VTITI, TR & IR ITIR STI TR & IR ITII TR SYST TTS UTTI IR ITIR RUTI... 5 RUTIS... 5 ormal harge recaution...5 oint to e hecked efore Starting aintenance Work...5 recaution for Removing 12V attery...5 recaution for Supplemental Restraint System (SRS) "IR " and "ST T R-T- SIR"...5 recaution for rocedure without owl Top over...6 SYST SRITI... 7 SRITI... 7 escription...7 T RTS... 8 UTTI IR ITII SYST...8 UTTI IR ITII SYST : omponent arts ocation...8 UTTI IR ITII SYST : omponent escription...9 / UIT SSY...9 / UIT SSY : spirator...9 / UIT SSY : Intake Sensor...9 / UIT SSY : ir ix oor ctuator...9 / UIT SSY : ode oor ctuator...10 / UIT SSY : Intake oor ctuator...10 / UIT SSY : lower an otor...11 / UIT SSY : ower Transistor...12 / uto mp....12 mbient Sensor...12 In-Vehicle Sensor...12 Sunload Sensor...13 Refrigerant ressure Sensor...13 eater luid Temperature Sensor...13 / relay...13 SYST...14 UTTI IR ITII SYST...14 UTTI IR ITII SYST : System iagram...14 UTTI IR ITII SYST : System escription...14 UTTI IR ITII SYST : Temperature ontrol...16 UTTI IR ITII SYST : ir utlet ontrol...16 UTTI IR ITII SYST : ir low ontrol...17 UTTI IR ITII SYST : ir Inlet ontrol...18 UTTI IR ITII SYST : lectric ower istribution ontrol...19 UTTI IR ITII SYST : ompressor ontrol...20 UTTI IR ITII SYST : T lement eater ontrol...21 UTTI IR ITII SYST : eater ump ontrol...22 UTTI IR ITII SYST : ode ontrol...22 UTTI IR ITII SYST : Timer / ontrol...23 UTTI IR ITII SYST : Remote / ontrol...24 UTTI IR ITII SYST : ircuit iagram...25 UTTI IR ITII SYST : ctuator Zero osition Reset...26 RTI...27 escription...27 Switch ame and unction...27 ISIS SYST (V)...30 escription...30 SUT unction...30-1
U ISIS IRTI... 34 / UT.... 34 Input/utput Standard... 34 T Index... 40 WIRI IR... 42 UTTI IR ITIR SYST... 42 Wiring iagram... 42 SI ISTI... 51 ISIS RIR WR W... 51 Work low... 51 RTI ISTI... 53 Work rocedure... 53 SYST STTI... 55 Temperature Setting Trimmer... 55 Inlet ort emory unction (R)... 55 Inlet ort emory unction (R)... 56 oot osition Setting Trimmer... 56 Setting of compressor maximum rotation speed during pre air conditioning... 56 Setting of compressor maximum rotation speed during idling... 57 R TR STRTI SITI R- ST... 58 escription... 58 Work rocedure... 58 T/IRUIT ISIS... 59 U1000 IRUIT... 59 escription... 59 T ogic... 59 iagnosis rocedure... 59 U1010 TR UIT ()... 60 escription... 60 T ogic... 60 iagnosis rocedure... 60 2578, 2579 I-VI SSR... 61 T ogic... 61 iagnosis rocedure... 61 omponent Inspection... 63 T ogic... 70 iagnosis rocedure... 70 2770, 2773, 2774, 2775, 2776 T TS TR... 72 T ogic... 72 iagnosis rocedure... 72 2771 T TS TR... 75 T ogic... 75 iagnosis rocedure... 75 2772 T TS TR... 76 T ogic... 76 iagnosis rocedure... 76 2777, 2779, 277 T TS TR... 79 T ogic... 79 iagnosis rocedure... 79 277 T TS TR... 81 T ogic... 81 iagnosis rocedure... 81 277, 277 TR UI TR- TUR SSR... 83 T ogic... 83 iagnosis rocedure... 83 omponent Inspection... 84 2780 TRI RSSR... 86 T ogic... 86 iagnosis rocedure... 86 2781 TRI RSSR... 87 T ogic... 87 iagnosis rocedure... 87 2782 TRI RSSR... 88 T ogic... 88 iagnosis rocedure... 88 2783, 2784 TRI RSSR... 89 T ogic... 89 iagnosis rocedure... 89 2785, 2786 TRI RSSR... 90 T ogic... 90 iagnosis rocedure... 90 257, 257 IT SSR... 64 T ogic... 64 iagnosis rocedure... 64 omponent Inspection... 66 2581, 2582 IT SSR... 67 T ogic... 67 iagnosis rocedure... 67 omponent Inspection... 69 2630, 2631 SU SSR... 70-2 2787 TRI RSSR... 91 T ogic... 91 iagnosis rocedure... 91 2788 TRI RSSR... 92 T ogic... 92 iagnosis rocedure... 92 2789 TRI RSSR... 93 T ogic... 93 iagnosis rocedure... 93
278, 278 TRI RSSR...94 T ogic...94 iagnosis rocedure...94 278, 278 TRI RSSR...97 T ogic...97 iagnosis rocedure...97 278, 2790 TR U... 100 T ogic... 100 iagnosis rocedure... 100 2791 TRI RSSR... 103 T ogic... 103 iagnosis rocedure... 103 2792 TR U... 105 T ogic... 105 iagnosis rocedure... 105 2793 TR U... 106 T ogic... 106 iagnosis rocedure... 106 2794 TR U... 107 T ogic... 107 iagnosis rocedure... 107 270, 271 IT R TR... 108 T ogic... 108 iagnosis rocedure... 108 omponent Inspection (R)... 110 omponent Inspection (otor)... 110 272, 273, 274, 275 IR IX R TR... 112 T ogic... 112 iagnosis rocedure... 112 omponent Inspection... 113 276, 277, 278, 279 R TR... 114 T ogic... 114 iagnosis rocedure... 114 omponent Inspection... 115 WR SUY RU IRUIT... 116 / UT.... 116 / UT. : iagnosis rocedure... 116 WR TR... 118 omponent unction heck... 118 iagnosis rocedure... 118 omponent Inspection (lower otor)... 120 omponent Inspection (lower Relay)... 121 TR U... 122 omponent unction heck... 122 iagnosis rocedure... 122 TRI RSSR ISUTI RSIST... 125 omponent Inspection...125 T TS TR ISUTI R- SIST... 127 omponent Inspection...127 SYT ISIS... 129 UTTI IR ITIR SYST.. 129 Symptom Table...129 ISUIIT I... 130 escription...130 iagnosis rocedure...130 ISUIIT TI... 131 escription...131 iagnosis rocedure...131 RSSR S T RT... 133 escription...133 iagnosis rocedure...133 RV ISTTI... 134 / TR (/ UT.)... 134 Removal and Installation...134 IT SSR... 135 Removal and Installation...135 I-VI SSR... 136 Removal and Installation...136 SU SSR... 137 Removal and Installation...137 IT SSR... 138 xploded View...138 Removal and Installation...138 RRIRT RSSUR SSR... 139 xploded View...139 Removal and Installation...139 WR TRSISTR... 140 xploded View...140 Removal and Installation...140 R TR... 141 xploded View...141 IT R TR...142 IT R TR : Removal and Installation...142 R TR...143 R TR : Removal and Installation..143 IR IX R TR...143-3
IR IX R TR : Removal and Installation...143 TR UI TRTUR SSR..145 Removal and Installation... 145-4
