Volkswagen Passat 1995 Official Factory Repair Manual page 1884

Multiport fuel injection and ignition system
Evaluating display group 116
Display group:
116
Display field: 3
Approx. 0.435 V
Approx. 0.440 V
Approx. 1.085 V
Approx. 0.000 V
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Possible malfunction cause
Wiring open circuit in wire 4 between HO2S and
ECM.
Wiring open circuit in wire 3 between HO2S and
ECM
Short circuit to positive (B+) in wire 4 between
HO2S and ECM
Short circuit to Ground (GND) in wire 4 between
HO2S and ECM
Continuation
- Perform test drive to remove possible residue
from HO2S and repeat the check.
If the specification in display field 3 is not
attained even after a test drive:
- Check O2S heating
- Rev-up to above 3000 RPM.
If the value in display field 3 remains constant
Page 24-44 , evaluating display group 116.
Page 45 of 126
Page 24-49 .
Malfunction elimination
- Check basic voltage
Page 24-46
- Check HO2S wiring
Page 24-47
24-44
12/6/2004