battery replacement INFINITI QX4 2005 Factory Service Manual

BL-2Revision: October 20052005 QX56 BCM Power Supply and Ground Circuit Check ...... 59
Trouble Diagnoses .................................................. 60
SYMPTOM CHART ............................................. 60
Key Switch (Insert) Check ...................................... 62
Door Switch Check ................................................. 63
Keyfob Battery and Function Check ....................... 65
Remote Keyless Entry Receiver System Check ..... 66
ACC Power Check .................................................. 68
IPDM E/R Operation Check .................................... 68
Check Hazard Function .......................................... 70
Check Horn Function .............................................. 70
Check Headlamp Function ..................................... 70
Check Map Lamp Illumination Function ................. 70
ID Code Entry Procedure ....................................... 71
KEYFOB ID SET UP WITH CONSULT-II ............ 71
KEYFOB ID SET UP WITHOUT CONSULT-II ..... 73
Keyfob Battery Replacement .................................. 74
VEHICLE SECURITY (THEFT WARNING) SYSTEM ... 75
Component Parts and Harness Connector Location ... 75
System Description ................................................. 76
DESCRIPTION .................................................... 76
POWER SUPPLY AND GROUND CIRCUIT ....... 77
INITIAL CONDITION TO ACTIVATE THE SYS-
TEM ..................................................................... 77
VEHICLE SECURITY SYSTEM ALARM OPER-
ATION .................................................................. 77
VEHICLE SECURITY SYSTEM DEACTIVATION ... 78
PANIC ALARM OPERATION ............................... 78
CAN Communication System Description .............. 78
Schematic ............................................................... 79
Wiring Diagram — VEHSEC — .............................. 80
............................................................................. 80
............................................................................. 81
............................................................................. 82
............................................................................. 83
............................................................................. 84
Terminals and Reference Value for BCM ................ 85
Terminals and Reference Value for IPDM E/R ........ 86
CONSULT-II Function (BCM) .................................. 86
CONSULT-II INSPECTION PROCEDURE .......... 86
CONSULT-II APPLICATION ITEM ....................... 88
Trouble Diagnosis ................................................... 89
WORK FLOW ...................................................... 89
Preliminary Check .................................................. 90
Symptom Chart ....................................................... 91
Door Switch Check ................................................. 92
Hood Switch Check ................................................ 94
Combination Meter (Security Indicator Lamp)
Check ..................................................................... 95
Front Door Lock Assembly LH (Key Cylinder Switch)
Check ..................................................................... 96
Vehicle Security Horn Alarm Check ........................ 98
Vehicle Security Headlamp Alarm Check ............... 98
Door Lock/Unlock Switch Check ............................ 98
AUTOMATIC BACK DOOR SYSTEM ....................... 99
Component Parts and Harness Connector Location ... 99
System Description ...............................................100
OPERATION DESCRIPTION ............................100
Schematic .............................................................105Wiring Diagram — B/CLOS — .............................. 106
Terminals and Reference Value for Back Door Con-
trol Unit .................................................................. 111
Terminals and Reference Value for BCM ..............112
Trouble Diagnosis Procedure ................................113
Self-Diagnosis Procedures ...................................113
INPUT SIGNAL CHECK MODE .........................113
OPERATING CHECK MODE .............................113
Diagnosis Chart ....................................................114
Back Door Power Supply and Ground Circuit
Inspection ..............................................................115
Power Liftgate Switch System Inspection .............116
GLASS HATCH AJAR SWITCH CHECK ...........117
Back Door Close (Close) Switch System Inspection .118
Back Door Close (Cancel) Switch System Inspec-
tion ........................................................................119
Pinch Strip System Inspection .............................. 121
Back Door Warning Chime System Inspection ..... 122
Half-Latch Switch System Inspection .................... 122
Open Switch System Inspection ........................... 123
Close Switch System Inspection ........................... 124
Back Door Handle Switch System Inspection ....... 125
Cinch Latch Motor System Inspection .................. 126
DOOR ...................................................................... 128
Fitting Adjustment ................................................. 128
FRONT DOOR ................................................... 128
REAR DOOR ..................................................... 128
STRIKER ADJUSTMENT .................................. 128
Removal and Installation ....................................... 129
FRONT DOOR ................................................... 129
REAR DOOR ..................................................... 129
BACK DOOR ..................................................... 130
FRONT DOOR LOCK .............................................. 131
Component Structure ............................................ 131
Removal and Installation ....................................... 131
REMOVAL .......................................................... 131
INSTALLATION .................................................. 133
Disassembly and Assembly .................................. 133
DOOR KEY CYLINDER ASSEMBLY ................. 133
REAR DOOR LOCK ................................................ 134
Component Structure ............................................ 134
Removal and Installation ....................................... 134
REMOVAL .......................................................... 134
INSTALLATION .................................................. 134
BACK DOOR LOCK ................................................ 135
Power Back Door Opener ..................................... 135
REMOVAL ......................................................... 135
INSTALLATION ................................................. 135
Door Lock Assembly ............................................. 136
REMOVAL ......................................................... 136
INSTALLATION ................................................. 136
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ...................................................................... 137
Component Parts and Harness Connector Location . 137
System Description ............................................... 138
System Composition ............................................. 138
ECM Re-communicating Function ........................ 139
Wiring Diagram — NATS — .................................. 140
Terminals and Reference Value for BCM .............. 141

