3.
Measure resistance between terminals 2 of the sensor harness connector and chassis ground.
1)
Specification : Approx. 0Ω
Ignition "OFF"
Disconnect HO2S connector.
Measure resistance between terminals 2 of the sensor harness connector and chassis ground.
Specification : Approx. 0Ω
Is resistance within the specification?
YES
▶ Go to "Signal circuit inspection" procedure
NO
▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure
HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor wire(s). Do not attempt to repair the wire(s), connector, or the terminals.
Ignition "ON" & Engine "OFF"
Measure voltage between terminals 1 of the sensor harness connector and chassis ground
Specification : Approx. 0.4~0.5V
Is voltage within the specification?
YES
▶ Go to next step as below
NO
▶ Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure
HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor wire(s). Do not attempt to repair the wire(s), connector, or the terminals.
Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
▶ Go to next step as below
