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SUSPENSION

                                                                                                                                                                      A




                                                                                                  SECTION
                                                                                      ROAD WHEELS & TIRES
                                                                                                                              WT                                      B



                                                                                                                                                                      C


                                                                                                                                                                      D


                                                                                                                                                                      WT
                                                                    CONTENTS
BASIC INSPECTION ................................... 3
                                                .                                      DTC Logic ...............................................................15
                                                                                                                                                            .         F
                                                                                       Diagnosis Procedure ..............................................15 .
DIAGNOSIS AND REPAIR WORKFLOW ......... 3
                                  .
  Repair Work Flow ..................................................... 3
                                                                  .                  C1708, C1709, C1710, C1711 TRANSMITTER
                                                                                                                                                                      G
                                                                                     (NO DATA) ........................................................ 17
INSPECTION AND ADJUSTMENT .................... 5
                                         .                                             Description ..............................................................17
                                                                                                                                                             .
                                                                                       DTC Logic ...............................................................17
                                                                                                                                                             .
TRANSMITTER WAKE UP OPERATION .................. 5                       .                                                                                            H
                                                                                       Diagnosis Procedure ..............................................17  .
 TRANSMITTER WAKE UP OPERATION : De-
                                                                                       Special Repair Requirement ...................................18      .
 scription .................................................................... 5
                                                                         .
 TRANSMITTER WAKE UP OPERATION : Spe-                                                C1712, C1713, C1714, C1715 TRANSMITTER                                           I
 cial Repair Requirement ........................................... 5   .           (CHECKSUM) .................................................... 20
ID REGISTRATION PROCEDURE ............................. 5          .                   Description ..............................................................20
                                                                                                                                                             .
  ID REGISTRATION PROCEDURE : Description ...... 5                                     DTC Logic ...............................................................20
                                                                                                                                                             .
                                                                                                                                                                      J
  ID REGISTRATION PROCEDURE : Special Re-                                              Diagnosis Procedure ..............................................20  .
  pair Requirement ...................................................... 5
                                                                   .                   Special Repair Requirement ...................................22      .

FUNCTION DIAGNOSIS .............................. 7
                                             .                                       C1716, C1717, C1718, C1719 TRANSMITTER                                           K
                                                                                     (PRESSDATA) .................................................. 23
TPMS .................................................................. 7
                                                                  .                    Description ..............................................................23
                                                                                                                                                             .
  System Diagram ....................................................... 7
                                                                  .                    DTC Logic ...............................................................23
                                                                                                                                                             .        L
  System Description .................................................. 7
                                                                  .                    Diagnosis Procedure ..............................................23  .
  Component Parts Location ....................................... 9
                                                                  .                    Component Inspection ............................................24   .
  Component Description ............................................ 9
                                                                  .                    Special Repair Requirement ...................................24      .
                                                                                                                                                                      M
DIAGNOSIS SYSTEM (BCM) ...........................10
                                              .                                      C1720, C1721, C1722, C1723 TRANSMITTER
                                                                                     (CODE) .............................................................. 25
COMMON ITEM ........................................................ 10
                                                                .                      Description ..............................................................25
                                                                                                                                                             .        N
 COMMON ITEM : CONSULT-III Function (BCM -                                             DTC Logic ...............................................................25
                                                                                                                                                             .
 COMMON ITEM) .................................................... 10
                                                                .                      Diagnosis Procedure ..............................................25  .
AIR PRESSURE MONITOR ..................................... 11              .           Special Repair Requirement ...................................27      .        O
 AIR PRESSURE MONITOR : Diagnosis Descrip-                                           C1724, C1725, C1726, C1727 TRANSMITTER
 tion ......................................................................... 11
                                                                           .
                                                                                     (BATT VOLT) .................................................... 28
 AIR PRESSURE MONITOR : CONSULT-III Func-                                                                                                                             P
                                                                                       Description ..............................................................28
                                                                                                                                                             .
 tion (BCM - AIR PRESSURE MONITOR) .............. 13                       .
                                                                                       DTC Logic ...............................................................28
                                                                                                                                                             .
COMPONENT DIAGNOSIS ........................ 15
                                         .                                             Diagnosis Procedure ..............................................28  .
                                                                                       Special Repair Requirement ...................................30      .
C1704, C1705, C1706, C1707 LOW TIRE
PRESSURE .......................................................15
                                                            .                        C1729 VEHICLE SPEED SIG ERR ................... 31
                                                                                       Description ..............................................................31
                                                                                                                                                             .
  Description ............................................................. 15
                                                                       .


