Many malfunctions in the electrical system are caused by poor connection. 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.
	▶ Perform following procedures.

Ignition "OFF"

Disconnect Driver Air Mix Potentiometer(actuator) and A/C control module main harness connector.

Ignition "ON"

Measure voltage between Signal(F/B) terminal of Driver Air Mix Potentiometer(actuator) harness connector and chassis ground.

Is measured value within specification?

	▶ Go to "Ground circuit Inspection" procedure.
	▶ Check for open in harness. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

Ignition "OFF"

Disconnect Driver Air Mix Potentiometer(actuator)and A/C control module main harness connector.

Measure resistance between Sensor ground(-) terminal of Driver Air Mix Potentiometer(actuator) harness connector and Sensor ground(-) terminal of A/C control module harness connector.

Is measured value within specification?

	▶ Go to "Component inspection" procedure .
	▶ Check for open in harness. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.