2007 KIA CARNIVAL Workshop Manual

2007 > 2.7L V6 GASOLINE >
INSPECTION
FUNCTION AND OPERATION PRICIPLE
Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed on upstream and downstream of the
Manifold Catalyst Converter (MCC). After it compares oxygen consistency of the atmosphere with the exhaust gas, it
transfers the oxygen consistency of the exhaust gas to the PCM. When A/F ratio is rich or lean, it generates
approximately 1V or 0V respectively. In order that this sensor normally operates, the temperature of the sensor tip is
higher than 370°C (698°F). So it has a heater which is controlled by the PCM duty signal. When the exhaust gas
temperature is lower than the specified value, the heater warms the sensor tip.
SPECIFICATION
A/F Ratio Output Voltage (V)
RICH 0.80 ~ 0.92
LEAN 0.1
Item Specification

Heater Resistance (Ω)3.0 ~ 4.0Ω at 21°C (69.8°F)
WAVEFORM
CIRCUIT DIAGRAM

COMPONENT INSPECTION
1.Check signal waveform of HO2S using a scantool.
Specification: Refer to "waveform".
2. Disconnet the HO2S connector.
3. Measure resistance between HO2S heater terminals 3 and 4.

4.Check that the resistance is within the specification.
Specification: Refer to SPECIFICATION.

CVVT Oil Temperature Sensor(OTS)

2007 > 2.7L V6 GASOLINE >
INSPECTION
FUNCTION AND OPERATION PRICIPLE
The CVVT Oil Temperature Sensor (OTS) is a negative coefficient thermistor used by the PCM tl measure engine oil
temperature for the purpose of adjusting CVVT calculations.
SPECIFICATION
Temperature Resistance (kΩ)
°C °F
- 40 - 4052.0
- 20 -416.5
0 32 6.0
20 682.45
40 104 1.10
60 1400.544
80 1760.290
100 2120.164
120 2480.099
CIRCUIT DIAGRAM

COMPONENT INSPECTION
1.Turn ignition switch OFF.
2. Disconnect OTS connector.
3. Remove the OTS.
4. After immersing the thermistor of the sensor into water (or engine coolant), measure resistance between OTS
terminals 1 and 2.
5.Check that the resistance is within the specification.
Specification: Refer to SPECIFICATION.

Knock Sensor(KS)