Control Circuit Inspection
- Ignition "OFF" & Disconnect HO2S (S2) connector.
- Ignition "ON"
- Measure voltage between Pin No. 4 (Control) terminal of HO2S (S2) harness connector and chassis ground.
Specification: Approx. 3.5V
- Is the measured voltage within specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Repair or replace as necessary and then, go to "VERIFICATION OF REPAIR " procedure.