Volkswagen Passat 1995 Official Factory Repair Manual page 3152

Teves 04 Anti-lock Brakes (ABS) and Anti-lock Brakes with Electronic Differential Lock (ABS/EDL), ...
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The On Board Diagnostic (OBD) program must
be initiated at the start of the troubleshooting
process by checking for stored malfunction
information using the VAG 1551 scan tool.
VAG 1551 scan tool
The Diagnostic Trouble Code (DTC) information
displayed by the scan tool is used in conjunction
with a DTC table, which lists possible causes of
the malfunction and suggested repairs.
The OBD troubleshooting and repair procedures
for ABS and ABS/EDL are identical. Both
systems have control modules equipped with 55
pins. The On Board Diagnostic (OBD) operates
in the rapid data transfer mode.
With the exception of the additional terminals
assigned to the electronic differential lock
system, the terminal assignments for the ABS
control module -J104- 55-pin connector are
identical for both systems.
ABS only
When performing the electrical test, carry out all
test steps not marked EDL.
ABS/EDL
When performing the electrical test, carry out all
test steps.
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