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hac


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VENTILATION, HEATER & AIR CONDITIONER

                                                                                                                                                                  A




 HEATER & AIR CONDITIONING CONTROL SYSTEM
                                                                                 SECTION                   HAC                                                    B



                                                                                                                                                                  C


                                                                                                                                                                  D


                                                                                                                                                                  E
                                                                 CONTENTS
         AUTOMATIC AIR CONDITIONER                                               WITHOUT LEFT AND RIGHT VENTILATION TEM-                                          F
                                                                                 PERATURE SEPARATELY CONTROL SYSTEM ....14
BASIC INSPECTION ................................... 5
                                                .                                 WITHOUT LEFT AND RIGHT VENTILATION
                                                                                  TEMPERATURE SEPARATELY CONTROL                                                  G
DIAGNOSIS AND REPAIR WORKFLOW ......... 5
                                  .                                               SYSTEM : Description ............................................14
                                                                                                                                                .
  Work Flow ................................................................ 5
                                                                      .           WITHOUT LEFT AND RIGHT VENTILATION
                                                                                  TEMPERATURE SEPARATELY CONTROL
INSPECTION AND ADJUSTMENT .................... 6
                                         .                                                                                                                        H
                                                                                  SYSTEM : Fail-Safe ...............................................14
                                                                                                                                                .
WITHOUT LEFT AND RIGHT VENTILATION TEM-                                           WITHOUT LEFT AND RIGHT VENTILATION
PERATURE SEPARATELY CONTROL SYSTEM ...... 6                                       TEMPERATURE SEPARATELY CONTROL
 WITHOUT LEFT AND RIGHT VENTILATION                                               SYSTEM : Component Part Location .....................15      .                 HAC
 TEMPERATURE SEPARATELY CONTROL                                                   WITHOUT LEFT AND RIGHT VENTILATION
 SYSTEM : Description & Inspection ......................... 6
                                                      .                           TEMPERATURE SEPARATELY CONTROL
 WITHOUT LEFT AND RIGHT VENTILATION                                               SYSTEM : Component's role ..................................17.                 J
 TEMPERATURE SEPARATELY CONTROL
                                                                                 WITH LEFT AND RIGHT VENTILATION TEMPER-
 SYSTEM : Temperature Setting Trimmer ................ 7
                                                      .
                                                                                 ATURE SEPARATELY CONTROL SYSTEM ..........18                            .
 WITHOUT LEFT AND RIGHT VENTILATION                                                                                                                               K
                                                                                  WITH LEFT AND RIGHT VENTILATION TEM-
 TEMPERATURE SEPARATELY CONTROL
                                                                                  PERATURE SEPARATELY CONTROL SYSTEM
 SYSTEM : Foot Position Setting Trimmer ................ 8
                                                      .
                                                                                  : Description ............................................................18
                                                                                                                                                         .
 WITHOUT LEFT AND RIGHT VENTILATION
                                                                                  WITH LEFT AND RIGHT VENTILATION TEM-                                            L
 TEMPERATURE SEPARATELY CONTROL
                                                                                  PERATURE SEPARATELY CONTROL SYSTEM
 SYSTEM : Inlet Port Memory Function .................... 9
                                                      .
                                                                                  : Fail-Safe ...............................................................19
                                                                                                                                                         .
WITH LEFT AND RIGHT VENTILATION TEMPER-                                           WITH LEFT AND RIGHT VENTILATION TEM-                                            M
ATURE SEPARATELY CONTROL SYSTEM ............ 9                .                   PERATURE SEPARATELY CONTROL SYSTEM
 WITH LEFT AND RIGHT VENTILATION TEM-                                             : Component Part Location .....................................19      .
 PERATURE SEPARATELY CONTROL SYSTEM                                               WITH LEFT AND RIGHT VENTILATION TEM-
                                                                                  PERATURE SEPARATELY CONTROL SYSTEM                                              N
 : Description & Inspection ........................................ 9
                                                              .
 WITH LEFT AND RIGHT VENTILATION TEM-                                             : Component's role .................................................21 .
 PERATURE SEPARATELY CONTROL SYSTEM
 : Temperature Setting Trimmer .............................. 11
                                                              .
                                                                                 AUTOMATIC AIR CONDITIONER SYSTEM .... 23                                         O
 WITH LEFT AND RIGHT VENTILATION TEM-                                            WITHOUT LEFT AND RIGHT VENTILATION TEM-
 PERATURE SEPARATELY CONTROL SYSTEM                                              PERATURE SEPARATELY CONTROL SYSTEM ....23
 : Foot Position Setting Trimmer .............................. 12
                                                              .                   WITHOUT LEFT AND RIGHT VENTILATION                                              P
 WITH LEFT AND RIGHT VENTILATION TEM-                                             TEMPERATURE SEPARATELY CONTROL
 PERATURE SEPARATELY CONTROL SYSTEM                                               SYSTEM : System Diagram ...................................23
                                                                                                                                         .
 : Inlet Port Memory Function .................................. 13
                                                              .                   WITHOUT LEFT AND RIGHT VENTILATION
                                                                                  TEMPERATURE SEPARATELY CONTROL
FUNCTION DIAGNOSIS ............................. 14
                                             .                                    SYSTEM : System Description ...............................23
                                                                                                                                         .
COMPRESSOR CONTROL FUNCTION ...........14
                                   .


