Component Testing

1. Warm up the engine and check that engine coolant temperature is 80-90°C (176-194°F).
2. Disconnect the oxygen sensor and connect the digital voltmeter.

Caution: Do not pull the connector and lead wires strongly when disconnecting the oxygen sensor connector.

3. While repeatedly racing the engine, measure the output voltage of the oxygen sensor.
4. Replace the oxygen sensor if it is faulty.