Ground Circuit Inspection

IG "OFF" & Disconnect HO2S (B1/S1) connector.
IG "ON" & ENG "OFF".
Measure resistance between ground terminal of HO2S (B1/S1) and chassis ground.
Specification: below 1Ω
Is the measured resistance within specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.