Revision: 2007 June                                                       HAC-1                                                                 G37 Coupe
  WITHOUT LEFT AND RIGHT VENTILATION                                       WITH LEFT AND RIGHT VENTILATION TEMPER-
  TEMPERATURE SEPARATELY CONTROL                                           ATURE SEPARATELY CONTROL SYSTEM .......... 58                    .
  SYSTEM : Component Part Location .................... 28
                                                     .                      WITH LEFT AND RIGHT VENTILATION TEM-
  WITHOUT LEFT AND RIGHT VENTILATION                                        PERATURE SEPARATELY CONTROL SYSTEM
  TEMPERATURE SEPARATELY CONTROL                                            : System Diagram .................................................. 58
                                                                                                                                            .
  SYSTEM : Component Description ....................... 30
                                                     .                      WITH LEFT AND RIGHT VENTILATION TEM-
                                                                            PERATURE SEPARATELY CONTROL SYSTEM
WITH LEFT AND RIGHT VENTILATION TEMPER-                                     : System Description .............................................. 58
                                                                                                                                            .
ATURE SEPARATELY CONTROL SYSTEM .......... 31                    .
 WITH LEFT AND RIGHT VENTILATION TEM-                                      INTAKE DOOR CONTROL SYSTEM .............. 60
                                                                                                                 .
 PERATURE SEPARATELY CONTROL SYSTEM                                          System Diagram .................................................... 60
                                                                                                                                             .
 : System Diagram .................................................. 31
                                                                 .           System Description ................................................ 60
                                                                                                                                             .
 WITH LEFT AND RIGHT VENTILATION TEM-
 PERATURE SEPARATELY CONTROL SYSTEM                                        BLOWER MOTOR CONTROL SYSTEM ......... 62
                                                                                                             .
 : System Description .............................................. 32
                                                                 .
                                                                           WITHOUT LEFT AND RIGHT VENTILATION TEM-
 WITH LEFT AND RIGHT VENTILATION TEM-
                                                                           PERATURE SEPARATELY CONTROL SYSTEM ... 62
 PERATURE SEPARATELY CONTROL SYSTEM
                                                                            WITHOUT LEFT AND RIGHT VENTILATION
 : Component Part Location .................................... 37
                                                                 .
                                                                            TEMPERATURE SEPARATELY CONTROL
 WITH LEFT AND RIGHT VENTILATION TEM-
                                                                            SYSTEM : System Diagram ................................... 62
                                                                                                                                    .
 PERATURE SEPARATELY CONTROL SYSTEM
                                                                            WITHOUT LEFT AND RIGHT VENTILATION
 : Component Description ....................................... 39
                                                                 .
                                                                            TEMPERATURE SEPARATELY CONTROL
CAN COMMUNICATION SYSTEM .................. 41
                                        .                                   SYSTEM : System Description .............................. 62
                                                                                                                                    .
  System Description ................................................ 41
                                                                  .
                                                                           WITH LEFT AND RIGHT VENTILATION TEMPER-
DIAGNOSIS SYSTEM (AUTO AMP.) ............... 42
                                         .                                 ATURE SEPARATELY CONTROL SYSTEM .......... 63                    .
                                                                            WITH LEFT AND RIGHT VENTILATION TEM-
WITHOUT LEFT AND RIGHT VENTILATION TEM-                                     PERATURE SEPARATELY CONTROL SYSTEM
PERATURE SEPARATELY CONTROL SYSTEM ... 42                                   : System Diagram .................................................. 63
                                                                                                                                            .
 WITHOUT LEFT AND RIGHT VENTILATION                                         WITH LEFT AND RIGHT VENTILATION TEM-
 TEMPERATURE SEPARATELY CONTROL                                             PERATURE SEPARATELY CONTROL SYSTEM
 SYSTEM : Diagnosis Description .......................... 42
                                                       .                    : System Description .............................................. 63
                                                                                                                                            .
 WITHOUT LEFT AND RIGHT VENTILATION
 TEMPERATURE SEPARATELY CONTROL                                            MAGNET CLUTCH CONTROL SYSTEM ........ 65
                                                                                                             .
 SYSTEM : CONSULT-III Function ......................... 47
                                                       .                     System Diagram .................................................... 65
                                                                                                                                             .
                                                                             System Description ................................................ 65
                                                                                                                                             .
WITH LEFT AND RIGHT VENTILATION TEMPER-
ATURE SEPARATELY CONTROL SYSTEM .......... 48                   .          COMPONENT DIAGNOSIS ....................... 67
 WITH LEFT AND RIGHT VENTILATION TEM-
 PERATURE SEPARATELY CONTROL SYSTEM                                        MODE DOOR MOTOR ..................................... 67
                                                                                                                             .
 : Diagnosis Description .......................................... 48
                                                                .            Description ............................................................. 67
                                                                                                                                                   .
 WITH LEFT AND RIGHT VENTILATION TEM-                                        Component Function Check ................................. 67         .
 PERATURE SEPARATELY CONTROL SYSTEM                                          Diagnosis Procedure .............................................. 67 .
 : CONSULT-III Function ........................................ 53
                                                                .          AIR MIX DOOR MOTOR .................................. 70
                                                                                                                             .
MODE DOOR CONTROL SYSTEM ................. 55
                                       .                                   WITHOUT LEFT AND RIGHT VENTILATION TEM-
  System Diagram .................................................... 55
                                                                  .        PERATURE SEPARATELY CONTROL SYSTEM ... 70
  System Description ................................................ 55
                                                                  .         WITHOUT LEFT AND RIGHT VENTILATION
AIR MIX DOOR CONTROL SYSTEM .............. 57
                                       .                                    TEMPERATURE SEPARATELY CONTROL
                                                                            SYSTEM : Description ........................................... 70
                                                                                                                                         .
WITHOUT LEFT AND RIGHT VENTILATION TEM-                                     WITHOUT LEFT AND RIGHT VENTILATION
PERATURE SEPARATELY CONTROL SYSTEM ... 57                                   TEMPERATURE SEPARATELY CONTROL
 WITHOUT LEFT AND RIGHT VENTILATION                                         SYSTEM : Component Function Check ............... 70         .
 TEMPERATURE SEPARATELY CONTROL                                             WITHOUT LEFT AND RIGHT VENTILATION
 SYSTEM : System Diagram .................................. 57
                                                        .                   TEMPERATURE SEPARATELY CONTROL
 WITHOUT LEFT AND RIGHT VENTILATION                                         SYSTEM : Diagnosis Procedure ............................ 70 .
 TEMPERATURE SEPARATELY CONTROL
                                                                           WITH LEFT AND RIGHT VENTILATION TEMPER-
 SYSTEM : System Description .............................. 57
                                                        .
                                                                           ATURE SEPARATELY CONTROL SYSTEM .......... 71
                                                                                                                  .



