Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti G35 2003-2005 Coupe Sedan Approved Infiniti G35 Coupe 2003 lan

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lan


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LAN SYSTEM


K ELECTRICAL

                                                                                                                                                                   A




                                                                                  SECTION                     LAN    LAN SYSTEM
                                                                                                                                                                   B



                                                                                                                                                                   C


                                                                                                                                                                   D


                                                                                                                                                                   E
                                                                CONTENTS
                                  CAN                                            IPDM E/R Circuit Check ........................................ 26       .        F
                                                                                 CAN Communication Circuit Check ....................... 27               .
PRECAUTIONS ......................................................... 2
                                                                      .          IPDM E/R Ignition Relay Circuit Check ................. 29               .
 Precautions for Supplemental Restraint System                                   Component Inspection ........................................... 29      .        G
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                           ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
 SIONER" ................................................................. 2
                                                                      .            TION ................................................................... 29
                                                                                                                                                          .
 Precautions for Battery Service ............................... 2    .         CAN SYSTEM (TYPE 2) .......................................... 30         .
 Precautions For Trouble Diagnosis ......................... 2        .                                                                                            H
                                                                                 System Description ................................................ 30   .
   CAN SYSTEM ...................................................... 2.          Component Parts and Harness Connector Location 30                        ...
 Precautions For Harness Repair ............................. 2       .          Schematic .............................................................. 31
                                                                                                                                                          .
   CAN SYSTEM ...................................................... 2.          Wiring Diagram -- CAN -- .................................... 32         .         I
CAN COMMUNICATION ........................................... 4       .          Work Flow .............................................................. 35
                                                                                                                                                          .
 System Description ................................................. 4
                                                                      .            CHECK SHEET .................................................. 36      .
 CAN Communication Unit ....................................... 4     .            CHECK SHEET RESULTS (EXAMPLE) ............ 37                          .         J
   TYPE 1 ................................................................. 4
                                                                      .          Circuit Check Between TCM and Data Link Con-
   TYPE 2 ................................................................. 6
                                                                      .          nector ..................................................................... 47
                                                                                                                                                          .
CAN SYSTEM (TYPE 1) ............................................ 8    .          Circuit Check Between Data Link Connector and
 System Description ................................................. 8
                                                                      .                                                                                            LAN
                                                                                 VDC/TCS/ABS Control Unit ................................... 48          .
 Component Parts and Harness Connector Location 8                     .....      ECM Circuit Check ................................................ 48    .
 Schematic ............................................................... 9
                                                                      .          TCM Circuit Check ................................................ 49    .
 Wiring Diagram -- CAN -- .................................... 10     .          Combination Meter Circuit Check .......................... 49            .         L
 Work Flow ............................................................. 13
                                                                      .          BCM Circuit Check ................................................ 50    .
   CHECK SHEET .................................................. 14  .          Steering Angle Sensor Circuit Check .................... 50              .
   CHECK SHEET RESULTS (EXAMPLE) ............ 15                      .          VDC/TCS/ABS Control Unit Circuit Check ............ 51                   .        M
 Circuit Check Between Data Link Connector and                                   IPDM E/R Circuit Check ........................................ 51       .
 VDC/TCS/ABS Control Unit .................................. 23       .          CAN Communication Circuit Check ....................... 52               .
 ECM Circuit Check ................................................ 24.          IPDM E/R Ignition Relay Circuit Check ................. 54               .
 Combination Meter Circuit Check ......................... 24         .          Component Inspection ........................................... 54      .
 BCM Circuit Check ................................................ 25.            ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
 Steering Angle Sensor Circuit Check .................... 25          .            TION ................................................................... 54
                                                                                                                                                          .
 VDC/TCS/ABS Control Unit Circuit Check ............ 26               .




