With SST-Engine Signal Monitor

HEATED OXYGEN SENSOR
Inspection Using SST-(Monitor, Engine Signal and Adapter Harness)
1. Remove the ECM.




2. Connect the SSTs (Monitor, Engine Signal and Adapter Harness) to the ECM.
3. Warm up the engine to normal operating temperature.
4. Measure the voltage at ECM terminal 2K, and 3C.




5. If not as specified, inspect following.
- Intake-air system
- Fuel system
- On-board diagnostic system
If these systems are OK, replace the heated oxygen sensor.


Heater Inspection:
1. Disconnect the heated oxygen sensor connector.







2. Measure the resistance between heated oxygen sensor terminals C and D by using an ohmmeter.

Specification: Approx. 13 Ohms @ 20 °C (68 °F)

3. If not as specified, replace the heated oxygen sensor.