Revision: 2007 June                                                 HAC-2                                                                 G37 Coupe
  WITH LEFT AND RIGHT VENTILATION TEM-                                             Diagnosis Procedure ..............................................92
                                                                                                                                                 .
  PERATURE SEPARATELY CONTROL SYSTEM                                               Component Inspection ............................................93
                                                                                                                                                 .                 A
  : Description ........................................................... 71
                                                                       .
  WITH LEFT AND RIGHT VENTILATION TEM-                                           SUNLOAD SENSOR ......................................... 94
  PERATURE SEPARATELY CONTROL SYSTEM                                               Description ..............................................................94
                                                                                                                                                         .
                                                                                   Component Function Check .................................94          .         B
  : Component Function Check ............................... 72        .
  WITH LEFT AND RIGHT VENTILATION TEM-                                             Diagnosis Procedure ..............................................94  .
  PERATURE SEPARATELY CONTROL SYSTEM                                               Component Inspection ............................................95   .
  : Diagnosis Procedure ............................................ 72.                                                                                           C
                                                                                 INTAKE SENSOR ............................................. 97
INTAKE DOOR MOTOR ...................................75
                                                 .                                 Description ..............................................................97
                                                                                                                                                         .
  Description ............................................................. 75
                                                                       .           Component Function Check .................................97          .
                                                                                                                                                                   D
  Component Function Check ................................. 75        .           Diagnosis Procedure ..............................................97  .
  Diagnosis Procedure .............................................. 75.           Component Inspection ............................................98   .

