Kia 2004.5 Spectra Service Technical Training page 141

2004.5 Spectra Technology
HO2S HEATER
Driveability
When the free oxygen or free fuel has been
neutralized, the "Vs" feedback signal goes to about
450mV (same as the "Vref" value). The pump current
required to produce this equilibrium is a measure of
the air-fuel ratio. The electronics in the unit converts
the "Ip" into a "Vout" which is the output of the unit
to the PCM.
The heater unit is similar to other HO2S used in Kia
vehicle with the exception of a faster light off for
quicker response time. The heater unit receives B+
power from the main relay through fuse SNSR 10A to
Pin 5. Ground switched by the ECM at pin 6. Then
Pin 1 is the VS positive, Pin 2 is "Rc", Pin 3 is "Rp" and
Pin 4 is "Vs/Ip" negative.
Verifying for DTCs with the Hi-Scan Pro is performed
during Diagnostics. If current DTC exists, check for
short to ground in the harness by visually inspecting
the HO2S and then installing a known good part. Use
the Hi-Scan Pro to determine if the DTC is still current.
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