Ground Circuit Inspection
- Ignition "OFF"
- Disconnect HO2S connectors
- Measure resistance between terminals 1 of the sensor 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.