Disconnect the HO2S(s) and PCM connectors and inspect for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Reconnect the connectors.

Connect the GDS and go to ""Current Data"".

Monitor HO2S(s) values in Current Data, check and wiggle the harness(es), connector(s), and terminal(s).

Any change in the values indicates a poor connection. Was a connector problem found?

	▶ Repair the connector. Go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Signal Circuit Inspection" procedure.

IG "OFF". Disconnect HO2S(B2/S1) connector.

IG "ON".

Measure voltage between signal terminal of HO2S(B2/S1) harness connector and chassis ground.

Is the measured voltage within specification?

	▶ Go to "Ground circuit inspection" procedure.
	▶ Repair open in harness, and go to "Verification of Vehicle Repair" prcedure.

IG "ON". Disconnect HO2S(B2/S1) connector.

Measure voltage between signal terminal of HO2S(B2/S1) harness connector and chassis ground.(Measurement "A")

Measure voltage between signal and ground terminals of HO2S(B2/S1) harness connector.(Measurement "B")

Is the measured voltage within specification ?

	▶ Go to "Component Inspection" procedure.
	▶ Repair contact resistance or open in harness. Go to "Verification of Vehicle Repair" procedure.