Signal Circuit Inspection
- Ignition "ON" & Engine "OFF".
- Measure voltage between signal terminal of HO2S (B1S2) harness connector and chassis ground.
Specification: Approx. 0.4~0.5V
- Is voltage within the specification?
YES
- Go to next step.
NO
- Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NOTE: HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor wire (s). Do not attempt to repair the wire (s), connector, or the terminals.