Volkswagen Passat 1995 Official Factory Repair Manual page 3154

Teves 04 Anti-lock Brakes (ABS) and Anti-lock Brakes with Electronic Differential Lock (ABS/EDL), ...
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Safety precautions and fundamental
points regarding troubleshooting
ABS is a vehicle safety system; appropriate
knowledge is necessary to work on the system.
Do not drive with the harness connector
disconnected from the ABS control module -
J104-.
In order to check complaints and to be able to
carry out pin-pointed troubleshooting, DTC
memory must be checked before starting work
on the ABS or ABS/EDL system.
Do not disconnect or re-connect harness
connectors when the ignition is switched on.
Observe the appropriate instructions regarding
the handling of brake fluid
Repair Manual, Suspension, Wheels, Brakes,
Steering, Repair Group 47
ABS malfunctions are indicated by the ABS
warning light coming on; certain malfunctions
will not be recognized at speeds below 40 km/h
(24 mph); carry out a road test.
If the ABS warning light -K47- does not light up,
but the brake system is not functioning
correctly, then the malfunction must be
diagnosed in the conventional braking system
(e.g. leaks in the brake hydraulic system).
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