Parts Location: Air Conditioning - Air Conditioning System
Parts Location: Air Conditioning - Air Conditioning System
AIR CONDITIONING
                                AIR CONDITIONING          - AIR CONDITIONING
                                                 - AIR CONDITIONING SYSTEM SYSTEM
                                                                                                           AC-3
                                4.
                                 BE CAREFUL NOT TO GET LIQUID REFRIGERANT
PARTS LOCATION                   IN YOUR EYES OR9.ON BE      YOURCAREFUL
                                                                      SKIN NOT TO OVERCHARGE SYSTEM WITH
                                                             REFRIGERANT
                                 If liquid refrigerant gets in your eyes or on your skin:
HATCHBACK:                     (a       Wash the area with Iflots
                                                               theofrefrigerant is overcharged, it causes problems such as
                                                                      cold water.
                                 )      CAUTION:             insufficient  cooling,
                                                                       ENGINE ROOM  poor RIB
                                                                                         fuel NO.2
                                                                                              economy and engine
                                        Do not rub your eyes overheating.
                                                               or skin.- HTR SUB2 RELAY*
                               (b                       10.  DO  NOTtoOPERATE
                                        Apply clean petroleum jelly       the skin. ENGINE AND COMPRESSOR
 LIQUID TUBE SUB-              (c)      Go immediately to aWITHOUT       orREFRIGERANT
                                                              hospital- HTR see  a physician
                                                                              SUB3   RELAY* for
 ASSEMBLY A                      )                           CAUTION:
                                        professional treatment.
                    AC02811
                            5.   NEVER HEAT CONTAINER        ThisORmay    damageITthe
                                                                        EXPOSE        TOinside of the compressor.
                                 NAKED FLAMES
 - AIR CONDITIONING         6.   BE CAREFUL NOT TO DROP CONTAINER OR
 PRESSURE SENSOR                 SUBJECT IT TO PHYSICAL SHOCKS
                            7.   DO NOT OPERATE COMPRESSOR WITH
 Wron    Okay                    INSUFFICIENT REFRIGERANT IN REFRIGERANT
    g
                                 SYSTEM
                                                                                                   -
                                                                                - HTR FUSE
                                      charging cylinder to rupture.
                                                                                - HTR SUB1 FUSE*
                                 AMBIENT TEMP       JURE SENSOR
                                                                                - HTR SUB2 FUSE*
BLOWER UNIT
*: WI PTC HEATER
 H                                                                                                         E114512E05
       AC-4             AIR CONDITIONING
                                  AIR CONDITIONING
                                         - AIR CONDITIONING
                                                    - AIR CONDITIONING
                                                            SYSTEM SYSTEM
                                                                                            AC-5
        SEDAN:
HATCHBACK:
                                                                      ENGINE ROOM RIB AND JIB -
                        MAIN BODY ECU
                                                      COMBINATION METER
                                                                     HTRASSEMBLY
                                                                         SUB2 RELAY*
                        (INSTRUMENT PANEL JIB)
                                                                      - HTR SUB3 RELAY*
         LIQUID TUBE SUB-ASSEMBLY A
                        - HTR RELAY
         - AIR CONDITIONING
                     - GAUGE FUSE
         PRESSURE SENSOR
CONDENSER
E119791E03
*: W/PTC HEATER
                                                                                                         E133589E01
        AC-6         AIR CONDITIONING
                                 AIR CONDITIONING
                                       - AIR CONDITIONING
                                                   - AIR CONDITIONING
                                                          SYSTEM      SYSTEM
                                                                                       AC-7
SEDAN:
- AlC FUSE
                                                                                       E114503E10   E133590E01
        AC-8
        AC-10                               AIR CONDITIONING - AIR CONDITIONING SYSTEMEngine Coolant
                                                                              Sensor
                                                                 SYSTEM DESCRIPTION
                                                                        DIAGRAM
           ECM
                                                                 1       GENERAL
                                                                 .       (a) The air conditioning system has the following features:
                                               r
                                               -
                                                                              The air conditioning amplifier controls the operation
                                                                              of parts, suchCompressor
                                                                                              as the air and Pulley
                                                                                                         conditioning compressor,
                                                                              automatically in accordance with the operating
                                        ~                                           wi PTC
                                                                              conditions  ofHeater
                                                                                             the air conditioning system.
Combination Meter Assembly                                               MODE POSITION AND DAMPER OPERATION
                                         r
                                                                 2.                I       ,----------------
                                                                                  I              Headlight Control
                                                                                  I
                                                                                                 Switch
Ambient Temperature Sensor                                                        I
                                                                                  I
                                                                                   I             Generator (Alternator)
            Air Inlet Control Damper                                              I                                       Mode Control Damper             \
                                                                                  I
                                                Evaporator                    Heater Core
                                                                                  I
                                                                                   I
Evaporator Temperature Sensor                          Air Conditioning                             HTR SUB1 Relay                 -
                                                       Amplifier                                 Front Defroster
                                                                                       ~---------
                                                                                                     HTR SUB2 Relay                -
                                                                                                                                       C
                                                                                                 PTC HeaterFAssembly
Heater Control Base (AiC Switch,
                                                                                                                                 -
                                                                                                             # I
                                                                                                                G ~ '\"""-
Defroster Mode Detection Switch)
                                                                                                                                 -
                                                                                                                                 -Footwell
                                                                                                                               Front
                                                                                                                               Register
                                                                                                 No.3 Heater Control Knob
Heater Control (Blower
                                                                                                 (Max Hot Switch)
Switch)
                                                                                           ,----------------
               !
