HEATER & AIR CONDITIONING CONTROL SYSTEM

Transcription

1 VETILTI, HETER & IR CDITIER SECTI HC HETER & IR CDITII CTRL SYSTE C D CTETS E UTTIC IR CDITII RECUTI... 5 RECUTIS... 5 recaution for Supplemental Restraint System (SRS) "IR " and "SET ELT RE-TE- SIER"...5 SYSTE DESCRITI... 6 CET RTS... 6 Component arts Location...6 Component Description...7 /C UIT SSELY...7 /C UIT SSELY : spirator...7 /C UIT SSELY : Intake Sensor...7 /C UIT SSELY : ir ix Door otor...7 /C UIT SSELY : ode Door otor...8 /C UIT SSELY : Intake Door otor...8 /C UIT SSELY : lower otor...8 /C UIT SSELY : ower Transistor...8 ulti Display Unit...9 /C uto mp....9 C...9 EC...9 ID E/R...9 mbient Sensor...9 In-vehicle Sensor...9 Sunload Sensor...9 Refrigerant ressure Sensor...9 agnet Clutch...10 SYSTE...11 System Diagram...11 System Description...11 Temperature Control...12 ir utlet Control...13 ir Flow Control...13 ir Inlet Control...14 Compressor Control...14 Door Control...15 EC ode Control...18 Fail-safe...18 ERTI...20 Switch ame and Function...20 DISIS SYSTE (/C UT.)...23 Description...23 CSULT Function...23 DISIS SYSTE (C)...26 C ITE...26 C ITE : CSULT Function (C - C ITE)...26 IR CDITIER...27 IR CDITIER : CSULT Function (C - IR CDITIER) (utomatic /C)...27 ECU DISIS IFRTI...29 /C UT Reference Value...29 Fail-safe...32 DTC Index...32 ULTI DISLY UIT, C, EC, ID E/R...33 List of ECU Reference...33 WIRI DIR...34 UTTIC IR CDITII SYSTE...34 Wiring Diagram...34 SIC ISECTI...37 DISIS D REIR WRK FLW...37 Work Flow...37 ERTI ISECTI...40 F H HC K L HC-1

2 Work rocedure SYSTE SETTI Temperature Setting Trimmer Inlet ort emory Function (REC) Inlet ort emory Function (FRE) Foot osition Setting Trimmer DR TR STRTI SITI RE- SET Description Work rocedure DTC/CIRCUIT DISIS U1000 C C CIRCUIT Description DTC Logic Diagnosis rocedure U1010 CTRL UIT (C) Description DTC Logic Diagnosis rocedure , 2579 I-VEHICLE SESR DTC Logic Diagnosis rocedure Component Inspection , 257C IET SESR DTC Logic Diagnosis rocedure Component Inspection , 2582 ITKE SESR DTC Logic Diagnosis rocedure Component Inspection , 2631 SULD SESR DTC Logic Diagnosis rocedure Component Inspection , 271 ITKE DR TR DTC Logic Diagnosis rocedure Component Inspection (R) Component Inspection (otor) , 273, 274, 275 IR IX DR TR DTC Logic Diagnosis rocedure Component Inspection , 277, 278, 279 DE DR TR DTC Logic Diagnosis rocedure Component Inspection WER SULY D RUD CIRCUIT /C UT /C UT. : Diagnosis rocedure /C SIL Component Function Check Diagnosis rocedure LWER F SIL Component Function Check Diagnosis rocedure LWER TR Diagnosis rocedure Component Inspection (lower otor) Component Inspection (lower Relay) ET CLUTCH Component Function Check Diagnosis rocedure SYT DISIS UTTIC IR CDITIER SYSTE Symptom Table ISUFFICIET CLI Description Diagnosis rocedure ISUFFICIET HETI Description Diagnosis rocedure CRESSR DES T ERTE Description Diagnosis rocedure REVL D ISTLLTI CTRLLER Removal and Installation /C UT Removal and Installation IET SESR Removal and Installation I-VEHICLE SESR Removal and Installation SULD SESR Removal and Installation ITKE SESR Exploded View Removal and Installation REFRIERT RESSURE SESR HC-2

3 Exploded View...90 Removal and Installation...90 IR CDITIER : CSULT Function (C - IR CDITIER) (anual /C) WER TRSISTR...91 Exploded View...91 Removal and Installation...91 DR TR...92 Exploded View...92 ITKE DR TR...93 ITKE DR TR : Removal and Installation...93 DE DR TR...93 DE DR TR : Removal and Installation...93 IR IX DR TR...94 IR IX DR TR : Removal and Installation...94 UL IR CDITII RECUTI...95 RECUTIS...95 recaution for Supplemental Restraint System (SRS) "IR " and "SET ELT RE-TE- SIER"...95 SYSTE DESCRITI...96 CET RTS...96 Component art Location...96 Component Description...96 /C UIT SSELY...97 /C UIT SSELY : Thermo Control mp /C UIT SSELY : lower otor...97 /C UIT SSELY : lower Fan Resistor...97 /C Control...97 C...98 EC...98 ID E/R...98 Refrigerant ressure Sensor...98 agnet Clutch...98 SYSTE...99 System Diagram...99 System Description...99 Compressor Control...99 Door Control ERTI Switch ame and Function DISIS SYSTE (C) Description C ITE C ITE : CSULT Function (C - C ITE) IR CDITIER HC-3 ECU DISIS IFRTI C, EC, ID E/R List of ECU Reference WIRI DIR UL IR CDITII SYSTE Wiring Diagram SIC ISECTI DISIS D REIR WRK FLW Work Flow ERTI ISECTI Work rocedure DTC/CIRCUIT DISIS /C SWITCH Component Function Check Diagnosis rocedure LWER F SIL Component Function Check Diagnosis rocedure THER CTRL LIFIER Component Function Check Diagnosis rocedure DEFRSTER SITI SIL Component Function Check Diagnosis rocedure /C IDICTR Diagnosis rocedure LWER TR Diagnosis rocedure Component Inspection (lower otor) Component Inspection (lower Relay) Component Inspection (lower Fan Resistor) Component Inspection (Fan Switch) ET CLUTCH Component Function Check Diagnosis rocedure SYT DISIS UL IR CDITII SYSTE Symptom Table ISUFFICIET CLI Description Diagnosis rocedure ISUFFICIET HETI C D E F H HC K L

