Sportage 2WD L4-2.0L SOHC (1995)
Oxygen Sensor: Testing and Inspection
Inspection of Terminal Voltage
Test
Test
INSPECTION OF TERMINAL VOLTAGE
1. Warm up the engine to normal operating temperature.
2. Use a DC voltmeter to back probe the sensor.
3. Disconnect the heated oxygen sensor connector
4. Connect a voltmeter between terminal A (BLK wire) and ground.
5. Increase and decrease the engine speed quickly several times.
6. Verify that the meter reading varies between 0.5 - 1.0V.
7. When the engine speed is increased, verify that the meter reading varies between 0.5V - 0.0V.
8. If not as specified, inspect:
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On-board diagnostic system
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System inspection
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Intake manifold vacuum
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Fuel line pressure
9. If all the systems are normal, replace the heated oxygen sensor.
