Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti FX45 FX35 2003-2005 Approved FX45_35-S50-2003 pg

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POWER SUPPLY, GROUND & CIRCUIT ELEMENTS


K ELECTRICAL

                                                                                                                                                                  A




   POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
                                                                                                   SECTION                   PG                                   B



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                                                                   CONTENTS
POWER SUPPLY ROUTING CIRCUIT ..................... 3                      .         Inspection With CONSULT-II (Self-Diagnosis) ...... 44                .        F
  Schematic ............................................................... 3
                                                                          .         Removal and Installation of IPDM E/R .................. 45           .
  Wiring Diagram - POWER - .................................... 4         .           REMOVAL .......................................................... 45
                                                                                                                                                         .
    BATTERY POWER SUPPLY - IGNITION SW. IN                                            INSTALLATION .................................................. 45 .        G
    ANY POSITION .................................................... 4   .        GROUND .................................................................. 46
                                                                                                                                                         .
    ACCESSORY POWER SUPPLY - IGNITION SW.                                           Ground Distribution ................................................ 46
                                                                                                                                                         .
    IN "ACC" OR "ON" ............................................. 10     .           MAIN HARNESS ................................................ 46   .
                                                                                                                                                                  H
    IGNITION POWER SUPPLY - IGNITION SW. IN                                           ENGINE ROOM HARNESS ............................... 49             .
    "ON" AND/OR "START" ...................................... 12         .           ENGINE HARNESS/VK ENGINE MODELS ....... 52                         .
  Fuse ...................................................................... 17
                                                                          .           ENGINE HARNESS/VQ ENGINE MODELS ...... 53                          .
  Fusible Link ........................................................... 17
                                                                          .           ENGINE CONTROL HARNESS/VK ENGINE                                             I
  Circuit Breaker ...................................................... 17
                                                                          .           MODELS ............................................................ 54
                                                                                                                                                         .
IPDM E/R (INTELLIGENT POWER DISTRIBUTION                                              ENGINE CONTROL HARNESS/VQ ENGINE
MODULE ENGINE ROOM) ..................................... 18              .           MODELS ............................................................ 55
                                                                                                                                                         .        J
  System Description ............................................... 18   .           BODY HARNESS ............................................... 56    .
    SYSTEMS CONTROLLED BY IPDM E/R .......... 18                          .           BODY NO.2 HARNESS ..................................... 59         .
    CAN COMMUNICATION LINE CONTROL ........ 18                            .           ROOM LAMP HARNESS ................................... 60           .
                                                                                                                                                                  PG
    IPDM E/R STATUS CONTROL .......................... 19                 .        HARNESS ................................................................ 61
                                                                                                                                                         .
  CAN Communication System Description ............. 20                   .         Harness Layout ..................................................... 61
                                                                                                                                                         .
  CAN Communication Unit ..................................... 20         .           HOW TO READ HARNESS LAYOUT ................ 61                     .
    TYPE 1/TYPE2 .................................................. 21    .           OUTLINE ............................................................ 62
                                                                                                                                                         .        L
    TYPE 3 ............................................................... 24
                                                                          .           MAIN HARNESS ................................................ 63   .
    TYPE 4/TYPE5 .................................................. 27    .           ENGINE ROOM HARNESS ............................... 66             .
    TYPE 6 ............................................................... 30
                                                                          .           ENGINE HARNESS/VK ENGINE MODELS ....... 69                         .        M
  Function of Detecting Ignition Relay Malfunction ... 34                             ENGINE HARNESS/VQ ENGINE MODELS ...... 70                          .
  CONSULT-II .......................................................... 35.           ENGINE CONTROL HARNESS/VK ENGINE
    CONSULT-II INSPECTION PROCEDURE ........ 35                           .           MODELS ............................................................ 71
                                                                                                                                                         .
    SELF-DIAG RESULTS ....................................... 36          .           ENGINE CONTROL HARNESS/VQ ENGINE
    DATA MONITOR ................................................ 37      .           MODELS ............................................................ 73
                                                                                                                                                         .
    ACTIVE TEST .................................................... 37   .           BODY HARNESS ............................................... 75    .
  Auto Active Test .................................................... 39.           BODY NO.2 HARNESS ..................................... 77         .
    DESCRIPTION ................................................... 39    .           ROOM LAMP HARNESS ................................... 78           .
    OPERATION PROCEDURE .............................. 39                 .           FRONT DOOR HARNESS ................................. 79            .
    INSPECTION IN AUTO ACTIVE TEST MODE ... 39                                        REAR DOOR HARNESS ................................... 80           .
  Schematic ............................................................. 41
                                                                          .           BACK DOOR HARNESS ................................... 81           .
  IPDM E/R Terminal Arrangement .......................... 42             .         Wiring Diagram Codes (Cell Codes) ..................... 82           .
  IPDM E/R Power/Ground Circuit Inspection ......... 43                   .