RUTIS < RUTI > [UTTI IR ITIR] RUTI RUTIS ormal harge recaution II:0000000007080630 WRI: If a technician uses a medical electric device such as an implantable cardiac pacemaker or an implantable cardioverter defibrillator, the possible effects on the devices must be checked with the device manufacturer before starting the charge operation. s radiated electromagnetic wave generated by on board charger at normal charge operation may effect medical electric devices, a technician using a medical electric device such as implantable cardiac pacemaker or an implantable cardioverter defibrillator must not enter the vehicle compartment (including luggage room) during normal charge operation. oint to e hecked efore Starting aintenance Work II:0000000007080632 The high voltage system may starts automatically. It is required to check that the timer air conditioner and timer charge (during VS connection) are not set before starting maintenance work. T: If the timer air conditioner or timer charge (during VS connection) is set, the high voltage system starts automatically even when the power switch is in state. recaution for Removing 12V attery II:0000000007080633 When removing the 12V battery, turn / the power switch and check that the charging status indicator does not blink. The 12V battery must be removed within one hour after checking the indicator lamp. T: The automatic 12V battery charge control may start even when the power switch is in state. The automatic 12V battery charge control does not start within approximately one hour when the power switch is turned /. recaution for Supplemental Restraint System (SRS) "IR " and "ST T R-TSIR" II:0000000007080634 The Supplemental Restraint System such as IR and ST T R-TSIR, 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 ST T 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/IIITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. or removal of Spiral able 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. RUTIS W USI WR TS (IR R TRI) RS WRI: lways observe the following items for preventing accidental activation. When working near the ir ag iagnosis Sensor Unit or other ir ag System sensors with the power switch, never use air or electric power tools or strike near the sensor(s) with a hammer. eavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. -5
RUTIS < RUTI > [UTTI IR ITIR] When using air or electric power tools or hammers, always switch the power switch, disconnect the 12V battery, and wait at least 3 minutes before performing any service. recaution for rocedure without owl Top over When performing the procedure after removing cowl top cover, cover the lower end of windshield with urethane, etc to prevent damage to windshield. II:0000000007080635 II3706-6
SRITI < SYST SRITI > [UTTI IR ITIR] SYST SRITI SRITI escription II:0000000006997076 This vehicle includes an ozone-safe full automatic air conditioning system. In order to facilitate diagnosis, the system uses an / auto amp. which is compatible with SUT. -7
T RTS < SYST SRITI > [UTTI IR ITIR] T RTS UTTI IR ITII SYST UTTI IR ITII SYST : omponent arts ocation II:0000000006997077 T RTS TI II1849ZZ. Top right of instrument panel. Right side of motor room. eft side of / unit : Rear of / unit. Right side of / unit. vaporator T SRITI o. art name Refer to 1. mbient sensor -12 2. Refrigerant pressure sensor -13 3. In-vehicle sensor -12 4. / auto amp. -12-8
T RTS < SYST SRITI > [UTTI IR ITIR] o. art name Refer to 5. V V-16 6. Sunload sensor -13 7. / relay -13 8. Intake door actuator -10 9. ir mix door actuator -9 10. ower transistor -12 11. spirator -9 12. lower fan motor -11 13. ode door actuator -10 14. Intake sensor -9 etail for other compornent parts information is following. Refrigertion system : -16, "RRIRTI SYST : omponent arts ocation" eating system : -17, "TI SYST : omponent arts ocation" UTTI IR ITII SYST : omponent escription / UIT SSY / UIT SSY : spirator The aspirator generates vacuum by the air blown from the / unit and draws the air of the passenger room into the in-vehicle sensor via the aspirator duct. II:0000000006997078 II:0000000006997079 / UIT SSY : Intake Sensor Intake sensor measures evaporator fin temperature. This sensor uses thermistor that decreases electrical resistance as temperature increases. RI1804 II:0000000006997080 / UIT SSY : ir ix oor ctuator SII1630 II:0000000006997081 SRITI step motor actuator is used for the air mix door actuator. When the drive signal from the / auto amp. is input into the actuator, the step motor inside the actuator rotates by the number of steps corresponding to the drive signal and stops at the target door position. The rotational movement of the motor is transmitted via the rod and lever to the air mix doors (upper air mix door, lower air mix door), changing the discharge air temperature. IR IX R TUTR RIV T -9
T RTS < SYST SRITI > [UTTI IR ITIR] The 4 drive coils are excited in sequence in order to drive the motor. irection of rotation is changeable by recomposing pattern of excitation. SII1655 / UIT SSY : ode oor ctuator II:0000000006997082 SRITI step motor actuator is used for the mode door actuator. When the drive signal from the / auto amp. is input into the actuator, the step motor inside the actuator rotates by the number of steps corresponding to the drive signal and stops at the target door position. The rotational movement of the motor is transmitted via the rod, link, and lever to the mode doors (center ventilator, defrost door, sub-defrost door, side ventilator door, and foot door), changing the air outlets. R TUTR RIV T The 4 drive coils are excited in sequence in order to drive the motor. irection of rotation is changeable by recomposing pattern of excitation. ZII0033 / UIT SSY : Intake oor ctuator II:0000000006997083 Intake door actuator consists of motor that drives door and R (otentiometer alance Resister) that detects door position. otor operates according to drive signal from / auto amp.. otor rotational movement is transmitted via the lever to the intake door, changing the air inlet. -10
T RTS < SYST SRITI > [UTTI IR ITIR] The / auto amp. monitors the door position based on the R signal that changes in coordination with the rotation of the motor. / UIT SSY : lower an otor rush motor, that rotates coil while brush functions as contact points, is adopted for blower motor. Rotation speed changes according to voltage from power transistor. SII1633 II:0000000006997084 II1575ZZ II0793-11
