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POWER SUPPLY, GROUND & CIRCUIT ELEMENTS

K ELECTRICAL

POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
SECTION PG B

E
CONTENTS
POWER SUPPLY ROUTING CIRCUIT ..................... 3 . GROUND .................................................................. 29
. F
Schematic ............................................................... 3
. Ground Distribution ................................................ 29
.
Wiring Diagram -- POWER -- ................................ 4 . MAIN HARNESS ................................................ 29 .
BATTERY POWER SUPPLY -- IGNITION SW. ENGINE ROOM HARNESS ............................... 34 . G
IN ANY POSITION ............................................... 4 . ENGINE CONTROL HARNESS ......................... 37 .
ACCESSORY POWER SUPPLY -- IGNITION BODY HARNESS ............................................... 38 .
SW. IN "ACC" OR "ON" ........................................ 9 . HARNESS ................................................................ 42
.
H
IGNITION POWER SUPPLY -- IGNITION SW. Harness Layout ..................................................... 42
.
IN "ON" AND/OR "START" ................................. 10 . HOW TO READ HARNESS LAYOUT ................ 42 .
Fuse ...................................................................... 15
. OUTLINE ............................................................ 43
.
Fusible Link ........................................................... 15
. MAIN HARNESS ................................................ 44 . I
Circuit Breaker ...................................................... 15
. ENGINE ROOM HARNESS ............................... 47 .
IPDM E/R (INTELLIGENT POWER DISTRIBUTION ENGINE CONTROL HARNESS (2WD) ............. 52 .
MODULE ENGINE ROOM) ..................................... 16 . ENGINE CONTROL HARNESS (AWD) ............. 54 . J
System Description ............................................... 16 . BODY HARNESS ............................................... 56 .
SYSTEMS CONTROLLED BY IPDM E/R .......... 16 . BODY NO. 2 HARNESS .................................... 60 .
CAN COMMUNICATION LINE CONTROL ........ 16 . ROOM LAMP HARNESS ................................... 61 .
PG
IPDM E/R STATUS CONTROL .......................... 17 . FRONT DOOR HARNESS ................................. 62 .
CAN Communication System Description ............. 17 . REAR DOOR HARNESS ................................... 63 .
CAN Communication Unit ..................................... 17 . Wiring Diagram Codes (Cell Codes) ..................... 64 .
Function of Detecting Ignition Relay Malfunction ... 17 ELECTRICAL UNITS LOCATION ........................... 67 . L
CONSULT-II Function (IPDM E/R) ........................ 18 . Electrical Units Location ........................................ 67 .
CONSULT-II BASIC OPERATION ...................... 18 . ENGINE COMPARTMENT ................................. 67 .
SELF-DIAG RESULTS ....................................... 19 . PASSENGER COMPARTMENT ........................ 68 . M
DATA MONITOR ................................................ 20 . LUGGAGE COMPARTMENT ............................. 70 .
ACTIVE TEST .................................................... 21 . HARNESS CONNECTOR ........................................ 71 .
Auto Active Test .................................................... 22. Description ............................................................. 71
.
DESCRIPTION ................................................... 22 . HARNESS CONNECTOR (TAB-LOCKING
OPERATION PROCEDURE .............................. 22 . TYPE) ................................................................. 71
.
INSPECTION IN AUTO ACTIVE TEST MODE ... 22 HARNESS CONNECTOR (SLIDE-LOCKING
Schematic ............................................................. 24
. TYPE) ................................................................. 72
.
IPDM E/R Terminal Arrangement .......................... 25 . ELECTRICAL UNITS ............................................... 73 .
IPDM E/R Power/Ground Circuit Inspection ......... 26 . Terminal Arrangement ........................................... 73 .
Inspection With CONSULT-II (Self-Diagnosis) ...... 27 . SMJ (SUPER MULTIPLE JUNCTION) .................... 74 .
Removal and Installation of IPDM E/R .................. 28 . Terminal Arrangement ........................................... 74 .
REMOVAL .......................................................... 28 . STANDARDIZED RELAY ......................................... 76 .
INSTALLATION .................................................. 28 . Description ............................................................. 76
.
NORMAL OPEN, NORMAL CLOSED AND
MIXED TYPE RELAYS ....................................... 76 .
TYPE OF STANDARDIZED RELAYS ................ 76 .

Revision: 2006 August PG-1 2006 G35 Sedan
FUSE BLOCK - JUNCTION BOX (J/B) ................... 78 . FUSE, FUSIBLE LINK AND RELAY BOX ...............79 .
Terminal Arrangement ........................................... 78
. Terminal Arrangement ............................................79
.