Revision; 2004 April                                                         PG-1                                                                  2003 FX
ELECTRICAL UNITS LOCATION ............................ 85              .        ELECTRICAL UNITS ...............................................92     .
 Electrical Units Location ........................................ 85 .         Terminal Arrangement ............................................92   .
   ENGINE COMPARTMENT ................................. 85             .        SMJ (SUPER MULTIPLE JUNCTION) .....................94                  .
   PASSENGER COMPARTMENT ......................... 86                  .         Terminal Arrangement ............................................94   .
   LUGGAGE COMPARTMENT ............................. 88                .        STANDARDIZED RELAY .........................................96         .
HARNESS CONNECTOR ........................................ 89          .         Description .............................................................96
                                                                                                                                                       .
 Description ............................................................. 89
                                                                       .           NORMAL OPEN, NORMAL CLOSED AND
   HARNESS CONNECTOR (TAB-LOCKING                                                  MIXED TYPE RELAYS .......................................96         .
   TYPE) ................................................................. 89
                                                                       .           TYPE OF STANDARDIZED RELAYS .................96                     .
   HARNESS CONNECTOR (SLIDE-LOCKING                                             FUSE BLOCK - JUNCTION BOX (J/B) ...................98                  .
   TYPE) ................................................................. 90
                                                                       .         Terminal Arrangement ............................................98   .
JOINT CONNECTOR (J/C) ...................................... 91        .        FUSE, FUSIBLE LINK AND RELAY BOX ...............99                     .
 Terminal Arrangement ........................................... 91   .         Terminal Arrangement ............................................99   .




Revision; 2004 April                                                       PG-2                                                                  2003 FX
                       POWER SUPPLY ROUTING CIRCUIT

POWER SUPPLY ROUTING CIRCUIT                           PFP:24110
                                                                       A
Schematic                                                   AKS007VU




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                                                      TKWM0707E




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                       POWER SUPPLY ROUTING CIRCUIT

Wiring Diagram - POWER -                                    AKS007VV

BATTERY POWER SUPPLY - IGNITION SW. IN ANY POSITION




                                                      TKWM0708E




Revision; 2004 April                PG-4                2003 FX
                       POWER SUPPLY ROUTING CIRCUIT


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                                                      TKWM0709E




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                       POWER SUPPLY ROUTING CIRCUIT




                                                      TKWM0710E




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                                                      TKWM0711E




Revision; 2004 April               PG-7                 2003 FX
                       POWER SUPPLY ROUTING CIRCUIT




                                                      TKWM0712E




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                       POWER SUPPLY ROUTING CIRCUIT


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                                                      TKWM0713E




Revision; 2004 April               PG-9                 2003 FX
                       POWER SUPPLY ROUTING CIRCUIT

ACCESSORY POWER SUPPLY - IGNITION SW. IN "ACC" OR "ON"




                                                         TKWM0714E




Revision; 2004 April               PG-10                   2003 FX
                       POWER SUPPLY ROUTING CIRCUIT


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                                                      TKWM0715E




Revision; 2004 April              PG-11                 2003 FX
                       POWER SUPPLY ROUTING CIRCUIT

IGNITION POWER SUPPLY - IGNITION SW. IN "ON" AND/OR "START"




                                                              TKWM0716E




Revision; 2004 April                PG-12                       2003 FX
                       POWER SUPPLY ROUTING CIRCUIT


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                                                      TKWM0717E




Revision; 2004 April              PG-13                 2003 FX
                       POWER SUPPLY ROUTING CIRCUIT




                                                      TKWH0385E




Revision; 2004 April              PG-14                 2003 FX
                       POWER SUPPLY ROUTING CIRCUIT


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                                                      TKWM0719E




Revision; 2004 April              PG-15                 2003 FX
                       POWER SUPPLY ROUTING CIRCUIT




                                                      TKWM0720E




Revision; 2004 April              PG-16                 2003 FX
                               POWER SUPPLY ROUTING CIRCUIT

Fuse                                                                           AKS007VW

                                                                                           A
q   If fuse is blown, be sure to eliminate cause of incident before
    installing new fuse.
q   Use fuse of specified rating. Never use fuse of more than speci-
    fied rating.                                                                           B
q   Do not partially install fuse; always insert it into fuse holder prop-
    erly.
                                                                                           C
q   Remove fuse for "ELECTRICAL PARTS (BAT)" if vehicle is not
    used for a long period of time.