                                       Air Mix Control
                                       Damper
;J M, L, E, J side registers.
                               .. ,.,
                                                                some air from front defroster.
                             FOOTIDEF                           Blows air from front defroster,
                                                                side registers, front footwell
                                                 0, K,G,H
                                1,.J                            register, and rear foolwell
                                                                register.
                                DEF                             Blows air from front defroster and
f,J FOOTIDEF X 0 0 0
                    I
        CAN DTC is not output                                  A
                                                               HINT:
              3
          CAN DTC isINSPECT
                     output           BATTERY VOLTAGE
           OVERALL ANALYSIS AND TROUBLESHOOTING
                                                           B
                                                               Check from the rear of the connector while it is
                                  Result                       connected to the air conditioning
                                                                                             Proceedamplifier.
                                                                                                     to
                                                          (a) Data Standard
                                                                   List / Activevoltage:
                                                                                 Test    11 page
                                                                                       (See to 14AC-20).
                                                                                                    V
            Fault is not listed in problem symptoms table                                        A
                                                                   If theofvoltage
                                                          (b) Terminals            is below
                                                                            ECU (See    page11  V, recharge or replace the battery
                                                                                              AC-16).
             Fault is listed in problem symptoms table                                           B
                                                                   before proceeding.
                        Symptom                                                       Suspected area                          See page
                                                           AlC Fuse                                                                -
              SEDAN:
 No functions of AlC system operate                        Wire harness or connector                                               -
    8 I ADJUST, REPAIR OR REPLACE Air conditioning amplifier
                    I
                                                                                                                                AC-16
                                                                        (a)
                                                           Wire harness or   Use an
                                                                           connector  intelligent tester to check if the CAN
                                                                                                                           -
                                                           Blower resistor        communication system is functioning. AC-203
                                                                                                                          Result
    9 I CONFIRMATION TEST                                  Blower motor                                                        AC-200
 Airflow Control: blower motor does not change speed       Heater control (for Hatchback)                                      AC-254
                                                                          ~I
                                                           Refrigerant pressure                                                 AC-62
                                                           Heater control base (for
                                                                                GOHatchback)
                                                                                    TO CAN             COMMUNICATION        AC-253
                                                                                                                         SYSTEM
                                                           Heater control base (for Sedan)                                     AC-242
                                                           Air conditioning pressure sensor                                    AC-230
 Temperature Control: No cool air comes out                Compressor and pulley                                               AC-207
                                                                                 Result
                                                           Air conditioning pressure sensor                         AC-230
 Compressor and pulley do not operate                      Evaporator temperature sensor (for Hatchback)                       AC-137
                                                           Evaporator temperature sensor (for Sedan)
                                                                                           Result                               AC-96
                                                                                                                                Proceed to
                                                           Air conditioning amplifier DTC is not output                         AC-16A
                                                           ECM                                                                  ES-26
                                                           CAN communication                                                    CA-9
 Symbols (Terminals No.)                 Wiring Color          Terminal Description                    Condition       Specified Condition
 S5-3 (E8-1) - GND (E8-12)                  Y - W-B                Power supply for             Ignition switch: ON       4.5 to 5.5 V
                                                                   pressure sensor
                                                 CAN communication                                        Pulse generation
TX+ (E8-2) - GND (E8-12)         V- W-B                                      Ignition switch: ON
                                                         line                                            (see waveform 1)
                                                 CAN communication                                        Pulse generation
TX- (E8-3) - GND (E8-12)         W-W-B                                       Ignition switch: ON
                                                         line                                            (see waveform 2)
   SG-2 (E8-4) - Body                           Ground for evaporator
                             L - Body ground                                       Always                   Below 1.0 Q
         ground                                  temperature sensor
                                                 Ambient temperature         Ignition switch: ON
TAM (E8-5) - SG-1 (E8-11)         W- B                                    Ambient temperature: 25           1.35to 1.75V
                                                    sensor signal
                                                                                      °c
PRE (E8-6) - SG-1 (E8-11)         GR-B           AlC pressure sensor        Refrigerant pressure:          0.76 to 4.74 V
                                                        signal                     normal
                                                                             Refrigerant pressure:
                                                                                   abnormal
PRE (E8-6) - SG-1 (E8-11)         GR-B           AlC pressure sensor      (less than 0.196 MPa [2.0    Below 0.76 Vor4.74 Vor
                                                        signal            kgf/cm2j or more than 3.14           more
                                                                              MPa [32 kgf/cm2j)
                                                                                Engine idling
 SOL+ (E8-7) - GND (E8-                            AlC compressor                                        Pulse generation
                                LG - W-B                                      Blower switch: 1
          12)                                      operation signal                                      (see waveform 3)
                                                                               AlC switch: ON
IG+ (E8-8) - GND (E8-12)        Y - W-B           Power source (IG)          Ignition switch: ON             11 to 14V
Hatchback:
                                                                 HINT:          DIAGNOSIS
                                                                     (a) Waveform                    Below SYSTEM
                                                                                           1 (Reference)     10°C: Using
                                                                                                                     (50°F) an oscilloscope
                                                                 Connect CAN the cable      of the intelligent
                                                                                      communication             signal tester to the CAN VIM,
                                           1 V/DIV                                                   Blower switch: 0 ~ 1
                                                                 connect the1.CAN      DESCRIPTION
                                                                                           VIM to the DLC3, turn the ignition switch ON
                                                                 and attempt    (a)toAir
                                                                                       use  the Waiting
                                                                                                  tester.time:
                                                                                          conditioning       If   30 seconds
                                                                                                                the
                                                                                                             system     display
                                                                                                                          data andindicates    that a
                                                                                                                                       the Diagnostic     Trouble
    HEAT* (E9-14) - Body                                         communication
                                                                       MAX HOT switch   error   has
                                                                                              Codes   occurred,
                                                                                                         (DTCs)        there
                                                                                                     Ignition switch: ONcan be is  a problem
                                                                                                                                  read  through  either
                                                                                                                                                    the  Data Link
                                     LG - Body ground
                                                                 with the vehicle or with         the
                                                                                              Connector tester.
