2. Measure the oxygen sensor feedback voltage.
A) Connect the positive lead of the voltmeter to the "VF1" diagnostic connector, and the negative terminal to the output "E1" and check according to the algorithm given on the next page.
3. Measure the resistance of the oxygen sensor heater by connecting an ohmmeter to the terminals "+V" And "NT".
- Rated resistance (at t = 20°C) - 11.7-14.3 ohms
If the resistance value is out of range, replace the oxygen sensor.