4 Description Diagnosis rocedure CRESSR DES T ERTE Description Diagnosis rocedure REVL D ISTLLTI /C CTRL Exploded View Removal and Installation THER CTRL LIFIER Removal and Installation REFRIERT RESSURE SESR Exploded View Removal and Installation LWER F RESISTR Exploded View Removal and Installation DR CLE Exploded View ITKE DR CLE ITKE DR CLE : Removal and Installation. 139 DE DR CLE DE DR CLE : Removal and Installation. 140 IR IX DR CLE IR IX DR CLE : Removal and Installation. 140 HC-4

5 RECUTIS < RECUTI > [UTTIC IR CDITII] RECUTI RECUTIS recaution for Supplemental Restraint System (SRS) "IR " and "SET ELT RE-TESIER" IFID: The Supplemental Restraint System such as IR and SET ELT RE-TESIER, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the SRS IR and SET ELT of this Service anual. WRI: lways observe the following items for preventing accidental activation. To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision that would result in air bag inflation, all maintenance must be performed by an authorized ISS/IFIITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and ir ag odule, see SRS IR. ever use electrical test equipment on any circuit related to the SRS unless instructed to in this Service anual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. RECUTIS WHE USI WER TLS (IR R ELECTRIC) D HERS WRI: lways observe the following items for preventing accidental activation. When working near the ir ag Diagnosis Sensor Unit or other ir ag System sensors with the ignition or engine running, never use air or electric power tools or strike near the sensor(s) with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. When using air or electric power tools or hammers, always switch the ignition FF, disconnect the battery, and wait at least 3 minutes before performing any service. C D E F H HC K L HC-5

6 CET RTS < SYSTE DESCRITI > [UTTIC IR CDITII] SYSTE DESCRITI CET RTS Component arts Location IFID: II1048ZZ 1. C Refer to CS-6, "DY CTRL SYSTE : Component arts Location". 4. mbient sensor 5. EC Refer to EC-16, "EIE C- TRL SYSTE : Component arts Location". 2. agnet clutch 3. Refrigerant pressure sensor 6. ID E/R Refer to CS-5, "Component arts Location". 7. ulti display unit 8. Intake door motor 9. ir mix door motor 10. Intake sensor 11. In-vehicle sensor 12. ower transistor 13. spirator 14. /C auto amp. 15. lower motor 16. ode door motor 17. Sunload sensor HC-6

7 CET RTS < SYSTE DESCRITI > [UTTIC IR CDITII]. Left side of /C unit assembly. Instrument lower panel LH is removed C. ack side of /C unit assembly D. ulti display unit is removed E. Right side of /C unit assembly F. Right side of switch panel Component Description IFID: /C unit assembly ulti display unit /C auto amp. C EC ID E/R mbient sensor In-vehicle sensor Sunload sensor Refrigerant pressure sensor agnet clutch /C UIT SSELY Component spirator /C UIT SSELY : spirator Intake sensor ir mix door motor ode door motor Intake door motor lower motor ower transistor The aspirator generates the vacuum by the air blown from the /C unit assembly and draws the air of the passenger room to the invehicle sensor area via the aspirator duct. Description HC-7 HC-7 HC-7 HC-8 HC-8 HC-8 HC-8 HC-9 HC-9 HC-9 HC-9 HC-9 HC-9 HC-9 HC-9 HC-9 HC-10 IFID: C D E F H HC K L /C UIT SSELY : Intake Sensor IFID: Intake sensor measures temperature of evaporator fin temperature. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases. /C UIT SSELY : ir ix Door otor RI1804E IFID: The step motor system is adopted for air mix door motor. When a drive signal is input from /C auto amp. to door motor, a step motor built into the door motor rotates according to the drive signal, and then stops at the target door position. Refer to HC-15, "Door Control". Rotation of motor is transmitted to air mix door (upper air mix door and lower air mix door) by lod and lever. ir flow temperature is switched. HC-7

8 CET RTS < SYSTE DESCRITI > [UTTIC IR CDITII] /C UIT SSELY : ode Door otor IFID: The step motor system is adopted for mode door motor. When a drive signal is input from /C auto amp. to door motor, a step motor built into the door motor rotates according to the drive signal, and then stops at the target door position. Refer to HC-15, "Door Control". Rotation of motor is transmitted to mode door (center ventilator and defroster door, sub defroster door, side ventilator door, and foot door) by link, lod, and lever. ir outlet is switched. /C UIT SSELY : Intake Door otor IFID: Intake door motor consists of motor that drives door and R (otentio alance Register) that detects door position. otor operates intake door according to control signal from /C auto amp. Refer to HC-15, "Door Control". Rotation of motor is transmitted to intake door by lever. ir inlet is switched. R (otentio alance Register) transmits R feedback signal to /C auto amp. according to motor position. ccording to R feedback signal, /C auto amp. monitors that motor is in an appropriate door position. /C UIT SSELY : lower otor The blower motor utilizes a brush-less motor with a rotating magnet. Quietness is improved over previous motors where the brush was the point of contact and the coil rotated. IFID: II1575ZZ ZH152H /C UIT SSELY : ower Transistor ower transistor, that uses S field effect transistor, is adopted for blower motor speed control. TE: S field effect transistor is a transistor for which the gate portion is composed of a metal electrode on an oxide layer of semiconductor. Field effect transistor is controlled by voltage, while ordinary transistor is controlled by current. Electrode of field effect transistor is called source, drain, or gate, while electrode of ordinary transistor is called emitter, collector, or base. ower transistor continuously controls voltage to blower motor, according to gate voltage from /C auto amp. This power transistor does not require a HI relay even when the maximum voltage is applied to blower motor at HI status, because voltage drop is nominal. IFID: II1634ZZ HC-8

