With GST
- Start engine and warm it up to normal operating temperature.
- Set voltmeter probes between ECM terminal 35 (HO2S1 bank 1 signal) or 16 (HO2S1 bank 2 signal) and engine ground.
- Check the following with engine speed held at 2,000 RPM constant under no load.
- The voltage does not remain in the range of 0.2 to 0.4V.
- If NG, go to "DIAGNOSTIC PROCEDURE " .