BLOWER MOTOR .............................................77
                                                      .                          POWER SUPPLY AND GROUND CIRCUIT                                                   E
                                                                                 FOR AUTO AMP. ............................................ 100
WITHOUT LEFT AND RIGHT VENTILATION TEM-                                            Description ............................................................ 100
                                                                                                                                                         .
PERATURE SEPARATELY CONTROL SYSTEM .... 77                                         Component Function Check ................................. 101        .         F
 WITHOUT LEFT AND RIGHT VENTILATION                                                Diagnosis Procedure ............................................ 101  .
 TEMPERATURE SEPARATELY CONTROL
 SYSTEM : Description ........................................... 77
                                                             .                   ECU DIAGNOSIS ...................................... 102
                                                                                                                                    .
 WITHOUT LEFT AND RIGHT VENTILATION                                                                                                                                G
 TEMPERATURE SEPARATELY CONTROL                                                  ECM ................................................................. 102
 SYSTEM : Component Function Check ............... 77        .                     Reference Value ................................................... 102
                                                                                                                                                    .
 WITHOUT LEFT AND RIGHT VENTILATION                                                                                                                                H
                                                                                 AUTO AMP. ..................................................... 119
 TEMPERATURE SEPARATELY CONTROL
                                                                                   Reference Value ................................................... 119.
 SYSTEM : Diagnosis Procedure ............................ 77.
                                                                                   Wiring Diagram - AIR CONDITIONER CONTROL
 WITHOUT LEFT AND RIGHT VENTILATION                                                                                                                                HAC
                                                                                   SYSTEM - ............................................................. 121
                                                                                                                                                          .
 TEMPERATURE SEPARATELY CONTROL
                                                                                   Fail-Safe ............................................................... 127
                                                                                                                                                          .
 SYSTEM : Component Inspection ......................... 80  .

WITH LEFT AND RIGHT VENTILATION TEMPER-                                          SYMPTOM DIAGNOSIS ........................... 129
                                                                                                                             .                                     J
ATURE SEPARATELY CONTROL SYSTEM .......... 80                         .          AIR CONDITIONER CONTROL ...................... 129
 WITH LEFT AND RIGHT VENTILATION TEM-
                                                                                   Diagnosis Chart By Symptom ............................... 129
                                                                                                                                           .
 PERATURE SEPARATELY CONTROL SYSTEM                                                                                                                                K
 : Description ........................................................... 80
                                                                      .          INSUFFICIENT COOLING .............................. 130
 WITH LEFT AND RIGHT VENTILATION TEM-                                              Description ............................................................ 130
                                                                                                                                                         .
 PERATURE SEPARATELY CONTROL SYSTEM                                                Inspection procedure ............................................ 130 .
                                                                                                                                                                   L
 : Component Function Check ............................... 81        .
 WITH LEFT AND RIGHT VENTILATION TEM-                                            INSUFFICIENT HEATING ............................... 133
 PERATURE SEPARATELY CONTROL SYSTEM                                                Description ............................................................ 133
                                                                                                                                                         .
 : Diagnosis Procedure ............................................ 81.            Inspection procedure ............................................ 133 .         M
 WITH LEFT AND RIGHT VENTILATION TEM-
 PERATURE SEPARATELY CONTROL SYSTEM                                              NOISE .............................................................. 135
 : Component Inspection ......................................... 83  .            Description ............................................................ 135
                                                                                                                                                         .
                                                                                                                                                                   N
                                                                                   Inspection procedure ............................................ 135 .
MAGNET CLUTCH ............................................85
                                                      .
  Description ............................................................. 85
                                                                       .         SELF-DIAGNOSIS CANNOT BE PER-
  Component Function Check ................................... 85      .         FORMED ......................................................... 137              O
  Diagnosis Procedure .............................................. 85.           Description ............................................................ 137
                                                                                                                                                         .
                                                                                   Inspection procedure ............................................ 137 .
AMBIENT SENSOR ..........................................88
                                                     .                                                                                                             P
  Description ............................................................. 88
                                                                       .         MEMORY FUNCTION DOES NOT OPERATE. 138
  Component Function Check ................................. 88        .           Description ............................................................ 138
                                                                                                                                                         .
  Diagnosis Procedure .............................................. 88.           Inspection procedure ............................................ 138 .
  Component Inspection ........................................... 89  .
                                                                                 PRECAUTION ........................................... 139
                                                                                                                                      .
IN-VEHICLE SENSOR ......................................91
                                                    .
  Description ............................................................. 91
                                                                       .
                                                                                 PRECAUTIONS ............................................... 139
  Component Function Check ................................. 91        .