T RTS < SYST SRITI > [UTTI IR ITIR] / UIT SSY : ower Transistor II:0000000006997085 ower transistor, that uses S field effect transistor, is adopted for blower fan motor speed control. T: S field effect transistor is a transistor in which the gate is composed of a metal-oxide-semiconductor (S). ield effect transistor is controlled by voltage, while ordinary transistor is controlled by current. lectrode 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 fan motor (approximately 0 to 16 V), according to gate voltage from / auto II1634ZZ amp.. This power transistor does not require I relay even when the maximum voltage is applied to blower fan motor at I status, because voltage drop is nominal. / uto mp. II:0000000006997086 / auto amp. controls / by calculations based on signals input from each sensor and switch. / auto amp. has self-diagnosis function. iagnosis of automatic air conditioning system can be performed quickly. mbient Sensor mbient sensor measures ambient air temperature. This sensor uses thermistor that decreases electrical resistance as temperature increases. II:0000000006997087 In-Vehicle Sensor II1861 II:0000000006997088 In-vehicle sensor measures temperature of interior air that is sucked into the aspirator. This sensor uses thermistor that decreases electrical resistance as temperature increases. II1862-12
T RTS < SYST SRITI > [UTTI IR ITIR] Sunload Sensor Sunload sensor measures sunload amount. This sensor converts the sunload to a voltage signal by photodiode and transmits the signal to the / auto amp.. II:0000000006997089 Refrigerant ressure Sensor II1863 II:0000000006997090 SRITI The refrigerant pressure sensor converts high-pressure side refrigerant pressure into voltage and outputs it to. performs the cooler system protection and each engine control by the input voltage. STRUTUR RTI The refrigerant pressure sensor is a capacitance type sensor. It consists of a pressure detection area and a signal processing area. The pressure detection area is the variable capacity compressor. It changes the internal capacitance according to the pressure. The signal processing area detects the capacitance of pressure detection area, converts it into the voltage, and outputs it to. eater luid Temperature Sensor II:0000000006997091 eater fluid temperaturethe sensor measures the heater fluid temperature. This sensor uses thermistor that decreases electrical resistance as temperature increases. I2657 / relay SII1656 II:0000000006997092 / relay, that operates timer air conditioning and remote control air conditioning while power switch is in the position, is adopted. Refer to -8, "UTTI IR ITII SYST : omponent arts ocation". -13
SYST < SYST SRITI > [UTTI IR ITIR] SYST UTTI IR ITII SYST UTTI IR ITII SYST : System iagram II:0000000006997093 SII1704 UTTI IR ITII SYST : System escription II:0000000006997094 SRITI The automatic air conditioning system is controlled by the control functions of the / auto amp., V, and V control unit. The / system operations are input from the / auto amp. switches. The / auto amp. sends various display information to V via V- communication. V sends information received from the / auto amp. to the V control unit via V- communication. V control unit displays the / status on the display, based on the information received from V. TR Y / UT. -16, "UTTI IR ITII SYST : Temperature ontrol" -16, "UTTI IR ITII SYST : ir utlet ontrol" -17, "UTTI IR ITII SYST : ir low ontrol" -14
SYST < SYST SRITI > [UTTI IR ITIR] -18, "UTTI IR ITII SYST : ir Inlet ontrol" -20, "UTTI IR ITII SYST : ompressor ontrol" -21, "UTTI IR ITII SYST : T lement eater ontrol" -22, "UTTI IR ITII SYST : eater ump ontrol" Input data processing - mbient temperature correction The / auto amp. inputs the temperature detected with the ambient sensor as the ambient temperature. The / auto amp. internally processes the ambient temperature data is two data types: data for / control and data for ambient temperature display. When the vehicle speed is 30 km/h or less, if the effects of radiator heat and other factors result in a sudden increase in detected ambient temperature, the / auto amp. performs delay correction so that the recognized temperature rises slowly. orrection is performed so that the change is recognized quickly when the ambient temperature drops. When the temperature detected by the ambient sensor is less than approximately 20 ( 4 ), no correction is performed of the data for / control. When the temperature detected by the ambient sensor is less than approximately 29 ( 20 ), no correction is performed of the data for ambient temperature display. - Interior air temperature correction The / auto amp. inputs the temperature detected by the in-vehicle sensor as the interior air temperature. In order to prevent effects from uneven temperatures inside the vehicle and from external disruptions, the / auto amp. performs correction so that the recognized interior air temperature changes only slowly. The / auto amp. performs the correction so that the recognized interior temperature changes according to the difference between the detected interior temperature and the recognized interior temperature. If the difference is large, the changes occur quickly, and becomes slower as the difference becomes smaller. - Intake temperature correction The / auto amp. inputs the temperature detected with the intake sensor as the air temperature after passing through the evaporator. In order to prevent effects from uneven intake temperatures and from external disruptions, the / auto amp. performs correction so that the recognized intake air temperature changes only slowly. The / auto amp. performs the correction so that the recognized intake temperature changes according to the difference between the detected intake temperature and the recognized intake temperature. If the difference is large, the changes occur quickly, and becomes slower as the difference becomes smaller. - Sunload amount correction The / auto amp. inputs the sunload detected by the sunload sensor. When the sunload suddenly changes, for example when entering and leaving a tunnel, correction is performed so that the recognized sunload of the / auto amp. changes slowly. - Set temperature correction The / auto amp. controls the interior temperature so that it is always at the optimum level, and performs correction so that the temperature experienced by the passengers matches the target temperature set with the temperature control dial, according to the ambient temperature detected by the ambient sensor. TR Y V or details of cooling fan control, refer to V-39, "I VT SYST I TR : System escription". -15
