Check Resistance
- Turn "OFF" the ignition switch. Disconnect HO2S connector.
- Measure resistance between ground terminal of HO2S (B1/S1) harness connector and chassis ground.
Specification: Approx. 0Ω
- Is resistance within the specification?
YES
- Go to "Component Inspection" procedure below.
NO
- Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.