                                                                                                  No.3 heater 3     (DLC3)
                                                                                                                control  knob: of the vehicle.      When the system
                                                                                                                                            11 to 14V
           ground                                                 If communication
                                                                        detection signal       is normal
                                                                                              seems      toMaxwhen
                                                                                                              be Hot the tester is connected to
                                                                                                                    malfunctioning, use an intelligent tester
                                                                             HINT:
    HLS* (E9-23) - Body                                             another vehicle, inspect  withvaries
                                                                                                     CANthe
                                                                                                        Engine DLC3
                                                                                                              VIM idling of the original vehicle.
                                                                                                                       connected,
                                                                             The waveform                    depending         on thetoCANcheck for malfunctions
                                     LG - Body ground             Headlight
                                                                    If communication           is
                                                                              control signal and
                                                                             communication signal.still
                                                                                                  Light not   possible
                                                                                                        control
                                                                                                     perform     switch:    when
                                                                                                                          OFF
                                                                                                                   troubleshooting.  the
                                                                                                                                     11 totester   is 1 V
                                                                                                                                           14 V ~ Below
           ground
                          10 u sec.lDIV                             connected to another vehicle,           ~HEAD  the problem is probably in
  ALT* (E9-24) - GND (E8-                      A086154E01
                                                                    the   tester
                                                                      Alternator
                                                                                       CHECK
                                                                                2.operation
                                                                                    itself. Consult DLC3the    Service Department            listed in
                                          P - W-B                                                       Engine idling                   Pulse generation
             12)                                                                       (a)  The    ECU
                                                                    the tester's instruction manual.
                                                                             signal                        uses ISO 15765-4 for             communication.
 r                                                                   (b) Waveform 2 (Reference)
                                                                                              The terminal: arrangement
                                                                                                                    Using an oscilloscope
                                                                                                                                       of the DLC3 complies
 -
 -                       'Intelligent Tester1 V/DIV
                                                                             CAN communicationwith SAE J signal 1962 and matches the ISO 15765-4
Sedan:                             r
                                   +
                                                                                              format.
         B1412/12
                   2
                  INSPECT I  AMBIENT
                         Ambient Temperature
                                               sensor
                                          TEMPERATURE
                                               - Harness andSENSOR
                                               between ambient
                                                               connector
                                                                                   -                                                            AC-23
                         Sensor Circuit        temperature sensor and
                                                              (a)amplifier
                                               air conditioning   Remove the ambient temperature                                            sensor.
             Component Side:                                 (b) amplifier
                                               - Air conditioning Measure the resistance.
                                                                                         Standard resistance
                                                                    - No .1 cooler thermistor
                                                                            OK:temperature
                                                                    (evaporator
                          Ambient Temperature Sensor                sensor) The display is as specified in the normal condition
                                                                    - Harness and connector
         B1413/13
                                      Evaporator Temperature                  column.
                                                                    between No .1 cooler                 -               AC-27
Result                                       Sensor
                                      Sensor Circuit     Area       thermistor (evaporator
                                                                    temperature sensor) and
                                                                    air conditioning amplifier
                                                                    - Air conditioning amplifier
                                                                    - Air conditioning
                                                                    pressure
                                                                    sensor
                                                                    - Harness and connector
         B1423/23                     Pressure Sensor Circuit       between air conditioning             -               AC-31
                                                                   ~pressure
                                                                       PROCEED          TO
                                                                               sensor and  air NEXT CIRCUIT INSPECTION SHOWN IN
                                                                    conditioning amplifier
                                                                                       PROBLEM SYMPTOMS TABLE
                                                                   ~I
                                                                    - Air conditioning amplifier
                                                                    - Compressor and pulley
            WIRING   DIAGRAM
               Resistance (kG)                                             REPLACE AIR
                                                                    - Harness and connector
                                                                                                     CONDITIONING AMPLIFIER
                                      Compressor Solenoid           between air conditioning
         B1451/51                                                                                                   -                           AC-37
                                      Circuit                       amplifier and compressor
                                                                    and pulley
                                                                    - Air conditioning amplifier
                                                             - Air conditioning amplifier
                                                             power source circuit
                                                             - Air conditioning amplifier                                        Air Conditioning Amplifier
                                     Multiplex Communication
         B1499/99                                            -ECM                                                   -                           AC-41
                                    Ambient
                                     Circuit Temperature Sensor
                                                             - Combination meter
                                                             assembly
                                                             - CAN communication line
                          DTC No.                                  DTC Detection Condition                                           Trouble Area
                                                                                                                ·
                                                                                                                        Harness and connector between ambient
                    50    68
                    B1412/12               0         104 Open
                                                           122140CF)
                                                              or short in ambient temperature sensor                    temperature sensor and air conditioning
                                          86                                     circuit                                amplifier
                                        Temperature
                                                                                                                ·       Air conditioning amplifier
E106870E09
            r.TI"'\
                                                                                                     TAM
            \...!.ll..I
I SG-1 E114515E05
         The- No.1
         B5-1          cooler thermistor (evaporator
                E8-11 (SG-1)                                        (a) Remove
                                                    Below temperature
                                                           1Q                       theisevaporator
                                                                              sensor)     installed ontemperature
                                                                                                         the evaporator   sensor.
