Published by Hyundai Motor company, september 2005 Centennial AIR CONDITIONING SYSTEM

2 General Vehicle Air Mixture System FLOOR DEF VENT Blower Motor A/C Evaporator Heater Core Air MIX. DOOR M CENTENNIAL Air Mixture System Blower MotorA/C Evaporator Heater Core Driver side Air MIX. Door DEF VENT FLOOR VENT DEF Passenger Side Air MIX. DR M

3 AIR CONDITIONING SYSTEM Parts location A : A/C RELAY B : AQS SENSOR C : AMB. SENOSR D : PHOTO SENSOR E : FIN THERMO SENSOR F : IN CAR SENSOR G : LOW BLOWER RELAY H : Hi BLOWER RELAY I : ENG. COOLANT TEMPERATURE SENSOR J : HUMIDITY SENSOR A J B C D E F G H I

4 AIR CONDITIONING SYSTEM Front control panel

5 AIR CONDITIONING SYSTEM Rear control panel A / V MUTEPWR MODE MTRTUNEVOL A/C TEMP A I R C O NAUTO LO HI

6 AIR CONDITIONING SYSTEM Rear Control FATCMFATCM CONTROL PNL/SW IN-CAR SENSOR AMB. SENSOR PHOTO SENSOR ECT SENSOR HUMIDITY SENSOR AQS SENSOR C / LIGHTER SW RR. A/C SW RR. AUTO VENT T/SW Fin T/ SENSOR RR. VENT SW BATTERY VOLTAGE D/SIDE air direction control motor LCD PNL DISPLAY P/SIDE TEMP. CONTROL MOT D/SIDE TEMP. CONTROL MOT. IN/OUT CONTROL MOT. BLOWER MOTOR T/R BASE P/SIDE air direction control motor Triple SW Voltage Out RR. Temp control motor RR. Vent motor RR. Exhaust motor Rear Blower Mot. RR. Air direction control mot. A/c system input & output

7 AIR CONDITIONING SYSTEM Condenser R-134A, PARALLEL FLOW TYPE Function : The condenser changes the refrigerant from the of high temperature, high pressure to the of high temperature, high pressure. Function : The condenser changes the refrigerant from the vapor of high temperature, high pressure to the liquid of high temperature, high pressure.

8 AIR CONDITIONING SYSTEM Compressor (swash plate type)

9 AIR CONDITIONING SYSTEM Evaporator unit The evaporator receives the cold, low-pressure atomize liquid refrigerant from the expansion valve. As this cold refrigerant passes through the coils of the evaporator, which vaporizes and absorbs heat from the passenger compartment.

10 AIR CONDITIONING SYSTEM Evaporator air filter 1. Description 2. Life time Filter replacement period is 5,000~12,000km. But this can be shorten if the road condition is bad causing more dust and black smoke in the air. 3. How to replace -. Remove the glove box. -. Pull the locking part of the air filter cover. Employing combination filter, dust and odor in the air is effectively removed.

11 AIR CONDITIONING SYSTEM Water temperature sensor Water temperature sensor attached to the heater core inlet tube detects the coolant temperature in the heater core and sends the signal to the controller. The signal becomes data for the controller to carry out CELO function by comparing the differences among the setting temperature, indoor temperature and outdoor temperature.

12 AIR CONDITIONING SYSTEM CELO (Cold Engine Lock Out) function Operating conditions - AT AUTO MODE - SELECT MODE : AT BI-LEVEL, FLOOR MODE - SETTING TEMP : 3 higher than indoor temp. - WTS : under 58 Under the theses conditions, defrost mode operates and blower motor runs low speed to avoid a direct contact of cold air from outside with occupants. Function prohibition - 10 Minutes after Ignition ON - When the detected temperature by WTS exceeds When a BLOWER SWITCH is selected - When DEFROST SWITCH is selected

13 AIR CONDITIONING SYSTEM A/ C fin thermo switch A/CON RELAY Triple SW ECM FATCMFATCM IG 2 M B Fin thermo SW OFF (0.5 ) = Voltage off ON (3.5 ) = Voltage out from FATCM

14 AIR CONDITIONING SYSTEM FATCM + Photo sensor The photo sensor is located on the driver side crash pad assembly. The photo sensor contains a photovoltaic (sensitive to sunlight) diode. Pin No.Pin characteristic 1Driver side photovoltaic out 2Power source5V 3Passenger side photovoltaic out 1 23 Sensor inspection

15 AIR CONDITIONING SYSTEM The in-car sensor senses the passenger compartment temperature, changes the resistance value, and enters the corresponding voltage into the automatic temperature control module (FATC). PIN NOPin characteristic 1Sensor Ground 2IG. Power 3Sensor Output 4Motor Earth In-car sensor

16 AIR CONDITIONING SYSTEM 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.

17 AIR CONDITIONING SYSTEM Ambient sensor FATC MICOMMICOM 5V SENSOR GROUND VOLTAGE DETECTION REFERERANCE VOLTAGE * Resistance between a & b Resistance characteristic: NTC (negative thermal coefficient) Resistance ( ) Temp Resistance ( ) Temp.

