W/Harness Inspection

Terminal and 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 ?






Power Circuit Inspection

1. IG "OFF" & Disconnect HO2S (B2/S2) connector.
2. IG "ON" & ENG "OFF".
3. Measure voltage between terminal 1 of HO2S (B2/S2) harness connector and chassis ground.

Specification : B+





4. Is the measured voltage within specification ?






Control Circuit Inspection

1. Check short to ground in harness.
(1) IG "OFF" and disconnect HO2S (B2/S2) connector.
(2) Measure resistance between terminal 2 of HO2S (B2/S2) harness connector and chassis ground.

Specification : Infinite





(3) Is the measured resistance within specification ?





2. Check open in harness
(1) IG "OFF" and disconnect HO2S (B2/S2) and PCM connector.
(2) Measure resistance between terminal 2 of HO2S (B2/S2) harness connector and terminal 73 of PCM harness connector.

Specification : Approx. below 1 ohms





(3) Is the measured resistance within specification ?