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.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure
	▶ Go to " Signal Circuit Inspection " procedure.

IG "OFF" and disconnect EOTS connector.

IG "ON"

Measure voltage between signal terminal of EOTS harness connector and chassis ground.

Is the measured voltage within specification ?

	▶ Go to "Ground Circuit Inspection" procedure.
	▶ If the voltage is 0V, go to "Check open in harness" as follows. If the voltage is more than 5.1V, repair short to battery in harness and go to "Verification of Vehicle Repair" procedure.

IG "OFF" and disconnect ECTS connector and ECM connector.

Measure resistance between signal terminal of ECTS harness connector and ECTS signal terminal of ECM harness connector.

Is the measured resistance within specification ?

	▶ Go to "Ground Circuit Inspection" procedure.
	▶ Repair open in harness and go to "Verification of Vehicle Repair" procedure.

IG "OFF" and disconnect ECTS connector and then IG "ON".

Measure voltage between signal terminal of ECTS harness connector and chassis ground.(Measurement "A")

Measure voltage between signal and ground terminals of ECTS harness connector.(Measurement "B")

Is the measured voltage within specification ?

	▶ Go to "Component Inspection" procedure.
	▶ Repair contact resistance or open in harness and go to "Verification of Vehicle Repair" procedure.