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K ELECTRICAL

POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
SECTION PG B

E
CONTENTS
PRECAUTIONS ......................................................... 3 . Inspection with CONSULT-II (Self-Diagnosis) ....... 29 . F
Precautions for Supplemental Restraint System Removal and Installation of IPDM E/R .................. 30 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- REMOVAL .......................................................... 30.
SIONER" ................................................................. 3
. INSTALLATION .................................................. 30 . G
POWER SUPPLY ROUTING CIRCUIT ..................... 4 . GROUND CIRCUIT .................................................. 31 .
Schematic ............................................................... 4
. Ground Distribution ................................................ 31.
Wiring Diagram -- POWER -- ................................ 6 . MAIN HARNESS ................................................ 31 .
H
BATTERY POWER SUPPLY -- IGNITION SW. ENGINE ROOM HARNESS ............................... 34 .
IN ANY POSITION ............................................... 6 . ENGINE CONTROL HARNESS ......................... 37 .
ACCESSORY POWER SUPPLY -- IGNITION BODY HARNESS ............................................... 38 .
SW. IN ACC OR ON ............................................11 . BODY NO. 2 HARNESS .................................... 39 . I
IGNITION POWER SUPPLY -- IGNITION SW. HARNESS ................................................................ 40
.
IN ON ................................................................. 12
. Harness Layout ..................................................... 40.
IGNITION POWER SUPPLY -- IGNITION SW. HOW TO READ HARNESS LAYOUT ................ 40 . J
IN ON AND/OR START ...................................... 13 . OUTLINE (KING CAB MODELS) ....................... 41 .
Fuse ...................................................................... 17
. OUTLINE (CREW CAB MODELS) ..................... 42 .
Fusible Link ........................................................... 17
. MAIN HARNESS ................................................ 43 .
PG
Circuit Breaker (Built Into BCM) ............................ 17 . ENGINE ROOM HARNESS (LH VIEW) ............. 45 .
IPDM E/R (INTELLIGENT POWER DISTRIBUTION ENGINE ROOM HARNESS (RH VIEW) ............ 48 .
MODULE ENGINE ROOM) ..................................... 18 . ENGINE CONTROL HARNESS ......................... 50 .
System Description ............................................... 18 . CHASSIS HARNESS ......................................... 52 . L
SYSTEMS CONTROLLED BY IPDM E/R .......... 18 . BODY HARNESS (KING CAB MODELS) .......... 54 .
CAN COMMUNICATION LINE CONTROL ........ 18 . BODY HARNESS (CREW CAB MODELS) ........ 56 .
IPDM E/R STATUS CONTROL .......................... 19 . BODY NO. 2 HARNESS (KING CAB MODELS) 58 ... M
CAN Communication System Description ............. 19 . BODY NO. 2 HARNESS (CREW CAB MODELS) 60 ...
Function of Detecting Ignition Relay Malfunction ... 19 ROOM LAMP HARNESS ................................... 62 .
CONSULT-II Function (IPDM E/R) ........................ 20 . FRONT DOOR HARNESS LH ........................... 63 .
CONSULT-II START PROCEDURE ................... 20 . FRONT DOOR HARNESS RH ........................... 63 .
SELF-DIAGNOSTIC RESULTS ......................... 20 . REAR DOOR HARNESS LH (CREW CAB MOD-
DATA MONITOR ................................................ 20 . ELS) ................................................................... 64
.
CAN DIAG SUPPORT MNTR ............................ 21 . REAR DOOR HARNESS RH (CREW CAB MOD-
ACTIVE TEST .................................................... 21 . ELS) ................................................................... 64
.
Auto Active Test .................................................... 22. Wiring Diagram Codes (Cell Codes) ..................... 65 .
DESCRIPTION ................................................... 22 . ELECTRICAL UNITS LOCATION ........................... 68 .
OPERATION PROCEDURE .............................. 22 . Electrical Units Location ........................................ 68 .
INSPECTION IN AUTO ACTIVE TEST MODE ... 22 ENGINE COMPARTMENT ................................. 68 .
Terminals and Reference Values for IPDM E/R .... 24 . PASSENGER COMPARTMENT ........................ 69 .
IPDM E/R Terminal Arrangement .......................... 27 . HARNESS CONNECTOR ........................................ 71 .
IPDM E/R Power/Ground Circuit Inspection ......... 28 . Description ............................................................. 71
.
HARNESS CONNECTOR (TAB-LOCKING

