battery INFINITI QX4 2005 Factory Service Manual

LT-150
INTERIOR ROOM LAMP
Revision: October 20052005 QX56
All Interior Room Lamps Do Not OperateEKS00BBG
1. CHECK POWER SUPPLY CIRCUIT
1. All interior room lamp switches are OFF.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector M20 terminal
56 (R/G) and ground.
OK or NG
OK >> Repair harness or connector. In a case of making a
short circuit, be sure to disconnect battery negative
cable after repairing harness, and then reconnect.
NG >> Replace BCM. Refer to BCS-20, "
Removal and Installa-
tion of BCM" .
Ignition Keyhole Illumination Control Does Not OperateEKS00BBH
1. CHECK EACH SWITCH
Select "BCM" on CONSULT-II. With "INT LAMP" data monitor, make
sure switches listed in display item list turn ON-OFF linked with
switch operation. Refer to LT-146, "
Display Item List" for switches
and their functions.
OK or NG
OK >> GO TO 2.
NG >> Inspect malfunctioning switch system.
2. ACTIVE TEST
1. Select "BCM" on CONSULT-II. Select "INT LAMP".
2. Select "IGN ILLUM" active test to make sure lamp operates.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "Removal and Installa-
tion of BCM" .
NG >> GO TO 3.
3. CHECK IGNITION KEYHOLE ILLUMINATION INPUT
1. Check voltage between ignition keyhole illumination harness
connector M150 terminal + (R/G) and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 6.56 (R/G) - Ground : Battery voltage should exist.
WKIA1486E
SKIA5930E
Ignition keyhole illumination should turn ON.
SKIA3992E
+ (R/G) - Ground : Battery voltage should exist.
WKIA1909E

LT-154
ILLUMINATION
Revision: October 20052005 QX56

to power liftgate switch terminal 4

to front room/map lamp assembly (console box illumination) terminal 8

to AV switch terminal 4

to hazard switch terminal 4

to audio unit terminal 7

to rear sonar system OFF switch terminal 4

to 4WD switch terminal 8 (with 4-wheel drive)

to front air control terminal 24

to rear power vent window switch terminal 6

to DVD player terminal 10 (with DVD entertainment system)

to pedal adjusting switch terminal 6

to A/T device terminal 12

to front heated seat switch LH and RH terminal 6

to VDC OFF switch terminal 4

to tow mode switch terminal 4

to headlamp aiming switch terminal 4 (with headlamp aiming control)

to clock terminal 4 and

to combination meter terminal 18.
Ground is supplied

to illumination control switch terminal 3

to glove box lamp terminal –

to display control unit terminal 3

to rear heated seat switches terminal 6

to electric brake (pre-wiring) terminal 1 and

to compass and thermometer terminal 7

through grounds M57, M61 and M79, and

to NAVI control unit terminal 30

to rear air control terminal 3 and

to rear audio remote control unit terminal 15

through grounds B117 and B132.
With power and ground supplied, illumination lamps illuminate.
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 1ST or 2ND position (or if auto light system is acti-
vated), and the ignition switch is turned from ON or ACC to OFF, the battery saver control function is activated.
Under this condition, the illumination lamps remain illuminated for 5 minutes, then the illumination lamps are
turned off.
When the lighting switch is turned from OFF to 1ST or 2ND position (or if auto light system is activated) after
illumination lamps are turned off by the battery saver control, the illumination lamps illuminate again.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionEKS00BBK
Refer to LAN-5, "CAN COMMUNICATION" .

