W/Harness Inspection

Engine Control
P2626 O2 Sensor Pumping Current Trim Circuit/Open (Bank 1 Sensor 1) - Inspection/Repair:_:W/Harness Inspection

Terminal & Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Current Adjust Circuit Inspection

Check Open or Short in signal circuit
1. IG KEY "OFF".
2. Disconnect HO2S(S1) connector.
3. IG KEY "ON" & ENG "OFF".
4. Measure the voltage between Current Adjust terminal of HO2S(S1) harness connector and chassis ground.

Specification :Approx 2.8V




5. Is the measured voltage within specification ?