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Zirconium O2 Sensor Testing
Passing Results Minimum Voltage (Artificially Full Lean)
0V – 175mV Maximum Voltage (Artificially Full Rich)
800mV – 1V Rise Time (Snap Throttle)
< / = 100mS (from 175mV – 800mV)
Test O2S with DSOPropane enrichment tool, DSOminimum voltage = 0 - 175mV
maximum = 800 - 1000mVrate of change = < 100 mS (175mV - 800 mV)
RPM
O2S
STFT
IPW
TPS
MAF
= 50mV
= 50mV
= 175mV
= 50mV
= 175mV
= 800 mV
= 50mV
= 175mV
= 800 mV
Fail!
Test Question! Using a DSO, a technician tests an O2
sensor for “rise time” by snapping the throttle and freezing the frame. The technician has set up the DSO time scale for 200mS per division, with 5 subdivisions each. When measured at the specified voltage levels, the rise time between the cursors was 3 subdivisions. What is the measured time difference, and does this O2 sensor pass the rise time test?
The time difference is 120ms and it does not pass the test
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