Ground Circuit Inspection

Check Open In Harness
1. IG "ON". Disconnect HO2S (B2/S1) connector.
2. Measure voltage between signal terminal of HO2S (B2/S1) harness connector and chassis ground. (Measurement "A")
3. Measure voltage between signal and ground terminals of HO2S (B2/S1) harness connector. (Measurement "B")
  Specification: Voltage difference between measurement "A" and "B" is below 200mV.
4. Is the measured voltage within specification?
  YES
  - Go to "COMPONENT INSPECTION " procedure.
  NO
  - Repair contact resistance or open in harness. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.