9 CET RTS < SYSTE DESCRITI > [UTTIC IR CDITII] ulti Display Unit IFID: ulti display unit integrates display and operation switches. peration of each switch (/C operation signal) and setting status (/C EC setting signal and EC mode signal) are transmitted to /C auto amp. via C communication. peration status of air conditioning system is indicated in the display according to /C display signal that is received from /C auto amp. /C uto mp. IFID: /C auto amp. controls automatic air conditioning system by inputting and calculating signals from each sensor and each switch. /C auto amp. has self-diagnosis function. Diagnosis of automatic air conditioning system can be performed quickly. C IFID: C transmits /C signal and blower fan signal from /C auto amp. to EC via C communication line. EC IFID: EC, when receiving /C signal and blower fan signal from C, transmits /C compressor request signal to ID E/R via C communication according to status of the engine and refrigerant pressure. EC transmits engine coolant temperature signal to /C auto amp. via C communication line. ID E/R IFID: /C relay is integrated in ID E/R. ID E/R operates /C relay when /C compressor request signal is received from EC via C communication line. mbient Sensor IFID: mbient sensor measures ambient air temperature. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases. In-vehicle Sensor IFID: In-vehicle sensor measures temperature of intake air that flows through aspirator to passenger room. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases. Sunload Sensor IFID: Sunload sensor measures sunload amount. This sensor converts sunload amount to voltage signal by photodiode and transmits to /C auto amp. Refrigerant ressure Sensor IFID: DESCRITI The refrigerant pressure sensor converts high-pressure side refrigerant pressure into voltage and outputs it to EC. EC operates cooler cycle protection and cooling fan speed control according to voltage value that is input. C D E F H HC K L STRUCTURE D ERTI HC-9 I2657E

10 CET RTS < SYSTE DESCRITI > [UTTIC IR CDITII] The refrigerant pressure sensor is a capacitance type sensor. It consists of a pressure detection ares and a signal processing area. The pressure detection area, which is a variable capacity condenser, changes internal static capacitance according to pressure force. The signal processing area detects the static capacitance of the pressure detection area, converts the static capacitance into a voltage value, and transmits the voltage value to EC. agnet Clutch Compressor is driven by the magnet clutch which is magnetized by electric power supply. IFID: HC-10

11 SYSTE < SYSTE DESCRITI > [UTTIC IR CDITII] SYSTE System Diagram IFID: C D E F H HC K System Description IFID: DESCRITI utomatic air conditioning system is controlled by each function of /C auto amp., C, EC and ID E/ R. Each operation of air conditioning system is transmitted from multi display unit via C communication. /C auto amp. transmits each type of indication information to multi display unit via C communication. ulti display unit displays each type of indication information that is received. CTRL Y /C UT. HC-12, "Temperature Control" HC-13, "ir utlet Control" HC-13, "ir Flow Control" HC-14, "ir Inlet Control" HC-14, "Compressor Control" HC-15, "Door Control" HC-18, "EC ode Control" Correction for input value II1049 L mbient temperature correction - The /C auto amp. inputs the temperature detected with the ambient sensor as the ambient temperature. HC-11

12 SYSTE < SYSTE DESCRITI > [UTTIC IR CDITII] - erform the correction of the temperature detected with the ambient sensor for air conditioning control. - Select and use the initial value of ambient temperature data depending on the engine coolant temperature when turning the ignition switch from FF to. Use the detection temperature of the ambient sensor at low coolant temperature [less than approximately 56 C (133 F)]. Use the memory data (before the ignition switch is FF) when the engine is warming up [approximately 56 C (133 F) or more]. - Do not perform the correction of the ambient temperature when the detection temperature of the ambient temperature is less than approximately 20 C ( 4 F). assenger room temperature correction - The /C auto amp. inputs the temperature detected with the in-vehicle sensor as the passenger room temperature. - erform the correction of the temperature detected with the in-vehicle sensor for air conditioning control. - The /C auto amp. performs the correction so that the recognition passenger room temperature changes depending on the difference between the detected passenger room temperature and the recognition passenger room temperature. If the difference is large, the changing is early. The changing becomes slow as the difference becomes small. Intake temperature correction - The /C auto amp. inputs the temperature detected with the intake sensor as the intake temperature. - erform the correction of the temperature detected with the intake sensor for air conditioning control. - The /C auto amp. performs the correction so that the recognition intake temperature changes depending on the difference between the detected intake temperature and the recognition intake temperature. If the difference is large, the changing is early. The changing becomes slow as the difference becomes small. Sunload amount correction - The /C auto amp. inputs the sunload amount detected with the sunload sensor. - erform the correction of the sunload amount detected with the sunload sensor for air conditioning control. - When the sunload amount suddenly changes, for example when entering a tunnel, perform the correction so that the recognition sunload amount of the /C auto amp. changes slowly. Set temperature correction - /C auto amp. controls The /C auto amp. performs the correction to the target temperature set by the temperature control switch so as to match the temperature felt by the passengers depending on the ambient temperature detected with the ambient sensor and controls it so that the interior air temperature is always the most suitable. CTRL Y C HC-14, "Compressor Control" CTRL Y EC HC-14, "Compressor Control" Cooling fan control. Refer to EC-54, "CLI F CTRL : System Description". CTRL Y ID E/R HC-14, "Compressor Control" Cooling fan control. Refer to CS-9, "WER CTRL SYSTE : System Description". Temperature Control When ignition switch is in the position, /C auto amp. always automatically controls temperature regardless of air conditioner operational state. /C auto amp. calculates the target air mix door opening angle depending on set temperature, in-vehicle temperature, ambient temperature, and sunload. ir mix door is controlled depending on the comparison of current air mix door opening angle and target air mix door opening angle. Regardless of in-vehicle temperature, ambient temperature, and sunload, air mix door is fixed at the fully cold position when set temperature is 18 C (60 F), and at the fully hot position when set temperature is 32 C (90 F). IFID: II0633 HC-12

