W/Harness Inspection

Ground Circuit inspection

1. Ignition "OFF"
2. Disconnect OTS connector
3. Measure resistance between terminals 1 of the OTS harness connector and chassis ground.

Specification : Approx. 0 Ohms




4. Is resistance within specification ?






Signal Circuit Inspection

1. Check the signal circuit for short to battery
(1) Disconnect ECM harness connector
(2) Ignition "ON" & Engine "OFF""
(3) Measure voltage between terminal 2 of the OTS harness connector and chassis ground.

Specification : Approx. 0V




(4) Is voltage within specification ?





2. Check the signal circuit for open
(1) Ignition "OFF"
(2) Measure resistance between terminals 2 of the OTS harness connector and 40 of the ECM harness connector.

Specification : Approx. 0 Ohms




(3) Is resistance within the specification ?






Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) 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 ?