Revision: August 2006 PG-1 2007 Titan
TYPE) ................................................................. 71
. MIXED TYPE RELAYS .......................................75 .
HARNESS CONNECTOR (SLIDE-LOCKING TYPE OF STANDARDIZED RELAYS .................75 .
TYPE) ................................................................. 72
. SUPER MULTIPLE JUNCTION (SMJ) .....................77 .
HARNESS CONNECTOR (DIRECT-CONNECT Terminal Arrangement ............................................77
.
SRS COMPONENT TYPE) ................................ 73 . FUSE BLOCK-JUNCTION BOX (J/B) .....................79 .
ELECTRICAL UNITS ............................................... 74 . Terminal Arrangement ............................................79
.
Terminal Arrangement ........................................... 74 . FUSE AND FUSIBLE LINK BOX .............................80 .
STANDARDIZED RELAY ......................................... 75 . Terminal Arrangement ............................................80
.
Description ............................................................. 75
. FUSE AND RELAY BOX ..........................................81.
NORMAL OPEN, NORMAL CLOSED AND Terminal Arrangement ............................................81
.

Revision: August 2006 PG-2 2007 Titan
PRECAUTIONS

PRECAUTIONS PFP:00011
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00AR4

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
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 C
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: D
G 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. E
G 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. F
G 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.
G

Revision: August 2006 PG-3 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

POWER SUPPLY ROUTING CIRCUIT PFP:24110

Schematic EKS00AR6

For detailed ground distribution, refer to PG-31, "Ground Distribution" .

WKWA3837E

Revision: August 2006 PG-4 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

WKWA5471E

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POWER SUPPLY ROUTING CIRCUIT

Wiring Diagram -- POWER -- EKS00AR7

BATTERY POWER SUPPLY -- IGNITION SW. IN ANY POSITION

WKWA3839E

Revision: August 2006 PG-6 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

WKWA3840E

Revision: August 2006 PG-7 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

WKWA3841E

Revision: August 2006 PG-8 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

WKWA3842E

Revision: August 2006 PG-9 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

WKWA5482E

Revision: August 2006 PG-10 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

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

WKWA5472E

Revision: August 2006 PG-11 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

IGNITION POWER SUPPLY -- IGNITION SW. IN ON

WKWA3845E

Revision: August 2006 PG-12 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

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

WKWA3846E

Revision: August 2006 PG-13 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

WKWA5483E

Revision: August 2006 PG-14 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

WKWA5473E

Revision: August 2006 PG-15 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

WKWA3849E

Revision: August 2006 PG-16 2007 Titan
POWER SUPPLY ROUTING CIRCUIT

Fuse EKS00GMD

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

D
CEL083

Fusible Link EKS00GME

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:
G If fusible link should melt, it is possible that critical circuit (power supply or large current carrying F
circuit) is shorted. In such a case, carefully check and eliminate cause of incident.
G Never wrap outside of fusible link with vinyl tape.
G Never let fusible link touch any other wiring harness, vinyl or rubber parts. G

Circuit Breaker (Built Into BCM) EKS00GMF

For example, when current is 30A, the circuit is broken within 8 to 20 H
seconds.
A circuit breaker is used for the following systems:
G Power windows I
G Power door locks
G Remote keyless entry system
G Power sunroof J
G Rear window wiper

SBF284E PG

Revision: August 2006 PG-17 2007 Titan
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

