Pumping Current Circuit Inspection

IG "OFF" and disconnect HO2S (S1) connector and ECM connector.
Check resistance between Pumping Current terminal of HO2S (S1) Connector and Pumping Current terminal of ECM connector.
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.