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Power Circuit Inspection

Check open in harness
1. IG "OFF" & Disconnect HO2S (S1)_UP connector.
2. IG "ON".
3. Measure the voltage between power terminal "2" of HO2S (S1)_UP harness connector and chassis ground.
  Specification: B+
4. Is the measured voltage within specification?
  YES
  - Go to "CONTROL CIRCUIT INSPECTION " procedure
  NO
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.