Revision: 2007 June                                                            WT-1                                                                 G37 Coupe
  DTC Logic .............................................................. 31
                                                                       .            Description ............................................................. 82
                                                                                                                                                          .
  Diagnosis Procedure ............................................. 31 .            Diagnosis Procedure .............................................. 82 .
  Special Repair Requirement .................................. 31     .
                                                                                  LOW TIRE PRESSURE WARNING LAMP
C1734 CONTROL UNIT .................................... 32
                                                    .                             BLINKS ............................................................. 84
                                                                                                                                                   .
  Description ............................................................. 32
                                                                        .           Description ............................................................. 84
                                                                                                                                                          .
  DTC Logic .............................................................. 32
                                                                        .           Diagnosis Procedure .............................................. 84 .
  Diagnosis Procedure ............................................. 32  .
  Special Repair Requirement .................................. 33      .         TURN SIGNAL LAMP BLINKS ........................ 86
                                                                                                                               .
                                                                                    Description ............................................................. 86
                                                                                                                                                          .
POWER SUPPLY AND GROUND CIRCUIT .... 34
                                 .                                                  Diagnosis Procedure .............................................. 86 .
BCM (BODY CONTROL MODULE) ........................ 34                 .           ID REGISTRATION CANNOT BE COMPLET-
 BCM (BODY CONTROL MODULE) : Diagnosis                                            ED ..................................................................... 87
                                                                                                                                                       .
 Procedure .............................................................. 34
                                                                      .             Description ............................................................. 87
                                                                                                                                                          .
 BCM (BODY CONTROL MODULE) : Special Re-                                            Diagnosis Procedure ............................................. 87  .
 pair Requirement ................................................... 34
                                                                      .
                                                                                  NORMAL OPERATING CONDITION ............... 88
                                                                                                                         .
UNIFIED METER AND A/C AMP. ............................ 34               .          Description ............................................................. 88
                                                                                                                                                          .
 UNIFIED METER AND A/C AMP. : Description .... 34                        .
 UNIFIED METER AND A/C AMP. : Diagnosis Pro-                                      NOISE, VIBRATION AND HARSHNESS
 cedure .................................................................... 35
                                                                         .        (NVH) TROUBLESHOOTING ........................... 89
                                                                                                                                .
                                                                                    NVH Troubleshooting Chart ................................... 89
                                                                                                                                              .
TPMS ................................................................ 37
                                                                  .
  Description ............................................................. 37
                                                                        .         PRECAUTION ............................................ 90
  Wiring Diagram - TIRE PRESSURE MONITOR-
  ING SYSTEM - ...................................................... 38.         PRECAUTIONS ................................................ 90
                                                                                                                                           .
                                                                                    Service Notice or Precautions ................................ 90
                                                                                                                                               .
TIRE PRESSURE RECEIVER .......................... 42
                                              .
  Description ............................................................. 42
                                                                        .         PREPARATION .......................................... 91
  Diagnosis Procedure ............................................. 42  .
                                                                                  PREPARATION ................................................ 91
                                                                                                                                           .
TIRE PRESSURE WARNING CHECK                                                         Special Service Tools ............................................ 91
                                                                                                                                                   .
SWITCH ............................................................ 44
                                                                .                   Commercial Service Tools ..................................... 91
                                                                                                                                                   .
  Description ............................................................. 44
                                                                        .
  Diagnosis Procedure ............................................. 44  .         ON-VEHICLE MAINTENANCE .................. 92