13 SYSTE < SYSTE DESCRITI > [UTTIC IR CDITII] ir utlet Control While air outlet is in automatic control, /C auto amp. selects the mode door position depending on a target air mix door angle and outlet air temperature calculated from sunload. If ambient temperature is excessively low, D/F is selected to prevent windshield fogging when air outlet is set to FT. IFID: C D ir Flow Control II0710 IFID: DESCRITI /C auto amp. changes gate voltage of power transistor and controls air flow continuously. When air flow is increased, voltage of blower motor gradually increases to prevent a sudden increase in air flow. In addition to manual control and automatic control, air flow control is compose of starting fan speed control, low coolant temperature starting control, high in-vehicle temperature starting control, and blower speed control at door motor operation. UTTIC IR FLW CTRL /C auto amp. decides target air flow depending on target air mix door opening angle. /C auto amp. changes voltage of blower motor and controls air flow continuously so that air flow matches to target air flow. When air outlet is VET or /L, the minimum air flow is changed depending on sunload. E F H HC K II1129 STRTI F SEED CTRL When blower motor is activated, /C auto amp. gradually increases voltage of blower motor to prevent a sudden increase in discharge air flow. (T1 T2 = approximately 8 seconds) TE: Do not perform the starting air flow control when the discharge outlet is set to DEF. L LW CLT TEERTURE STRTI CTRL II1130 HC-13

14 SYSTE < SYSTE DESCRITI > [UTTIC IR CDITII] If the engine coolant temperature is 56 C (133 F) or less, to prevent a cold discharged air flow, /C auto amp. suspends blower motor activation for the maximum 150 seconds depending on target air mix door opening angle. fter this, voltage of blower motor is increased gradually, and blower motor is activated. F SEED CTRL T DR TR ERTI When mode door motor is activated while air flow is more than the specified value, /C auto amp. reduces temporarily fan speed so that mode door moves smoothly. HIH I- TEERTURE STRTI CTRL When evaporator temperature is high [intake air temperature sensor value is 35 C (95 F) or more], to prevent a hot discharged air flow, /C auto amp. suspends blower motor activation for approximately 3 seconds so that evaporator is cooled by refrigerant. ir Inlet Control IFID: While air inlet is in automatic control, /C auto amp. selects air inlet (fresh air intake, 20% fresh air intake, or recirculation) depending on set temperature, in-vehicle temperature, and ambient temperature. ir inlet is fixed to 80% FRE, only when the conditions are satisfied as follows: - ir inlet is FT or D/F - mbient temperature is 2 C (36 F) or less - aximum fan speed II1227 Compressor Control II0711 IFID: DESCRITI When the compressor activation condition is satisfied while blower motor is activated, /C auto amp. transmits /C signal and blower fan signal to C. C transmits the /C signal and blower fan signal to EC via C communication line. Refer to CS-12, "SIL UFFER SYSTE : System Description". EC judges the conditions of each sensor (Refrigerant pressure sensor signal, accelerator position signal, etc.), and transmits the /C compressor request signal to ID E/R via C communication line. y receiving the /C compressor request signal from EC, ID E/R turns the /C relay to, and activates the compressor. Refer to CS-6, "RELY CTRL SYSTE : System Description". CTRL Y /C UT. Low Temperature rotection Control When intake sensor detects that evaporator fin temperature is 2 C (36 F) or less, /C auto amp. requests EC to turn the compressor FF, and stops the compressor. When the air temperature returns to 3.5 C (38 F) or more, the compressor is activated. II1055 HC-14

15 SYSTE < SYSTE DESCRITI > [UTTIC IR CDITII] CTRL Y EC Compressor rotection Control at ressure alfunction When the high-pressure side value that is detected by refrigerant pressure sensor is as per the following state, EC requests ID E/R to turn /C relay FF and stops the compressor a (31.82 kg/cm 2, psi) or more (When the engine speed is less than 1,500 rpm) 2.74 a (27.95 kg/cm 2, psi) or more (When the engine speed is 1,500 rpm or more) 0.14 a (1.43 kg/cm 2, 20.3 psi) or less Compressor il Circulation Control When the engine starts while the engine coolant temperature is 56 C (133 F) or less, EC activates the compressor for approximately 6 seconds and circulates the compressor oil once. ir Conditioning Cut Control When the engine condition is high load, EC transmit /C relay FF request to ID E/R, and stops the compressor. Refer to EC-52, "IR CDITII CUT CTRL : System Description". Door Control IFID: DR TR CTRL /C auto amp. receives the detection data from each sensor. Intake door motor, when receiving control signal from /C auto amp. moves intake door to the appropriate position based on the door position detection signal of each R (otentio alance Resistor). Each motor of air mix and mode, when receiving drive signal from /C auto amp., moves each door to the appropriate position according to drive signal. DRIVE ETHD F STEI TR TYE TR Stepping motor type motor is driven by 4 pieces of drive coil that are sequentially excited. Direction of rotation is changeable by recomposing pattern of excitation. C D E F H HC K L SWITCH D THEIR CTRL FUCTI SI0971E HC-15

16 SYSTE < SYSTE DESCRITI > [UTTIC IR CDITII] II1584ZZ 1. Intake door 2. lower motor 3. In-cabin microfilter filter 4. Evaporator 5. Upper air mix door 6. Lower air mix door 7. Heater core 8. Foot door 9. Side ventilator door 10. Sub defroster door 11. Center ventilator and defroster door Fresh air intake Recirculation air Defroster Center ventilator Side ventilator Foot Rear foot * *: odels for Canada Door position Switch/dial position Center ventilator and defroster door Sub defroster door Side ventilator door Foot door Intake door Upper air mix door Lower air mix door UT switch UT HC-16