BL-74
REMOTE KEYLESS ENTRY SYSTEM
Revision: October 20052005 QX56
NOTE:

If a keyfob is lost, the ID code of the lost keyfob must be erased to prevent unauthorized use. A specific ID
code can be erased with CONSULT-II. However, when the ID code of a lost keyfob is not known, all con-
troller ID codes should be erased. After all ID codes are erased, the ID codes of all remaining and/or new
keyfobs must be re-registered.
To erase all ID codes in memory, register one ID code (keyfob) five times. After all ID codes are erased,
the ID codes of all remaining and/or new keyfobs must be re-registered.

When registering an additional keyfob, the existing ID codes in memory may or may not be erased. If five
ID codes are stored in memory, when an additional code is registered, only the oldest code is erased. If
less than five ID codes are stored in memory, when an additional ID code is registered, the new ID code is
added and no ID codes are erased.

If you need to activate more than two additional new keyfobs, repeat the procedure “Additional ID code
entry” for each new keyfob.

Entry of maximum five ID codes is allowed. When more than five ID codes are entered, the oldest ID code
will be erased.

Even if same ID code that is already in the memory is input, the same ID code can be entered. The code
is counted as an additional code.
Keyfob Battery ReplacementEIS008QK
LIIA1514E

EC-358Revision: October 2005
DTC P0456 EVAP CONTROL SYSTEM
2005 QX56
CAUTION:

Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used,
the MIL may come on.

If the fuel filler cap is not tightened properly, the MIL may come on.

Use only a genuine NISSAN rubber tube as a replacement.
DTC Confirmation ProcedureUBS00H5U
NOTE:

If DTC P0456 is displayed with P0442, first perform trouble diagnosis for DTC P0456.

After repair, make sure that the hoses and clips are installed properly.

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.
TESTING CONDITION:

Open engine hood before conducting following procedure.

If any of following conditions are met just before the DTC confirmation procedure, leave the vehi-
cle for more than 1 hour.
–Fuel filler cap is removed.
–Fuel is refilled or drained.
–EVAP component parts is/are removed.

Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-II.
2. Make sure the following conditions are met.
FUEL LEVEL SE: 0.25 - 1.4V
COOLAN TEMP/S: 0 - 32°C (32 - 90°F)
FUEL T/TMP SE: 0 - 35°C (32 - 95°F)
INT/A TEMP SE: More than 0°C (32°F)
If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle) or refilling/draining
fuel until the output voltage condition of the “FUEL LEVEL SE” meets within the range above and leave
the vehicle for more than 1 hour. Then start from step 1).
3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
4. Select “EVAP V/S LEAK P0456/P1456” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-II.
Follow the instruction displayed.
5. Make sure that “OK” is displayed.
If “NG” is displayed, refer to EC-360, "
Diagnostic Procedure" .
NOTE:

If the engine speed cannot be maintained within the range displayed on CONSULT-II screen, go
to EC-72, "
Basic Inspection" .

Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid
valve properly.
PBIB0837E

CAMSHAFT
EM-51
C
D
E
F
G
H
I
J
K
L
MA
EM
Revision: October 20052005 QX56
5. Install the camshaft sprockets using the following procedure:
a. Install the camshaft sprockets aligning them with the matching
marks painted on the timing chain when removed. Align the
camshaft sprocket key groove with the dowel pin on the cam-
shaft front edge at the same time. Then temporarily tighten
bolts.