                                                                                                                              in the air
           Component Side:                             (a) Disconnect
                                                                    (b)      the
                                                                        Measure  B5
                                                                                 E2   ambient
                                                                                      No.1
                                                                                     the    cooler
                                                                                                temperature
                                                                                         resistance.thermistor    sensor
                                                                                                                   (evaporator
 Wire    conditioner
         B5-2            unit to detect the temperature
              - E8-5 (TAM)                          Below 1 Qof the cooled air that has passed through the evaporator and to
 Wire Harness
      Harness Side:
                 Side:                                        temperature
                                                              connector.        sensor)resistance
                                                                                         connector.
         control
         B5-1      the
              - Body     air conditioner. It sends
                      ground                         signals
                                                 10 kQ       OK:to the airStandard
                                                        or higher
                                                       (b)  Disconnect       conditioning
                                                                             the            amplifier, which
                                                                                 E8 air conditioning     amplifierchange     in accordance
                                                                                                                       connector.   (c)     with
         the  resistance
         B5-2 - Body ground  of the No.1  cooler  thermistor
                                                 10 kQMeasure    (evaporator
                                                                Thethe
                                                        or higher     display    temperature      sensor).    As  the
                                                                                 is as specified in the normal condition
                                                                         resistance.                                    temperature   decreases,
     No.1the
          Cooler  Thermistor
              resistance        ConnectorAs the temperature increases, the resistance decreases. The air conditioning
                             increases.
  Ambient
 DTC No.   Temperature     Sensor  Connector                    column.
                                                              Standard
                                                      DTC Detection          resistance
                                                                     Condition                                Trouble Area
Result amplifier applies a voltage (5V) to the No.1 cooler thermistor (evaporator                      temperature       sensor) and reads
         voltage changes as changes in the resistance of the evaporator temperature              ·
                                                                                                 No.1 cooler thermistor (evaporator
                                                                                                 temperaturesensor.
                                                                                                              sensor) This sensor is used for
         frost prevention.
                                                                                                 ·
                                               Open or short in evaporator temperature           Harness and connector between No.1
                            81413/13                                          sensor circuit          cooler thermistor (evaporator temperature
                                                                                                      sensor) and air conditioning amplifier
                     Front
                    Front
    porator Temperature    View
                           View
                        Sensor /                                                                 ·    Air conditioning amplifier
                                                       GJ~ I
          Air Conditioning Amplifier Connector
                                                                ~  REPAIR   OR
                                                                          NOTICE: REPLACE        HARNESS OR
      I        \..!!!.I
      w/o PTe Heater:
     w/o PTeWIRING
               Heater:
                                                                     REPLACECONNECTOR
                                                                                 AIR CONDITIONING AMPLIFIER
                                                                          Touching the sensor even slightly may change the
                              DIAGRAM                                         resistanceSG-2
                                                                          NOTICE:            value. Be sure to hold the connector of the
                  1ilH1Lt~==?J=~               ~q;J
                                          Measurement Item I Display
                                                                              sensor.
                                                                          Touching the sensor even slightly may change the
                                                                           When      measuring,
                                                                              resistance     value. Be thesure
                                                                                                            sensor     temperature
                                                                                                                  to hold     the connectormust ofbethe
                                                                                                                                                     the
                  Item                                                        same Normal Condition
                                                                                      as the ambient temperature.       Diagnostic   Note
                Resistance (kG)                     (Range)                   sensor.
                                           Evaporator fin thermistor I    HINT:
                                                                           When      measuring, the sensor            temperature
                                                                                                                Open circuit:              must be the
                                                                                                                              -29.7°C (-21.46°F)
           EVAP FIN TEMP
                                            Min.: -29.7°C (-21.46°F)      AsActual
                                                                              the  evaporator temperature
                                                                                   temperature      increases,
                                                                              same as the ambient temperature.     the  resistance
                                                                                                                     Short circuit:      decreases (see
                                                                                                                                    59. 55°C
                                                                          the  graph on the left).               Air Conditioning       Amplifier
       (Evaporator fin thermistor)        Max.: 59.55°C (139.019°F)
                                                                          HINT: is displayed                              (139.019°F)
                                   Result                                 (c) Reinstall the evaporator        temperature
                                                                                                        Proceed to               sensor.
                          Ev                                              As the temperature increases, the resistance decreases (see
                          a         NG                                   ~the  graph on NO.1
                                                                            REPLACE        the left).
                                                                                                   COOLER   A THERMISTOR
           OK (Checking from the PROBLEM SYMPTOMS TABLE)                  (c) Reinstall the ambient temperature
                                                                                                            B               sensor.
