Volkswagen Passat 1995 Official Factory Repair Manual page 1894

Multiport fuel injection and ignition system
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.FU07.24.1
If voltage was present:
- Check relevance table
of O2S control status, display group 121, display
field 4, 1st position from left.
- Connect multimeter with test leads from VW 1594
to ECM connector terminal 2 and battery positive
(B+).
When display = 1: specification is 11.0-14.5 volts
When display = alternately 0 and 1: specification is
fluctuating between 0.0-12.0 volts
- Switch ignition off.
If the specification is not attained:
- Connect VAG 1598/18 test box to ECM wiring
harness (arrow).
Page 55 of 126
Page 24-51 for value
12/6/2004
24-54