Ground Circuit Inspection
- Ignition "OFF"
- Disconnect HO2S connectors.
- Measure resistance between ground terminal of HO2S (B1S2) harness connector and chassis ground.
Specification: Approx. 0Ω
- Is resistance within the specification?
YES
- Go to "SIGNAL CIRCUIT INSPECTION " procedure.
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.