SYST < SYST SRITI > [UTTI IR ITIR] UTTI IR ITII SYST : Temperature ontrol II:0000000006997095 When power switch is in the position, / auto amp. always automatically controls temperature regardless of air conditioner operational state. / auto amp. calculates the target air mix door opening angle according to set temperature, in-vehicle temperature, ambient temperature, and sunload. ir mix door is controlled according to 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 18.0 (60 61 ), and at the fully hot position when set temperature is 32.0 (89 90 ). UTTI IR ITII SYST : ir utlet ontrol SII1644 II0633 II:0000000006997096 SII1645-16
SYST < SYST SRITI > [UTTI IR ITIR] While air outlet is in automatic control, / auto amp. selects the mode door position depending on a target air mix door angle and outlet air temperature calculated from sunload. When T is selected for the air outlet, the outlet is set to / to prevent windshield fogging only when the ambient temperature is extremely low [-13 (8.6 ) or less]. If the switch is pressed, the outlet is fixed at T. UTTI IR ITII SYST : ir low ontrol II0710 II:0000000006997097 SRITI In addition to manual air flow control and automatic air flow control, air flow control also includes starting air flow control, starting air flow control when coolant temperature is low, starting air flow control when interior temperature is high, and air flow control when actuator is operating. SII1646 UTTI IR W TR / auto amp. decides target air flow according to target air mix door opening angle. / auto amp. changes voltage to power transistor gate and controls air flow in a continuous range (no steps) so that target air flow is achieved. t this time, the voltage applied to the blower fan motor is changed at the rate of 1.0 Volt per second in order to prevent any sudden changes in air flow. When air outlet is VT or /, the minimum air flow is changed depending on sunload. STRTI IR W TR II1129-17
SYST < SYST SRITI > [UTTI IR ITIR] When blower fan motor is activated, / auto amp. changes the voltage to the power transistor gate, and gradually increases the voltage to the blower fan motor, in order to prevent a sudden increase in discharge air flow (approximately 10.5 seconds for air flow to reach I from W). T: When outlet is, air flow control at actuator start is not performed. STRTI IR W TR T W TR UI TRTUR When blower fan motor starts, the / auto amp. suspends blower motor activation for a maximum of 150 seconds, according to the target air mix door position, to prevent cold air from being discharged. fter this, voltage applied to power transistor gate is increased gradually, and the blower fan motor starts. II1130 SII1717 STRTI IR W TR T I ITRIR IR TRTUR When evaporator temperature is high [intake air temperature sensor value is 35 (95 ) or more], to prevent a hot discharged air flow, / auto amp. suspends blower motor activation for approximately 3 seconds so that evaporator is cooled by refrigerant. IR W TR T TUTR RTI If the mode actuator starts when the air flow corresponds to a voltage of 8.6 V or more applied to the blower fan motor, the / auto amp. performs control that fixes the voltage applied to the blower fan motor at 8.5 V, temporarily decreasing the air flow and ensuring that the mode door operates smoothly. U IR W TR When the fan switch is operated, automatic control is canceled and the desired fan speed (1 7) can be selected. Voltage applied to blower fan motor (V) ode switch VT, / T, / 1st 4.0 4.0 4.0 2nd 5.4 5.1 5.1 an speed (When manual control is selected) 3rd 6.8 6.2 6.3 4th 8.3 7.3 7.4 5th 9.7 8.3 8.5 6th 11.1 9.4 9.7 7th 12.5 10.5 11.2 UTTI IR ITII SYST : ir Inlet ontrol II:0000000006997098 anual control by the R switch and R switch is given priority for inlet selection. When the switch is pressed, the inlet is fixed at fresh air intake. uring automatic inlet control, when the electric compressor is and the ambient temperature is high, the intake is fixed at recirculation. -18
SYST < SYST SRITI > [UTTI IR ITIR] uring automatic inlet control when the ambient temperature is other than above, the / auto amp. changes the intake control status according to the ambient temperature and the operating status of the electric compressor, discharge air flow, and outlet operating status. ompressor ode switch mbient temperature (temperature detected by ambient sensor) 14 (57.2 ) or less 15 (59 ) or more VT / T 30% recirculation ontrol according to the target air mix door position / resh air intake VT / T / 30% recirculation resh air intake resh air intake UTTI IR ITII SYST : lectric ower istribution ontrol II0711 II:0000000006997099 SRITI ased on the vehicle status, battery remaining energy, and other factors, V calculates the electrical power needed to operate the / system, and sends this value to the / auto amp. via V communication. ased on the ambient sensor signal, inlet position, outlet position, target air mix door position, and other information, the / auto amp. calculates the electrical power used by the electric compressor and T element heater. If the total exceeds the electric power consumption permitted by the V, then the operating rate of the electric compressor and T element heater are reduced to lower the power consumption. SII1669 WR-U -W TR or the first 10 minutes after the power switch is turned, heating/cooling operation at maximum capacity is possible based on a judgment by the / auto amp.. (owever this does not occur in mode.) -19