17 SYSTE < SYSTE DESCRITI > [UTTIC IR CDITII] Switch/dial position Center ventilator and defroster door Sub defroster door Side ventilator door Door position Foot door Intake door Upper air mix door Lower air mix door C D DE switch VET L /L K H FT I D/F Q E F DEF switch Intake switch Full cold 18 C (60 F) D E Temperature control dial 18.5 C (61 F) 31.5 C (89 F) UT UT Full hot 32 C (90 F) C F FF switch Q I IR DISTRIUTI H HC odels except for Canada DE/DEF setting position odels for Canada DE/DEF setting position Discharge air flow ir outlet/distribution Ventilator Center Side Foot Defroster 52.6% 47.3% 34.0% 27.7% 38.4% 19.1% 57.9% 23.0% 13.5% 42.4% 44.1% 16.3% 83.8% Discharge air flow ir outlet/distribution Ventilator Foot Center Side Front Rear Defroster 52.6% 47.3% 28.2% 25.9% 29.6% 16.3% 16.3% 43.0% 21.0% 19.7% K L HC-17

18 SYSTE < SYSTE DESCRITI > [UTTIC IR CDITII] Discharge air flow DE/DEF setting position ir outlet/distribution Ventilator Foot Center Side Front Rear Defroster 12.2% 33.1% 16.3% 38.4% 16.3% 83.8% EC ode Control IFID: DESCRITI /C auto amp. receives operation status of each switch (/C operation signal), D-DE setting status (EC mode signal), and CLITE EC setting status (/C EC setting signal) from multi display unit via C communication. /C auto amp. operates air conditioning system in EC mode, when D-DE on multi display unit is set to EC mode while air conditioning system is in automatic control. TE: For setting procedure of D-DE, refer to V-137, "ITERTED CTRL SYSTE : System Description". ctivation or deactivation of EC mode can be changed using multi display unit setting function ( CLI- TE EC ). For setting procedure, refer to V-137, "ITERTED CTRL SYSTE : System Description". CTRL UTLIE During EC mode operation, /C auto amp. changes air flow and control characteristics of air inlet, within a range that may not spoil the comfort level, lowers operation ratio of compressor, and reduces the electrical load. This reduces engine load and improved fuel economy. Refer to the following items for details of each control. ir Flow Control /C auto amp. increases voltage to power transistor gate compared to ordinary operation and reduces voltage to blower motor. This reduces air flow. Since air flow is reduced, the amount of air that passes evaporator is reduced. Increase of evaporator temperature can be moderated. Evaporator temperature is easily shifted to temperature control range for low temperature protection control. peration ratio of evaporator is reduced. Since air flow is reduced, the electrical load is reduced. lternator power output can be moderated. ir Inlet Control In the following conditions, /C auto amp. controls air inlet and increases recirculation air mixing ratio compared to ordinary operation. - mbient temperature: 25 C (77 F) or more - Temperature setting: ny temperature other than full cold [18 C (60 F)] or full hot [32 C (90 F)] - ir outlet: In automatic control - ir flow: In automatic control - ir inlet: In automatic control or in fresh air intake mode by manual control - /C switch: y increasing recirculation air mixing ratio, cooled air in passenger room is circulated in larger amount than during ordinary operation. ir temperature blowing to evaporator is maintained at a low level. Evaporator temperature increase can be moderated. Evaporator temperature is easily shifted to temperature control range for low temperature protection control. peration ratio of evaporator is reduced. Fail-safe IFID: FIL-SFE FUCTI If a communication error exists between the /C auto amp. and multi display unit for 2 seconds or longer, air conditioning is controlled under the following conditions: /C display Set temperature ir outlet : FF : Setting before communication error occurs : utomatic control HC-18

19 SYSTE < SYSTE DESCRITI > [UTTIC IR CDITII] ir flow : utomatic control ir inlet : Fresh air intake (FRE) /C switch : C D E F H HC K L HC-19

20 ERTI < SYSTE DESCRITI > [UTTIC IR CDITII] ERTI Switch ame and Function ERTI D DISLY /C Display (Display in ulti Display Unit) IFID: II1050 ir conditioning system operation status is indicated on display in multi display unit. Indication of air conditioning system varies according to display mode of multi display unit. For changing procedure of display mode, refer to V-137, "ITERTED CTRL SYSTE : System Description". - In CLITE mode: peration status of air conditioning system (setting temperature, air flow, and UT *1 ) is indicated on display when air conditioning system is turned. Setting temperature is indicated on display when DE switch is pressed while air conditioning system is FF. - In D-DE: peration status of air conditioning system (setting temperature, /C switch, and UT *2 ) is indicated on lower portion of display when air conditioning system is turned. Setting temperature is indicated on display when DE switch is pressed while air conditioning system is FF. TE: *1: UT is indicated when both air flow and air outlet are in automatic control. *2: ir Flow is indicated when air flow or air outlet is in manual control. /C Controller (ulti Display Unit) peration procedure of air conditioning system varies depending on display mode of multi display unit. For changing procedure of display mode, refer to V-137, "ITERTED CTRL SYSTE : System Description". In CLITE mode: ll operations of air conditioning system are possible. II1051ZZ 1. /C switch 2. FF switch 3. Temperature control dial 4. UT switch 5. DE switch (D/F) 6. DEF switch 7. Intake switch 8. Display 9. DE switch (FT) 10. Fan control dial 11. DE switch (/L) 12. DE switch (VET) HC-20

