Current Pump Circuit Inspection
- Turn the ignition switch "OFF"
- Disconnect HO2S (S1) connector and ECM connector.
- Measure the resistance between both ends of the HO2S (S1) Current Pump terminal harness.
Specification: Approx. 0Ω.
- Is the measured resistance within specification?
YES
- Go to "Component Inspection ".
NO
- Repair relevant component (s) as necessary and then go to "Verification of Vehicle Repair "