                                                                                           (EVAPORATOR           TEMPERATURE SENSOR)
      wI
      wI PTe   Heater: OK (Checking from the DTC)
         PTe Heater:                                                                                        C
                                                                         ~ REPLACE AMBIENT TEMPERATURE
    1
    9                                                                                      SENSOR
    .8
     .7
      .6                                       10            20            30
       .5                                      50            68            86
        .4                                       Temperature             (0C)
         .3                                                              (OF)
          2
          .1
           .0.0         0                                               E113141E03
            -1 014     32
                                                         E119776E01
                                                         E119777E02                                                                                E114518E03
    H
          Tester Connection                Condition                    Specified Condition
                     1INSPECTION
                       -2        PROCEDURE
                                 -10°C (14°F)                             7.30 to 9.10 kQ
I   REPLACE
         1-2
                     1-2
             AIR CONDITIONING
                  READ VALUE
                                          _5°C (23°F)
                                 AMPLIFIER 4.40 to 5.35 kQ
                         O°C (32°F)
                                 USING INTELLIGENT
                                                                          5.65 to 6.95 kQ
INSPECTION  PROCEDURE
                                                                                                              ·  Air conditioning pressure sensor
                                                                                                              ·
                                                                                                                 Harness and connector between air
         81423/23
   3 CHECK    4 HARNESS
          INSPECT      AIR I
                       INSPECT    AIR CONDITIONING
                                 AND
                           CONDITIONINGCONNECTOR
                                              PRESSURE
                                                             Open or short in pressure sensor circuit
                                                            AMPLIFIER
                                                         (PRESSURE
                                                             SENSOR SENSOR -
                                                                                                                 conditioning pressure sensor and air
                                                                                                              AIRconditioning
                                                                                                                   CONDITIONINGamplifier
      I   AMPLIFIER)
   1 CHECK REFRIGERANT
                     +                                                                                        ·  Air conditioning amplifier
           Vehicle Doors
                         ~®                      Condition
                                                 Fully open
                                                                  (c) Turn the ignition switch ON.
                                                                  (d) Measure the voltage.
                                                                        Standard voltage
 wI PTe Temperature
        Heater: Setting                                              MAX COLD
              -~~+                                                                               Tester Connection                         Specified Condition
                Blower Speed        !=..'(PR                           (f)HI Reinstall the air conditioning amplifier.
                  AlC Switch           @-                               ON (2) Compare     E8-1the     sight
                                                                                                  (55-3)  - E8-11glass  to the following chart.
                                                                                                                   (SG-1)                          4.5 to 5.5 V
                        Front
                    wI PTe    View
                           Heater:                                    ~ REPLACE LIQUID
                  Item                                                                     Amount TUBE          SUB-ASSEMBLY             A (AIR
              WIRING DIAGRAM                            Symptom                    (e) Reinstall     of the
                                                                                                         Refrigerant               Corrective
                                                                                                              air conditioning amplifier.      Procedures
                                                                                    ~I
                                                                                        CONDITIONING PRESSURE                      SENSOR)
                                                                                                                              (1) Check for gas leakage and
              [~~SG_1                                                 (d) Reconnect       the air conditioning
                                                                                   ~ PROCEED
                                                                                         REPLACE          TOAIR NEXT     pressure
                                                                                                                        CIRCUIT        sensor
                                                                                                                              repair ifINSPECTION
                                                                                                                   CONDITIONING            AMPLIFIERSHOWN IN
                                                                                                                                        necessary
    Air Conditioning
               1     Amplifier Connector
                                  Bubbles visible                                    Insufficient'
                                                                              connector.                 PROBLEM SYMPTOMS                   TABLE
                                                                                                                              (2) Add refrigerant until bubbles
                   o60.392                 3.187
                                             OFF, Mpa   (32.5)
                                                  refrigerant foams and then         Correct                                               -
                          (4)              (kgf/cm2)
                                             becomes clear
                                                 Measure Item I Display
                  Item                                                                     Normal Condition                        Diagnostic Note
                                                         (Range)
                                                        1101567E02
                       E
                      Motor Circuit                                                                       SOL+
       5  CHECK 3
                6
            CHECK   MAIN    BODY
                        CHECK
                       HARNESS
                        INSPECT      ECU
                                   HARNESS
                                    HEATER     AND CONNECTOR
                                     AND CONNECTOR
                                              CONTROL       (BLOWER
                                                                (COMPRESSOR
                                                                (BLOWER     (MAIN
                                                                            (COMPRESSOR
                                                                          SWITCH)
                                                                            (HTR     BODY
                                                                               RESISTOR
                                                                                    FUSE AND- ECUPULLEY
                                                                                                 MAIN  AND
                                                                                                         - BODY
                                                                                                  - BLOWER HEATER
                                                                                                              PULLEY
                                                                                                              - BODY   CONTROL
                                                                                                                  MOTOR)
                                                                                                                    ECU)   - AIR
                                                                                                                          GROUND)      (BLOWER
I I         DESCRIPTION
    2 INSPECT
            When
             Wire
                        SWITCH))
                        CONDITIONING
                    HTR RELAY
                   the heater
                   Harness   Side:
                                            AMPLIFIER)
                                  control (blower switch)(a)
                                                          (a)Remove
                                                              Disconnect
                                                               is set (a)
                                                                       to the
                                                                           Disconnect
                                                                               the
                                                                                HTR
                                                                           Remove
                                                                          position  C8
                                                                                    E3
                                                                                     1relay
                                                                                          blower
                                                                                          compressor
                                                                                        the
                                                                                          orthe from
                                                                                                  4Lresistor
                                                                                              heater
                                                                                              higher,  main
                                                                                                       the
                                                                                                         theand
                                                                                                             main
                                                                                                              body
                                                                                                        control connector.