MA-6
GENERAL MAINTENANCE
Revision: October 20052005 QX56
UNDER THE HOOD AND VEHICLE
The maintenance items listed here should be checked periodically (e.g. each time you check the engine oil or refuel).BrakesCheck that the brake does not pull the vehicle to one side when applied. —
Brake pedal and
boosterCheck the pedal for smooth operation and make sure it has the proper distance
under it when depressed fully. Check the brake booster function. Keep the floor
mats away from the pedal.BR-6, "
Inspection and
Adjustment", BR-16,
"On-Vehicle Service"
Parking brakeCheck that the parking brake control has the proper travel and make sure that
the vehicle is held securely on a fairly steep hill when only the parking brake is
applied.PB-3, "On-Vehicle Ser-
vice"
Automatic transmis-
sion “Park” mecha-
nismOn a fairly steep hill check that the vehicle is held securely with the selector
lever in the P position without applying the brakes. — ItemReference page
ItemReference page
Windshield washer
fluidCheck that there is adequate fluid in the tank.
—
Engine coolant levelCheck the coolant level when the engine is cold.MA-13
Radiator and hosesCheck the front of the radiator and clean off any dirt, insects, leaves, etc., that
may have accumulated. Make sure the hoses have no cracks, deformation,
deterioration or loose connections.—
Brake fluid levelMake sure that the brake fluid level is between the “MAX” and “MIN” lines on the
reservoirsMA-28
BatteryCheck the fluid level in each cell. It should be between the “MAX” and “MIN”
lines. Vehicles operated in high temperatures or under severe conditions require
frequent checks of the battery fluid level.—
Engine drive beltMake sure that no belt is frayed, worn, cracked or oily.MA-13
Engine oil levelCheck the level on the dipstick after parking the vehicle on a level spot and turn-
ing off the engine.MA-17
Power steering fluid
level and linesCheck the level on the reservoir with the engine off. Check the lines for improper
attachment, leaks, cracks, etc.MA-29
Automatic transmis-
sion fluid levelCheck the level on the dipstick after putting the selector lever in “P” with the
engine idling.MA-22
Exhaust systemMake sure there are no loose supports, cracks or holes. If the sound of the
exhaust seems unusual or there is a smell of exhaust fumes, immediately locate
the trouble and correct it.MA-22
UnderbodyThe underbody is frequently exposed to corrosive substances such as those
used on icy roads or to control dust. It is very important to remove these sub-
stances, otherwise rust will form on the floor pan, frame, fuel lines and around
the exhaust system. At the end of winter, the underbody should be thoroughly
flushed with plain water, being careful to clean those areas where mud and dirt
can easily accumulate.—
Fluid leaksCheck under the vehicle for fuel, oil, water or other fluid leaks after the vehicle
has been parked for a while. Water dripping from the air conditioner after use is
normal. If you should notice any leaks or gasoline fumes are evident, check for
the cause and correct it immediately.—

PG-1
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
CONTENTS
C
D
E
F
G
H
I
J
L
M
SECTION PG
A
B
PG
Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
POWER SUPPLY ROUTING CIRCUIT ...................... 4
Schematic ................................................................ 4
Wiring Diagram — POWER — ................................. 6
BATTERY POWER SUPPLY — IGNITION SW.
IN ANY POSITION ................................................ 6
ACCESSORY POWER SUPPLY — IGNITION
SW. IN ACC OR ON .............................................11
IGNITION POWER SUPPLY — IGNITION SW.
IN ON .................................................................. 12
IGNITION POWER SUPPLY — IGNITION SW.
IN ON AND/OR START ....................................... 13
IPDM E/R (INTELLIGENT POWER DISTRIBUTION
MODULE ENGINE ROOM) ...................................... 17
System Description ................................................ 17
SYSTEMS CONTROLLED BY IPDM E/R ........... 17
CAN COMMUNICATION LINE CONTROL ......... 17
IPDM E/R STATUS CONTROL ........................... 18
CAN Communication System Description .............. 18
Function of Detecting Ignition Relay Malfunction ... 18
CONSULT-II Function IPDM E/R ............................ 19
CONSULT-II BASIC OPERATION ...................... 19
SELF-DIAGNOSTIC RESULTS .......................... 20
DATA MONITOR ................................................. 20
ACTIVE TEST ..................................................... 21
Auto Active Test ..................................................... 22
DESCRIPTION .................................................... 22
OPERATION PROCEDURE ............................... 22
INSPECTION IN AUTO ACTIVE TEST MODE ... 22
Schematic .............................................................. 24
IPDM E/R Terminal Arrangement ........................... 25
IPDM E/R Power/Ground Circuit Inspection .......... 26
Inspection with CONSULT-II (Self-Diagnosis) ........ 27
Removal and Installation of IPDM E/R ................... 28
REMOVAL ........................................................... 28
INSTALLATION ................................................... 28GROUND CIRCUIT ................................................... 29
Ground Distribution ................................................. 29
MAIN HARNESS ................................................. 29
ENGINE ROOM HARNESS ................................ 32
ENGINE CONTROL HARNESS .......................... 35
BODY HARNESS ................................................ 36
BODY NO. 2 HARNESS ..................................... 37
BACK DOOR NO. 2 RH HARNESS .................... 38
HARNESS ................................................................. 39
Harness Layout ...................................................... 39
HOW TO READ HARNESS LAYOUT ................. 39
OUTLINE ............................................................. 40
MAIN HARNESS ................................................. 41
ENGINE ROOM HARNESS (LH VIEW) .............. 43
ENGINE ROOM HARNESS (RH VIEW) ............. 46
ENGINE CONTROL HARNESS .......................... 48
CHASSIS HARNESS .......................................... 50
BODY HARNESS ................................................ 52
BODY NO. 2 HARNESS ..................................... 54
ROOM LAMP HARNESS .................................... 56
FRONT DOOR LH HARNESS ............................ 57
FRONT DOOR RH HARNESS ............................ 57
REAR DOOR LH HARNESS ............................... 58
REAR DOOR RH HARNESS .............................. 58
BACK DOOR HARNESS .................................... 59
Wiring Diagram Codes (Cell Codes) ...................... 60
ELECTRICAL UNITS LOCATION ............................ 63
Electrical Units Location ......................................... 63
ENGINE COMPARTMENT .................................. 63
PASSENGER COMPARTMENT ......................... 64
Fuse ........................................................................ 66
Fusible Link ............................................................ 66
Circuit Breaker (Built Into BCM) ............................. 66
HARNESS CONNECTOR ......................................... 67
Description .............................................................. 67
HARNESS CONNECTOR (TAB-LOCKING
TYPE) .................................................................. 67
HARNESS CONNECTOR (SLIDE-LOCKING
TYPE) .................................................................. 68
HARNESS CONNECTOR (LEVER LOCKING

