Avenger L4-2.0L DOHC (1995)
Oxygen Sensor: Testing and Inspection
Front Oxygen Sensor Test
1. Disconnect the heated oxygen sensor connector.
2. Check that there is continuity between terminal 3 and terminal 4 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. Use the jumper wires to connect terminal 3 of the heated oxygen sensor connector to the battery (+) terminal and terminal 4 to the battery (-)
terminal.
CAUTION: Be very careful when connecting the jumper wires, or the heated oxygen sensor can be damaged.
6. Connect a digital voltage meter between terminal 1 and terminal 2.
7. While repeatedly racing the engine, measure the heated oxygen sensor output voltage.
Standard value when racing engine:
-
Oxygen Sensor Output Voltage: 0.6-1.0 V
NOTE: If you make the air/fuel ratio rich by racing the engine repeatedly, abnormal heated oxygen sensor will output a voltage of 0.6-1.0 V
8. If the sensor is defective, replace the heated oxygen sensor.
NOTE: If the scan tool does not display the standard value although no malfunction is found by the above-mentioned continuity test and harness check,
replace the heated oxygen sensor (rear).
