Dynasty L4-153 2.5L SOHC VIN K TBI (1992)
Oxygen Sensor: Testing and Inspection
Sensor Functional Test
Oxygen Sensor And Connector
Caution: Use a high impedance [1] Digital Volt Ohm Meter (DVOM) only, when testing components on computerized vehicles, unless directed to do
otherwise by a test procedure.
Caution: To avoid damaging O2 Sensor do not measure sensor resistance.
1.
Run the engine at 2500 rpm for 3 minutes with the transmission in PARK (A/T) or NEUTRAL (M/T). (Make sure the vehicle is at normal
operating temperature.)
2.
Set the meter to read DC VOLTS, (not ohms).
3.
With engine OFF, connect one lead of meter to engine ground. Disconnect the O2 sensor (HO2S) electrical connector and connect the other meter
lead to the oxygen sensor signal wire (BK/DG wire).
4.
Create a lean condition for 10 seconds. Voltage should decrease to 0.2 volt or less and remain there.
5.
Create a rich condition for 10 seconds. Voltage should increase to 0.8 volt or more and remain there.
6.
If sensor fails either test above, replace sensor.
7.
Clear codes, and test operation.
Remarks:
[1] Minimum 10 Meg (10,000,000) ohm input impedance.
