page 47-29 . Page 2 of 3Anti-lock Brake System (ABS) and ABS with Electronic Differential Lock (ABS/EDL), Teves 20 GI12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.45.2

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After separating ABS control module from ABS
hydraulic unit, always install valve dome
transportation protection on hydraulic unit.
Warranty claims for ABS hydraulic units on which
the valve dome transportation protection was not
used will not be accepted.

Removing

CAUTION!

Determine correct radio anti-theft coding
before disconnecting the battery.

- Disconnect battery Ground (GND) strap.
- Remove coolant expansion tank and swing to
one side. Page 4 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