Turn the ignition switch OFF.
Disconnect the HO2S connector.
Measure resistance between the HO2S terminals 2 and 5 [B1/S1].
Specification : 2.4-4.0 [20℃(68℉)]
Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
Specification : Approximately 9.0 [20℃(68℉)]
Check that the resistance is within the specification.