SYST < SYST SRITI > [UTTI IR ITIR] UTTI IR ITII SYST : ompressor ontrol II:0000000006997100 SRITI If the conditions for electric compressor operation are met while the blower fan motor is operating, then based on the various input signals, the / auto amp. calculates the compressor target speed that will produce the target temperature [4 12 (39.2 53.6 )] for the evaporator outlet temperature, and sends a speed command to the electric compressor via a communications signal. The electric compressor receives the / auto amp. command and controls the motor speed by means of its built-in inverter circuit, then transmits this status by communications. vaporator ryoprotective rotection ontrol When intake air temperature sensor detects that air temperature after passing through evaporator is 1 (33.8 ) or less, / auto amp. sends a request to the electric compressor for a speed of 0 rpm, stopping compressor operation. When the air temperature after passing through evaporator reaches 4 (39.2 ) or more, operation of the electric compressor is resumed. SII1649 SII1650 ompressor rotection ontrol at ressure alfunction When the refrigerant pressure on the high-pressure side (detected by the refrigerant pressure sensor) that is received from the V via V system communication is as shown below, the / auto amp. stops the compressor. - pproximately 2.65 a (pproximately 27.0 kg/cm 2 ) or more - pproximately 0.14 a (pproximately 1.4 kg/cm 2 ) or less When the refrigerant pressure on the high-pressure side returns to the range below, the / auto amp. resumes operation of the electric compressor. - pproximately 1.55 a (pproximately 15.8 kg/cm 2 ) or less - pproximately 0.16 a (pproximately 1.6 kg/cm 2 ) or more ail-safe ontrol When the / auto amp. detects the conditions shown below, it stops operation of the electric compressor. -20
SYST < SYST SRITI > [UTTI IR ITIR] alfunction judgment item escription Recovery condition URT communication malfunction (lectric compressor / auto amp.) Intake sensor malfunction mbient sensor malfunction When the electric compressor detects the conditions shown below, compressor operation is restricted. alfunction judgment item ompressor discharge temperature overheat ompressor I overheat ompressor voltage saturation ompressor overcurrent / auto amp. judges that there is a URT communications malfunction. pen circuit or short circuit is detected in the intake sensor circuit. pen circuit or short circuit is detected in the ambient sensor circuit. escription ompressor discharge refrigerant temperature (estimated value) is more than 130 (266 ). I temperature is more than 125 (257 ) within 1 minute after start. I temperature is more than 88 (190.4 ) at least 1 minute after start. Inverter output voltage is 140% or more. Start failed 3 times because current of 35.1 or more flowed within 90 seconds after start. urrent of 35.1 or more flows when compressor is stopped. ompressor overload input is more than 13.5. ompressor low-voltage malfunction ompressor high-voltage malfunction ompressor I temperature sensor malfunction ompressor shunt signal offset malfunction ompressor R, R, malfunction ompressor discharge temperature restriction ompressor I temperature restriction ompressor low-speed overload URT communication malfunction (lectric compressor / auto amp.) igh voltage is below 230 V. igh voltage is more than 420 V. It is judged that an I temperature sensor open circuit or short circuit is occurred. It is judged that an unexpected shunt signal value is occurred. data malfunction is detected in the R area or R area. It is judged that an unexpected value is occurred. stimated discharge temperature exceeded 110 (230 ). I temperature exceeded 83 (181.4 ). ompressor is not operating at command speed. lectric compressor judges that a URT communication malfunction is occurred. URT communications occur normally for 2 seconds or more. Voltage value of intake sensor circuit returns to normal. Voltage value of ambient sensor circuit returns to normal. ompressor operation Stopped Stopped ompressor speed is limited. Stopped ompressor speed is limited. Stopped Stopped Stopped Stopped Stopped ompressor speed is limited. ompressor speed is limited. ompressor speed increase Stopped UTTI IR ITII SYST : T lement eater ontrol Recovery condition ompressor stops for 5 minutes then restarts. I temperature drops to 123 (253.4 ) or less. I temperature drops to 86 (186.8 ) or less. Inverter output voltage drops to under 140%. I_ input drops to 13.5 or less for 15 seconds. igh voltage rises to 235 V or more. igh voltage drops to 415 V or less. The I temperature sensor open circuit or short circuit judgment is canceled. I_ I_ I temperature drops to 108 (226.4 ) or less. I temperature drops to 81 (177.8 ) or less. urrent is decreased and compressor became able to operate at command speed. URT communications occur normally for 2 seconds or more. II:0000000006997101 SRITI ased on the air mix door position and signals input from each sensor, the / auto amp. calculates the target coolant temperature [ambient temperature approximately 70 (158 )]. -21
SYST < SYST SRITI > [UTTI IR ITIR] / auto amp. transmits the operating rate to the T element heater via I communications so that the calculated target coolant temperature is achieved. ased on the / auto amp. command, the control circuit inside the T element heater controls the heater output by the W method. SII1652 UTTI IR ITII SYST : eater ump ontrol II:0000000006997102 SRITI ased on the signals input from the sensors and the air mix door position, the / auto amp. calculates the operating rate for the heater electric water pump. The / automatic amplifier outputs the target operating rate to the heater electric water pump via the W signal. ased on the / auto amp. command, the heater electric water pump activates the pump and outputs pump operating status to the / auto amp. as the feedback signal. SII1670 UTTI IR ITII SYST : ode ontrol II:0000000006997103 SRITI When mode is selected with the electric shift selector, V transmits the mode request signal to the / auto amp.. -22
