Volkswagen Passat 1995 Official Factory Repair Manual page 2852

On Board Diagnostic (OBD), general information
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.AT02.01.1
Electrical malfunctions that affect vehicle
performance can be identified using the VAG
1551 Scan Tool (ST). The On Board Diagnostic
(OBD) capabilities can only be fully exploited
using operating mode 1 ("Rapid data transfer").
Functions of the VAG 1551 Scan Tool (ST)
List of selectable functions, page 01-24
Safety functions of the Transmission Control
Module (TCM)
If critical malfunctions occur while driving, the
transmission will continue to operate in an
emergency running mode. If a malfunction
occurs while the selector lever is in position "D,"
"3" or "2," the 3rd gear emergency running mode
is activated.
If a malfunction occurs while the selector lever is
in position "1," "P," "N" or "R" the emergency
running mode for that stage is activated.
If the engine is started again in the emergency
running mode and the malfunction occurs when
the selector lever is in position "D", "3" or "2" then
3rd gear is activated hydraulically, until the
malfunction is repaired.
If there are malfunctions that result in emergency
running, the transmission remains in the
emergency running mode until the ignition is
switched off.
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12/6/2004