Install the intake and exhaust side camshaft sprockets by
selectively using the groove of the dowel pin according to the
bank. (Common part used for both banks.)
b. Lock the hexagonal part of the camshaft in the same way as for
removal, and tighten the bolts.
c. Check again that the timing mating mark on the timing chain and
on each sprocket are aligned.
6. Install the chain tensioner using the following procedure:
NOTE:
Left bank is shown.
a. Install the chain tensioner.

Compress the plunger and hold it using a stopper pin when
installing.

Loosen the slack guide side timing chain by rotating the cam-
shaft hexagonal part if mounting space is small.
b. Remove the stopper pin and release the plunger, and then apply
tension to the timing chain.
c. Install the chain tensioner cover onto the front cover (RH bank).

Apply liquid gasket as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-45, "
Recommended Chemical Products and Sealants"
.
7. Check and adjust valve clearances. Refer to EM-51, "
Va l v e
Clearance" .
8. Installation of the remaining components is in the reverse order
of removal.
Valv e C le aranceEBS00LMA
INSPECTION
NOTE:
Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts,
or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or
noise).
1. Warm up the engine. Then stop the engine.
2. Remove the engine cover, battery cover and air duct assembly. Refer to EM-11, "
Removal and Installa-
tion" , SC-9, "REMOVAL" and EM-14, "Removal and Installation" .
KBIA2482E
KBIA2480E
Chain tensioner bolts : 6.9 N·m (0.70 kg-m, 61 in-lb)
Tensioner cover bolts : 9.0 N·m (0.92 kg-m, 80 in-lb)KBIA2479E
KBIA2547E

GI-1
GENERAL INFORMATION
A GENERAL INFORMATION
CONTENTS
C
D
E
F
G
H
I
J
K
L
MB
GI
SECTION GI
Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 3
Description ............................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS) (If
Equipped) ................................................................. 3
General Precautions ................................................ 4
Precautions for Three Way Catalyst ......................... 5
Precautions for Fuel (Unleaded Regular Gasoline
Recommended) ........................................................ 5
Precautions for Multiport Fuel Injection System or
Engine Control System ............................................ 6
Precautions for Hoses .............................................. 6
HOSE REMOVAL AND INSTALLATION ............... 6
HOSE CLAMPING ................................................ 6
Precautions for Engine Oils ...................................... 7
HEALTH PROTECTION PRECAUTIONS ............. 7
ENVIRONMENTAL PROTECTION PRECAU-
TIONS ................................................................... 7
Precautions for Air Conditioning ............................... 7
HOW TO USE THIS MANUAL ................................... 8
Description ............................................................... 8
Terms ....................................................................... 8
Units ......................................................................... 8
Contents ................................................................... 8
Relation between Illustrations and Descriptions ...... 9
Components ............................................................. 9
SYMBOLS ........................................................... 10
How to Follow Trouble Diagnoses ...........................11
DESCRIPTION .....................................................11
HOW TO FOLLOW TEST GROUPS IN TROU-
BLE DIAGNOSES ................................................11
HARNESS WIRE COLOR AND CONNECTOR
NUMBER INDICATION ....................................... 12
KEY TO SYMBOLS SIGNIFYING MEASURE-
MENTS OR PROCEDURES ............................... 13
How to Read Wiring Diagrams ............................... 15
CONNECTOR SYMBOLS ................................... 15SAMPLE/WIRING DIAGRAM - EXAMPL - .......... 16
DESCRIPTION .................................................... 17
Abbreviations .......................................................... 22
SERVICE INFORMATION FOR ELECTRICAL INCI-
DENT ......................................................................... 24
How to Check Terminal ........................................... 24
CONNECTOR AND TERMINAL PIN KIT ............ 24
HOW TO PROBE CONNECTORS ...................... 24
How to Perform Efficient Diagnosis for an Electrical
Incident ................................................................... 27
WORK FLOW ...................................................... 27
INCIDENT SIMULATION TESTS ........................ 27
CIRCUIT INSPECTION ....................................... 30
Control Units and Electrical Parts ........................... 35
PRECAUTIONS .................................................. 35
CONSULT-II CHECKING SYSTEM .......................... 37
Description .............................................................. 37
Function and System Application ........................... 37
Nickel Metal Hydride Battery Replacement ............ 38
Checking Equipment .............................................. 38
CONSULT-II Start Procedure .................................. 38
CONSULT-II Data Link Connector (DLC) Circuit .... 39
INSPECTION PROCEDURE .............................. 39
LIFTING POINT ......................................................... 40
Pantograph Jack ..................................................... 40
Garage Jack and Safety Stand ............................... 40
2-Pole Lift ............................................................... 41
TOW TRUCK TOWING ............................................. 42
Tow Truck Towing ................................................... 42
2WD MODELS .................................................... 42
4WD MODELS .................................................... 43
Vehicle Recovery (Freeing a stuck vehicle) ............ 43
TIGHTENING TORQUE OF STANDARD BOLTS .... 44
Tightening Torque Table ......................................... 44
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS ............................................................... 45
Recommended Chemical Products and Sealants ... 45
IDENTIFICATION INFORMATION ............................ 46
Model Variation ....................................................... 46
Identification Number .............................................. 47