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

System Description EKS00AR8

G 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 relays via IPDM E/R control cir-
cuits.
G IPDM E/R-integrated control circuits perform ON-OFF operation of relays, CAN communication control,
etc.
G It controls operation of each electrical component 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 lines, it receives signals from the BCM and controls the following lamps:
G Headlamps (Hi, Lo)

G Parking lamps

G Tail and license lamps

G Front fog lamps

2. Wiper control
Using CAN communication lines, it receives signals from the BCM and controls the front wipers.
3. Heated mirror relay control
Using CAN communication lines, it receives signals from the BCM and controls the heated mirror relay.
4. A/C compressor control
Using CAN communication lines, it receives signals from the ECM and controls the A/C compressor
(magnetic clutch).
5. Starter control
Using CAN communication lines, it receives signals from the BCM and controls the starter relay.
6. Cooling fan control
Using CAN communication lines, it receives signals from the ECM and controls the cooling fan relays.
7. Horn control
Using CAN communication lines, it receives signals from the BCM and controls the 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 a maximum amount of information with minimum wiring. Each control unit can
transmit and receive data, and reads necessary information only.
1. Fail-safe control
G When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control.
After CAN communication returns to normal operation, it also returns to normal control.
G Operation of control parts by IPDM E/R during fail-safe mode is as follows:

Controlled system Fail-safe mode
G With the ignition switch ON, the headlamp (low) is ON.
Headlamp
G With the ignition switch OFF, the headlamp (low) is OFF.
G With the ignition switch ON, the tail and parking lamps are ON.
Tail and parking lamps
G With the ignition switch OFF, the tail and parking lamps are OFF.
G With the ignition switch ON, the cooling fan HI operates.
Cooling fan
G 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: August 2006 PG-18 2007 Titan
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
G CAN communication is normally performed with other control units.
B
G Individual unit control by IPDM E/R is normally performed.

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

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

G All systems controlled by IPDM E/R are stopped. When 1 second has elapsed after CAN communica-
tion with other control units is stopped, mode switches to sleep status. D
3. Sleep status
G IPDM E/R operates in low current-consumption mode.

G CAN communication is stopped. E
G When a change in CAN communication signal is detected, mode switches to CAN communication sta-
tus.
G When a change in ignition switch signal is detected, mode switches to CAN communication status. F

CAN Communication System Description EKS00AR9

Refer to LAN-2, "SYSTEM DESCRIPTION" . G
Function of Detecting Ignition Relay Malfunction EKS00ARA

G When the integrated ignition relay is stuck in a "closed contact" position and cannot be turned OFF, IPDM H
E/R turns ON tail and parking lamps for 10 minutes to indicate IPDM E/R malfunction.
G When the state of the integrated ignition relay does not agree with the state of the ignition switch signal
received via CAN communication, the IPDM E/R activates the tail lamp relay.
I
Ignition switch signal Ignition relay status Tail lamp relay
ON ON --
OFF OFF -- J
ON OFF --
OFF ON ON (10 minutes)
PG
NOTE:
When the ignition switch is turned ON, the tail lamps are OFF.
L

Revision: August 2006 PG-19 2007 Titan
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

CONSULT-II Function (IPDM E/R) EKS00ARB

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
IPDM E/R diagnostic Mode Description
SELF-DIAG RESULTS Displays IPDM E/R self-diagnosis results.
DATA MONITOR Displays IPDM E/R input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.

