Infiniti FX35, FX50 (S51). Manual - part 428

CCS-532

< SYMPTOM DIAGNOSIS >

[LDW & LDP]

LDW & LDP SYSTEM SYMPTOMS

LDP system setting cannot be 
turned ON/OFF from the naviga-
tion screen.

• LDP system setting is not 

selectable on the naviga-
tion screen.

• LDP system setting differs 

from the one set at the pre-
vious driving.

• ICC sensor integrated unit
• AV control unit
• Unified meter and A/C amp.

ICC Data monitor
“LDP SELECT”

LDP system is not activated.
(LDW system is functioning nor-
mally)

Indicator lamp is not turned 
ON 

⇔

 OFF when operating 

LDP switch.

• LDP switch

(ICC steering switch)

• ICC sensor integrated unit

• LDP switch

(ICC steering switch)

• ICC Data monitor

“LDP SYSTEM ON”

Warning is functioning but 
yawing is not functioning.

—

• Cause of auto-cancel

CCS-463

• Normal operating condition

CCS-533

Yawing is functioning but 
warning is not functioning.

• ABS actuator and electric unit 

(control unit)

• Lane camera unit

—

Warning functions are not timely.

(Example)

• Does not function when driving on lane markers.
• Functions when driving in a lane.
• Functions in a different position from the actual position.

• Camera aiming adjustment
• Lane camera unit

Camera aiming adjustment

CCS-445

Functions when changing the course in direction of the turn sig-
nal.

Turn signal
• BCM
• Lane camera unit

LANE CAMERA Data monitor
“TURN SIGNAL”

Symptom

Possible cause

Inspection item/Reference page

CCS

NORMAL OPERATING CONDITION

CCS-533

< SYMPTOM DIAGNOSIS >

[LDW & LDP]

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NORMAL OPERATING CONDITION

Description

INFOID:0000000005502131

LANE DEPARTURE WARNING (LDW)

• LDW system is only a warning device to inform the driver of a potential unintended lane departure. It does

not steer the vehicle or prevent loss of control. It is the driver's responsibility to stay alert, drive safely, keep
the vehicle in the traveling lane, and be in control of the vehicle at all times.

• LDW system does not operate at speeds below approximately 72 km/h (45 MPH) or if it cannot detect lane

markers.

• Excessive noise interfere with the warning sound, and the buzzer may not be heard.
• LDW system may not function properly under the following conditions:
- On roads where there are multiple parallel lane markers; lane markers that are faded or not painted clearly;

yellow painted lane markers; non-standard lane markers; or covered with water, dirt or snow, etc.

- On roads where the discontinued lane markers are still detectable.
- On roads where there are sharp curves.
- On roads where there are sharply contrasting objects, such as shadows, snow, water, wheel ruts, seams or

lines remaining after road repairs. (The LDW system could detect these items as lane markers.)

- On roads where the traveling lane merges or separates.
- When the vehicle's traveling direction does not align with the lane marker.
- When traveling close to other vehicle in front of the vehicle, which obstructs the lane camera unit detection

range.

- When rain, snow or dirt adheres to the windshield in front of the lane camera unit.
- When the headlights are not bright due to dirt on the lens or if the aiming is not adjusted properly.
- When strong light enters the lane camera unit. (For example, the light directly shines on the front of the vehi-

cle at sunrise or sunset.)

- When a sudden change in brightness occurs. (For example, when the vehicle enters or exits a tunnel or

under a bridge.) 

LANE DEPARTURE PREVENTION (LDP)

• LDP system does not steer the vehicle or prevent loss of control. It is the driver's responsibility to stay alert,

drive safely, keep the vehicle in the traveling lane, and be in control of vehicle at all times.

• LDP system is primarily intended for use on well-developed freeways or highways. It may not detect the lane

markers in certain roads, weather or driving conditions.

• Using the LDP system under some conditions of road, lane marker or weather, or when driver changes lanes

without using the turn signal could lead to an unexpected system operation. In such conditions, driver needs
to correct the vehicle's direction with driver's steering operation to avoid accidents.

• When the LDP system is operating, avoid excessive or sudden steering maneuvers. Otherwise, driver could

lose control of the vehicle.

• The LDP system does not operate at speeds below approximately 72 km/h (45 MPH) or if it cannot detect

lane markers.

• The LDP system may not function properly under the following conditions, and do not use the LDP system:
- During bad weather (rain, fog, snow, wind, etc.).
- When driving on slippery roads, such as on ice or snow, etc.
- When driving on winding or uneven roads.
- When there is a lane closure due to road repairs.
- When driving in a makeshift lane.
- When driving on roads where the lane width is too narrow.
- When driving without normal tire conditions (for example, tire wear, low tire pressure, installation of spare

tire, tire chains, non-standard wheels).

- When the vehicle is equipped with non-original brake parts or suspension parts.
• Excessive noise does interfere with the warning sound, and the buzzer may not be heard.
• The functions of the LDP system (warning and brake control assist) may or may not operate properly under

the following conditions:

•
- On roads where there are multiple parallel lane markers; lane markers that are faded or not painted clearly;

yellow painted lane markers; non-standard lane markers or covered with water, dirt or snow, etc.

- On roads where discontinued lane markers are still detectable.
- On roads where there are sharp curves.
- On roads where there are sharply contrasting objects, such as shadows, snow, water, wheel ruts, seams or

lines remaining after road repairs (The LDP system could detect these items as lane markers.).

CCS-534

< SYMPTOM DIAGNOSIS >

[LDW & LDP]

NORMAL OPERATING CONDITION

- On roads where the traveling lane merges or separates.
- When the vehicle's traveling direction does not align with the lane marker.
- When traveling close to other vehicle in front of the vehicle, which obstructs the lane camera unit detection

range.

- When rain, snow or dirt adheres to the windshield in front of the lane camera unit.
- When the headlights are not bright due to dirt on the lens or if the aiming is not adjusted properly.
- When strong light enters the lane camera unit (For example, the light directly shines on the front of the vehi-

cle at sunrise or sunset.)

- When a sudden change in brightness occurs (For example, when the vehicle enters or exits a tunnel or

under a bridge.)

• While the LDP system is operating, driver may hear a sound of brake operation. This is normal and indicates

that the LDP system is operating properly.

CCS

PRECAUTIONS

CCS-535

< PRECAUTION >

[LDW & LDP]

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PRECAUTION

PRECAUTIONS

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

INFOID:0000000005502132

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 AIR BAG” 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 AIR BAG”.

• 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.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, DO NOT use air or electric 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 minutes before performing any service.

Precaution for LDW/LDP System Service

INFOID:0000000005502133

WARNING:

Be careful of traffic conditions and safety around the vehicle when performing road test.

CAUTION:

• Never use the LDP system when driving with free rollers or a chassis dynamometer.
• Never perform the active test while driving.
• Never disassemble and remodel the lane camera unit.
• Do not use the lane camera unit that is removed from the vehicle.
• Never change LDW initial state ON 

⇒

 OFF without the consent of the customer. 

To keep the LDW/LDP system operating properly, be sure to observe the following items:
• Always keep the windshield clean. The sensing capability of the camera unit depends on the condi-

tion of the windshield. See “Appearance and care” for cleaning instructions.

• Never strike or damage the areas around the lane camera unit.
• Never touch the camera lens.
• Never attach a sticker (including transparent material) or install an accessory near the lane camera

unit.

• Never place reflective materials, such as a white paper or mirrors on the instrument panel. Reflection

of the sunlight may adversely affect the camera unit's lane marker detection capability.