Lancer L4-2.0L (4B11) (2008)
Oxygen Sensor: Testing and Inspection
HEATED OXYGEN SENSOR CHECK
Required Special Tools:
-
MB991958: Scan tool (M.U.T.-III Sub Assembly)
-
MB991824: V.C.I.
-
MB991827: USB Cable
-
MB991910: Main Harness A
-
MB991316: Test Harness
-
MB991658: Test Harness
Heated oxygen sensor (front) <Except for California>
1. Disconnect the heated oxygen sensor connector and connect special tool MB991658 to the connector on the heated oxygen sensor side.
2. Make sure that there is continuity [4.5 - 8.0 ohms at 20 °C (68 °F)] between terminal No. 1 and terminal No. 2 on the heated oxygen sensor
connector.
3. If there is no continuity, replace the heated oxygen sensor.
4. Warm up the engine until engine coolant is 80 °C (176 °F) or higher.
5. Rev the engine for 5 minutes or more with the engine speed of 2,500 r/min.
6. Connect a digital voltage meter between terminal No. 3 and terminal No. 4.
7. While repeatedly revving the engine, measure the heated oxygen sensor output voltage.