8084677

Component Inspection

■ Check driver temperature control actuator

Ignition "OFF"

Disconnect driver temperature control actuator and connect A/C control unit main harness connector.

Connect (+) terminal of battery to WARM(+) of driver temperature control actuator and (-) terminal to COOL(-) .(Component side)

Verify that the Air mix actuator(Temperature actuator) operates to the WARM position.

Verify that the Air mix actuator(Temperature actuator) operates to the COOL position with reverse connecting.( COOL(+) and WARM(-) ) . (Component side)

Specification : Refer the specifications in Fig.1)

Fig.1)

Actuator harness	WARM(+)	COOL(-)	Door position
Battery terminal	12 V	ground	Max.warm
Battery terminal	ground	12 V	Max.cool

Fig.1) ※ Function of the actuator motor according to terminal connection type. (observe safety regulations)

Is "Door position" display near the specified value?

	▶ Go to "Check potentiometer" procedure.
	▶ Substitute with a known-good driver temperature control actuator and check for proper operation. If the problem is corrected, replace driver temperature control actuator and then go to "Verification of Vehicle Repair" procedure.

■ Check potentiometer

Ignition "OFF"

Connect driver temperature control actuator and A/C control unit main harness connector.

Ignition "ON"

10.

Measure voltage between Signal(F/B) terminal of driver temperature control actuator harness connector and Sensor ground(-) terminal of A/C-ECU harness connector .(Component side)

Specification : Refer the specifications in Fig.2)

Fig.2)

Door position	Voltage
Max. cool	0.3±0.15V
Max. warm	4.7±0.15V

Fig.2) ※ Voltage value of temperature control actuator(Air mix potentiometer) as a function of temp door position.

11.

Is "voltage" display near the specified value?

	▶ Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Substitute with a known-good driver temperature control actuator and check for proper operation. If the problem is corrected, replace driver temperature control actuator and then go to "Verification of Vehicle Repair" procedure.