Ground Circuit Inspection
- Ignition "OFF".
- Disconnect HO2S (B2/S2) and ECM connector.
- Measure resistance between Pin No. 2 (Sensor Low) terminal of HO2S (B2/S2) harness connector and Pin No. 78 (Low) terminal of ECM harness connector.
Specification: Approx. 1Ω below
- Is the measured resistance within specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Repair or replace as necessary and then, go to "VERIFICATION OF REPAIR " procedure.