21 ERTI < SYSTE DESCRITI > [UTTIC IR CDITII] /C switch FF switch Temperature control dial UT switch DE switch DEF switch Compressor control (switch indicator) changes between FF each time when switch is pressed while air conditioning system is in the position. ir conditioning system turns FF and changes to the following status when switch is pressed while air conditioning system is in the position. ir outlet: Foot ir flow: FF ir inlet: Fresh air intake /C switch: FF Setting temperature can be set within a range of 18 C (60 F) 32 C (90 F) at a rate of 0.5 C (1 F) per adjustment using this dial. Clockwise rotation: Set temperature increases Counterclockwise rotation: Set temperature decreases TE: When air conditioning system is FF position, setting temperature can be selected only while air conditioning system state (when DE switch is pressed) is indicated on the display. UT is indicated on display and air conditioning system operates according to the following setting when switch is pressed. ir outlet: utomatic control ir flow: utomatic control ir inlet: utomatic control /C switch: TE: When air outlet or air flow is manually operated while UT is indicated on display UT indication turns FF. However, automatic control continues for other functions than air outlet or air flow. When each DE switch is pressed, air outlet is switched and VET, /L, FT, or D/F * can be selected manually. (Switch indicator indicates air outlet status during automatic control.) *: ir inlet is set to fresh air intake (FRE) and /C switch turns, when D/F is selected while air conditioning system is in the position. TE: ir outlet can be changed when air conditioning system is in the FF position. ir outlet automatic control is released ( UT turns FF) when each DE switch is pressed while UT is indicated on display. DEF mode turns FF each time when switch is pressed. When switch is pressed while air conditioning system is in the position. - ir conditioning system operates according to the following setting when DEF mode is turned. ir outlet: DEF ir flow: revious setting before turning DEF mode ir inlet: Fresh air intake /C switch: - ir conditioning system operates according to the following setting when DEF mode is turned FF. ir outlet: revious setting before turning DEF mode ir flow: revious setting before turning DEF mode FF ir inlet: Fresh air intake /C switch: revious setting before turning DEF mode FF When switch is pressed while air conditioning system is in the FF position. - ir conditioning system turns and operates according to the following setting when DEF mode is turned. ir outlet: DEF ir flow: utomatic control ir inlet: Fresh air intake /C switch: - ir conditioning system operates according to the following setting when DEF mode is turned FF ir outlet: utomatic control ir flow: revious setting before turning DEF mode FF ir inlet: Fresh air intake /C switch: revious setting before turning DEF mode FF TE: When DEF mode is turned while UT is indicated on display, UT indication turns FF. However, air flow automatic control continues. C D E F H HC K L HC-21

22 ERTI < SYSTE DESCRITI > [UTTIC IR CDITII] Intake switch Fan control dial ir inlet changes between recirculation (REC) fresh air intake (FRE) each time this switch is pressed. - switch indicator : Recirculation * - switch indicator : Fresh air intake Switch indicator blinks 2 times and air inlet is set to automatic control when switch is pressed and held for 2 seconds or more. (Switch indicator indicates air inlet status during automatic control.) *: /C switch turns when recirculation (REC) is selected while air conditioning system is in the position. TE: ir inlet can be changed when air conditioning system is in the FF position. ir inlet cannot be changed to recirculation (REC) when air outlet is in the D/F or DEF position. ir inlet automatic control is released when /C switch is in the FF position. ir flow can be manually set within a range of 1st 7th speed using this dial. - Clockwise rotation: ir flow increases - Counterclockwise rotation: ir flow decreases ir conditioning system turns and operates according to the following setting when this dial is turned one click to the left or right while air conditioning system is FF. - ir outlet: utomatic control - ir flow: 1st speed - ir inlet: utomatic control - /C switch: revious setting before turning air conditioning system FF TE: ir flow automatic control is released ( UT turns FF) when this dial is operated while UT is indicated on display. In D-DE: The following switches and dial cannot be operated. - /C switch - FF switch - DE switch - Fan control dial HC-22

23 DISIS SYSTE (/C UT.) < SYSTE DESCRITI > [UTTIC IR CDITII] DISIS SYSTE (/C UT.) Description IFID: ir conditioning system performs self-diagnosis, operation check, function diagnosis, and various settings using diagnosis function of each control unit. ECU Diagnostic item (CSULT) C Self Diagnostic Result /C auto amp. HVC Data onitor ctive Test D Work support Self Diagnostic Result E ulti display unit DU Data onitor C C-IR CDITIER ctive Test Self Diagnostic Result Data onitor F EC EIE Self Diagnostic Result Data onitor ID E/R ID E/R Self Diagnostic Result Data onitor H uto active test CSULT Function IFID: HC CSULT performs the following functions via C communication with /C auto amp. Diagnostic mode Ecu Identification Self Diagnostic Result Data onitor ctive Test Work support TE: Diagnosis should be performed with engine running. Door motor operation speeds become slower and results may be returned even for normal operation if battery voltage drops below 12 V during self-diagnosis. ECU IDETIFICTI art number of /C auto amp. can be checked. SELF-DISIS RESULTS Diagnosis result that is judged by /C auto amp. can be checked. Refer to HC-32, "DTC Index". DT ITR Input/output signal of /C auto amp. can be checked. Display item list onitor item [Unit] TE SE I-VEH TE [ C ( F)] [ C ( F)] Description Displays the part number of /C auto amp. Displays the diagnosis results judged by /C auto amp. Displays the input/output signal of /C auto amp. The signals used to activate each device are forcibly supplied from /C auto amp. Changes the setting for each setting function and performs automatic adjustment of components. Description mbient temperature value converted from ambient sensor signal received from ambient sensor In-vehicle temperature value converted from in-vehicle sensor signal received from invehicle sensor K L HC-23

