Sonata GL V6-3.0L (1997)
rpm, which is required for proper testing.
NOTE:
When HDS is used to monitor oxygen sensor signals on 1996 MY and later Accent, Elantra and Tiburon vehicles, a 0.70 V signal offset is observed.
This shifts the sensor readings 0.70 V higher so the new signal range is 0.70 V to 1.70 V. This shift is seen only when using the HDS machine
because the sensor signal is read before it is processed (filtered) by the PCM. The offset has no effect on the sensor signal appearance or frequency.
(See graph.)
1.
Connect the scan tool and retrieve all diagnostic codes (see Scan Tool Testing Procedure section for details). If codes other than oxygen sensor
codes are present, diagnose/repair these conditions BEFORE continuing with oxygen sensor diagnosis.
2.
Connect HDS to vehicle.
3.
Warm up vehicle to operating temperature (until the engine cooling fan begins to cycle, approximately 3 minutes).
4.
Select "Signal Wave Forms" from HDS.
5.
Select the front and rear oxygen sensor signals and the throttle position sensor (TPS) signal (the TPS is used to establish an approximate
relationship between the throttle position and engine rpm).
