Copyright by Hyundai Motor Company. All rights reserved. DATC -Dual Automatic Temperature Control -

2 DATC Introduction Adopted ECV for enhance air conditioning efficiency and durability. Adopted ECV for enhance air conditioning efficiency and durability. Apply to auto defroster in order to Improve for customer satisfaction. Apply to auto defroster in order to Improve for customer satisfaction. Enhance both convenience and goods design through Multimedia system. Enhance both convenience and goods design through Multimedia system. Construction of the air conditioning system via CAN communication ECV : Electric Control Variable Compressor

3 DATC Electric Control Variable Swash Plate Compressor Adopted ECV (Electric Control Valve), possible to precise control from zero to maximum at the swash plate. Delete the Magnetic clutch Auto defrost System Improvement both drivers sight and comfortable interior of the vehicle by means of remove humidity and delete moisture were detected by auto defrost sensor on the windshield in advanced, Uneven Cooling Fan Equipped with an uneven fan blade in order to reduce a cooling fan noise New Technology Display the blade : even space Display the blade : uneven space

4 DATC HVAC Assembly Blower Assembly Cooling Module Assembly APT Construction APT : Automotive Pressure Transducer

5 DATC Components Assist DEF Actuator Inlet/Outlet Actuator Air Filter DATC Module MODE Actuator TEMP Actuator (Passenger) TEMP Actuator (Driver) Center Console TEMP Actuator Center Console TEMP Actuator-A HVAC (Heating Ventilation Air Conditioning)

6 DATC With Mechanical Control Valve (VS) Control Valve (Mechanical Type) Magnetic Clutch Pulley (Steel) With Electric Control Valve (VSX) Control Valve (Electric Type ) Pulley (Plastic) SectionVSVSX Control ValveMechanical Control ValveElectric Control Valve Magnetic clutchAdoptedNon Outlet Temp. controlVariable controlVariable control in detail Applied MotelNF, TG, HD, FD (i30)BH Variable Swash Plate Compressor

7 DATC A/C OFF Mode Control A/C ON & Variable Control Control room (Pressure Up) Suction room Exhaust room Swash Plate Power OFF Check V/V Cut off Power ON Check V/V Cut off Control room (Pressure Down) Electric Control Valve

8 DATC With Mechanical Control Valve (VS) With Electric Control Valve (VSX) Comparison

9 DATC Torque limiter - Operation : To transmit pulley torque to compressor drive shaft that is connected hub assembly. (All time operation) - Purpose : Protect not only engine belt but also engine stall from compressor stick or overload due to be broken the limiter Pulley Torque Limiter Damper Bearing Hub Assembly Stop to Hub rotation Broken Part Only rotating inner limiter with pulley Normal Broken

10 DATC Control Block Diagram ECV (Electric Control Valve) In-car Temp. Sensor Ambient Temp. Photo Sensor Humidity Sensor Fin thermo Sensor DATC Module ECV IC CAN Comm. Line (Body Electric)CAN Comm. Line (Power train) Cluster Module VSX Compressor ECV Duty output A/C Cut-off signal A/C Switch On signal Actuator & Motor control HVAC System Engine ECM

11 DATC Diagnosis Flow Chart Blow on hot air Check normal operation of A/C Change the Mode ( Temp. Low, Second Step, Vent), after that confirm the outlet ventilation of condition Check operation for compressor ECV Output On ECV Output OFF Check the ECV output Check the A/C Cut-Off input signal whether or not Check the ECV component Check both pin themo sensor and APT sensor Check the input for CAN Data Check a defect with self diagnosis Do to self-diagnosis DATC with scan tool Check the ECV output

12 DATC Inspection of ECV Duty Measure voltage or duty wave form between No.3 (ECV+) and No.15 (ECV-) at the DATC Module in A connector. By using actuator test for DATC, check both ECV duty output and operation ECV (+) ECV (-) A connector B connector ECV DutyNormal Voltage MAXAbout 12V MIN ~ MAXAbout 4V ~ 12V MINAbout 4V

13 DATC Check the input signal for A/C Cut-off To check voltage of 20 pin (A/C Cut-off signal) which of connector in the DATC Module. A/C On state. A connectorB connector C connector A/C ONA/C OFF Under 1VOver10V Input terminal of A/C Cut-off signal Standard Voltage See over 10V, it is controlled by ECM under the A/C Off circumstance so that should check the air conditioning which is about those Cut-off condition.

14 DATC Auto defrost System - Feature Auto defrost Sensor Put humidity into frequency DATC Module Dehumidify Control - Inlet/Outlet - Assist. DEF door - Blower airflow - A/C ON - MAX DEF Rain sensor

15 DATC Airflow & Temp. control Auto Defrost Control (Humidity Control) Humidity Dehumidify Up Humidity Fresh (Outlet) Assist DEF Control Outlet Airflow Up A/C ON Main DEF Control MAX DEF Light point of the auto defrost indicator (AV Monitor) Auto Defrost System – Operating Principle

16 DATC Control Condition Auto Defrost FunctionSelect Manual while auto defrost ON Auto defrost Operation (. X) OperationDISPLAY & INDICATIONOperationDISPLAY & INDICATION Inlet/ Outlet Auto Turn outlet mode Display previous status Impossible to select Blink three times at the auto defrost symbol. Manual A/C Auto A/C ON Manual Blower Motor Auto Operate high voltage between AUTO control voltage and defrost voltage. Display auto defrost operation status Prior to manual control Manual X (Prior to manual) Keep on manual control status. Display manual control status. MODE Airflow Auto DEF Operation - Before display the AUTO defrost SYMBOL : Display MODE operation -After display the AUTO defrost SYMBOL : Display MODE operation off Prior to manual control Display manual select mode after 3 seconds, and then blink three times at the auto defrost symbol. Manual X (Prior to manual) Keep on manual control status System Off (A/C Off) - Not operate auto defrost logic (AUTO defrost SYMBOL off) - Inlet/Outlet : Change the outlet mode & Assist DEF door keep on the present mode - MODE : Keep on previous status (Even Off mode, display the DEF operation while working on DEF depend on auto defrost) Auto defrost System – Operation Note) : Operate X : Not operate

17 DATC Example) Display the fail code Diagnosis Press Auto Press Off Keep pressing Off S/W and push mode S/W more than 4times within 2sec. Self diagnosis item check (Continuous operation) Self diagnosis item check (Step operation) Return to original condition Ignition switch Off On CodeContentsFail - Safe 00Normal 11In-Car sensor open circuitSet up 25 12In-Car sensor short to ground 13Ambient sensor open circuitSet up 20

18 DATC Operation Method Select DEF mode after push DEFROST button. Keep pressing the A/C button and push intake button 5 times within 3 seconds. Intake indicator will be on for 0.5 sec. and off for 1.5 sec. under the normal condition. Diagnosis (DEF Logic Set up/Release) FunctionDEF / MAXOFF Logic Select A/COnOff IntakeFresh (Outside air) Logic Cancel A/CPreviousOff IntakePrevious