Component Testing

To perform a complete test of the O2S sensors and their circuitry refer to Computers and Control Systems/Testing and Inspection/Procedures.

Testing and Inspection

To test the O2S sensors only, refer to the following:

Fig. 34 O2 Sensors:

Each O2S heating element can be tested with an ohmmeter as follows:
Disconnect the O2S sensor connector. Connect the ohmmeter test leads across the white wire terminals of the sensor connector. Resistance should be between 4.5 +/- 0.5 ohms and 7 ohms. Replace the sensor if the ohmmeter displays an infinity (open) reading.