GI-38
CONSULT-II CHECKING SYSTEM
Revision: October 20052005 QX56
Nickel Metal Hydride Battery Replacement EAS001XT
CONSULT-II contains a nickel metal hydride battery. When replacing the battery obey the following:
WAR NIN G:
Replace the nickel metal hydride battery with Genuine CONSULT-II battery only. Use of another bat-
tery may present a risk of fire or explosion. The battery may present a fire or chemical burn hazard if
mistreated. Do not recharge, disassemble or dispose of in fire.
Keep the battery out of reach of children and discard used battery conforming to the local regulations.
Checking EquipmentEAS001XU
When ordering the below equipment, contact your NISSAN distributor.
CAUTION:

Previous CONSULT-II “I” and “Y” DLC-I and DLC-II cables should NOT be used anymore because
their DDL connector pins can be damaged during cable swapping.

If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self- diagnosis depending on control unit which carries out CAN communication.

If CONSULT-II CONVERTER is not connected with CONSULT-II, the vehicle enters “FAIL SAFE
MODE” which will “LIGHT UP the HEAD LIGHT” and /or “COOLING FAN ROTATING” when CON-
SULT-II is started.
NOTE:

The CONSULT-II must be used in conjunction with a program card.
CONSULT-II does not require loading (Initialization) procedure.

Be sure the CONSULT-II is turned OFF before installing or removing a program card.
CONSULT-II Start ProcedureEAS001XV
NOTE:
Turning ignition switch off when performing CAN diagnosis could cause CAN memory to be erased.
1. Connect CONSULT-II and CONSULT-II CONVERTER to the
data link connector.
Tool name Description
NISSAN CONSULT-II (J-44200)
1. CONSULT-II unit (Tester internal soft: Resident
Version 3.4.0) and accessories.
2. Program card UED05B-1 and AEN04A-1 (for
NATS) or later, to confirm the best combination
of these software, refer to CONSULT-II Opera-
tion Manual.
3. CONSULT-II CONVERTER.
4. "CONSULT-II pigtail" cable.
SAIA0363E
PAIA0070E

