Sonata GL V6-3.0L (1997)
10.
The front sensor should cross the midpoint of signal travel at least 7 times in 5 seconds when the vehicle is at 2500 rpm. The rear oxygen sensor
should change slowly, if at all.
11.
Record the sensors' reaction to a fuel cut by revving engine to 4000 rpm and let it stabilize. Quickly close the throttle and observe the front and
rear sensor signals (see plots 2 & 5).
Note:
A vacuum leak can also be intentionally created to check sensor response (see plots 3 & 4).
12.
If an intermittent condition is reported, "wiggle check" all the connectors and wiring harnesses related to the oxygen sensor while the vehicle and
the HDS are running.
Samples of Oxygen Sensor HDS Plots For Accent, Elantra, Tiberon
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This sample plot shows a typical front and rear oxygen sensor at 2500 rpm for Accent, Elantra or Tiburon.
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The front signal is a fluctuating signal that changes from 0.84 to 1.49 V, while the rear signal remains constant. (Note the 0.70 V signal offset).