ECU DIAGNOSIS ....................................... 45
                                                  .                               ROAD WHEEL .................................................. 92
                                                                                                                                            .
                                                                                    Inspection ............................................................... 92
                                                                                                                                                           .
BCM (BODY CONTROL MODULE) ................. 45
                                        .
  Reference Value .................................................... 45.        ON-VEHICLE REPAIR ............................... 93
  Wiring Diagram - BCM - ........................................ 68     .
  Fail Safe ................................................................ 73
                                                                         .
                                                                                  ROAD WHEEL TIRE ASSEMBLY ................... 93
                                                                                                                           .
                                                                                    Adjustment ............................................................. 93
                                                                                                                                                         .
  DTC Inspection Priority Chart ............................. 75         .
  DTC Index ............................................................. 77
                                                                         .        REMOVAL AND INSTALLATION .............. 96
SYMPTOM DIAGNOSIS ............................ 79
                                           .                                      TRANSMITTER ................................................ 96
                                                                                                                                           .
TPMS ................................................................ 79
                                                                  .                 Exploded View ....................................................... 96
                                                                                                                                                      .
                                                                                    Removal and Installation ........................................ 96
                                                                                                                                                      .
  Symptom Table ..................................................... 79
                                                                  .

LOW TIRE PRESSURE WARNING LAMP                                                    SERVICE DATA AND SPECIFICATIONS
DOES NOT TURN ON ...................................... 81
                                                    .                             (SDS) .......................................................... 98
  Description ............................................................. 81
                                                                        .
                                                                                  SERVICE DATA AND SPECIFICATIONS
  Diagnosis Procedure ............................................. 81  .
                                                                                  (SDS) ................................................................ 98
                                                                                                                                                     .
LOW TIRE PRESSURE WARNING LAMP                                                      Road Wheel ........................................................... 98  .
STAYS ON ........................................................ 82
                                                              .                     Tire ......................................................................... 98
                                                                                                                                                               .




Revision: 2007 June                                                         WT-2                                                                     G37 Coupe
                            DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
BASIC INSPECTION                                                                                                        A
DIAGNOSIS AND REPAIR WORKFLOW
Repair Work Flow                                                                              INFOID:0000000001686943
                                                                                                                        B

DETAILED FLOW
                                                                                                                        C
1.VERIFY COSTOMER COMPLAINTS
Interview the customer to obtain detailed information about the symptom.
                                                                                                                        D
         >> GO TO 2.
2.DETERMINE REFERENCE ITEM RELATED TO SYMPTOM                                                                           WT
Check the symptom on the vehicle from the information obtained.
(cruise test, warning lamp illumination or blinking, etc.)
Is the symptom confirmed?                                                                                               F
  YES >> GO TO 3.
  NO      >> GO TO 4.
3.PRELIMINARY INSPECTION                                                                                                G

1. Perform basic inspection.
2. Check all tire pressures. Refer to WT-98, "Tire".
                                                                                                                        H
3. Check the low tire pressure warning lamp for illumination or blinking. Refer to WT-79, "Symptom Table".
Is the malfunction corrected?
  YES >> INSPECTION END
                                                                                                                        I
  NO     >> GO TO 4.
4.PERFORM SELF-DIAGNOSIS
1. Perform self-diagnosis. Record any DTCs and data displayed on CONSULT-III.                                           J
2. Perform inspection according to the displayed DTC. Refer to WT-77, "DTC Index".
Is the causal factor identified from DTC?
  YES >> GO TO 6.                                                                                                       K
  NO     >> GO TO 5.
5.CHECK SYMPTOM
                                                                                                                        L
Perform troubleshooting by symptom. Refer to WT-79, "Symptom Table".
Is the causal factor identified?
  YES >> GO TO 6.                                                                                                       M
  NO     >> GO TO 4.
6.REPAIR OR REPLACE MULFUNCTIONING PARTS
Repair or replace the applicable part.                                                                                  N


         >> GO TO 7.
                                                                                                                        O
7.CHECK SELF-DIAGNOSIS RESULT
1. Erase DTCs. Refer to WT-11, "AIR PRESSURE MONITOR : Diagnosis Description".
2. Perform self-diagnosis again.                                                                                        P
Is any DTC displayed?
  YES >> GO TO 4.
  NO    >> GO TO 8.
8.FINAL CHECK
1.   Perform a cruise test.
2.   Check the warning lamp for illumination or blinking.