                                                                                                                  pulley
                                                                                                                    body
                                                                                                                     ECUofconnector.
                                                                                                                  (blower
                                                                                                              contact       ECU.
                                                                                                                             connector.
                                                                                                                                   (b) relay
                                                                                                                              switch).
                                                                                                                            the  HTR    (b) is closed,
     Wire Harness
             Component
                   Side:   Side:                                                                   C8  compressor      and    pulley  connector.   (b)
                         1
     WireBody
    Main  Harness
              ECU Side:
            current  flows
                    Rear    to
                           View:the blower   motor,  and Measure
                                                          Measure
                                                          (b)
                                                            theDisconnect
                                                                     the
                                                                      (b)
                                                                 blowerthe
                                                                      (a)  Measure
                                                                           resistance.
                                                                            resistance.
                                                                               the
                                                                           motor    E4
                                                                           Disconnect    the
                                                                                          blower
                                                                                            the
                                                                                    operates.  voltage.
                                                                      (b) Measure the resistance. E1 motor
                                                                                                    Theheater connector.
                                                                                                           blowercontrol
                                                                                                                    motor    (c)
                                                                                                                           (blower
                                                                                                                             speed   switch)
                                                                                                                                     can  be changed
              Wire Harness
                   Harness Side:                          (a) Remove  Disconnect       the   E8fromair conditioning    amplifier    connector. (c)
            byWire
                exchangingSide:the ground and the blower  Measure      thethe
                                                                Standard
                                                                 Standard
                                                                      Standard
                                                                 resistor       HTR
                                                                            resistance.
                                                                              resistancerelay
                                                                               resistance
                                                                            circuit voltage
                                                                                     with
                                                                             connector.      the
                                                                             Standard resistance
                                                                                                        thecontrol
                                                                                                   heater    main body(blowerECU.   (b)
                                                                                                                                 switch).
                     Main Body ECU  ~ Rear View           Measure     Measure
                                                                       theMeasure
                                                                 Standard
                                                                      (b)          the the
                                                                            resistance.
                                                                               resistance resistance.
                                                                                              voltage.
            Blower
              ITEM Resistor
         Compressor andHeater Connector
                          Pulley      Measurement
                                 Connector
                              Control (Blower     Item / Display Standard
                                               Switch)
              Heater Control (Blower Switch) Connector              Tester   Standard
                                                                                Normal
                                                                               resistance
                                                                           Tester
                                                                             Connection
                                                                                  Connectionresistance
                                                                                        Condition                      Diagnostic
                                                                                                               Condition
                                                                                                                   Specified      Note
                                                                                                                             Condition
                                                                                                                                     Specified Condition
                                                                             Standard       voltage
                   WIRING  DIAGRAM
                       Compressor and
                                   ~ Pulley Connector
                                      Regulator control current /                        C8-2Value
                                                                                         Tester
                                                                                             4L-1  -changes
                                                                                                 Connection
                                                                                              - Body Body    between 0 A
                                                                                                           ground
                                                                                                      ground                         Specified
                                                                                                                                   Always BelowCondition
                                                                                                                                                1Q                11to14V
          REG CTRL CURRNT                                                                   and 0.997 A in accordance with
                                                                                             E3-4 - E4-                                     Below 10
        (Regulator control current)                          Min.: OA
                                                                     ~
                                                                     (c)PROCEED
                                                                           Reconnect         1 compressor and pulley
                                                                                            TO
                                                                                             theNEXT
                                                                                     (c) Reconnect
                                                    Max.: 0.997 A (d) Reconnect the operation
                                                                                                    compressor CIRCUIT
                                                                                                              the    main  and    INSPECTION
                                                                                                                               body pulley
                                                                                                                                        ECU   connector. - ~ ~ IN
                                                                                                                                                        SHOWN
                                                                                                                                                 connector.
                                                                    (c) Measure the                 blowerSYMPTOMS
                                                                                               voltage.
                                                                                           PROBLEM                resistor connector.   TABLE
                                                                           ~I
                                                                     REPAIR
                                                                     (e) Reconnect   REPAIR
                                                                                     OR REPLACE
                                                                                             theOR  blower REPLACE
                                                                                                               HARNESS          HARNESS
                                                                                                                  motor connector.  OR CONNECTOR  OR AirCONNECTOR
                                                                                                                                                          Conditioning Amplifier
                                                                              Standard       voltage
            WIRING
            WIRING     Front   DIAGRAM
                                  View
                               DIAGRAM
                                                                     ~ REPAIR
                                                                                     (d) Reconnect
                                                                                     (c)
                                                                               REPLACE
                                                                          Tester Connection
                                                                                     Reconnect
                                                                                     REPAIR
                                                                                                              the heater
                                                                                               AIR CONDITIONING
                                                                                        OR REPLACE     the airHARNESS
                                                                                                   OR REPLACE
                                                                                                                             1
                                                                                                                     compressor
                                                                                                                     Condition
                                                                                                                     conditioning
                                                                                                                                   control
                                                                                                                                HARNESS
                                                                                                                                            and
                                                                                                                                       ORamplifier
                                                                                                                                                  pulleyswitch)
                                                                                                                                              (blower
                                                                                                                                       AMPLIFIER
                                                                                                                                                  Specified
                                                                                                                                                           connector.