PG-6
POWER SUPPLY ROUTING CIRCUIT
Revision: October 20052005 QX56
Wiring Diagram — POWER —EKS00BN1
BATTERY POWER SUPPLY — IGNITION SW. IN ANY POSITION
WKWA2618E

PG-26
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: October 20052005 QX56
IPDM E/R Power/Ground Circuit InspectionEKS00BN9
1. FUSE AND FUSIBLE LINK INSPECTION
Check that the following fusible links or IPDM E/R fuses are not blown.
OK or NG
OK >> GO TO 2.
NG >> Replace fuse or fusible link.
2. POWER CIRCUIT INSPECTION
1. Disconnect IPDM E/R harness connector E118.
2. Check voltage between IPDM E/R harness connector E118 terminals 1 (B/Y), 2 (R) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace IPDM E/R power circuit harness.
3. GROUND CIRCUIT INSPECTION
1. Disconnect IPDM E/R harness connectors E122 and E124.
2. Check continuity between IPDM E/R harness connector E122
terminal 38 (B), and E124 terminal 59 (B) and ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace ground circuit harness of IPDM E/R.
Terminal No. Signal name Fuse, fusible link No.
1, 2, 22 Battery power a, c, d, e, l
Battery voltage should exist.
SKIA1987E
Continuity should exist.
WKIA1453E

PG-28
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: October 20052005 QX56
Removal and Installation of IPDM E/REKS00BNB
REMOVAL
1. Disconnect negative battery cable.
2. Remove IPDM E/R upper cover.
3. Release 2 clips and pull IPDM E/R up from case.
4. Disconnect IPDM E/R connectors and remove the IPDM E/R.
INSTALLATION
Installation is in the reverse order of removal.
WKIA1454E
WKIA1696E

RF-2
PRECAUTIONS
Revision: October 20052005 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EIS004VI
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.
WAR NIN 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.

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.

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 EIS004VJ

Disconnect both battery cables in advance.

Never tamper with or force air bag lid open, as this may adversely affect air bag performance.

Be careful not to scratch pad and other parts.

When removing or disassembling any part, be careful not to damage or deform it. Protect parts which may
get in the way with cloth.

When removing parts with a screwdriver or other tool, protect parts by wrapping them with vinyl or tape.

Keep removed parts protected with cloth.

If a clip is deformed or damaged, replace it.

If an unreusable part is removed, replace it with a new one.

Tighten bolts and nuts firmly to the specified torque.

After re-assembly has been completed, make sure each part functions correctly.

Remove stains in the following way.
Water-soluble stains:
Dip a soft cloth in warm water, and then squeeze it tightly. After wiping the stain, wipe with a soft dry cloth.
Oil stain:
Dissolve a synthetic detergent in warm water (density of 2 to 3% or less), dip the cloth, then clean off the stain
with the cloth. Next, dip the cloth in fresh water and squeeze it tightly. Then clean off the detergent completely.
Then wipe the area with a soft dry cloth.

Do not use any organic solvent, such as thinner or benzine.

