Check Resistance
- Ignition switch is turned "OFF". Disconnect HO2S (B1/S2) connector.
- Measure resistance between both ends of signal terminal of HO2S (B1/S2) harness.
Specification: Approx. 0Ω
- Is resistance within the specification?
YES
- Go to "GROUND CIRCUIT INSPECTION " procedure.
NO
- Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.