7138744

Component Inspection

■ Check Passenger Temperature Actuator(Air mix potentiometer)

Ignition "OFF"

Disconnect Passenger Temperature Actuator(Air mix potentiometer) and A/C control Module main harness connector.

Connect (+) terminal of battery to WARM(+) of Passenger Temperature Actuator(Air mix potentiometer) and (-) terminal to COOL(-) .(Component side)

Verify that the temperature actuator operates to the WARM position.

Verify that the 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 Passenger Temperature Actuator(Air mix potentiometer) and check for proper operation. If the problem is corrected, replace Passenger Temperature Actuator(Air mix potentiometer) and then go to "Verification of Vehicle Repair" procedure.

■ Check potentiometer

Ignition "OFF"

Connect Passenger Temperature Actuator(Air mix potentiometer) and A/C control Module main harness connector.

Ignition "ON"

10.

Measure voltage between Signal(F/B) terminal of Passenger Temperature Actuator(Air mix potentiometer) harness connector and Sensor ground(-) terminal of A/C-Module 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 Passenger Temperature 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 Passenger Temperature Actuator(Air mix potentiometer) and check for proper operation. If the problem is corrected, replace Passenger Temperature Actuator(Air mix potentiometer) and then go to "Verification of Vehicle Repair" procedure.