SYST < SYST SRITI > [UTTI IR ITIR] When the / auto amp. receives the mode request signal, it performs control that reduces the power consumption of the / system. SII1671 TR When mode is selected, warm-up/cool-down control (refer to -19, "UTTI IR ITI- I SYST : lectric ower istribution ontrol") is canceled and the special mode power distribution control is performed. The / auto amp. determines the / system power consumption based on the ambient temperature and set temperature. T: When mode control is activated, there will be a noticeable decrease in / capacity when temperatures are hot or cold. UTTI IR ITII SYST : Timer / ontrol II:0000000006997104 SRITI When timer / is set on the navigation screen, the navigation system transmits the timer / request signal and timer / time setting (set vehicle occupancy time) to V. SII1672 V starts 2 hours before the set timer / time, and sends a request to the / auto amp. for calculation of the / operating time required to achieve the target temperature, and receives the results. -23
SYST < SYST SRITI > [UTTI IR ITIR] When the operation time calculated by the / auto amp. has been reached, V starts the / auto amp. and starts pre-/. / RTI URI TIR / uring timer /, the / auto amp. operates the / under the conditions shown below. SII1676 Temperature setting Intake door positon ode door positon lectric compressor 25 (75 ) Recirculation / (during heating) uto (during cooling) If the charging plug is not inserted into the charging port at the time of timer / start, timer / operation does not start. If the charging plug is disconnected during timer / operation, timer / operation is stopped. UTTI IR ITII SYST : Remote / ontrol ax. 3500 rpm II:0000000006997105 SRITI When the user selects remote /, V starts the / auto amp.. uring remote /, the / auto amp. performs remote / control. V ends remote / when it judges remote / end. / RTI STTUS URI RT / uring remote /, the / auto amp. operates the / under the conditions shown below. SII1673-24
SYST < SYST SRITI > [UTTI IR ITIR] Temperature setting Intake door positon ode door positon lectric compressor / (during heating) 25 (75 ) Recirculation uto (during cooling) ax. 3500 rpm UTTI IR ITII SYST : ircuit iagram II:0000000006997106 SII1674-25
SYST < SYST SRITI > [UTTI IR ITIR] UTTI IR ITII SYST : ctuator Zero osition Reset II:0000000006997107 step motor actuator is used for the mod door actuator and air mix door actuator. ecause the step motors do not have position detection mechanisms, there may be a deviation between the door position recognized by the / auto amp. and the actual door position. Therefore, the / auto amp. performs actuator zero position reset in order to align its recognized door position with the actual door position. When either of the conditions below is met, then the / auto amp. performs actuator zero position reset when the power switch next turns or when pre-/ turns. The 12V battery terminal was disconnected and then reconnected. The power switch turned during operation of the mode door actuator or air mix door actuator a total of 60 times. uring zero position reset operation, the switch indicator flashes for several seconds. o switch operations are accepted during this time. -26
RTI < SYST SRITI > [UTTI IR ITIR] RTI escription II:0000000006997108 This / uses various sensors to detect temperature changes in the interior caused by factors such as changes in ambient temperature and sunload. When the desired temperature is set, the discharge air temperature, discharge air flow, and inlet/outlet changes are controlled automatically to maintain a constant interior temperature at all times. The air flow volume and switching of air inlets and air outlets can be selected manually without auto function. While using auto function, it is still possible to select a particular item manually. It is possible to use timer / or remote / to adjust the interior to a comfortable temperature before entering the vehicle. Switch ame and unction UT / SYST RTIS ISYS / Status isplay (Inside isplay) II:0000000006997109 / ontroller II1859ZZ II1847ZZ 1. UT switch 2. / indicator 3. switch 4. switch 5. Temperature control switches 6. Rear window defogger switch 7. switch 8. / switch 9. R switch 10. an control switch 11. R switch -27
RTI < SYST SRITI > [UTTI IR ITIR] UT switch / indicator switch switch Temperature control switches Rear window defogger switch / switch If the switch is pressed while the / is stopped, the switch indicator lamp turns, UT appears on the display, and the / system status is as shown below. - ir inlet: utomatic control - ir outlet: utomatic control - ir flow: utomatic control - ompressor: utomatic control If the switch is pressed while the / is operating and UT is, the switch indicator lamp turns, UT appears on the display, and all control switches to automatic control. T: When air outlet or air flow is manually operated while UT is indicated on display, UT indication turns. owever, automatic control continues for other functions than air outlet or air flow. While the /-eater Timer (limate trl.timer) operates, the indicator flashes. If the /-eater Timer (limate trl. Timer) is set to activate, the indicator illuminates. When each switch is pressed, air outlet is switched and VT, /, T, or / can be selected manually. T: ir outlet can be changed when air conditioner system is in the position. When switch is pressed while UT is indicated on display, air outlet automatic control is released ( UT turns ). mode (switch indicator lamp) changes between each time switch is pressed When switch is pressed while air conditioning system is in the position When mode turns, air conditioning system becomes the following status. - ir outlet: - ir flow: utomatic control (If an air flow other than UT is selected before pressing switch, blower fan is manual control.) - ir inlet: resh air intake - / switch: When mode turns, air conditioner system state returns to the previous state before mode was selected. When switch is pressed while air conditioner system is in the position ir conditioning system turns and changes to the following status. - ir outlet: - ir flow: