Test Step 3 - O2 Sensor Heater Operation
- Turn the ignition off.
NOTE:
Wait a minimum of 10 minutes to allow the O2 sensor to cool down before continuing the test. Allow the O2 sensor voltage to stabilize at 5.0 volts.
- Turn the ignition on.
- With a scan tool, actuate the O2 sensor heater.
- With the scan tool, monitor O2 sensor voltage for at least 2 minutes.
Does the voltage remain at more than 4.5 volts?
Yes
- Go to Test Step TEST STEP 4 - O2 SENSOR TEST .
No
- Test complete.
- Perform the PCM Verification Test. Refer to PCM VERIFICATION TEST .