Page 2377 of 4083
HRN-1
DRIVER CONTROLS
C
DE
F
G H
I
J
K
M
SECTION HRN
A
B
HRN
N
O P
CONTENTS
HORN
PRECAUTION ....... ........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
COMPONENT DIAGNOSIS ..........................4
HORN .................................................................4
Wiring Diagram .................................................... .....4
REMOVAL AND INSTALLATION ................7
HORN .................................................................7
Removal and Installation ..................................... .....7
Revision: March 2010 2008 QX56
Page 2378 of 4083

HRN-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004925177
The Supplemental Restraint System such as “A IR 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, 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 performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000004925178
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56
Page 2379 of 4083
PRECAUTIONSHRN-3
< PRECAUTION >
C
DE
F
G H
I
J
K
M A
B
HRN
N
O P
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
Revision: March 2010 2008 QX56
Page 2380 of 4083
HRN-4
< COMPONENT DIAGNOSIS >
HORN
COMPONENT DIAGNOSIS
HORN
Wiring DiagramINFOID:0000000001737093
AALWA0084GB
Revision: March 20102008 QX56
Page 2381 of 4083
HORN
HRN-5
< COMPONENT DIAGNOSIS >
C
D E
F
G H
I
J
K
M A
B
HRN
N
O P
ALLIA0304GB
Revision: March 2010 2008 QX56
Page 2382 of 4083
HRN-6
< COMPONENT DIAGNOSIS >
HORN
ALLIA0305GB
Revision: March 20102008 QX56
Page 2383 of 4083
HORN
HRN-7
< REMOVAL AND INSTALLATION >
C
D E
F
G H
I
J
K
M A
B
HRN
N
O P
REMOVAL AND INSTALLATION
HORN
Removal and InstallationINFOID:0000000001608203
REMOVAL
1. Disconnect horn connector.
2. Remove horn bolt and remove horn from vehicle.
INSTALLATION
Installation is in the reverse order of removal.
LKIA0419E
Revision: March 2010 2008 QX56
Page 2384 of 4083

INL-1
DRIVER CONTROLS
C
DE
F
G H
I
J
K
M
SECTION INL
A
B
INL
N
O P
CONTENTS
INTERIOR LIGHTING SYSTEM
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
FUNCTION DIAGNOSIS ...............................6
INTERIOR ROOM LAMP CONTROL SYSTEM
.....
6
System Diagram .................................................. ......6
System Description ...................................................6
Component Parts Location ........................................7
Component Description .............................................8
ILLUMINATION CONTROL SYSTEM .................9
System Diagram .................................................. ......9
System Description ...................................................9
Component Parts Location ........................................9
Component Description ...........................................10
DIAGNOSIS SYSTEM (BCM) ............................11
COMMON ITEM ..................................................... ....11
COMMON ITEM : CONSULT-III Function ...............11
INT LAMP .............................................................. ....11
INT LAMP : CONSULT-III Function ........................11
BATTERY SAVER ................................................. ....13
BATTERY SAVER : CONSULT-III Function ...........13
COMPONENT DIAGNOSIS .........................14
POWER SUPPLY AND GROUND CIRCUIT .. ....14
BCM ....................................................................... ....14
BCM : Inspection Procedure ...................................14
INTERIOR ROOM LAMP POWER SUPPLY
CIRCUIT ......................................................... ....
15
Description .......................................................... ....15
Component Function Check ....................................15
Diagnosis Procedure ...............................................15
INTERIOR ROOM LAMP CONTROL CIRCUIT
...
17
Description ........................................................... ....17
Component Function Check ....................................17
Diagnosis Procedure ...............................................17
STEP LAMP CIRCUIT .......................................19
Description ........................................................... ....19
Component Function Check ....................................19
Diagnosis Procedure ...............................................19
CARGO LAMP CONTROL CIRCUIT ................21
Description ...............................................................21
Component Function Check ....................................21
Diagnosis Procedure ...............................................21
IGNITION KEYHOLE ILLUMINATION CON-
TROL CIRCUIT .................................................
23
Description ...............................................................23
Component Function Check ....................................23
Diagnosis Procedure ...............................................23
INTERIOR ROOM LAMP CONTROL SYSTEM
...
25
Wiring Diagram .................................................... ....25
ILLUMINATION .................................................41
Wiring Diagram ........................................................41
ECU DIAGNOSIS .........................................55
BCM (BODY CONTROL MODULE) .................55
Description ........................................................... ....55
SYMPTOM DIAGNOSIS ..............................56
INTERIOR LIGHTING SYSTEM SYMPTOMS ...56
Symptom Table ................................................... ....56
PRECAUTION ..............................................57
PRECAUTIONS .................................................57
Revision: March 2010 2008 QX56