Revision; 2004 April                                                     LAN-1                                                         2003 G35 Coupe
                                              PRECAUTIONS
                                                                                                            [CAN]
PRECAUTIONS
[CAN]                                                               PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"                                                                                            AKS003EX


The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
q    To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
     in the event of a collision which would result in air bag inflation, all maintenance must be per-
     formed by an authorized NISSAN/INFINITI dealer.
q    Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
     sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
     Bag Module, see the SRS section.
q    Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
     Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
     harness connectors.
Precautions for Battery Service                                                                                 AKS005IS


Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Precautions For Trouble Diagnosis                                                                              AKS003EY

CAN SYSTEM
q   Do not apply voltage of 7.0V or higher to the measurement terminals.
q   Use the tester with its open terminal voltage being 7.0V or less.
q   Be sure to turn ignition switch off and disconnect negative battery terminal before checking the circuit.
Precautions For Harness Repair                                                                                 AKS003EZ

CAN SYSTEM
q   Solder the repaired parts, and wrap with tape. [Frays of twisted
    line must be within 110 mm (4.33 in)]




                                                                                                            PKIA0306E




Revision; 2004 April                                 LAN-2                                        2003 G35 Coupe
                                           PRECAUTIONS
                                                                             [CAN]
q   Do not perform bypass wire connections for the repair parts.
    (The spliced wire will become separated and the characteristics                      A
    of twisted line will be lost.)

                                                                                         B



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                                                                             PKIA0307E

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Revision; 2004 April                             LAN-3                2003 G35 Coupe
                                       CAN COMMUNICATION
                                                                                                            [CAN]
CAN COMMUNICATION                                                                                         PFP:23710

System Description                                                                                              AKS003F0


CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Unit                                                                                          AKS003F1


Go to CAN system, when selecting your CAN system type from the following table.
Body type                                                                    Coupe
Axle                                                                          2WD
Engine                                                                       VQ35DE
Transmission                                                  M/T                               A/T
Brake control                                                                 VDC
CAN system type                                                    1                              2
CAN system trouble diagnosis                                  LAN-8                          LAN-30


TYPE 1
System diagram




                                                                                                         SKIA6556E


Input/output signal chart
                                                                                            T: Transmit R: Receive
                                                                               Steering   VDC/TCS/
                                                      Combina-
                     Signals                ECM                        BCM       angle      ABS          IPDM E/R
                                                      tion meter
                                                                                sensor    control unit
 Engine speed signal                          T           R                                   R
 Engine coolant temperature signal            T           R
 Accelerator pedal position signal            T                                               R
 Fuel consumption monitor signal              T           R
 Air conditioner switch signal               R                          T
 A/C compressor request signal                T                                                               R
 A/C compressor feedback signal               T           R
 Blower fan motor switch signal              R                          T
 Cooling fan motor operation signal           T                                                               R


Revision; 2004 April                               LAN-4                                          2003 G35 Coupe
                                               CAN COMMUNICATION
                                                                                                       [CAN]
                                                                            Steering   VDC/TCS/
                                                         Combina-
                       Signals                    ECM                 BCM     angle      ABS          IPDM E/R   A
                                                         tion meter
                                                                             sensor    control unit
 Position lights request signal                              R         T                                 R
 Low beam request signal                                               T                                 R       B
 Low beam status signal                            R                   R                                 T
 High beam request signal                                    R         T                                 R
                                                                                                                 C
 High beam status signal                           R                   R                                 T
 Front fog lights request signal                                       T                                 R
                                                             R                             T                     D
 Vehicle speed signal
                                                   R         T         R
 Sleep request 1 signal                                      R         T
                                                                                                                 E
 Sleep request 2 signal                                                T                                 R
 Wake up request 1 signal                                    R         T
 Wake up request 2 signal                                    R         T                                         F
 Door switch signal (without navigation system)              R         T                                 R
 Door switch signal (with navigation system)                 T         R
 Turn indicator signal                                       R         T
                                                                                                                 G

 Seat belt buckle switch signal                              T         R
 Oil pressure switch signal                                  R                                           T       H
 Buzzer output signal                                        R         T
 Trunk switch signal                                         R         T
 Malfunction indicator lamp signal                 T         R                                                    I
 ASCD SET lamp signal                              T         R
 ASCD CRUISE lamp signal                           T         R
                                                                                                                  J
 Fuel level sensor signal                          R         T
 Front wiper request signal                                            T                                 R
 Front wiper stop position signal                                      R                                 T       LAN
 Rear window defogger switch signal                                    T                                 R
 Rear window defogger control signal               R                   R                                 T
                                                                                                                  L
 Hood switch signal                                                    R                                 T
 Theft warning horn request signal                                     T                                 R
 Horn chirp signal                                                     T                                 R       M
 Steering angle sensor signal                                                  T           R