IDX-2
ALPHABETICAL INDEX
Numerics
2-4WD shift solenoid valve ..... TF-94
, TF-152, TF-165
4WD - Wiring diagram ....................................... TF-24
4WD shift switch ................................................ TF-66
4WD solenoid valve ................ TF-90, TF-152, TF-165
4WD system description .................................... TF-15
4WD system diagram ........................................ TF-19
A
A/C air flow ...................................................... ATC-29
A/C compressor clutch removal and installation .. ATC-
180
A/C compressor mounting ............................. ATC-179
A/C compressor precaution ............................. ATC-11
A/C compressor special service tool ................ ATC-14
A/C control operation (auto A/C) ...................... ATC-26
A/C diagnostic work flow (auto A/C) .............. ATC-132
A/C evaporator ............................................... ATC-186
A/C HFC134a (R134a) system identification ..... ATC-7
A/C HFC134a (R134a) system precaution ........ ATC-5
A/C HFC134a (R134a) system service procedure ATC-
175
A/C HFC134a (R134a) system service tools ... ATC-14
A/C HFC134a system service equipment precaution ...
ATC-11
A/C lubricant (R134a) ...................................... ATC-22
A/C lubrication oil ............................................. ATC-22
A/C operational check ....................... ATC-57, ATC-60
A/C self-diagnoses (auto A/C) ........ ATC-55, ATC-132
A/C service data specification ........................ ATC-193
A/C trouble diagnoses (auto A/C) .................... ATC-33
A/C, A - Wiring diagram ................................... ATC-43
A/T fluid checking ...................... AT-13, AT-50, MA-22
A/T fluid cooler cleaning .................................... AT-13
A/T fluid replacement ............................. AT-13, MA-24
A/T fluid temperature sensor ........................... AT-126
A/T IND - Wiring diagram .................................... DI-40
A/T indicator ........................................................ DI-40
A/T shift lock system ........................................ AT-222
A/T trouble diagnoses ........................................ AT-41
A/T Wiring diagram AT - CAN ............................ AT-96
A/T Wiring diagram AT - FTS .......................... AT-127
A/T Wiring diagram AT - MAIN ........................ AT-168
A/T Wiring diagram AT - NONDTC .................. AT-177
A/T Wiring diagram AT - PNP/SW ................... AT-105
A/T Wiring diagram AT - STSIG ...................... AT-100
A/T Wiring diagram AT - VSS A/T ................... AT-110
ABS - Wiring diagram ..................................... BRC-16
ABS (anti-lock brake system) ........................... BRC-7
Accelerator control system ............................... ACC-2
Accelerator pedal position (APP) sensor . EC-591, EC-
597, EC-611
Accelerator pedal released position learning ..... EC-90
AF1B1-Wiring diagram EC-461, EC-470, EC-479, EC-
489, EC-500, EC-510, EC-522
AF1B2-Wiring diagram EC-463, EC-472, EC-481, EC-
491, EC-502, EC-512, EC-524
AF1HB1-Wiring diagram ................................. EC-387
AF1HB2-Wiring diagram ................................. EC-389
Aiming adjustment .................................. LT-30, LT-78
Air bag ............................................................... SRS-3
Air cleaner and air duct ..................................... EM-14
Air cleaner filter replacement ............................ MA-16
Air conditioner cut control ................................. EC-28
Air flow meter - See Mass air flow sensor EC-174, EC-
183
Air fuel ratio sensor 1 .. EC-459, EC-468, EC-477, EC-
487, EC-497, EC-507, EC-519
Air fuel ratio sensor 1 heater ........................... EC-386
Air mix. door motor .......................................... ATC-70
Ambient sensor ............................. ATC-137, ATC-148
Angular tightening application ............................. EM-3
APPS1 - Wiring diagram ................................. EC-593
APPS2 - Wiring diagram ................................. EC-599
APPS3 - Wiring diagram ................................. EC-613
ASC/BS - Wiring diagram ............................... EC-571
ASC/SW - Wiring diagram .............................. EC-554
ASCBOF - Wiring diagram .............................. EC-658
ASCD ................................................................ EC-29
ASCD (automatic speed control device) ........... ACS-3
ASCD brake switch ........................... EC-569, EC-657
ASCD indicator lamp ....................................... EC-664
ASCD steering switch ..................................... EC-552
ASCIND - Wiring diagram ............................... EC-665
ATP switch ............................ TF-107, TF-110, TF-115
AUDIO - Wiring diagram .................................... AV-10
AUT/DP - Wiring diagram .................................. SE-20
Auto air conditioner - Wiring diagram .............. ATC-43
Auto anti-dazzling inside mirror ........... GW-75, GW-76
Autolamp ............................................................ LT-47
Automatic amplifier ......................................... ATC-61
Automatic drive positioner .................................. SE-11
Automatic transmission number .......................... GI-48
AV and NAVI control unit ................................... AV-63
AV communication line ...................................... AV-87
B
Back door ........................................................... BL-99
Back door trim ..................................................... EI-32
Back sonar .......................................................... DI-58
BACK/L - Wiring diagram ................................. LT-106
Back-up lamp ................................................... LT-106
Ball joint (front) ................................................ FSU-15
Basic inspection ................................................ EC-72
Battery ................................................................. SC-4
Battery/Starting/Charging System Tester SC-6, SC-12,
SC-19
BCM (Body control module) .............................. BCS-3
Block heater ...................................................... EM-73
Blower motor ................................... ATC-93, ATC-152
Body alignment ................................................ BL-172
Body component parts ..................................... BL-161
Body construction ............................................ BL-171
Body exterior paint color .................................. BL-160
Body mounting ................................................. BL-159