utomatic control - ir inlet: resh air intake - / switch: When mode turns, entire air conditioner system turns. T: When mode is turned while UT is indicated on display, UT indication turns. owever, airflow automatic control continues. (This operation is excluded when airflow is set before switch is pressed.) peration of this switch sets the temperature setting in increments of 0.5 (1 ) within the range of 18.0 (60 ) to 32.0 (90 ). : Increase temperature setting. : ecrease temperature setting. T: When / system is, the set temperature can be selected only while the temperature setting is shown on the display (several seconds after switch is pressed). Refer to -5, "System escription". If the switch is pressed while the / is operating, the compressor and blower fan motor stop, and the outlets and inlets are set as shown below. - ir outlet: T - ir inlet: resh air intake (during automatic inlet control) If the switch is pressed while / is stopped, the / turns with the same settings as before it was stopped. -28
RTI < SYST SRITI > [UTTI IR ITIR] / switch R switch an control switch R switch If the / switch is pressed while the compressor is, "/ " appears in the / section of the display, the / switch indicator lamp turns (orange), and the compressor turns. When the / switch is pressed again, "/ " appears in the / display, the / switch indicator lamp (orange) turns, and the compressor turns. If the switch is operated while "UT" is shown on the display, automatic compressor control is cancelled (UT turns ). T: When blower fan motor is, compressor control cannot be activated. When the R switch is pressed, the inlet changes to R (recirculation) and the R indicator lamp turns. If the R switch is pressed and held for approximately 2 seconds or more when the inlet is R (recirculation), the R and R indicator lamps (orange) flash twice, and the inlet switches to automatic control. uring automatic control, the air inlet status (R, R) is indicated by the indicator lamp. If the switch is operated while "UT" is shown on the display, automatic intake control is cancelled (UT turns ). T: ir inlet can be changed when air conditioning system is in status. ir flow can be manually set within the range of speeds 1 7 using the fan control dial. +: Increase air flow. -: ecrease air flow. T: When this switch is operated while / system is, / system turns. If the switch is operated while UT is shown on the display, automatic air flow control is cancelled ( U- T turns ). When the R switch is pressed, the inlet changes to R (fresh air intake) and the R indicator lamp turns. If the R switch is pressed and held for approximately 2 seconds or more when the inlet is R (fresh air intake), the R and R indicator lamps (orange) flash twice, and the inlet switches to automatic control. uring automatic control, the air inlet status (R, R) is indicated by the indicator lamp. If the switch is operated while "UT" is shown on the display, automatic intake control is cancelled (UT turns ). T: ir inlet can be changed when air conditioning system is in status. -29
ISIS SYST (V) < SYST SRITI > [UTTI IR ITIR] ISIS SYST (V) escription II:0000000006997110 ir conditioning system performs self-diagnosis, operation check, function diagnosis, and various settings using diagnosis function of each control unit. Unit name iagnosis item (SUT display) / auto amplifier V control unit V V V V/V Self-diagnosis results ata onitor Work Support TIV TST Self-diagnosis results ata onitor TIV TST Self-diagnosis results ata onitor SUT unction II:0000000006997111 I IT SUT performs the following functions via communication with the / auto amp. iagnosis mode U identification information Self-diagnosis results ata onitor TIV TST Work Support UTI SRITI isplays part number of / auto amp. isplays diagnosis results that are judged by / auto amp. isplays I/ signals of / auto amp. orces supply of the signals which operate each load from the / auto amp. hanges the settings of various setting functions and performs automatic adjustment of components. U ITIITI IRTI art number of / auto amp. can be checked. S-ISIS RSUTS iagnosis results that are judged by / auto amp. can be checked. -40, "T Index". T ITR ommunication signals of / auto amp. can be checked. isplay Item ist onitor item [STTUS or UIT] SRITI mbient sensor [ / ] Value of ambient sensor detection value (voltage), converted to ambient temperature In-vehicle sensor [ / ] Value of in-vehicle sensor detection value (voltage), converted to interior temperature Intake sensor [ / ] Value of intake sensor detection value (voltage), converted to intake temperature Sunload sensor [W/m 2 ] Value of sunload sensor detection value (voltage), converted to sunload mbient sensor value [ / ] Value of ambient temperature calculated by / auto amp. In-vehicle sensor value [ / ] Value of interior temperature calculated by / auto amp. Intake sensor value [ / ] Value of intake temperature calculated by / auto amp. Sunload sensor value [W/m 2 ] Value of sunload calculated by / auto amp. ompressor request [n/ff] / signal / status lower fan request [n/ff] lower fan signal / status -30
ISIS SYST (V) < SYST SRITI > [UTTI IR ITIR] lower fan duty * X onitor item [STTUS or UIT] Target value of voltage (applied voltage) applied to lower fan motor by / auto amp. Target discharge air temperature judged by / auto amp. according to the temperature setting and the value from each sensor R R [rpm] Rotation speed of electric compressor R IUT WR SI [W] ower consumption value of electric compressor R IUT RT R [] Input current value of electric compressor R I T SI [ / ] etection value of I temperature sensor inside electric compressor R IUT VT SI [V] Input voltage value of electric compressor R ISR T VRT R I VRT R VT STUR- TI R VR URRT [/] [/] [/] [/] If the compressor discharge refrigerant temperature (estimated value) exceeds 130, status is. If the I temperature exceeds 125 within 1 minute after start, status is. If the I temperature exceeds 88 1 minute or more after start, status is. If the inverter output voltage increases to 140% or