                                                                                                                                                  OR CONNECTOR
                                                                                                                                                              Condition
                                                                                                                                                         connector.
                                                                                                                                                                           (e)
                                                                                                                                                                     connector.    ~
                                                                           ~I
                                     Result                              HTR - Body                                          Proceed    to
                                                                        HTR-5              CONNECTOR
                                                                                          ground                       Always                           11to14V
     H
                                      NG
                                                      E032993E05
                                                                          SYSTEM     ~    IS
                                                                                        REPAIROK       OR     REPLACE               HARNESS
                                                                                                                                    A                OR
                       Front View     Front   View                   ~ Reinstall the HTR relay.
                                                                    (d)                                                 HTR B
               I
              Blower from
                       Motor   theConnector                                                                CONNECTOR
I
               ®A
        OK (Checking               PROBLEM SYMPTOMS TABLE)
                                       FrontECMView                  GAUGE
                                                                    (e)    Measure the voltage.
     2       INSPECT           COMPRESSOR
                                                                                                                   ~I
                     OK (Checking       from the DTC)AND PULLEY                                                                     C
                      Air Conditioning        Amplifier Connector Standard voltage
           Tester Connection          To I G 1 Relay       •..  -----(r-....'O---------0--
                                                            Specified
                                                      E119774E01     (c)   Reinstall
                                                                        Condition
                                                                     E117010E05
                                                                     E120471 E01
                                                                                                     f
                                                                                                      ""'"""'Cu'ulf'---O-------,
                                                                                          the HTR relay.
I   GO TOCS-1
            CAN
     Component
                   COMMUNICATION
                - ES-7
                  Side:
                        (SOL+)                    SYSTEM
                               Compressor and Pulley
                                                                     (a)Tester
                                                                            Disconnect
                                                                     E120224E04
                                                                  Below    10
                                                                     REPLACE
                                                                                    Connection
                                                                                        HTR
                                                                                              the C8 compressor
                                                                                                 RELAY
                                                                                                                     Condition and pulleySpecified  connector.     (b)
                                                                                                                                                              Condition
                                                                                                                                          Air Conditioning Amplifier
               w/o  PTe
           CS-1 - Body groundHeater                            HeaterMeasure
                                                                         4Q-5
                                                                         Control
                                                               10 kO or higher   -    the
                                                                                   Body    resistance.
                                                                                         ground
                                                                                      (Blower    Switch)       Ignition  switch     ON                  11  to 14
                                                                                                                                                        V
                                                                          ~I
           HTR-5 DTCHTR-4            HTR-3
                                                                               Standard resistance
II I
                          No.                                       DTC Detection Condition                                                  Trouble Area
                          ~~ ALT
                       Front View
                Compressor         and Pulley                                REPLACE          MAIN BODY ECU
     REPLACE AIR CONDITIONING AMPLIFIER
     3   INSPECT      BLOWER
                           CHECK        MOTOR
                                                    ,-----oE
                                                                                    Tester Connection
                                                                                                                   ·
                                                                                                     LOO-------~----_r---D
                                                                                                                             Air conditioning
                                                                                                                                        SBLW
                                                                                                                             circuit 10.1
                                                                                                                                                amplifier
                                                                                                                                           Specified      power source
                                                                                                                                                      Condition
                                                                                                                                                         ~I
                   B1499/99
                          CHECK        HARNESS AND CONNECTOR                           (HEATER
                                                                Open in CAN communication         lineCONTROL (BLOWER                       SWITCH) • BLOWER
                                                                                                                             ECM
    ComponentWire
                              •.
                           RESISTOR)
                      Harness.L Battery
                                     Side:
                                                                     (a)             (a)
                                                                            Disconnect    Disconnect
                                                                                              the
                                                                     (c) Reconnect the compressor andE4         the
                                                                                                           blower  ·· E4    blower
                                                                                                                        motor            motor
                                                                                                                                     connector.
                                                                                                                             Combination
                                                                                                                              M pulley
                                                                                                                                             meter connector.
                                                                                                                                                    assembly
                                                                                                                                              connector.
                 Side:                                                               (b) Measure          the(+)  voltage.
                               -
                                                                     (b) Connect          the positive
                                                                                                                    ·  lead  CAN    communication
                                                                                                                                 from     the batteryline to terminal 2
I I  9 INSPECT BLOWER
                        •.....
                     Blower Motor
                        DTC Blower
                                     Result
                                       RESISTOR
                                      Motor
                                 (81499/99) is Connector
                                               output
                                                                     REPLACE   and the
                                                                               the blower
                                                                                            Standard(-)
                                                                                        COMPRESSOR
                                                                                            negative            voltage
                                                                                                                      AND
                                                                                                                     Blower
                                                                                                                   lead
                                                                                               motor operates smoothly.
                                                                                          Tester Connection
                                                                                                                            to   PULLEY
                                                                                                                                   Motor
                                                                                                                                   terminal
                                                                                                                             Proceed
                                                                                                                                    A
                                                                                                                                         to
                                                                                                                                       Condition
                                                                                                                                                1 , then check that
                                                                                                                                                                Specified Condition
                      DTC (81499/99) is not output                             OK: E4-1 (+B) - Body ground                          8
                                                                                                                                 Ignition switch ON                   11 to 14
               Tester Item                                  Specified(a)     Remove
                                                                        Condition The     the blower
                                                                                         blower      motor    resistor.