LT-1
LIGHTING SYSTEM
K ELECTRICAL
CONTENTS
C
D
E
F
G
H
I
J
L
M
SECTION LT
A
B
LT
Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
General precautions for service operations ............. 4
Wiring Diagrams and Trouble Diagnosis .................. 4
HEADLAMP (FOR USA) ............................................ 6
Component Parts and Harness Connector Location ..... 6
System Description .................................................. 6
OUTLINE ............................................................... 6
XENON HEADLAMP ............................................. 7
BATTERY SAVER CONTROL .............................. 8
AUTO LIGHT OPERATION ................................... 8
VEHICLE SECURITY SYSTEM (PANIC ALARM) ..... 8
CAN Communication System Description ................ 8
Schematic ................................................................ 9
Wiring Diagram — H/LAMP — ............................... 10
Terminals and Reference Values for BCM ............. 14
Terminals and Reference Values for IPDM E/R ..... 15
How to Proceed With Trouble Diagnosis ................ 15
Preliminary Check .................................................. 15
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .................................................................... 15
CONSULT-II Function (BCM) ................................. 17
CONSULT-II OPERATION .................................. 17
WORK SUPPORT ............................................... 18
DATA MONITOR ................................................. 18
ACTIVE TEST ..................................................... 19
SELF-DIAGNOSTIC RESULTS .......................... 19
CONSULT-II Function (IPDM E/R) ......................... 20
CONSULT-II OPERATION .................................. 20
DATA MONITOR ................................................. 21
ACTIVE TEST ..................................................... 21
Headlamp HI Does Not Illuminate (Both Sides) ..... 22
Headlamp HI Does Not Illuminate (One Side) ....... 24
High Beam Indicator Lamp Does Not Illuminate .... 25
Headlamp LO Does Not Illuminate (Both Sides) .... 25
Headlamp LO Does Not Illuminate (One Side) ...... 27
Headlamps Do Not Turn OFF ................................ 28
Aiming Adjustment ................................................. 30LOW BEAM AND HIGH BEAM ........................... 30
Bulb Replacement .................................................. 31
HEADLAMP (OUTER SIDE), FOR LOW BEAM ... 31
HEADLAMP (INNER SIDE), FOR HIGH BEAM ... 31
FRONT PARKING LAMP (INNER OR OUTER) ... 31
FRONT SIDE MARKER LAMP ........................... 31
Removal and Installation ........................................ 32
REMOVAL ........................................................... 32
INSTALLATION ................................................... 32
Disassembly and Assembly .................................... 32
HEADLAMP (FOR CANADA) - DAYTIME LIGHT
SYSTEM - .................................................................. 33
Component Parts and Harness Connector Location ... 33
System Description ................................................. 34
OUTLINE ............................................................. 34
DAYTIME LIGHT OPERATION ........................... 34
COMBINATION SWITCH READING FUNCTION ... 34
AUTO LIGHT OPERATION ................................. 35
CAN Communication System Description .............. 35
Schematic ............................................................... 36
Wiring Diagram — DTRL — ................................... 37
Terminals and Reference Values for BCM .............. 41
How to Proceed With Trouble Diagnosis ................ 42
Preliminary Check .................................................. 42
CHECK BCM CONFIGURATION ........................ 42
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT ............................................. 42
INSPECTION PARKING BRAKE SWITCH CIR-
CUIT .................................................................... 43
CONSULT-II Functions ........................................... 44
Daytime Light Control Does Not Operate Properly
(Normal Headlamps Operate Properly) .................. 44
Aiming Adjustment .................................................. 46
Bulb Replacement .................................................. 46
Removal and Installation ........................................ 46
Disassembly and Assembly .................................... 46
AUTO LIGHT SYSTEM ............................................. 47
Component Parts and Harness Connector Location ... 47
System Description ................................................. 48
OUTLINE ............................................................. 48

