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POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
A
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
SECTION PG B
C
D
E
CONTENTS
POWER SUPPLY ROUTING ..................................... 2 . BODY HARNESS ............................................... 32 . F
Schematic ............................................................... 2
. BODY NO. 2 HARNESS .................................... 33 .
Wiring Diagram - POWER - .................................... 3 . ROOM LAMP HARNESS ................................... 34 .
BATTERY POWER SUPPLY - IGNITION SW. IN FRONT DOOR HARNESS ................................. 35 . G
ANY POSITION .................................................... 3 . REAR DOOR HARNESS ................................... 36 .
ACCESSORY POWER SUPPLY - IGNITION SW. BACK DOOR HARNESS ................................... 37 .
IN "ACC" OR "ON" ............................................... 7 . Wiring Diagram Codes (Cell Codes) ..................... 38 .
H
IGNITION POWER SUPPLY - IGNITION SW. IN ELECTRICAL UNITS LOCATION ........................... 41 .
"ON" AND/OR "START" ........................................ 8 . Electrical Units Location ........................................ 41 .
Fuse ...................................................................... 12
. ENGINE COMPARTMENT ................................. 41 .
Fusible Link ........................................................... 12
. PASSENGER COMPARTMENT ........................ 42 . I
Circuit Breaker ...................................................... 12
. HARNESS CONNECTOR ........................................ 44 .
GROUND ................................................................. 13
. Description ............................................................. 44
.
Ground Distribution ............................................... 13 . HARNESS CONNECTOR (TAB-LOCKING J
MAIN HARNESS ................................................ 13 . TYPE) ................................................................. 44
.
ENGINE ROOM HARNESS ............................... 15 . HARNESS CONNECTOR (SLIDE-LOCKING
ENGINE CONTROL HARNESS ........................ 17 . TYPE) ................................................................. 45
.
PG
BODY HARNESS ............................................... 18 . ELECTRICAL UNITS ............................................... 46 .
BODY NO. 2 HARNESS .................................... 19 . Terminal Arrangement ........................................... 46 .
BACK DOOR SUB HARNESS/REAR WINDOW STANDARDIZED RELAY ......................................... 47 .
DEFOGGER HARNESS .................................... 20 . Description ............................................................. 47
. L
HARNESS ................................................................ 21
. NORMAL OPEN, NORMAL CLOSED AND
Harness Layout ..................................................... 21 . MIXED TYPE RELAYS ....................................... 47 .
HOW TO READ HARNESS LAYOUTS .............. 21 . TYPE OF STANDARDIZED RELAYS ................ 47 . M
OUTLINE ............................................................ 22
. FUSE BLOCK - JUNCTION BOX (J/B) ................... 49 .
MAIN HARNESS ................................................ 23 . Terminal Arrangement ........................................... 49 .
ENGINE ROOM HARNESS ............................... 25 . FUSE AND FUSIBLE LINK BOX ............................. 50 .
ENGINE CONTROL HARNESS ........................ 30 . Terminal Arrangement ........................................... 50 .
Revision: 2005 March PG-1 2005 X-Trail
POWER SUPPLY ROUTING
POWER SUPPLY ROUTING PFP:00011
Schematic AKS00BER
TKWB0202E
Revision: 2005 March PG-2 2005 X-Trail
POWER SUPPLY ROUTING
Wiring Diagram - POWER - AKS00BES
BATTERY POWER SUPPLY - IGNITION SW. IN ANY POSITION A
B
C
D
E
F
G
H
I
J
PG
L
M
TKWB0203E
Revision: 2005 March PG-3 2005 X-Trail
POWER SUPPLY ROUTING
TKWB0204E
Revision: 2005 March PG-4 2005 X-Trail
POWER SUPPLY ROUTING
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKWB0205E
Revision: 2005 March PG-5 2005 X-Trail
POWER SUPPLY ROUTING
TKWB0206E
Revision: 2005 March PG-6 2005 X-Trail
POWER SUPPLY ROUTING
ACCESSORY POWER SUPPLY - IGNITION SW. IN "ACC" OR "ON"
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKWB0207E
Revision: 2005 March PG-7 2005 X-Trail
POWER SUPPLY ROUTING
IGNITION POWER SUPPLY - IGNITION SW. IN "ON" AND/OR "START"
TKWB0208E
Revision: 2005 March PG-8 2005 X-Trail
POWER SUPPLY ROUTING
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKWB0209E
Revision: 2005 March PG-9 2005 X-Trail
POWER SUPPLY ROUTING
TKWB0210E
Revision: 2005 March PG-10 2005 X-Trail
POWER SUPPLY ROUTING
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKWB0211E
Revision: 2005 March PG-11 2005 X-Trail
POWER SUPPLY ROUTING
Fuse AKS00BET
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.
q Do not partially install fuse; always insert it into fuse holder prop-
erly.
q Remove fuse for "ELECTRICAL PARTS (BAT)" if vehicle is not
used for a long period of time.
