DE2 - Check Continuity of FF Sensor Battery Ground Circuit

- Key "OFF".

- Flexible Fuel (FF) sensor disconnected.

- Measure resistance between FF sensor battery ground pin at the vehicle harness connector and battery negative post.

- Is resistance less than 10,000 ohms?

Yes -- Go to DE3. DE3 - Check Continuity of FF Sensor Signal Circuit

No -- Service open circuit(s). Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)