Signal Circuit Inspection

IG "OFF" and disconnect HO2S(B2/S2) connector.
IG "ON" and ENG "OFF"
Measure voltage between terminal 3 of HO2S(B2/S2) harness connector and chassis ground.
Specification:

Prix. 3.5V - when pumping current is ON

Prix. 0.45V - when pumping current is OFF

Fig 1: Measuring Voltage Between Terminal 3 Of HO2S(B2/S2) Harness Connector And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
Is the measured voltage within specification?
YES
- Go to "GROUND CIRCUIT INSPECTION " procedure.
NO
- Repair open in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.