CEL083
Fusible Link AKS00BEU
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:
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-
function.
q Never wrap outside of fusible link with vinyl tape. Important:
Never let fusible link touch any other wiring harness, vinyl
or rubber parts. CKIB0025E
Circuit Breaker AKS00BEV
The PTC thermistor generates heat in response to current flow. The
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
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.
SEL109W
Revision: 2005 March PG-12 2005 X-Trail
GROUND
GROUND PFP:00011
A
Ground Distribution AKS00BEW
MAIN HARNESS
B
C
D
E
F
G
H
I
J
PG
L
M
CKIB0026E
Revision: 2005 March PG-13 2005 X-Trail
GROUND
CKIB0027E
Revision: 2005 March PG-14 2005 X-Trail
GROUND
ENGINE ROOM HARNESS
A
B
C
D
E
F
G
H
I
J
PG
L
M
CKIB0028E
Revision: 2005 March PG-15 2005 X-Trail
GROUND
CKIB0029E
Revision: 2005 March PG-16 2005 X-Trail
GROUND
ENGINE CONTROL HARNESS
A
B
C
D
E
F
G
H
I
J
PG
L
M
CKIB0030E
Revision: 2005 March PG-17 2005 X-Trail
GROUND
BODY HARNESS
CKIB0031E
Revision: 2005 March PG-18 2005 X-Trail
GROUND
BODY NO. 2 HARNESS
A
B
C
D
E
F
G
H
I
J
PG
L
M
CKIB0032E
Revision: 2005 March PG-19 2005 X-Trail
GROUND
BACK DOOR SUB HARNESS/REAR WINDOW DEFOGGER HARNESS
CKIA0376E
Revision: 2005 March PG-20 2005 X-Trail
HARNESS
HARNESS PFP:00011
A
Harness Layout AKS00BEX
HOW TO READ HARNESS LAYOUTS
The following Harness Layouts use a map style grid to help locate B
connectors on the figures:
q Main Harness
q Engine Room Harness (Engine Compartment) C
D
SEL252V
E
To Use the Grid Reference
1. Find the desired connector number on the connector list.
2. Find the grid reference. F
3. On the figure, find the crossing of the grid reference letter column and number row.
4. Find the connector number in the crossing zone.
G
5. Follow the line (if used) to the connector.
CONNECTOR SYMBOL
Main symbols of connector (in Harness Layout) are indicated in the below.
H
I
J
PG
SKIA0404E
L
M
Revision: 2005 March PG-21 2005 X-Trail
HARNESS
OUTLINE
TKIA0131E
Revision: 2005 March PG-22 2005 X-Trail
HARNESS
MAIN HARNESS
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKIB0041E
Revision: 2005 March PG-23 2005 X-Trail
HARNESS
TKIB0042E
Revision: 2005 March PG-24 2005 X-Trail
HARNESS
ENGINE ROOM HARNESS
Engine Compartment for 2WD Models A
B
C
D
E
F
G
H
I
J
PG
L
M
TKIB0045E
Revision: 2005 March PG-25 2005 X-Trail
HARNESS
TKIB0046E
Revision: 2005 March PG-26 2005 X-Trail
HARNESS
Engine Compartment for AWD Models
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKIB0043E
Revision: 2005 March PG-27 2005 X-Trail
HARNESS
TKIB0044E
Revision: 2005 March PG-28 2005 X-Trail
HARNESS
Passenger Compartment
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKIB0047E
Revision: 2005 March PG-29 2005 X-Trail
HARNESS
ENGINE CONTROL HARNESS
A/T Models
TKIB0048E
Revision: 2005 March PG-30 2005 X-Trail
HARNESS
M/T Models
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKIB0049E
Revision: 2005 March PG-31 2005 X-Trail
HARNESS
BODY HARNESS
TKIB0050E
Revision: 2005 March PG-32 2005 X-Trail
HARNESS
BODY NO. 2 HARNESS
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKIB0051E
Revision: 2005 March PG-33 2005 X-Trail
HARNESS
ROOM LAMP HARNESS
TKIB0052E
Revision: 2005 March PG-34 2005 X-Trail
HARNESS
FRONT DOOR HARNESS
LH Side A
B
C
D
E
F
G
H
I
TKIB0031E
RH Side
J
PG
L
M
TKIB0053E
Revision: 2005 March PG-35 2005 X-Trail
HARNESS
REAR DOOR HARNESS
LH Side
TKIB0054E
RH Side
TKIB0055E
Revision: 2005 March PG-36 2005 X-Trail
HARNESS
BACK DOOR HARNESS
A
B
C
D
E
F
G
H
I
J
PG
L
M
TKIB0056E
Revision: 2005 March PG-37 2005 X-Trail
HARNESS
Wiring Diagram Codes (Cell Codes) AKS00BEY
Use the chart below to find out what each wiring diagram code stands for.