CONSULT-II START PROCEDURE
Refer to LAN-2, "SYSTEM DESCRIPTION" .
SELF-DIAGNOSTIC RESULTS
Display Item List
CONSULT-II TIME Possible causes
Display items Malfunction detection
display code CRNT PAST
NO DTC IS DETECTED.
FURTHER TESTING -- -- -- -- --
MAY BE REQUIRED.
G If CAN communication reception/transmission Any of items listed
data has a malfunction, or if any of the control below have errors:
units fail, data reception/transmission cannot
CAN COMM CIRC U1000 X X G TRANSMIT DIAG
be confirmed.
G ECM
G When the data in CAN communication is not
received before the specified time. G BCM/SEC

NOTE:
The details for display of the period are as follows:
G CRNT: Error currently detected with IPDM E/R.
G PAST: Error detected in the past and placed in IPDM E/R memory.
DATA MONITOR
ALL SIGNALS All signals will be monitored.
MAIN SIGNALS Monitors the predetermined item(s).
SELECTION FROM MENU Selects and monitors individual signal(s).

Revision: August 2006 PG-20 2007 Titan
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

All Signals, Main Signals, Selection From Menu
Monitor item selection
A
CONSULT-II
Item name Display or unit ALL MAIN SELECTION Description
screen display
SIGNALS SIGNALS FROM MENU
B
MOTOR FAN
Motor fan request 1/2/3/4 X X X Signal status input from ECM
REQ
Compressor
AC COMP REQ ON/OFF X X X Signal status input from ECM C
request
Parking, license,
and tail lamp TAIL & CLR REQ ON/OFF X X X Signal status input from BCM
request D
Headlamp low
HL LO REQ ON/OFF X X X Signal status input from BCM
beam request
Headlamp high E
HL HI REQ ON/OFF X X X Signal status input from BCM
beam request
Front fog request FR FOG REQ ON/OFF X X X Signal status input from BCM
Front wiper STOP/1LOW/ F
FR WIP REQ X X X Signal status input from BCM
request LOW/HI
WIP AUTO
Wiper auto stop ACT P/STOP P X X X Output status of IPDM E/R
STOP G
Wiper protection WIP PROT OFF/Block X X X Control status of IPDM E/R
Starter request ST RLY REQ ON/OFF X X Status of input signal NOTE
H
Ignition relay Ignition relay status monitored
IGN RLY ON/OFF X X X
status with IPDM E/R
Rear defogger
I
request (heated RR DEF REQ ON/OFF X X X Signal status input from BCM
mirror)
Oil pressure Signal status input from IPDM
OIL P SW (*1) OPEN/CLOSE X X J
switch E/R
Signal status input from IPDM
Hood switch HOOD SW (*1) OFF X
E/R
Theft warning
PG
THFT HRN REQ ON/OFF X X Signal status input from BCM
horn request
Horn chirp HORN CHIRP ON/OFF X X Output status of IPDM E/R
L
Daytime running
DTRL REQ ON/OFF X X Signal status input from BCM
lamp request

NOTE: M
G Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is in ACC posi-
tion, display may not be correct.
G (*1) This item is displayed, but does not function.
CAN DIAG SUPPORT MNTR
Refer to LAN-2, "SYSTEM DESCRIPTION" .
ACTIVE TEST
Test name CONSULT-II screen display Description
With a certain ON-OFF operation, the heated mirror relay can be oper-
Rear defogger output REAR DEFOGGER
ated.
With a certain operation (OFF, HI ON, LO ON), the front wiper relay
Front wiper (HI, LO) output FRONT WIPER
(Lo, Hi) can be operated.
Cooling fan output MOTOR FAN With a certain operation (1, 2, 3, 4), the cooling fan can be operated.
Lamp (HI, LO, TAIL, FOG) With a certain operation (OFF, HI ON, LO ON, TAIL ON, FOG ON), the
EXTERNAL LAMPS
output lamp relay (Low, High, Tail, Fog) can be operated.

Revision: August 2006 PG-21 2007 Titan
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

Test name CONSULT-II screen display Description
Cornering lamp output CORNERING LAMP --
Horn output HORN With a certain ON-OFF operation, the horn relay can be operated.

Auto Active Test EKS00ARC

DESCRIPTION
G In auto active test mode, operation inspection can be performed when IPDM E/R sends a drive signal to
the following systems:

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