Revision; 2004 April                                    LAN-5                                  2003 G35 Coupe
                                           CAN COMMUNICATION
                                                                                                      [CAN]
TYPE 2
System diagram




                                                                                                   SKIA6557E


Input/output signal chart
                                                                                     T: Transmit R: Receive
                                                                         Steering   VDC/TCS/
                                                      Combina-
              Signals                ECM      TCM                  BCM     angle       ABS          IPDM E/R
                                                      tion meter
                                                                          sensor    control unit
Engine speed signal                   T        R          R                              R
Engine coolant temperature signal     T        R          R
Accelerator pedal position signal     T        R                                         R
Closed throttle position signal       T        R
Wide open throttle position signal    T        R
Battery voltage signal                T        R
Stop lamp switch                               R          T
Fuel consumption monitor signal       T                   R
A/T self-diagnosis signal             R        T
A/T CHECK indicator lamp signal                T          R
A/T position indicator signal                  T          R                              R
ABS operation signal                           R                                         T
A/T shift schedule change demand
                                               R                                         T
signal
Air conditioner switch signal         R                             T
A/C compressor request signal         T                                                                  R
A/C compressor feedback signal        T                   R
Blower fan motor switch signal        R                             T
Cooling fan motor operation signal    T                                                                  R
Position lights request signal                            R         T                                    R
Low beam request signal                                             T                                    R
Low beam status signal                R                             R                                    T
High beam request signal                                  R         T                                    R
High beam status signal               R                             R                                    T
Front fog lights request signal                                     T                                    R




Revision; 2004 April                                LAN-6                                2003 G35 Coupe
                                           CAN COMMUNICATION
                                                                                                    [CAN]
                                                                         Steering   VDC/TCS/
                                                      Combina-
              Signals                ECM      TCM                  BCM     angle       ABS         IPDM E/R   A
                                                      tion meter
                                                                          sensor    control unit
                                                          R                              T
Vehicle speed signal
                                      R        R          T         R                                         B
Sleep request 1 signal                                    R         T
Sleep request 2 signal                                              T                                 R
                                                                                                              C
Wake up request 1 signal                                  R         T
Wake up request 2 signal                                  R         T
Door switch signal                                                                                            D
                                                          R         T                                 R
(without navigation system)
Door switch signal
                                                          T         R
(with navigation system)                                                                                      E
Turn indicator signal                                     R         T
Seat belt buckle switch signal                            T         R
Oil pressure switch signal                                R                                           T       F
Buzzer output signal                                      R         T
Trunk switch signal                                       R         T
                                                                                                              G
Malfunction indicator lamp signal     T                   R
ASCD SET lamp signal                  T                   R
ASCD CRUISE lamp signal               T                   R                                                   H
Fuel level sensor signal              R                   T
Output shaft revolution signal        R        T
                                                                                                               I
Turbine revolution signal             R        T
Front wiper request signal                                          T                                 R
Front wiper stop position signal                                    R                                 T        J
Rear window defogger switch signal                                  T                                 R
Rear window defogger control sig-
                                      R                             R                                 T       LAN
nal
Manual mode signal                             R          T
Not manual mode signal                         R          T
                                                                                                               L
Manual mode shift up signal                    R          T
Manual mode shift down signal                  R          T
Manual mode indicator signal                   T          R                                                   M
Hood switch signal                                                  R                                 T
Theft warning horn request signal                                   T                                 R
Horn chirp signal                                                   T                                 R
Steering angle sensor signal                                                T            R




Revision; 2004 April                                LAN-7                                2003 G35 Coupe
                                       CAN SYSTEM (TYPE 1)
                                                                                                         [CAN]
CAN SYSTEM (TYPE 1)                                                                                    PFP:23710

System Description                                                                                           AKS005NY


CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Component Parts and Harness Connector Location                                                               AKS005NZ




                                                                                                      SKIA4632E




Revision; 2004 April                               LAN-8                                       2003 G35 Coupe
                       CAN SYSTEM (TYPE 1)
                                                     [CAN]
Schematic                                               AKS005O0

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                                                  TKWT0572E




Revision; 2004 April         LAN-9           2003 G35 Coupe
                           CAN SYSTEM (TYPE 1)
                                                         [CAN]
Wiring Diagram -- CAN --                                    AKS005O1




                                                      TKWT0573E




Revision; 2004 April             LAN-10          2003 G35 Coupe
                       CAN SYSTEM (TYPE 1)
                                                     [CAN]

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                                                  TKWT0574E




Revision; 2004 April         LAN-11          2003 G35 Coupe
                       CAN SYSTEM (TYPE 1)
                                                     [CAN]




                                                  TKWT0575E




Revision; 2004 April         LAN-12          2003 G35 Coupe
                                     CAN SYSTEM (TYPE 1)
                                                                                                  [CAN]
Work Flow                                                                                             AKS00C53

                                                                                                                 A
1.   Print all the data of "SELF-DIAG RESULTS" for "ENGINE", "BCM" and "ABS" displayed on CONSULT-II.


                                                                                                                 B



                                                                                                                 C


                                                                                                                 D

                                                                                               PKIA8260E

2.   Print all the data of "CAN DIAG SUPPORT MNTR" for "ENGINE", "BCM" and "ABS" displayed on CON-
                                                                                                                 E
     SULT-II.


                                                                                                                 F


                                                                                                                 G


                                                                                                                 H

                                                                                               PKIA8343E

3.   Attach the printed sheet of "SELECT SYSTEM", "SELF-DIAG RESULTS" and "CAN DIAG SUPPORT
                                                                                                            I
     MNTR" onto the check sheet. Refer to LAN-14, "CHECK SHEET" .
4.   Based on the "CAN DIAG SUPPORT MNTR" results, put marks "v" onto the items with "NG" or "UNKWN"
     in the check sheet table. Refer to LAN-14, "CHECK SHEET" .
                                                                                                            J
     NOTE:
     q If "NG" is displayed on "INITIAL DIAG (Initial diagnosis)" as "CAN DIAG SUPPORT MNTR" for the diag-
        nosed control unit, replace the control unit.
                                                                                                           LAN
     q The "CAN DIAG SUPPORT MNTR" items, which are not in check sheet table, are not related to diag-
        nostic procedure on service manual.
        So it is not necessary to check the status of the "CAN DIAG SUPPORT MNTR" items not in check
        sheet table.                                                                                        L
5.   According to the check sheet results (example), start inspection. Refer to LAN-15, "CHECK SHEET
     RESULTS (EXAMPLE)" .
                                                                                                            M




Revision; 2004 April                           LAN-13                                   2003 G35 Coupe
                                    CAN SYSTEM (TYPE 1)
                                                                                                [CAN]
CHECK SHEET
NOTE:
If "NG" is displayed on "INITIAL DIAG (Initial diagnosis)" as "CAN DIAG SUPPORT MNTR" for the diagnosed
control unit, replace the control unit.




                                                                                             PKIB0384E


Revision; 2004 April                          LAN-14                                   2003 G35 Coupe
                                    CAN SYSTEM (TYPE 1)
                                                                                                [CAN]
CHECK SHEET RESULTS (EXAMPLE)
NOTE:                                                                                                     A
If "NG" is displayed on "INITIAL DIAG (Initial diagnosis)" as "CAN DIAG SUPPORT MNTR" for the diagnosed
control unit, replace the control unit.
Case1                                                                                                     B
Check harness between data link connector and VDC/TCS/ABS control unit. Refer to LAN-23, "Circuit Check
Between Data Link Connector and VDC/TCS/ABS Control Unit" .
                                                                                                          C


                                                                                                          D


                                                                                                          E



                                                                                             PKIB0385E
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                                                                                             SKIA7102E

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Revision; 2004 April                          LAN-15                                   2003 G35 Coupe
                                     CAN SYSTEM (TYPE 1)
                                                                    [CAN]
Case2
Check ECM circuit. Refer to LAN-24, "ECM Circuit Check" .