24 DISIS SYSTE (/C UT.) < SYSTE DESCRITI > [UTTIC IR CDITII] IT TE SE onitor item [Unit] [ C ( F)] Evaporator fin temperature value converted from intake sensor signal received from intake sensor SULD SE [w/m 2 ] Sunload value converted from sunload sensor signal received from sunload sensor SE CL [ C ( F)] mbient temperature value calculated by /C auto amp. I-VEH CL [ C ( F)] In-vehicle temperature value calculated by /C auto amp. IT TE CL [ C ( F)] Evaporator fin temperature value calculated by /C auto amp. SUL SE CL [w/m 2 ] Sunload value calculated by /C auto amp. Description C REQ SI [n/ff] Displays /C signal /FF status transmitted to C. F REQ SI [n/ff] Displays blower fan signal /FF status transmitted to C. F DUTY * Target value of voltage (applied voltage) applied to blower motor by /C auto amp. X Target discharge air temperature judged by /C auto amp. depending on the temperature setting and the value from each sensor E CL TE [ C ( F)] Engine coolant temperature signal value received from EC via C communication *: DUTY is displayed, but voltage is indicated. r unit is not displayed but unit is (V). CTIVE TEST The signals used to activate each device forcibly supplied from /C auto amp. operation check of air conditioning system can be performed. HVC TEST Test item Check each output device Description The operation check of air conditioning system can be performed by selecting the mode. Refer to the following table for the conditions of each mode. Test item DE 1 DE 2 DE 3 DE 4 DE 5 DE 6 DE 7 ode door motor position VET VET /L /L FT * D/F DEF Intake door motor position REC REC REC 20% FRE 80% FRE FRE FRE ir mix door motor position FULL CLD FULL CLD FULL CLD IDDLE IDDLE FULL HT FULL HT lower motor (pplied voltage) 5 V 8.5 V 10.5 V 8.5 V 8.5 V 8.5 V 13 V agnet clutch FF FF lower motor (lower fan signal transmitted to C) FF FF *: osition of mode door motor is set to the status of automatic control that is selected by foot position setting trimmer. Refer to HC-43, "Foot osition Setting Trimmer". TE: erform the inspection of each output device after starting the engine because the compressor is operated. WRK SURT Setting change of each setting functions and automatic adjustment of components can be performed. TE SET CRRECT REC ERY SET FRE ERY SET Work item Description Refer to Setting change of temperature setting trimmer can be performed. Setting change of inlet port memory function (REC) can be performed. Setting change of inlet port memory function (FRE) can be performed. HC-42, "Temperature Setting Trimmer" HC-42, "Inlet ort emory Function (REC)" HC-43, "Inlet ort emory Function (FRE)" HC-24

25 DISIS SYSTE (/C UT.) < SYSTE DESCRITI > [UTTIC IR CDITII] LWER SET Work item Description Refer to Door otor Starting osition Reset Setting change of foot position setting trimmer can be performed. Starting position reset of air mix door motor and mode door motor can be performed. HC-43, "Foot osition Setting Trimmer" HC-44, "Work rocedure" TE: When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V or less, the setting of WRK SURT may be cancelled. C D E F H HC K L HC-25

26 DISIS SYSTE (C) < SYSTE DESCRITI > [UTTIC IR CDITII] DISIS SYSTE (C) C ITE C ITE : CSULT Function (C - C ITE) IFID: LICTI ITE CSULT performs the following functions via C communication with C. Diagnosis mode Work Support Self Diagnostic Result C Diag Support onitor Data onitor ctive Test Ecu Identification Configuration Function Description Changes the setting for each system function. Displays the diagnosis results judged by C. onitors the reception status of C communication viewed from C. The C input/output signals are displayed. The signals used to activate each device are forcibly supplied from C. The C part number is displayed. Read and save the vehicle specification. Write the vehicle specification when replacing C. SYSTE LICTI C can perform the following functions for each system. TE: It can perform the diagnosis modes except the following for all sub system selection items. : pplicable item System Sub system selection item TE: *: For models with automatic /C, this diagnosis mode is not used. Diagnosis mode Work Support Data onitor ctive Test Door lock DR LCK Rear window defogger RER DEFER Warning chime UZZER Interior room lamp timer IT L Exterior lamp HED L Wiper and washer WIER Turn signal and hazard warning lamps FLSHER ir conditioning system IR CDITER * Intelligent Key system Engine start system ITELLIET KEY Combination switch C SW ody control system C VIS - TS IU Interior room lamp battery saver TTERY SVER ack door open TRUK Theft warning alarm THEFT L R RETIED WR Signal buffer system SIL UFFER TS IR RESSURE ITR FREEZE FRE DT (FFD) The C records the following vehicle condition at the time a particular DTC is detected, and displays on CSULT. HC-26

27 DISIS SYSTE (C) < SYSTE DESCRITI > [UTTIC IR CDITII] CSULT screen item Indication/Unit Description Vehicle Speed km/h Vehicle speed of the moment a particular DTC is detected do/trip eter km Total mileage (dometer value) of the moment a particular DTC is detected Vehicle Condition SLEE>LCK SLEE>FF LCK>CC CC> RU>CC I Counter 0-39 CRK>RU RU>URET CC>FF FF>LCK FF>CC >CRK FF>SLEE LCK>SLEE LCK FF CC EIE RU CRKI ower position status of the moment a particular DTC is detected While turning C status from low power consumption mode to normal mode (ower position is LCK *.) While turning C status from low power consumption mode to normal mode (ower position is FF.) While turning power position from LCK * *to CC While turning power position from CC to I While turning power position from RU to CC (Vehicle is stopping and selector lever is except position.) While turning power position from CRKI to RU (From cranking up the engine to run it) While turning power position from RU to CC (Emergency stop operation) While turning power position from CC to FF While turning power position from FF to LCK * While turning power position from FF to CC While turning power position from I to CRKI While turning C status from normal mode (ower position is FF.) to low power consumption mode While turning C status from normal mode (ower position is LCK *.) to low power consumption mode ower position is LCK * ower position is FF (Ignition switch FF) ower position is CC (Ignition switch CC) ower position is I (Ignition switch with engine stopped) ower position is RU (Ignition switch with engine running) ower position is CRKI (t engine cranking) The number of times that ignition switch is turned after DTC is detected The number is 0 when a malfunction is detected now. The number increases like after returning to the normal condition whenever ignition switch FF. The number is fixed to 39 until the self-diagnosis results are erased if it is over 39. TE: *: ower position shifts to LCK from FF, when ignition switch is in the FF position, selector lever is in the position (/T models and CVT models), and any of the following conditions are met. Closing door pening door Door is locked using door request switch Door is locked using Intelligent Key The power position shifts to CC when the push-button ignition switch (push switch) is pushed at LCK. IR CDITIER IR CDITIER : CSULT Function (C - IR CDITIER) (utomatic / C) IFID: C D E F H HC K L DT ITR Display Item List HC-27