LT-2Revision: October 20052005 QX56 COMBINATION SWITCH READING FUNCTION ... 48
EXTERIOR LAMP BATTERY SAVER CONTROL ... 48
DELAY TIMER FUNCTION ................................. 48
CAN Communication System Description .............. 48
Major Components and Functions .......................... 48
Schematic ............................................................... 49
Wiring Diagram — AUTO/L — ................................ 50
Terminals and Reference Values for BCM .............. 53
Terminals and Reference Values for IPDM E/R ...... 54
How to Proceed With Trouble Diagnosis ................ 55
Preliminary Check .................................................. 55
SETTING CHANGE FUNCTIONS ....................... 55
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .................................................................... 55
CONSULT-II Function (BCM) .................................. 57
CONSULT-II OPERATION ................................... 57
WORK SUPPORT ............................................... 58
DATA MONITOR .................................................. 58
ACTIVE TEST ..................................................... 59
SELF-DIAGNOSTIC RESULTS ........................... 59
CONSULT-II Function (IPDM E/R) .......................... 60
CONSULT-II OPERATION ................................... 60
DATA MONITOR .................................................. 61
ACTIVE TEST ..................................................... 61
Trouble Diagnosis Chart by Symptom .................... 62
Lighting Switch Inspection ...................................... 62
Optical Sensor System Inspection .......................... 63
Removal and Installation of Optical Sensor ............ 64
REMOVAL ........................................................... 64
INSTALLATION .................................................... 64
HEADLAMP AIMING CONTROL .............................. 65
System Description ................................................. 65
Wiring Diagram — H/AIM — ................................... 66
Removal and Installation of Headlamp Aiming
Switch ..................................................................... 68
REMOVAL ........................................................... 68
INSTALLATION ................................................... 68
Switch Circuit Inspection ........................................ 68
FRONT FOG LAMP .................................................. 69
Component Parts and Harness Connector Location ... 69
System Description ................................................. 69
OUTLINE ............................................................. 69
COMBINATION SWITCH READING FUNCTION ... 70
EXTERIOR LAMP BATTERY SAVER CONTROL ... 70
CAN Communication System Description .............. 70
Wiring Diagram — F/FOG — .................................. 71
Terminals and Reference Values for BCM .............. 73
Terminals and Reference Values for IPDM E/R ...... 74
How to Proceed With Trouble Diagnosis ................ 74
Preliminary Check .................................................. 75
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .................................................................... 75
CONSULT-II Functions ........................................... 76
Front Fog Lamps Do Not Illuminate (Both Sides) ... 76
Front Fog Lamp Does Not Illuminate (One Side) ... 77
Aiming Adjustment .................................................. 78
Bulb Replacement .................................................. 79
Removal and Installation ........................................ 79
TURN SIGNAL AND HAZARD WARNING LAMPS ... 80Component Parts and Harness Connector Location ...80
System Description .................................................80
OUTLINE .............................................................80
TURN SIGNAL OPERATION ...............................80
HAZARD LAMP OPERATION .............................81
REMOTE KEYLESS ENTRY SYSTEM OPERA-
TION ....................................................................82
COMBINATION SWITCH READING FUNCTION ...82
CAN Communication System Description ..............82
Wiring Diagram — TURN — ...................................83
Terminals and Reference Values for BCM ..............85
How to Proceed With Trouble Diagnosis ................86
Preliminary Check ...................................................87
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .....................................................................87
CONSULT-II Function (BCM) ..................................88
CONSULT-II OPERATION ...................................88
DATA MONITOR ..................................................89
ACTIVE TEST ......................................................89
Turn Signal Lamp Does Not Operate ......................90
Rear Turn Signal Lamp Does Not Operate .............91
Hazard Warning Lamp Does Not Operate But Turn
Signal Lamps Operate ............................................92
Turn Signal Indicator Lamp Does Not Operate .......93
Bulb Replacement (Front Turn Signal Lamp) ..........94
Bulb Replacement (Rear Turn Signal Lamp) ..........94
Removal and Installation of Front Turn Signal Lamp ...94
Removal and Installation of Rear Turn Signal Lamp ...94
LIGHTING AND TURN SIGNAL SWITCH ................95
Removal and Installation .........................................95
REMOVAL ............................................................95
INSTALLATION ....................................................95
HAZARD SWITCH .....................................................96
Removal and Installation .........................................96
REMOVAL ............................................................96
INSTALLATION ....................................................96
COMBINATION SWITCH ..........................................97
Wiring Diagram — COMBSW — ............................97
Combination Switch Reading Function ...................98
CONSULT-II Function (BCM) ..................................98
CONSULT-II OPERATION ...................................98
DATA MONITOR ..................................................99
Combination Switch Inspection ............................. 100
Removal and Installation ....................................... 102
Switch Circuit Inspection ....................................... 102
STOP LAMP ............................................................ 103
System Description ............................................... 103
Wiring Diagram — STOP/L — .............................. 104
High-Mounted Stop Lamp ..................................... 105
BULB REPLACEMENT ...................................... 105
REMOVAL AND INSTALLATION ....................... 105
Stop Lamp ............................................................. 105
BULB REPLACEMENT ...................................... 105
REMOVAL AND INSTALLATION ....................... 105
BACK-UP LAMP ..................................................... 106
Wiring Diagram — BACK/L — .............................. 106
Bulb Replacement ................................................. 107
Removal and Installation ....................................... 107
PARKING, LICENSE PLATE AND TAIL LAMPS .... 108

