Kia Picanto: Engine Control System / Heated Oxygen Sensor (HO2S)
Specifications
HO2S [Bank 1/Sensor 1]
Item
|
Specification
|
Heater Resistance (Ω)
| 2.5 - 4.0 [20°C(68°F)]
|
Type
| Linear
|
Pin
| 6
|
HO2S [Bank 1/Sensor 2]
Item
|
Specification
|
Heater Resistance (Ω)
| Approximately 9.0 [20°C(68°F)]
|
Type
| Binary
|
Pin
| 4
|
Description and operation
Installed
in both upstream and downstream of the Manifold Catalytic Converter,
the Heated Oxygen Sensor (HO2S) consists of zirconium and alumina. The
sensor output voltage varies in accordance with the air fuel ratio.
The
sensor must be heated in order to operate properly. To keep it heated,
it is equipped with a heater controlled by the ECM via a duty cycle
signal. When the exhaust gas temperature is lower than the specified
value, the heater will warm up the sensor tip.
Schematic diagrams
Repair procedures
| 1. | Turn the ignition switch OFF. |
| 2. | Disconnect the HO2S connector. |
| 3. | Measure resistance between the HO2S terminals 2 and 5 [B1/S1].
Specification : 2.4-4.0 [20°C(68°F)] |
|
| 4. | Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
Specification : Approximately 9.0 [20°C(68°F)] |
|
| 5. | Check that the resistance is within the specification. |
Note that the SST 09392-1Y100 can be used for removing the heated oxygen sensor. |
| 1. | Turn the ignition switch OFF and disconnect the battery negative (-) terminal. |
| 2. | Disconnect the connector (A). |
| 3. | Remove the heated oxygen sensor (B).
Heated oxygen sensor:
39.2 - 49.1 N·m (4.0 - 5.0 kgf·m, 28.9 - 36.2 lb·ft) |
 |
| 1. | Turn the ignition switch OFF and disconnect the battery negative (-) terminal. |
| 2. | Disconnect the connector (A).
 |
| 3. | Remove the heated oxygen sensor (A).
Heated oxygen sensor:
39.2 - 49.1 N·m (4.0 - 5.0 kgf·m, 28.9 - 36.2 lb·ft) |
 |
| •
| Install the component to the specified torques. |
| •
| Note
that internal damage may occur when the component is dropped. If the
component has been dropped, inspect before installing. |
| •
| DO
NOT use a cleaner, spray, or grease to sensing element and connector of
the sensor as oil substance may degrade the sensor performance. |
| •
| Sensor and its wiring may get damaged by contacting with the exhaust system (Exhaust Manifold, Catalytic Converter, etc.). |
|
| 1. | Install in the reverse order of removal. |
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