28 DISIS SYSTE (C) < SYSTE DESCRITI > [UTTIC IR CDITII] onitor Item [Unit] Contents F SI [n/ff] Displays the blower fan status as jugged from the /C auto amp. IR CD SW [n/ff] Displays [C (n)/c (ff)] status as judged from the /C auto amp. HC-28

29 /C UT. < ECU DISIS IFRTI > [UTTIC IR CDITII] ECU DISIS IFRTI /C UT. Reference Value CSULT DT ITR REFERECE VLUES *: DUTY is displayed, but voltage is indicated. r unit is not displayed but unit is (V). TERIL LYUT onitor item Condition Value/Status TE SE I-VEH TE IT TE SE SULD SE SE CL I-VEH CL IT TE CL SUL SE CL C REQ SI F REQ SI F DUTY * X E CL TE Ignition switch Ignition switch Ignition switch Ignition switch Ignition switch Ignition switch Ignition switch Ignition switch Engine: Run at idle after warming up Engine: Run at idle after warming up Engine: Run at idle after warming up Ignition switch Ignition switch /C switch: (Compressor operation status) /C switch: FF lower motor: lower motor: FF IFID: Equivalent to ambient temperature Equivalent to in-vehicle temperature Equivalent to evaporator fin temperature Equivalent to sunload amount Equivalent to ambient temperature Equivalent to in-vehicle temperature Equivalent to evaporator fin temperature Equivalent to sunload amount n ff n ff lower motor: 4 13 lower motor: FF 0 Value according to target air flow temperature Equivalent to engine coolant temperature C D E F H HC K L HYSICL VLUES II0690ZZ HC-29

30 /C UT. < ECU DISIS IFRTI > [UTTIC IR CDITII] Terminal o. (Wire color) Description + Signal name 2 (L) 3 (V) 4 (R) 5 () 6 (L) 7 () 8 (W) 9 () 10 (R) 11 (S) 12 (Y) 30 () 30 () 30 () 30 () C-H C-L 30 () 30 () 30 () 30 () 30 () Input/ utput Condition In-vehicle sensor signal Input Ignition switch Intake sensor signal Input Ignition switch mbient sensor signal Input Ignition switch Sunload sensor signal Input Ignition switch Intake door motor R power supply /C auto amp. connection recognition signal Input/ utput Input/ utput Value V utput voltage varies with in-vehicle temperature V utput voltage varies with evaporator fin temperature V utput voltage varies with ambient temperature V utput voltage varies with sunload amount utput Ignition switch V utput Ignition switch V Sensor ground Ignition switch V Ignition power supply Input Ignition switch V attery power supply Input Ignition switch FF V 13 (R) 30 () ower transistor control signal utput Ignition switch lower motor: 1st speed (manual) ZI0863 Ignition switch lower motor: FF 14 (L) 30 () lower fan signal utput II0941 Ignition switch lower motor: KI4960 HC-30

31 /C UT. < ECU DISIS IFRTI > [UTTIC IR CDITII] Terminal o. (Wire color) Description + Signal name Input/ utput Condition Value Ignition switch /C switch: FF (/C indicator: FF) C 15 (Y) 30 () /C signal utput I0012 D Ignition switch /C switch: (/C indicator: ) E F 17 (R) 18 (R) 19 (W) 20 (L) 21 () 22 (S) 30 () 35 () 36 (V) 37 (R) 38 () 39 (Y) 40 (V) 30 () 30 () 30 () 30 () 30 () 30 () /IX drive 4 /IX drive 3 /IX drive 2 /IX drive 1 ir mix door motor drive signal utput Ignition switch Right after the temperature control dial operation Ignition power supply Input Ignition switch V Intake door motor R feedback signal Input Ignition switch Intake switch: REC Ignition switch Intake switch: FRE V V round round Ignition switch V 30 () 30 () 30 () 30 () 30 () 30 () REC FRE DE drive 4 DE drive 3 DE drive 2 DE drive 1 Intake door motor drive signal ode door motor drive signal utput utput Ignition switch Intake switch: FRE REC Ignition switch Intake switch: REC FRE Ignition switch Intake switch: REC FRE Ignition switch Intake switch: FRE REC Ignition switch Right after the DE switch operation V 0 1 V V 0 1 V II0941 II1647 II1647 H HC K L HC-31

32 /C UT. < ECU DISIS IFRTI > [UTTIC IR CDITII] Fail-safe IFID: FIL-SFE FUCTI If a communication error exists between the /C auto amp. and multi display unit for 2 seconds or longer, air conditioning is controlled under the following conditions: /C display Set temperature ir outlet ir flow ir inlet /C switch : FF : Setting before communication error occurs : utomatic control : utomatic control : Fresh air intake (FRE) : DTC Index IFID: DTC Items (CSULT screen terms) Reference U1000 C C CIRCUIT HC-45, "DTC Logic" U1010 CTRL UIT (C) HC-46, "DTC Logic" 2578 I-VEHICLE SESR HC-47, "DTC Logic" 2579 I-VEHICLE SESR HC-47, "DTC Logic" 257 IET SER HC-50, "DTC Logic" 257C IET SER HC-50, "DTC Logic" 2581 ITKE SESR HC-53, "DTC Logic" 2582 ITKE SESR HC-53, "DTC Logic" 2630 * SULD SESR HC-56, "DTC Logic" 2631 * SULD SESR HC-56, "DTC Logic" 270 ITKE DR TR HC-59, "DTC Logic" 271 ITKE DR TR HC-59, "DTC Logic" 272 DR IR IX DR T HC-63, "DTC Logic" 273 DR IR IX DR T HC-63, "DTC Logic" 274 DR IR IX DR T HC-63, "DTC Logic" 275 DR IR IX DR T HC-63, "DTC Logic" 276 DE DR TR HC-65, "DTC Logic" 277 DE DR TR HC-65, "DTC Logic" 278 DE DR TR HC-65, "DTC Logic" 279 DE DR TR HC-65, "DTC Logic" *: erform self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise self-diagnosis indicates even though the sunload sensor is functioning normally. HC-32