Infiniti G37 Coupe. Manual - part 791

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< COMPONENT DIAGNOSIS >

HORN

JCLWA0789GB

PRECAUTIONS

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< PRECAUTION >

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

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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 AIRBAG” and “SEAT BELT” of this
Service Manual.

WARNING:

• 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 performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.

• 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 har-
ness connectors.

Precaution for Battery Service

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Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.

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< ON-VEHICLE REPAIR >

HORN

ON-VEHICLE REPAIR

HORN

Exploded View

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Removal and Installation

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REMOVAL

Horn (LOW)

1.

Remove radiator core support ornament. Refer to 

DLK-214, "Exploded View"

.

2.

Disconnect the horn (LOW) connector.

3.

Remove the horn mounting nut, and remove the horn (LOW) from the vehicle.

Horn ( HIGH)

1.

Remove fender protector (LH). Refer to 

EXT-24, "FENDER PROTECTOR : Exploded View"

.

2.

Disconnect the horn (HIGH) connector.

3.

Remove the horn mounting bolt, and remove the horn (HIGH) from the vehicle.

INSTALLATION

Install in the reverse order of removal.

1.

Horn (LOW)

2.

Horn (HIGH)

JPLIA0569ZZ

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DRIVER CONTROLS

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SECTION 

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CONTENTS

INTERIOR LIGHTING SYSTEM

BASIC INSPECTION  ....................................

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DIAGNOSIS AND REPAIR WORKFLOW  ..........

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Work Flow  .................................................................

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FUNCTION DIAGNOSIS ...............................

5

INTERIOR ROOM LAMP CONTROL SYSTEM 

.....

5

System Diagram ........................................................

5

System Description  ...................................................

5

Component Parts Location ........................................

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Component Description ............................................

8

INTERIOR ROOM LAMP BATTERY SAVER 
SYSTEM ..............................................................

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System Diagram ........................................................

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System Description  ...................................................

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Component Parts Location ......................................

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Component Description ..........................................

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ILLUMINATION CONTROL SYSTEM ................

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System Diagram ......................................................

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System Description  .................................................

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Component Parts Location ......................................

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Component Description ...........................................

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DIAGNOSIS SYSTEM (BCM)  ............................

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COMMON ITEM  .........................................................

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COMMON ITEM : CONSULT-III Function (BCM - 
COMMON ITEM) .....................................................

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INT LAMP  ..................................................................

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INT LAMP : CONSULT-III Function (BCM - INT 
LAMP) .....................................................................

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BATTERY SAVER  .....................................................

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BATTERY SAVER : CONSULT-III Function (BCM 
- BATTERY SAVER)  ...............................................

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COMPONENT DIAGNOSIS  .........................

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POWER SUPPLY AND GROUND CIRCUIT  ....

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BCM ...........................................................................

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BCM : Diagnosis Procedure  ....................................

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INTERIOR ROOM LAMP POWER SUPPLY 
CIRCUIT ............................................................

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Description ...............................................................

20

Component Function Check  ....................................

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Diagnosis Procedure  ...............................................

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INTERIOR ROOM LAMP CONTROL CIRCUIT 

...

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Description ...............................................................

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Component Function Check  ....................................

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Diagnosis Procedure  ...............................................

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STEP LAMP CIRCUIT .......................................

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Description ...............................................................

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Component Function Check  ....................................

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Diagnosis Procedure  ...............................................

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TRUNK ROOM LAMP CIRCUIT  .......................

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Description ...............................................................

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Component Function Check  ....................................

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Diagnosis Procedure  ...............................................

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PUSH-BUTTON IGNITION SWITCH ILLUMI-
NATION CIRCUIT  .............................................

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Description ...............................................................

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Component Function Check  ....................................

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Diagnosis Procedure  ...............................................

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INTERIOR ROOM LAMP CONTROL SYSTEM 

...

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Wiring Diagram - INTERIOR ROOM LAMP -  ..........

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ILLUMINATION .................................................

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Wiring Diagram - ILLUMINATION -  .........................

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ECU DIAGNOSIS .........................................

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