Volkswagen Passat 1995 Official Factory Repair Manual page 1060

Multiport fuel injection and ignition system
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW...
Checking basic voltage
- Separate 4-pin connector (black) -1-
to HO2S -G39- (before three way
catalytic converter).
- Connect multimeter with test leads
from VW 1594 to measure voltage
between terminals 3 and 4 (ECM
side of harness connector).
- Start engine and measure the basic
voltage.
Specification: 0.40-0.50 volts
- Switch ignition off.
If the specification is not attained:
- Check HO2S wiring
If the specification is attained:
- Replace HO2S -G39- (before three
way catalytic converter).
Page 49 of 144
24-33
Page 24-34 .
6/12/2004