18 AIR CONDITIONING SYSTEM AQS (Air Quality System) Air Quality System(AQS) monitors the quality of outside air and prevents the occupants from the harmful gas fumes flowing into the vehicle. The Air Quality System detects exhaust gas of neighboring vehicles and intercepts automatically. AQS controls the inlet of car automatically and can be easily installed to the existing vehicle. Manual operation is also available. AQS Sensor

19 AIR CONDITIONING SYSTEM AQS(Air Quality System) NO X, SO 2 C X H Y, CO PIN NO 3 characteristic - When gas detected, : Output should be 0V. - When Normal condition, : Output should be 5V.

20 AIR CONDITIONING SYSTEM Humidity sensor HUMIDITY SENSOR detects humidity of inside passenger room. This sensor converts humidity into the voltage signal and sends the signal to the FATC controller.

21 AIR CONDITIONING SYSTEM Humidity sensor PIN NO 3 Sensor Output Characteristic

22 AIR CONDITIONING SYSTEM Triple switch If the pressure of a/con system is increasing, the middle pressure switch of TRIPLE SWITCH is activated sending voltage signal to engine ECM. And than A/C relay off. LOW & HIGH (1) LOW & HIGH (2)MEDIUM (3) MEDIUM (4)

23 AIR CONDITIONING SYSTEM Triple switch SwitchPressureSW ONREMARKS Hi. PRS SW (Kg/ ) Lo. PRS SW (Kg/ ) 32.0±2.0ON - For system ON/OFF - For Cooling 2.0±2.0ON Medium SW (Kg/ ) 15.5±0.8ONFor Cooling Triple switch operating pressure LowHigh (1) (3) (4) (2) Electric diagram Medium ON OFF 2.0±2.02.3±0.25 ON OFF 32.0± ±2.0 ON OFF 11.5± ±0.8 High. PRS SW (Kg/ )MEDIUM SW (Kg/ )Low. PRS. SW (Kg/ )

24 AIR CONDITIONING SYSTEM Triple switch circuit MM A/C COMP. MID HIGH/ LOW A/C output B+ A/C ON input A/C pressure switch input FIN SENSOR A/C RELAY CON. FAN A/C relay control ECM FATC CONTROL MODULE

25 AIR CONDITIONING SYSTEM Temperature control door mode actuator location Driver side mode door Actuator Passenger side mode door Actuator Rear Console mode door Actuator Passenger side Rear Console Driver side air-mix door Actuator

26 AIR CONDITIONING SYSTEM Temperature control door mode actuator (driver side, passengers side, rear vent side) M M Cool control12 volt2 Hot control12 volt1 Air stateVoltagePin No Actuator Pin Characteristic Door PositionOutlet VoltageError Detect MAX HOT0.3±0.15 V Lower than 0.08 V Higher than 4.9 V MAX COOL4.7±0.15 V Pin No4 Characteristic

27 AIR CONDITIONING SYSTEM Air directional control mode door actuator M M Pin No4 Characteristic Door Position Output Voltage Door Opening(%) Error Detect Vent0.3±0.15 V0 Low Voltage : Lower than.92 V High Voltage : Higher than 4.92 V Bi-level(1)1.35±0.4 V20 Bi-level(2)2.25±0.4 V40 Floor3.0±0.4 V60 MIX.4.6±0.4 V80 DEF.4.7±0.4 V100

28 AIR CONDITIONING SYSTEM Rear vent actuator M M Rear Vent Actuator Pin NO1 + : ON Pin NO2 + : OFF Rear Vent Actuator Inspection Pin NO 1Pin NO 2ON/OFF +- Rear Vent Mode Door ON -+ Rear Vent Mode Door OFF

29 AIR CONDITIONING SYSTEM Intake actuator FATCM 12 M M 1 2 Intake Actuator Inspection Input Actuator Operation Pin No. 1Pin No. 2 -+Fresh +-Recirculation

30 AIR CONDITIONING SYSTEM Blower motor speed control Power TransistorHigh Speed Relay

31 AIR CONDITIONING SYSTEM Blower motor speed control v Blower Relay M Battery IG2 Blower Motor High Speed Relay Measure voltage POWER TR Working Voltage 1st speed : 1.1V(118mA) 6th speed : 1.7V(166mA ) FATCMFATCM

32 AIR CONDITIONING SYSTEM Diagnosis Using Hi-scan pro The FATC module communicates with high-scan and diagnosis test feature will detect electrical malfunction and provide error codes for system components with suspected failures.

33 AIR CONDITIONING SYSTEM Diagnostic trouble code

34 AIR CONDITIONING SYSTEM A/C sensor fail safe mode NOITEMDEFECT SITUATIONFAIL SAFE 1INCAR SENSOROPEN OR SHORT CIRCUIT FIXED TEMPERATURE 25 2AMBIEANT SENSOROPEN OR SHORT CIRCUIT FIXED TEMPERATURE 20 3FIN THERMO SENSOROPEN OR SHORT CIRCUIT FIXED TEMPERATURE -2 4 AIR MIX TEMP. DOOR POSITION SENSOR (for Temperature control) OPEN OR SHORT CIRCUIT SET TEMP 17 ~ 24.5 : FIXED MAX COOL POSITION SET TEMP 25 ~ 32 : FIXED MAX HOT POSITION 5ECT SENSOROPEN OR SHORT CIRCUIT For 10minutes worm control by auto low speed. 6 MODE DOOR SW(AUTO & MANUAL) OPEN OR SHORT CIRCUIT when vent mode : Fix Vent Position when Bi-level & MIX mode : Fix Def. Position 7HUMIDITY SENSOROPEN OR SHORT CIRCUITNo control