User Manual

Page 11




-
ence cell to keep it at a set output ( approximately 0.45 Volts), and from this calculates
the actual mixture in the exhaust.
A basic test can be performed on this type of sensor by simply measuring the output signal

which is steady and near stoichiometric (0.45 Volts).
4.2 
to select sen-
sor type and to connect the test leads to the sensor’s wires.

B



Crosses per second


Lean 
Zirconia and
Titanium 1
Volt
< 0.3 Volt > 0.6 Volt



Engine at 2500
RPM
Oxygen sensor
at approximately

Titanium 5
Volt
> 3.5 Volt < 1.5 Volt
Zirconia and
Titanium 1
Volt
< 0.2 Volt
when
forced
lean*
> 0.8 Volt
when
forced
rich*
N/A
Oxygen sensor
at approximately

Titanium 5
Volt
< 4.5 Volt
when
forced
lean*
< 0.1 Volt
when
forced
rich*




             
hydrocarbons (fuel) and carbon monoxide present in the exhaust are completely burned
before reaching the tail pipe.


and Titanium 1 Volt, and 2.5 Volt for Titanium 5 Volt sensors, and the crosses per second
should be 0 (in the alphanumeric display).


A constant rich or lean output may indicate a damaged oxygen sensor or faulty wiring.
    
sensor is working properly.



Sensor signal measurement’.

    



-

it, so the sensor “sees” a rich mixture.

should fall to 0.2 Volt or below, as the sensor detects the oxygen in the air around it.
Page 12