Revision: 2006 August PG-2 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

POWER SUPPLY ROUTING CIRCUIT PFP:24110
A
Schematic NKS0015K

TKWM3436E

Revision: 2006 August PG-3 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

Wiring Diagram -- POWER -- NKS0015L

BATTERY POWER SUPPLY -- IGNITION SW. IN ANY POSITION

TKWM3437E

Revision: 2006 August PG-4 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

TKWM3438E

Revision: 2006 August PG-5 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

TKWM2140E

Revision: 2006 August PG-6 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

TKWT1570E

Revision: 2006 August PG-7 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

TKWM2141E

Revision: 2006 August PG-8 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

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

TKWM3439E

Revision: 2006 August PG-9 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

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

TKWM3440E

Revision: 2006 August PG-10 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

TKWM2144E

Revision: 2006 August PG-11 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

TKWT1575E

Revision: 2006 August PG-12 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

TKWM2145E

Revision: 2006 August PG-13 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

TKWM2146E

Revision: 2006 August PG-14 2006 G35 Sedan
POWER SUPPLY ROUTING CIRCUIT

Fuse NKS0015M

A
q If fuse is blown, be sure to eliminate cause of malfunction 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 NKS0015N

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 mal- G
function.
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. CKIT0163E

Circuit Breaker NKS0015O

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

L
SEL109W

Revision: 2006 August PG-15 2006 G35 Sedan
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

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

System Description NKS0015P

q IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block
which were originally placed in engine compartment. It controls integrated relay via IPDM E/R control cir-
cuit.
q IPDM E/R-integrated control circuit performs ON-OFF operation of relay, CAN communication control, oil
pressure switch signal, and 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 Head lamps (Hi, Lo)

q Parking, license plate, side marker and tail lamps

q Front fog lamps

2. Wiper control
Using CAN communication line, it receives signals from BCM and controls the front wiper.
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 compressor.
5. Cooling fan control
Using CAN communication line, it receives signals from ECM and controls cooling fan.
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.

Parking, license plate, side q With the ignition switch ON, the parking, license plate, side marker and tail lamps is ON.
marker and tail lamps q With the ignition switch OFF, the parking, license plate, side marker and tail 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 was in just
Front wiper
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: 2006 August PG-16 2006 G35 Sedan
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 3 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 power 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

CAN Communication System Description NKS0015Q

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul- G
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 H
with less wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Unit NKS0015R
I
Refer to LAN-27, "CAN Communication Unit" .
Function of Detecting Ignition Relay Malfunction NKS0015S
J
q When contact point of integrated ignition relay is stuck and cannot be turned OFF, IPDM E/R turns ON tail
and parking lamps for 10 minutes to indicate ignition relay malfunction.
q When a state of ignition relay having built-in does not agree with a state of Ignition switch signal input by a PG
CAN communication from BCM, IPDM E/R lets tail lamp relay operate.
Ignition switch signal Ignition relay status Tail lamp relay
ON ON -- L
OFF OFF --
ON OFF --
M
OFF ON ON (10 minutes)
NOTE:
When the ignition switch is turned ON, the tail lamps are OFF.

Revision: 2006 August PG-17 2006 G35 Sedan
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

CONSULT-II Function (IPDM E/R) NKS0015T

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
Inspection Item, Diagnosis Mode Description
SELF-DIAG RESULTS The IPDM E/R performs diagnosis of the CAN communication and self-diagnosis.
DATA MONITOR The input/output data of the IPDM E/R is displayed in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST The IPDM E/R sends a drive signal to electronic components to check their operation.

CONSULT-II BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II CONVERTER to the data link connector, then turn the
ignition switch ON.

PIIA1095E

2. Touch "START (NISSAN BASED VHCL)".

BCIA0029E

3. Touch "IPDM E/R" on "SELECT SYSTEM" screen.
q If "IPDM E/R" is not indicated, refer to GI-39, "CONSULT-II
Data Link Connector (DLC) Circuit" .

BCIA0030E

Revision: 2006 August PG-18 2006 G35 Sedan
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

4. Select the desired part to be diagnosed on the "SELECT DIAG
MODE" screen. A

BCIA0031E

D
SELF-DIAG RESULTS
Operation Procedure
1. Touch "SELF-DIAG RESULTS" on "SELECT DIAG MODE" screen. E
2. Check display content in self-diagnostic results.
Display Item List
TIME F
CONSULT-II
Display Items Malfunction detecting condition Possible causes
display code CRNT PAST
NO DTC IS
G
DETECTED.FURTHER
- - - - -
TESTING MAY BE
REQUIRED.
q If CAN communication reception/transmission H
Any of or several items
data has a malfunction, or if any of the control below have errors.
units malfunction, data reception/transmission
CAN COMM CIRC U1000 cannot be confirmed.

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