Signal Circuit Inspection
- IG "OFF" & Disconnect HO2S(S1) connector.
- IG "ON" & ENG "OFF".
- Measure the voltage between Nernst Voltage, Vertual Ground Output, Current Adjust and Current Pump terminals of HO2S(S1) harness connector and chassis ground.
Specification: Nernst Voltage terminal: Approx. 2-3V; Vertual Ground Output terminal: Approx. 2.5V; Current Adjust terminal: Approx. 2-3V; Current Pump terminal: Approx. 2-3V
- Is the measured voltage within specification?
YES
- Go to COMPONENT INSPECTION .
NO
- Repair or replace as necessary, then go to "VERIFICATION OF VEHICLE REPAIR ".