LT-3
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: October 20052005 QX56 Component Parts and Harness Connector Location . 108
System Description .............................................. 108
OPERATION BY LIGHTING SWITCH .............. 109
COMBINATION SWITCH READING FUNCTION . 109
EXTERIOR LAMP BATTERY SAVER CONTROL . 109
CAN Communication System Description ............ 109
Schematic ............................................................. 110
Wiring Diagram — TAIL/L — ................................ . 111
Terminals and Reference Values for BCM ............ 114
Terminals and Reference Values for IPDM E/R .... 115
How to Proceed With Trouble Diagnosis ............... 115
Preliminary Check ................................................. 115
CHECK POWER SUPPLY AND GROUND CIR-
CUIT ................................................................... 115
CONSULT-II Functions .......................................... 116
Parking, License Plate and/or Tail Lamps Do Not
Illuminate ............................................................... 117
Parking, License Plate and Tail Lamps Do Not Turn
OFF (After Approx. 10 Minutes) ........................... 120
Front Parking Lamp .............................................. 121
BULB REPLACEMENT ..................................... 121
Tail Lamp .............................................................. 121
BULB REPLACEMENT ..................................... 121
License Plate Lamp .............................................. 121
BULB REPLACEMENT ..................................... 121
REAR COMBINATION LAMP ................................ 122
Bulb Replacement (Turn Signal) .......................... 122
Removal and Installation ...................................... 122
.......................................................................... 122
TRAILER TOW ....................................................... 123
Component Parts and Harness Connector Location . 123
System Description .............................................. 123
TRAILER TAIL LAMP OPERATION .................. 124
TRAILER TURN SIGNAL AND HAZARD LAMP
OPERATION ..................................................... 124
TRAILER STOP LAMP OPERATION ................ 124
TRAILER POWER SUPPLY OPERATION ........ 124
Schematic ............................................................ 125
Wiring Diagram — T/TOW — ............................... 126
INTERIOR ROOM LAMP ........................................ 129
Component Parts and Harness Connector Location . 129System Description ...............................................130
POWER SUPPLY AND GROUND ....................130
SWITCH OPERATION ......................................131
ROOM LAMP TIMER OPERATION ..................131
INTERIOR LAMP BATTERY SAVER CONTROL .132
Schematic .............................................................133
Wiring Diagram — INT/L — ..................................135
Terminals and Reference Values for BCM ............142
How to Proceed With Trouble Diagnosis ..............143
Preliminary Check ................................................143
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT ...........................................143
CONSULT-II Function (BCM) ...............................144
CONSULT-II OPERATION .................................144
WORK SUPPORT .............................................145
DATA MONITOR ...............................................145
ACTIVE TEST ...................................................146
Room/Map Lamp Control Does Not Operate .......146
Personal Lamp Control Does Not Operate (Room/
Map Lamps Operate) ............................................148
All Step/Foot/Puddle Lamps Do Not Operate .......149
All Interior Room Lamps Do Not Operate .............150
Ignition Keyhole Illumination Control Does Not
Operate .................................................................150
ILLUMINATION .......................................................152
Component Parts and Harness Connector Location .152
System Description ...............................................152
ILLUMINATION OPERATION BY LIGHTING
SWITCH ............................................................153
EXTERIOR LAMP BATTERY SAVER CONTROL .154
CAN Communication System Description ............154
Schematic .............................................................155
Wiring Diagram — ILL — ......................................158
Removal and Installation of Illumination Control
Switch ...................................................................169
REMOVAL .........................................................169
INSTALLATION .................................................169
BULB SPECIFICATIONS ........................................170
Headlamp .............................................................170
Exterior Lamp .......................................................170
Interior Lamp/Illumination .....................................170