Revision: 2007 June                                 WT-3                                           G37 Coupe
                         DIAGNOSIS AND REPAIR WORKFLOW
< BASIC INSPECTION >
Is the malfunction corrected?
  YES >> INSPECTION END
  NO     >> GO TO 4.




Revision: 2007 June                  WT-4                G37 Coupe
                                INSPECTION AND ADJUSTMENT
< BASIC INSPECTION >
INSPECTION AND ADJUSTMENT
                                                                                                                            A
TRANSMITTER WAKE UP OPERATION
TRANSMITTER WAKE UP OPERATION : Description                                                       INFOID:0000000001686944
                                                                                                                            B
This procedure must be done after replacement of a transmitter, BCM, or rotating wheels.
TRANSMITTER WAKE UP OPERATION : Special Repair Requirement                                        INFOID:0000000001686945
                                                                                                                            C
1.TRANSMITTER WAKE UP OPERATION
1.   With the activation tool (J-45295) pushed against the front-left                                                       D
     transmitter, press and hold the button 5 seconds.


                                                                                                                            WT



                                                                                                                            F


                                                                                                            SEIA0460E
                                                                                                                            G

2.   When ignition switch ON, as the low tire pressure warning lamp blinks per the follow diagram, the respec-
     tive transmitter then must be woken up.                                                                                H



                                                                                                                            I


                                                                                                                            J



                                                                                                                            K


                                                                                                                            L

                                                                                                SEIA0762E

3.   Register the ID of wheel that low tire pressure warning lamp blinks. When wake up of registered wheel
     has been completed, turn signal lamp blinks two times.                                                                 M


4.   After completing wake up all transmitters, check that the low tire pressure warning lamp goes out.
                                                                                                                            N

         >> Perform ID registration procedure. Refer to WT-5, "ID REGISTRATION PROCEDURE : Special
            Repair Requirement".
                                                                                                                            O
ID REGISTRATION PROCEDURE
ID REGISTRATION PROCEDURE : Description                                                           INFOID:0000000001686946

                                                                                                                            P
This procedure must be done after replacing or rotating wheels, replacing transmitter or BCM.
ID REGISTRATION PROCEDURE : Special Repair Requirement                                            INFOID:0000000001686947



1.ID REGISTRATION PREPARATION
1. Touch "WORK SUPPORT" on "SELECT DIAG MODE" screen, and select "ID REGIST".
Is the transmitter activation tool used for ID registration?

Revision: 2007 June                                 WT-5                                               G37 Coupe
                                        INSPECTION AND ADJUSTMENT
< BASIC INSPECTION >
 YES >> GO TO 2.
 NO    >> GO TO 3.
2.ID REGISTRATION (WITH TRANSMITTER ACTIVATION TOOL)
1.   With the transmitter activation tool (J-45295) pushed against the front-left transmitter position of the air
     valve, press and hold the button for 5 seconds.
2.   Register the IDs in order from FR LH, FR RH, RR RH, to RR LH.
     When ID registration of each wheel has been completed, turn signal lamp blinks.

           Activation tire position                Turn signal lamp                          CONSULT-III
     1                 Front LH
     2                 Front RH                                                                   "Red"
                                                     2 times blinks                                 
     3                 Rear RH                                                                   "Green"
     4                 Rear LH
3. After completing all ID registrations, press "END" to complete the procedure.
   NOTE:
   Be sure to register the IDs in order from FR LH, FR RH, RR RH, to RR LH, or the self-diagnostic results
   display will not function properly.
Can ID registration of all transmitters be completed?
 YES >> ID registration END
 NO     >> Inspect the tire pressure monitoring system. Refer to WT-17, "Diagnosis Procedure".
3.ID REGISTRATION (WITHOUT TRANSMITTER ACTIVATION TOOL)
1.   Adjust the tire pressure to the values shown in the table below for ID registration, and drive the vehicle at
     40 km/h (25 MPH) or more for several minutes.
     NOTE:
     If ID registration is unable, buzzer beeps.