                                                                                           D
                                                                             CEL083


Fusible Link                                                                    AKS007VX

                                                                                           E
A melted fusible link can be detected either by visual inspection or by
feeling with finger tip. If its condition is questionable, use circuit
tester or test lamp.
CAUTION:                                                                                   F
q    If fusible link should melt, it is possible that critical circuit
     (power supply or large current carrying circuit) is shorted.
     In such a case, carefully check and eliminate cause of inci-                          G
     dent.
q    Never wrap outside of fusible link with vinyl tape. Important:
     Never let fusible link touch any other wiring harness, vinyl                          H
     or rubber parts.                                                        CKIM0195E



Circuit Breaker                                                                 AKS007VY


The PTC thermistor generates heat in response to current flow. The                          I
temperature (and resistance) of the thermistor element varies with
current flow. Excessive current flow will cause the element's temper-
ature to rise. When the temperature reaches a specified level, the                         J
electrical resistance will rise sharply to control the circuit current.
Reduced current flow will cause the element to cool. Resistance falls
accordingly and normal circuit current flow is allowed to resume.
                                                                                           PG


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Revision; 2004 April                                  PG-17                  2003 FX
      IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
                                                                                                                        PFP:284B7

System Description                                                                                                           AKS005S9


q  IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block
   which were originally placed in engine room. It controls integrated relay via IPDM E/R control circuit.
q  IPDM E/R-integrated control circuit performs ON-OFF operation of relay, CAN communication control, oil
   pressure switch signal, hood switch signal reception, etc.
q  It controls operation of each electrical part via ECM, BCM and CAN communication lines.
CAUTION:
None of the IPDM E/R-integrated relays can be removed.
SYSTEMS CONTROLLED BY IPDM E/R
1.     Lamp control
       Using CAN communication line, it receives signal from BCM and controls the following lamps:
       q Headlamps (Hi, Lo)

       q Parking lamps

       q Tail lamps

       q Front fog lamps

2.     Wiper control
       Using CAN communication line, it receives signals from BCM and controls the front wipers.
3.     Rear window defogger relay control
       Using CAN communication line, it receives signals from BCM and controls the rear window defogger
       relay.
4.     A/C compressor control
       Using CAN communication line, it receives signals from ECM and controls the A/C relay.
5.     Cooling fan control
       Using CAN communication line, it receives signals from ECM and controls cooling fan relay.
6.     Horn control
       Using CAN communication line, it receives signals from BCM and controls horn relay.
CAN COMMUNICATION LINE CONTROL
With CAN communication, by connecting each control unit using two communication lines (CAN L line, CAN H
line), it is possible to transmit maximum amount of information with minimum wiring. Each control unit can
transmit and receive data, and reads necessary information only.
1. Fail-safe control
     q When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control.
         After CAN communication recovers normally, it also returns to normal control.
     q Operation of control parts by IPDM E/R during fail-safe mode is as follows:

    Controlled system                                                      Fail-safe mode
                                   q   With the ignition switch ON, the headlamp (low) is ON.
    Headlamp
                                   q   With the ignition switch OFF, the headlamp (low) is OFF.
    Tail and parking lamps         q   With the ignition switch ON, the tail and parking lamps is ON.
                                   q   With the ignition switch OFF, the tail and parking lamps is OFF.
                                   q   With the ignition switch ON, the cooling fan HI operates.
    Cooling fan
                                   q   With the ignition switch OFF, the cooling fan stops.
                                   Until the ignition switch is turned off, the front wiper LO and HI remains in the same status it
    Front wiper
                                   was in just before fail-safe control was initiated.
    Rear window defogger           Rear window defogger relay OFF
    A/C compressor                 A/C compressor OFF
    Front fog lamps                Front fog lamp relay OFF




Revision; 2004 April                                   PG-18                                                             2003 FX
   IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

IPDM E/R STATUS CONTROL
In order to save power, IPDM E/R switches status by itself based on each operating condition.             A
1. CAN communication status
     q CAN communication is normally performed with other control units.
                                                                                                          B
     q Individual unit control by IPDM E/R is normally performed.

     q When sleep request signal is received from BCM, mode is switched to sleep waiting status.

2. Sleep waiting status                                                                                   C
     q Process to stop CAN communication is activated.

     q All systems controlled by IPDM E/R are stopped. When 1 seconds have elapsed after CAN communi-
       cation with other control units is stopped, mode switches to sleep status.                         D
3. Sleep status
     q IPDM E/R operates in low current-consumption mode.

     q CAN communication is stopped.                                                                      E
     q When a change in CAN communication line is detected, mode switches to CAN communication status.

     q When a change hood switch or ignition switch signal is detected, mode switches to CAN communica-
       tion status.                                                                                       F


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Revision; 2004 April                           PG-19                                           2003 FX
   IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

CAN Communication System Description                                                                                AKS005SA


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. Modern
vehicles are equipped with many electronic control units and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected 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                                                                                              AKS0080F


 Body type                                                                        Wagon
 Axle                                                          2WD                                    AWD
 Engine                                                      VQ35DE                             VQ35DE/VK45DE
 Transmission                                                                         A/T
 Brake control                                                                    VDC
 Navigation system                                                            



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