                                                                                                                  operates Combination
                                                                                                                                     smoothly. Meter Assembly         V
     Component wISide:
                   PTe Heater                                            Blower      Resistor
                                                                                Air Conditioning      Amplifier
                                                                     (b)
                                                                     (c)    Measure       the    resistance.
                                                                                                 current.
                       ===== :
              GAUGE fuse                                          Below 1 Q          (c) Reconnect the blower motor connector. ~ REPAIR
                         ---                          ---                      Standard resistance
                                                                                              current
                          c
                HTR  fuse
                   Blower Resistor 40-5                           Below    1  Q
      H                                    CAN Communication Line                    OR REPLACE HARNESS OR CONNECTOR
               Tester Connection                            E115015E10
                                                                 Specified ConditionTester Connection                                 Specified Condition
                          u
                                                          E120470E01
                        3-4                                              Below 10       E4-2 (+B) - E4-1 (GNO)                               1 to 3 A                         E120285E02
                                                                                                                                                                              E120908E01
                                                                                                                                                                              E115016E03
                                                                                                                                           ~
                        3-5                                         10 kO or higher
                                          Front View
                                          10 kO(d)   Reconnect the blower motor connector.
                                                 or higher
                   INSPECTION
                   INSPECTION PROCEDURE
                              PROCEDURE
                   INSPECTION PROCEDURE (c) Reinstall
                                                                           I~ I
                      3-4         (when battery voltage is applied to
                                                                  the blower resistor.
                                                                  terminalsREPLACE
                                                                           1 and 2)
                          II                                E120977E01
                                                                            BLOWER MOTOR
                                                                         Below 10
                       1                                        REPLACE         BLOWER RESISTOR
                       13-5 INSPECT FUSEOUTPUT
                                         (GAUGE,      HTR)                 E119793E04
                              CHECK OTC  (when      (OTC
                                               battery voltage81499/99)
                                                                  is applied to
                             READ VALUE OF INTELLIGENT  E119780E04 TESTER (REG CTRL CURRNT)
                                                terminals 1 and 2)
               Tester Connection                                 Specified Condition (a)
                                                                                 Remove the GAUGE fuse from the main body ECU.
                                                                            (a)
                                                                            (b)  Clear
                                                                                 Connect
                                                                                 Remove  thetheOTC.
                                                                                             the  intelligent
                                                                                                  HTR fuse tester   with
                                                                                                              from the    CAN VIM
                                                                                                                        engine   roomtorelay
                                                                                                                                           the DLC3.  (b)
                                                                                                                                               block. (c)
                 4F-7 - HTR-3                                Below 1 Q
                                                                            (1)
                                                                            Turn Connect
                                                                            Measure          an
                                                                                    the ignition intelligent tester with CAN     VIM   to the OLC3
                                                                                                   switch ON and turn the intelligent tester main
                                                                                         the resistance.
                4E-17 - HTR-4                                Below 1 Q
                                                                            switch    ON.with the
                                                                                   Standard         ignition switch turned OFF.
                                                                                                resistance
                       (c) Select the items below         in the DATA LIST,
                                                  E123400E02                (2) Turnandthe
                                                                                         readignition  switch
                                                                                                the value      ON andon
                                                                                                            displayed   turn
                                                                                                                           thethe  intelligent
                                                                                                                                intelligent    tester
                                                                                                                                             tester.
                                                                                         main switch ON.
               DATA LIST I AIR CONDITIONER
       Tester Connection              Condition                             (3) Clear the OTC by following the prompts on the tester
                                                                Specified Condition
        E1-9 (LO) - Body                                                                 screen.
                                 Ignition switch ON                   11to14V
            ground                                                                        HINT:
                                                                            (d) Reinstall the GAUGE fuse.
              Tester Connection                        Specified Condition (e) Reinstall  Refer to the intelligent tester operator's manual for
                                                                                              the HTR fuse.
                     4 -1                                   3.12 to 3.600                 further details.
                      4-3
                                                                            ~IREPLACEFUSE
                                                            1.45 to 1.670 (b) Read the OTC.
                        4-2                                            0.52 to 0.600
         Switch Position                Tester Connection                  Specified Condition
                   0                        ALL - 5 (E)                     10 kQ or higher
                   1                       9 (LO) - 5 (E)                       Below 1 Q
               1-2                    9 (LO) - 5 (E) -7 (M1)                    Below 1 Q
       2                  9 (LO) - 5 (E) -7 (M1)                 Below 1 Q
                           9(LO)-5(E)-7(M1)-6
 2-3                                                             Below 1 Q
                                   (M2)
       3                 9 (LO) - 5 (E) - 6 (M2)                 Below 1 Q
                         9 (LO) - 5 (E) - 6 (M2) -
 3-4                                                             Below 1 Q
                                 10 (HI)
       4                 9 (LO) - 5 (E) - 10 (HI)                Below 1 Q
 Tester Connection                                   Specified Condition
       E1-5 (E) - E3-1                                   Below 1 Q
   E1-6 (M2) - E3-2                                      Below 1 Q
   E1-7 (M1) - E3-3                                      Below 1 Q
  E1-10 (HI) - E3-4                                      Below 1 Q
Front View
E120283E02
.CD
 r-I   R-E-P-'A-IR-O-R-R-E-P-L-A-C-E-H-A-R-N-E-S-S-O-R-C-O-N-N-E-C-T-O-R-(-B-LO-W-E-R-R-E-S-IS-T-O-R-. B-O-DY-
 G-R-O-U-N-D-)----,