                           Tire position                                Tire pressure kPa (kg/cm2, psi)
                             Front LH                                            240 (2.4, 34)
                             Front RH                                            220 (2.2, 31)
                             Rear RH                                             200 (2.0, 29)
                             Rear LH                                             180 (1.8, 26)
2.   After completing all ID registrations, press "END" to complete procedure.

                      Activation tire position                                   CONSULT-III
                             Front LH
                             Front RH                                               "Red"
                                                                                      
                             Rear RH                                               "Green"
                             Rear LH
3. Inflate all tires to proper pressure. Refer to WT-98, "Tire".
Can ID registration of all transmitters be completed?
 YES >> ID registration END
 NO      >> Inspect the tire pressure monitoring system. Refer to WT-17, "Diagnosis Procedure".




Revision: 2007 June                                  WT-6                                                  G37 Coupe
                                                   TPMS
< FUNCTION DIAGNOSIS >
FUNCTION DIAGNOSIS                                                                                                      A
TPMS
System Diagram                                                                                INFOID:0000000001686948
                                                                                                                        B



                                                                                                                        C


                                                                                                                        D


                                                                                                                        WT
                                                                                            JPEIC0007GB



System Description                                                                            INFOID:0000000001686949   F

DISCRIPTION
During driving, the TPMS (Tire Pressure Monitoring System) receives the signal transmitted from transmitter             G
installed in each wheel, when the tire pressure becomes low. The BCM (Body Control Module) of this system
has pressure judgment and trouble diagnosis functions. When the tire pressure monitoring system detects low
inflation pressure or another unusual symptom, the low tire pressure warning lamps in the combination meter
comes on.                                                                                                               H

TRANSMITTER
A sensor-transmitter (1) integrated with a valve is installed on a                                                      I
wheel (2), and transmits a detected air pressure signal by radio
wave.

            : Outside                                                                                                   J



                                                                                                                        K


                                                                                                          JPEIC0013ZZ   L
TIRE PRESSURE RECEIVER
The tire pressure receiver (1) receives the air pressure signal trans-
mitted by the transmitter in each wheel.                                                                                M



                                                                                                                        N



                                                                                                                        O

                                                                                                          JPEIC0001ZZ

                                                                                                                        P
BCM (BODY CONTROL MODULE)




Revision: 2007 June                                 WT-7                                           G37 Coupe
                                                              TPMS
< FUNCTION DIAGNOSIS >
The BCM (1) reads the air pressure signal received by the tire pres-
sure receiver, and controls the low tire pressure warning lamp and
the buzzer operations. It also has a judgment function to detect a
system malfunction.




                                                                                                                   JPEIC0002ZZ


LOW TIRE PRESSURE WARNING LAMP
The unified meter and A/C amp receives tire pressure status from
the BCM using CAN communication. When BCM judges from a
transmitter signal that tire pressure is insufficient, BCM transmits a
signal to unified meter and A/C amp through CAN communication.
unified meter and A/C amp turns on the low tire pressure warning
lamp mounted on the Combination meter.




                                                                                                                   SEIA0434E


Low tire pressure warning lamp indication
                                   Condition                                      Low tire pressure warning lamp

 Less than 182.7 kPa (1.9 kg/cm2, 26 psi) [NOTE1]
                                                                                               ON
 Less than 189.6 kPa (1.9 kg/cm2, 27 psi) [NOTE2]
 Low tire pressure warning system malfunction [Other diagnostic item]        Warning lamp blinks 1 min, then turns ON.

NOTE1: Standard air pressure is for 230 kPa (2.3 kg/cm2, 33 psi) vehicles.
NOTE2: Standard air pressure is for 240 kPa (2.4 kg/cm2, 35 psi) vehicles.

TIRE PRESSURE WARNING CHECK SWITCH
The following item can be checked by grounding the tire pressure
warning check switch (1) harness connector terminal.



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