Hyundai i-30: Engine Control System / Heated Oxygen Sensor (HO2S)
Description and operation
Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed
both upstream and downstream of the Manifold Catalytic Converter. The sensor
output voltage varies in accordance with the air/fuel ratio.
The sensor must be hot in order to operate normally. To keep it hot, the sensor
has a heater which is controlled by the ECM via a duty cycle signal. When the
exhaust gas temperature is lower than the specified value, the heater warms
the sensor tip.

Specifications
HO2S [Bank 1 / Sensor 1] (Linear type)
Item
|
Specification
|
Heater Resistance (Ω)
|
Approx. 2.5 [20°C (68°F)]
|
HO2S [Bank 1 / Sensor 2] (Binary type)
Item
|
Specification
|
Heater Resistance (Ω)
|
Approx. 3.0 [20°C (68°F)]
|
Schematic diagrams

Harness Connector
HO2S [Bank 1 / Sensor 1]

HO2S [Bank 1 / Sensor 2]

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].
|
4. |
Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
|
5. |
Check that the resistance is within the specification.
Specification : Refer to "Specification"
|
|
[Bank 1 / Sensor 1]
1. |
Turn the ignition switch OFF and disconnect the battery negative (-)
cable.
|
2. |
Disconnect the connector (A), and then remove the sensor (B).
• |
Note that the SST (Part No. : 09392-1Y100) is useful
when removing the heated oxygen sensor.

|
|

|
[Bank 1 / Sensor 2]
1. |
Turn the ignition switch OFF and disconnect the battery negative (-)
cable.
|
2. |
Disconnect the connector (A), and then remove the sensor (B).


|
•
|
Install the component with the specified torques.
|
•
|
Note that internal damage may occur when the component is dropped.
If the component has been dropped, inspect before installing.
|
|
•
|
DON’T use a cleaner, spray, or grease to sensing element and
connector of the sensor because oil component in them may malfunction
the sensor performance.
|
•
|
Sensor and its wiring may be damaged in case of contacting with
the exhaust system (Exhaust Manifold, Catalytic Converter, and
so on).
|
|
1. |
Install in the reverse order of removal.
Heated oxygen sensor installation :
39.2 - 49.1 N.m (4.0 - 5.0 kgf.m, 28.9 - 36.2 lb-ft)
|
|
Description and operation
Description
Knocking is a phenomenon characterized by undesirable vibration and noise and
can cause engine damage...
Description and operation
Description
Accelerator Position Sensor (APS) is installed on the accelerator pedal module
and detects the rotation angle of the accelerator pedal...
Other information:
Components and components location
Components
[Front seat switch]
1. Driver seat
heater switch
2. Assist seat
heater switch
Schematic diagrams
Circuit Diagram
[Front Seat Heater Switch(Driver)]
[Front Seat Heater Switch(Assist)]
Repair procedures
Removal
[Front Seat]
1...
Troubleshooting
Symptom
Suspect area
Remedy
Engine misfire with abnormal internal lower engine noises.
Worn crankshaft bearings.
Loose or damaged engine drive plate.
Replace the crankshaft and bearings as required...
Categories

(1) Driver’s door power window
switch
(2) Front passenger’s door power
window switch
(3) Rear door (right) power window
switch
(4) Rear door (left) power window
switch
(5) Window opening and closing
(6) Automatic power window
(7) Power window lock switch
read more