Revision: 2007 June                                                       HAC-3                                                                 G37 Coupe
  Precaution for Supplemental Restraint System                                   General Refrigerant Precaution ........................... 141  .
  (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                        Refrigerant Connection ........................................ 141
                                                                                                                                                 .
  SIONER" ...............................................................139
                                                                       .         Service Equipment ............................................... 145
                                                                                                                                                 .
  Precaution Necessary for Steering Wheel Rota-
  tion after Battery Disconnect ................................139    .       COMPRESSOR ............................................... 148
                                                                                                                                       .
  Precaution for Battery Service ..............................139     .         General Precautions ............................................ 148
                                                                                                                                                .
  Precaution for Procedure without Cowl Top Cover 140                  ..
                                                                               LEAK DETECTION DYE ................................. 149
                                                                                                                                 .
  Precautions For Xenon Headlamp Service ..........140                 .
                                                                                 General Precautions ............................................ 149
                                                                                                                                                .
  Working with HFC-134a (R-134a) ........................140           .




Revision: 2007 June                                                     HAC-4                                                           G37 Coupe
                            DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >                                                 [AUTOMATIC AIR CONDITIONER]

BASIC INSPECTION                                                                                                        A
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow                                                                                     INFOID:0000000001713761
                                                                                                                        B

DETAILED FLOW
1.LISTEN TO CUSTOMER COMPLAINT                                                                                          C
Listen to customer complaint. (Get detailed information about the conditions and environment when the symp-
tom occurs.)
                                                                                                                        D
         >> GO TO 2.
2.VERIFY THE SYMPTOM WITH OPERATIONAL CHECK                                                                             E
Verify the symptom with operational check. Refer to HAC-6, "WITHOUT LEFT AND RIGHT VENTILATION
TEMPERATURE SEPARATELY CONTROL SYSTEM : Description & Inspection" (Without left and right venti-
lation temperature separately control system) or HAC-9, "WITH LEFT AND RIGHT VENTILATION TEMPERA-                       F
TURE SEPARATELY CONTROL SYSTEM : Description & Inspection" (With left and right ventilation
temperature separately control system).
                                                                                                                        G
         >> GO TO 3.
3.GO TO APPROPRIATE TROUBLE DIAGNOSIS
                                                                                                                        H
Go to appropriate trouble diagnosis (Refer to HAC-129, "Diagnosis Chart By Symptom" below).

         >> GO TO 4.
                                                                                                                        HAC
4.REPAIR OR REPLACE
Repair or replace the specific parts.
                                                                                                                        J
         >> GO TO 5.
5.FINAL CHECK                                                                                                           K
Final check.
Is the inspection result normal?
  YES >> CHECK OUT                                                                                                      L
  NO      >> GO TO 3.

                                                                                                                        M



                                                                                                                        N



                                                                                                                        O



                                                                                                                        P




Revision: 2007 June                              HAC-5                                             G37 Coupe
                                INSPECTION AND ADJUSTMENT
< BASIC INSPECTION >                                                   [AUTOMATIC AIR CONDITIONER]
INSPECTION AND ADJUSTMENT
WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY
CONTROL SYSTEM
WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CON-
TROL SYSTEM : Description & Inspection                                                             INFOID:0000000001675663




DESCRIPTION
The purpose of the operational check is to check that the individual system operates normally.

         Conditions        : Engine running at normal operating temperature

INSPECTION PROCEDURE
Memory Function
1. Turn temperature control dial clockwise until 32



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