Refer to the wiring diagram code in the alphabetical index to find the location (page number) of each wiring
diagram.
Code Section Wiring Diagram Name
1STSIG AT A/T 1st Signal
2NDSIG AT A/T 2nd Signal
3RDSIG AT A/T 3rd Signal
4THSIG AT A/T 4th Signal
A/C ATC Auto Air Conditioner
A/C MTC Manual Air Conditioner
ABS BRC Anti-Lock Brake System
APPS1 EC Accelerator Pedal Position Sensor
APPS2 EC Accelerator Pedal Position Sensor
APPS3 EC Accelerator Pedal Position Sensor
ASC/BS EC Automatic Speed Control Device (ASCD) Brake Switch
ASC/SW EC Automatic Speed Control Device (ASCD) Steering Switch
ASCBOF EC Automatic Speed Control Device (ASCD) Brake Switch
ASCIND DI Automatic Speed Control Device (ASCD) Indicator
AT/IND DI A/T Indicator Lamp
AUDIO AV Audio
AWD TF AWD System
BA/FTS AT A/T Fluid Temperature Sensor and TCM Power Supply
BACK/L LT Back-Up Lamp
BRK/SW EC Brake Switch
CAN AT CAN Communication Line
CAN EC CAN Communication Line
CAN LAN CAN System
CHARGE SC Charging System
CHIME DI Warning Chime
CLOCK DI Clock
COOL/F EC Cooling Fan Control
D/LOCK BL Power Door Lock
DEF GW Rear Window Defogger
DTRL LT Headlamp - With Daytime Light System
ECM/PW EC ECM Power Supply for Back-Up
ECTS EC Engine Coolant Temperature Sensor
ENGSS AT Engine Speed Signal
ETC1 EC Electric Throttle Control Function
ETC2 EC Electric Throttle Control Motor Relay
ETC3 EC Electric Throttle Control Motor
F/FOG LT Front Fog Lamp
F/PUMP EC Fuel Pump
FTS AT A/T Fluid Temperature Sensor Circuit
FTTS EC Fuel Tank Temperature Sensor
FUEL EC Fuel Injection System Function
Revision: 2005 March PG-38 2005 X-Trail
HARNESS
Code Section Wiring Diagram Name
A
HO2S1 EC Heated Oxygen Sensor 1
HO2S1H EC Heated Oxygen Sensor 1 Heater
HO2S2 EC Heated Oxygen Sensor 2 B
HO2S2H EC Heated Oxygen Sensor 2 Heater
HORN WW Horn
HSEAT SE Heated Seat C
IATS EC Intake Air Temperature Sensor
IGNSYS EC Ignition System
D
ILL LT Illumination
INJECT EC Injector
INT/L LT Map Lamp E
IVC EC Intake Valve Timing Control Solenoid Valve
KEYLES BL Remote Keyless Entry System
F
KS EC Knock Sensor
LOAD EC Electrical Load Signal
LPSV AT Line Pressure Solenoid Valve G
MAFS EC Mass Air Flow Sensor
MAIN AT Main Power Supply and Ground Circuit
H
MAIN EC Main Power Supply and Ground Circuit
METER DI Speedometer, Tachometer, Temp. and Fuel Gauges
MIL/DL EC MIL & Data Link Connector I
MIRROR GW Door Mirror
NATS BL Nissan Anti-Theft System
NONDTC AT Non-Detective Items
J
OVRCSV AT Overrun Clutch Solenoid Valve
P/SCKT WW Power Socket PG
PGC/V EC EVAP Canister Purge Volume Control Solenoid Valve
PHASE EC Camshaft Position Sensor (PHASE)
PNP/SW AT Park/Neutral Position Switch L
PNP/SW EC Park/Neutral Position Switch
POS EC Crankshaft Position Sensor (CKPS) (POS)
M
POWER PG Power Supply Routing
PRE/SE EC EVAP Control System Pressure Sensor
PS/SEN EC Power Steering Pressure Sensor
ROOM/L LT Interior Room Lamp
RP/SEN EC Refrigerant Pressure Sensor
SEAT SE Power Seat
SEN/PW EC Sensor Power Supply
SHIFT AT A/T Shift Lock System
SNOWSW EC Snow Mode Switch
SROOF RF Sunroof