SUNROOF
RF-11
C
D
E
F
G
H
J
K
L
MA
B
RF
Revision: October 20052005 QX56
TILT UP OPERATION
When the tilt switch is operated for tilt up, ground is supplied

to sunroof motor assembly terminal 4

through sunroof switch terminal 4

through sunroof switch terminal 2

through sunroof motor assembly terminal 8

through grounds M57, M61 and M79.
Then, the sunroof will tilt up.
TILT DOWN OPERATION
When the tilt switch is operated for tilt down, ground is supplied

to sunroof motor assembly terminal 10

through sunroof switch terminal 6

through sunroof switch terminal 2

through sunroof motor assembly terminal 8

through grounds M57, M61 and M79.
Then, the sunroof will tilt down.
SLIDE OPEN OPERATION
When the switch is operated for slide open, ground is supplied

to sunroof motor assembly terminal 9

through sunroof switch terminal 3

through sunroof switch terminal 2

through sunroof motor assembly terminal 8

through grounds M57, M61 and M79.
Then, the sunroof will slide open.
SLIDE CLOSE OPERATION
When the switch is operated for slide close, ground is supplied

to sunroof motor assembly terminal 3

through sunroof switch terminal 1

through sunroof switch terminal 2

through sunroof motor assembly terminal 8

through grounds M57, M61 and M79.
Then, the sunroof will slide closed.
RETAINED POWER OPERATION
When the ignition switch is turned to OFF position from ON or START position, power is supplied for 45 sec-
onds.
The retained power operation is canceled when the driver or passenger side door is opened.
RAP signal period can be changed by CONSULT-II. Refer to RF-16, "
CONSULT-II Function (BCM)" .
MEMORY RESET PROCEDURE
If the battery is disconnected, or the sunroof motor harness connector is disconnected, the slide switch will
become inoperable and the sunroof motor memory must be reset. To reset the sunroof motor memory from
any sunroof position (full open, partially open, closed, partially vented, and vented), push and hold the sunroof
tilt switch in the forward (DOWN) position until the sunroof is fully closed. After it has closed all the way, push
and hold the tilt switch forward (DOWN) for more than 2 seconds to re-establish the motor preset position. The
sunroof should now operate normally.
INTERRUPTION DETECTION FUNCTION
The CPU (central processing unit) monitors the sunroof motor operation and the sunroof position (fully-closed
or other) by the signals from the sunroof motor.
When sunroof motor detects an interruption during the following sliding close operations, sunroof switch con-
trols the motor for open and the sunroof will operate until it reaches full open position.

SUNROOF
RF-15
C
D
E
F
G
H
J
K
L
MA
B
RF
Revision: October 20052005 QX56
Terminals and Reference Values for BCMEIS004VT
Terminals and Reference Values for Sunroof Motor AssemblyEIS004VU
Work FlowEIS004VV
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to RF-10, "
System Description" .
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction.
Refer to RF-17, "
Trouble Diagnosis Chart by Symptom" .
4. Does sunroof system operate normally? If Yes, GO TO 5, If No, GO TO 3.
5. Inspection End.
Terminal Wire Color Item ConditionVoltage
(Approx.)
12 R/L Front door switch RH signalON (Open) 0
OFF (Close) Battery voltage
38 W/L Ignition power supply Ignition switch ON Battery voltage
47 SB Front door switch LH signalON (Open) 0
OFF (Close) Battery voltage
67 B Ground — —
68 W/L RAP signalIgnition switch ON Battery voltage
Within 45 second after ignition switch is turned
OFF Battery voltage
When front door LH or RH is open while
retained power is operating0
69 W/R Power window power supply — Battery voltage
70 W/B BAT power supply — Battery voltage
Terminal Wire Color Item ConditionVo ltag e
(Approx.)
1 W/L RAP signalIgnition switch ON Battery voltage
Within 45 second after ignition switch is
turned OFFBattery voltage
When front door LH or RH is open while
retained power is operating0
3 P/W Sunroof switch CLOSE signalIgnition switch ON and sunroof switch
CLOSE position0
Other than above Battery voltage
4 O Sunroof switch TILT UP signalIgnition switch ON and sunroof switch in
TILT UP position0
Other than above Battery voltage
5 W/R BAT power supply — Battery voltage
7 B Ground — —
8 Y Ground signal — —
9 P Sunroof switch OPEN signalIgnition switch ON and sunroof switch
OPEN position0
Other than above Battery voltage
10 L/R Sunroof switch TILT DOWN signalIgnition switch ON and sunroof switch in
TILT DOWN position0
Other than above Battery voltage