more, status is. Start failed 3 times because current of 35.1 or more flowed within 90 seconds after start. urrent of 35.1 or more flows when compressor is stopped. R VR [/] If the input current of the electric compressor increases to 13.5 or more, status is. R W VT R- RR R I VT R- RR RRR V - R R I T S RRR R SUT SI R- RR R R,R, R- RR R ISR T IIT [/] [/] [/] [/] [/] [/] [/] If the input voltage of the electric compressor lowers less than 230 V, status is. If the input voltage of the electric compressor exceeds 420 V, status is. If the electric compressor recognizes an URT communication error, status is. If an open circuit or short circuit is recognized for the I temperature sensor, status is. If the shunt signal in the electric compressor is judged abnormal, status is. If any data error is detected in the R or R area of the electric compressor, status is. If the discharge temperature estimated value exceeds 110, status is. R I T IIT [/] If the I temperature exceeds 83, status is. R W S VR RRR - V [/] [/] If the compressor cannot rotate at the specified speed, status is. If the / auto amp. recognizes an URT communication error, status is. T TR RQUST [%] perating rate sent to the T element heater by the / auto amp. T TR IRUIT [/] If the diagnosis value for the control element inside T element heater exceeds the specified value, status is. T VRT RT- TI [/] If the board temperature inside T element heater exceeds the control value, status is. T TR VT [/] If the voltage applied to T element heater exceeds the specified value, status is. T TR IRUIT 1 [/] If the diagnosis value for the control element 1 inside T element heater exceeds the specified value, status is. T TR IRUIT 2 T TR IRUIT 3 [/] [/] SRITI If the diagnosis value for the control element 2 inside T element heater exceeds the specified value, status is. If the diagnosis value for the control element 3 inside T element heater exceeds the specified value, status is. -31
ISIS SYST (V) < SYST SRITI > [UTTI IR ITIR] onitor item [STTUS or UIT] T TR IRUIT 4 T I UITI T UITI T ITR RRR T - V US RIT W- R [/] [/] [/] [/] [/] [W] If the diagnosis value for the control element 4 inside T element heater exceeds the specified value, status is if so designed. If the T element heater recognizes an error in the I communication from the / auto amp., status is. If the / auto amp. recognizes an error in the I communication from the T element heater, status is. If an error is detected in the connection check for the T element heater high-voltage connector, status is. If the / auto amp. recognizes an error in the I communication from the T element heater, status is. ower available to electric compressor calculated by / auto amp. RRIRT R S [pa] Refrigerant pressure sensor detection value sent from V R SI [/] State of input signal to / auto amp. R IT R SI [/] State of input signal to / auto amp. R-IT SI [/] State of input signal to / auto amp. V SY/ [/] State of input signal to / auto amp. RRR V - V [/] If the / auto amplifier recognizes an error in the communication from V, status is. T SUTI VT [W] ower available to T element heater calculated by / auto amp. WTR TSSR [ / ] Value of heater fluid temperature sensor detection value (voltage), converted to temperature U R (IRTI) [rpm] Value sent to heater pump by / auto amp. U R (TIV) [rpm] ctual rotation speed of heater pump U T R I- UT SI [/] SRITI If the heater pump cannot read out any W signal output from the / auto amp., status is. / RTI IIT [/] If a pump malfunction is detected, the status is. TR U VT [/] If the heater pump input voltage is less than 8 V or is 16 V or more, status is. TR U UT [/] If a pump malfunction is judged, status is. RRR / V [/] If the UTY signal from heater pump is not normal, status is. *: UTY is displayed however the voltage is indicated. r value is not displayed, but unit is (V). TIV TST The signals used to activate each device forcibly supplied from / auto amp. operation check of air conditioning system can be performed. V test V Test Test item SRITI The operation check of / system can be performed by selecting the mode. Refer to the following table for the conditions of each mode. -32 Test item ode 1 ode 2 ode 3 ode 4 ode 5 ode 6 ode 7 ode door actuator position VT VT / / T * / Intake door actuator position R R R 20%R R R R ir mix door actuator position U U U alfway alfway U T U T lower fan motor (applied voltage) 5 V 8.5 V 10.5 V 8.5 V 8.5 V 8.5 V 5 V lectric compressor (rpm) (2000) (2000) (3000) (2000) (0) (0) (0)
ISIS SYST (V) < SYST SRITI > [UTTI IR ITIR] Test item ode 1 ode 2 ode 3 ode 4 ode 5 ode 6 ode 7 T element heater operating rate 0% 0% 0% 50% 50% 50% 0% eater electric water pump operating rate 10% 10% 10% 20% 20% 50% 40% *In T mode, position of mode door actuator (driver side) is set to the status that is selected for blow setting to. Refer to -56, "oot osition Setting Trimmer". WR SURT Setting change of various setting functions and automatic adjustment of components can be performed. Work item SRITI Refer to Set temperature correction R memory setting R memory setting low setting in T mode X rotation compensation in ri ir onditioner X rotation compensation in I ctuator zero position reset If the temperature experienced by the passenger is different than the discharge air temperature controlled by the temperature setting, the / auto amplifier control temperature can be corrected with regards to the temperature setting. R memory function setting can be performed. R memory function setting can be performed. In T mode, the air blow to can be turned /. ompressor X rotation in ri ir ondition is compensated. ompressor X rotation when vehicle stopped is compensated. Zero position reset of air mix door actuator and mode door actuator can be performed. -55, "Temperature Setting Trimmer" -55, "Inlet ort emory unction (R)" -56, "Inlet ort emory unction (R)" -56, "oot osition Setting Trimmer" -56, "Setting of compressor maximum rotation speed during pre air conditioning" -57, "Setting of compressor maximum rotation speed during idling" -58, "Work rocedure" -33