                                                                 PKIB0386E




                                                                 SKIA7103E




Revision; 2004 April                           LAN-16       2003 G35 Coupe
                                     CAN SYSTEM (TYPE 1)
                                                                                                [CAN]
Case3
Check combination meter circuit. Refer to LAN-24, "Combination Meter Circuit Check" .                    A


                                                                                                         B



                                                                                                         C


                                                                                                         D
                                                                                             PKIB0387E



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                                                                                             SKIA7104E    J


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Revision; 2004 April                            LAN-17                                  2003 G35 Coupe
                                     CAN SYSTEM (TYPE 1)
                                                                    [CAN]
Case4
Check BCM circuit. Refer to LAN-25, "BCM Circuit Check" .




                                                                 PKIB0388E




                                                                 SKIA7105E




Revision; 2004 April                           LAN-18       2003 G35 Coupe
                                      CAN SYSTEM (TYPE 1)
                                                                                                    [CAN]
Case5
Check steering angle sensor circuit. Refer to LAN-25, "Steering Angle Sensor Circuit Check" .                A


                                                                                                             B



                                                                                                             C


                                                                                                             D
                                                                                                 PKIB0389E



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                                                                                                 SKIA7106E    J


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Revision; 2004 April                             LAN-19                                     2003 G35 Coupe
                                     CAN SYSTEM (TYPE 1)
                                                                                                  [CAN]
Case6
Check VDC/TCS/ABS control unit circuit. Refer to LAN-26, "VDC/TCS/ABS Control Unit Circuit Check" .




                                                                                               PKIB0390E




                                                                                               SKIA7107E




Revision; 2004 April                           LAN-20                                   2003 G35 Coupe
                                     CAN SYSTEM (TYPE 1)
                                                                              [CAN]
Case7
Check IPDM E/R circuit. Refer to LAN-26, "IPDM E/R Circuit Check" .                    A


                                                                                       B



                                                                                       C


                                                                                       D
                                                                           PKIB0391E



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Revision; 2004 April                           LAN-21                 2003 G35 Coupe
                                       CAN SYSTEM (TYPE 1)
                                                                                                       [CAN]
Case8
Check CAN communication circuit. Refer to LAN-27, "CAN Communication Circuit Check" .




                                                                                                    PKIB0392E


Case9
Check IPDM E/R ignition relay circuit continuously sticks "OFF". Refer to LAN-29, "IPDM E/R Ignition Relay
Circuit Check" .




                                                                                                    PKIB0393E


Case10
Check IPDM E/R ignition relay circuit continuously sticks "ON". Refer to LAN-29, "IPDM E/R Ignition Relay Cir-
cuit Check" .




                                                                                                    PKIB0394E




Revision; 2004 April                             LAN-22                                      2003 G35 Coupe
                                    CAN SYSTEM (TYPE 1)
                                                                                              [CAN]
Circuit Check Between Data Link Connector and VDC/TCS/ABS Control Unit
                                                                                                  AKS005O4   A
1. CHECK CONNECTOR
1.  Turn ignition switch OFF.                                                                                B
2.  Disconnect the negative battery terminal.
3.  Check following terminals and connector for damage, bend and loose connection (meter-side, control
    module-side, sensor-side, control unit-side and harness-side).                                           C
q   Combination meter.
q   BCM.
q   Steering angle sensor.                                                                                   D
q   VDC/TCS/ABS control unit.
q   Between data link connector and VDC/TCS/ABS control unit.
OK or NG                                                                                                     E
  OK    >> GO TO 2.
  NG    >> Repair terminal or connector.
                                                                                                             F
2. CHECK HARNESS FOR OPEN CIRCUIT
1.   Disconnect harness connector M15.                                                                       G
2.   Check continuity between data link connector M8 terminals 6
     (L), 3 (R) and harness connector M15 terminals 58G (L), 59G
     (R).
                                                                                                             H
        6 (L) 



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