DATC -Dual Automatic Temperature Control - Centennial / Equus Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company.

2 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. System layout APT : Automotive Pressure Transducer CONTROL KIT & UNIT COOLING MODULE HOSE & PIPE ECV COMP (Clutch less) HVAC AUTO DEFOG SENSOR APT

3 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Assist DEF actuator Inlet/Outlet Actuator Air Filter Cluster ionizer DATC module MODE actuator TEMP actuator (Passenger) TEMP actuator (Driver) Center Console TEMP actuator Center Console TEMP actuator-A Components HVAC (Heating Ventilation Air Conditioning)

4 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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, VI Variable Swash Plate Compressor

5 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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

6 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company With Mechanical Control Valve (VS) With Electric Control Valve (VSX) Comparison

7 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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

8 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. VehicleLayout BH VI ADS AQS REAR CONTROL Cluster ionizer ADS AQS Cluster ionizer OPT STD 23 PIN 28 PIN Components (Control module) ADS : Auto Defrost Sensor AQS : Air Quality Sensor

9 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. ItemsFunctionLocation Fin thermo sensor It opens and closes according to the evaporator temperature, thereby switching off and on the compressor Photo sensor The photo sensor is located close to the driver side defrost air duct. In response to photo intensity level in the vehicle, the sensor will send corresponding signal to the control module to control the blower level and discharge temperature Inner temp. sensor (front) To compensate DATC control with detected temperature Inner temp. sensor (rear) Components (input)

10 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. ItemsFunctionLocation Ambient sensor The ambient temperature sensor is located in front of the condenser fan shroud. This sensor detects the temperature of outside air and sends voltage signals to the controller. Auto defogger sensor It detects the humidity on the surface of front window shield in advance and operates the In/Out air, auxiliary DEF door, blower wind amount increasing, air con On and Max DEF sequentially to reduce humidity and remove it in advance AQS AQS detects exhaust gas of neighboring vehicles and intercepts automatically APT It senses the pressure of the refrigerant by a linear voltage output directly proportional to applied pressure to operate compressor ON/OFF. Components (input)

11 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Vent S/W (ON/OFF) Temp. controller Components (rear vent switch) - Operation : Blow to rear depends on vent S/W ON/OFF, Temp. controlled by temp. controller

12 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 322 Components (Rear controller) - Operation : Control front temp. and mode by rear controller Dual mode canceled during rear controller operation Communicated with DATC through serial communication Rear controller temp. control is prior to front control

13 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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

14 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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 Before After Auto defrost Sensor

15 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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 Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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 Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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 Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Operation Method Keep pressing MODE and DUAL button Temp. unit change ( o F) Temp. unit change

19 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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

20 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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

21 DATC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. 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.