SRS SRS Supplemental Restraint System
SSV/A AT Shift Solenoid Valve A
SSV/B AT Shift Solenoid Valve B
Revision: 2005 March PG-39 2005 X-Trail
HARNESS
Code Section Wiring Diagram Name
START SC Starting System
STEP/L LT Step Lamp
STOP/L LT Stop Lamp
TAIL/L LT Parking, License and Tail Lamps
TCCSIG AT A/T Tcc S/V Function (Lock-Up)
TCV AT Torque Converter Clutch Solenoid Valve
TPS AT Throttle Position Sensor
TPS1 EC Throttle Position Sensor (Sensor 1)
TPS2 EC Throttle Position Sensor (Sensor 2)
TPS3 EC Throttle Position Sensor
TURN LT Turn Signal and Hazard Warning Lamp
VDC BRC Vehicle Dynamics Control System
VEHSEC BL Vehicle Security System
VENT/V EC EVAP Canister Vent Control Valve
VIAS EC Variable Induction Air Control System
VIAS/V EC VIAS Control Solenoid Valve
VSSA/T AT Vehicle Speed Sensor A/T (Revolution Sensor)
VSSMTR AT Vehicle Speed Sensor MTR
WARN DI Warning Lamps
WINDOW GW Power Window
WIP/R WW Rear Wiper and Washer
WIPER WW Front Wiper and Washer
Revision: 2005 March PG-40 2005 X-Trail
ELECTRICAL UNITS LOCATION
ELECTRICAL UNITS LOCATION PFP:25230
A
Electrical Units Location AKS00BEZ
ENGINE COMPARTMENT
B
C
D
E
F
G
H
I
J
PG
L
M
CKIB0033E
Revision: 2005 March PG-41 2005 X-Trail
ELECTRICAL UNITS LOCATION
PASSENGER COMPARTMENT
CKIB0034E
Revision: 2005 March PG-42 2005 X-Trail
ELECTRICAL UNITS LOCATION
A
B
C
D
E
F
G
H
I
J
PG
L
M
CKIB0035E
Revision: 2005 March PG-43 2005 X-Trail
HARNESS CONNECTOR
HARNESS CONNECTOR PFP:00011
Description AKS00BF0
HARNESS CONNECTOR (TAB-LOCKING TYPE)
q The tab-locking type connectors help prevent accidental looseness or disconnection.
q The tab-locking type connectors are disconnected by pushing or lifting the locking tab(s). Refer to the fig-
ure below.
Refer to the next page for description of the slide-locking type connector.
CAUTION:
Do not pull the harness or wires when disconnecting the connector.
[Example]
SEL769DA
Revision: 2005 March PG-44 2005 X-Trail
HARNESS CONNECTOR
HARNESS CONNECTOR (SLIDE-LOCKING TYPE)
q A new style slide-locking type connector is used on certain systems and components, especially those A
related to OBD.
q The slide-locking type connectors help prevent incomplete locking and accidental looseness or discon-
nection. B
q The slide-locking type connectors are disconnected by pushing or pulling the slider. Refer to the figure
below.
CAUTION: C
q Do not pull the harness or wires when disconnecting the connector.
q Be careful not to damage the connector support bracket when disconnecting the connector.
D
[Example]
E
F
G
H
I
J
PG
L
M
SEL769V
Revision: 2005 March PG-45 2005 X-Trail
ELECTRICAL UNITS
ELECTRICAL UNITS PFP:00011
Terminal Arrangement AKS00BF1
CKIB0036E
Revision: 2005 March PG-46 2005 X-Trail
STANDARDIZED RELAY
STANDARDIZED RELAY PFP:00011
A
Description AKS00BF2
NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS
Relays can mainly be divided into three types: normal open, normal closed and mixed type relays. B
C
D
E
F
G
SEL881H
H
TYPE OF STANDARDIZED RELAYS
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