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 all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of vehicle Repair" procedure.
	▶ Go to "ECTS, IATS Signal Circuit Inaspection" procedure.

IG "OFF" & Disconnect ECTS, IATS connector.

IG "ON".

Measure voltage between Pin No.3 (signal) terminal of ECTS harness connector and chassis ground.

Measure voltage between Pin No.3 (signal) terminal of IATS harness connector and chassis ground.

Is the measured voltage within specification?

	▶ Go to "ECTS, IATS Ground Circuit Inspection" procedure.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedue.

IG "OFF" & Disconnect ECTS, IATS connector.

IG "ON".

Measure voltage between Pin No.3 (signal) terminal of ECTS harness connector and chassis ground.(A)

Measure voltage between Pin No.3(Signal) terminal and Pin No.1(Ground) terminal of the ECTS.(B)

Measure voltage between Pin No.3 (signal) terminal of IATS harness connector and chassis ground.(A)

Measure voltage between Pin No.3(Signal) terminal and Pin No.4(Ground) terminal of the IATS.(B)

Is the measured voltage within specification?

	▶ Go to "Component Inspection" procedure.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedue.