brake light INFINITI QX 2011 Service Manual

PRECAUTIONS ON DISTANCE CONTROL
ASSIST SYSTEM
The system is intended to assist the driver to
keep a following distance from the vehicle
ahead traveling in the same lane and direction.
If the distance sensor
Adetects a slower
moving vehicle ahead, the system will reduce
the vehicle speed to help assist the driver to
maintain a following distance.
The system automatically controls the throttle
and applies the brakes (up to 25% of vehicle
braking power) if necessary. The detection range of the sensor is approxi-
mately 390 ft (120 m) ahead.
WARNING
●
This system is only an aid to assist the driver
and is not a collision warning or avoidance
device. It is the driver’s responsibility to stay
alert, drive safely and be in control of the
vehicle at all times.
● This system will not adapt automatically to
road conditions. Do not use the system on
roads with sharp curves, or on icy roads, in
heavy rain or in fog.
The distance sensor will not detect the follow-
ing objects:
● Stationary and slow moving vehicles
● Pedestrians or objects in the roadway
● Oncoming vehicles in the same lane
● Motorcycles traveling offset in the travel
lane
WARNING
● As there is a performance limit to the dis-
tance control function, never rely solely on
the Distance Control Assist system. This
system does not correct careless, inatten-
tive or absent-minded driving, or overcome
poor visibility in rain, fog, or other bad
weather. Decelerate the vehicle speed by de-
pressing the brake pedal, depending on the
distance to the vehicle ahead and the sur-
rounding circumstances in order to maintain
a safe distance between vehicles.
● The system may not function properly under
the following conditions. To avoid accidents,
never use the Distance Control Assist sys-
tem under the following conditions:
– On roads with sharp curves
– On slippery road surfaces such as on ice or snow, etc.
– On off-road surfaces such as on sand or rock, etc.
– During bad weather (rain, fog, snow, etc.)
– When strong light (for example, at sun- rise or sunset) is directly shining on the
front of the vehicle
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The stoplights of the vehicle come on when brak-
ing is performed by the DCA system.
When the brake operates, a noise may be heard
or felt. This is not a malfunction.
WARNING
●When the vehicle ahead detection indicator
is not illuminated, system will not control or
warn the driver.
● Depending on the position of the accelerator
pedal, the system may not be able to assist
the driver to release the accelerator pedal
appropriately.
● If the vehicle ahead comes to a standstill,
the vehicle decelerates to a standstill within
the limitations of the system. The system
will release brake control with a warning
chime once it judges the vehicle is at a
standstill. To prevent the vehicle from mov-
ing, the driver must depress the brake pedal.
(The system will resume control automati-
cally once the system reaches 3 MPH (5
km/h). Overriding the system :
The following driver’s operation overrides the
system operation.
●
When the driver depresses the accelerator
pedal even further while the system is mov-
ing the accelerator pedal upward, the DCA
system control of the accelerator pedal is
canceled.
● When the driver’s foot is on the accelerator
pedal, the brake control by the system is not
operated.
● When the driver’s foot is on the brake pedal,
neither the brake control nor the alert by the
system operates.
● When the Intelligent Cruise Control (ICC)
system is set, the DCA system will be can-
celled.
Approach warning
If your vehicle comes closer to the vehicle
ahead due to rapid deceleration of that vehicle
or if another vehicle cuts in, the system warns
the driver with the chime and DCA system
display. Decelerate by depressing the brake
pedal to maintain a safe vehicle distance if:
● The chime sounds.
● The vehicle ahead detection indicator blinks.
The warning chime may not sound in some
cases when there is a short distance between
vehicles. Some examples are:
● When the vehicles are traveling at the same
speed and the distance between vehicles is
not changing
● When the vehicle ahead is traveling faster
and the distance between vehicles is in-
creasing
● When a vehicle cuts in near your vehicle
The warning chime will not sound when your
vehicle approaches vehicles that are parked or
moving slowly.
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●The system may not function when the dis-
tance to the vehicle ahead is extremely
close.
● The system is designed to automatically
check the sensor’s functionality. If the sen-
sor is covered with ice, a transparent or
translucent plastic bag, etc., the system may
not detect them. In these instances the sys-
tem may not be able to warn the driver prop-
erly. Be sure to check and clean the sensor
regularly.
● Excessive noise will interfere with the warn-
ing chime sound, and the chime may not be
heard.
● A sudden appearance of a vehicle in front
(i.e., it abruptly cuts in) may not be detected
and the system may not warn the driver soon
enough.
● The system will be cancelled automatically
with a beep sound and the IBA OFF indicator
light will illuminate under the following
conditions:
– When the sensor window is dirty
– When the system malfunctions If the IBA OFF indicator light
Ailluminates with
a beep sound, pull off the road to a safe
location, stop the vehicle and turn the engine
off. Check to see if the sensor window is dirty.
If the sensor window is dirty, clean it with a soft
cloth and restart the engine. If the sensor
window is not dirty, restart the engine. If the
IBA OFF indicator light continues to illuminate
even if the IBA system is turned on with the IBA
OFF switch
B, have the system checked by an
INFINITI retailer.
To turn on the IBA system, see “INTELLIGENT
BRAKE ASSIST (IBA) SYSTEM” later in this sec-
tion.
FCW system operation (Type A)
The FCW system is automatically turned on
when the engine is started and the warning
systems ON indicator light
1illuminates on
the warning systems switch. You can turn the
FCW system off by pushing the warning systems
switch on the instrument panel. This switch will
turn on and off the LDW, BSW and FCW systems
at the same time.
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Warning systems switch
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The Intelligent Brake Assist (IBA) system warns
the driver by a warning light and chime when
there is a risk of a collision with the vehicle
ahead in the traveling lane and the driver must
take avoidance action immediately. The system
helps reduce the rear-end collision speed by
applying the brakes when the system judges
that the collision cannot be prevented.
The IBA system will function when your vehicle
is driven at speeds of approximately 10 MPH (15
km/h) and above, and when your vehicle is
driven at speeds approximately 10 MPH (15
km/h) faster than the vehicle ahead.The IBA system uses a distance sensorA
located below the front bumper to measure the
distance to the vehicle ahead. When the system
judges that your vehicle is getting close to the
vehicle ahead in the traveling lane, the vehicle
ahead detection indicator on the instrument
panel blinks and a warning chime sounds.
The IBA system will be turned on/off by pushing
the IBA OFF switch. The IBA OFF indicator light
will illuminate when the system is turned off.
PRECAUTIONS ON IBA SYSTEM
WARNING
●
The IBA system is not a collision avoidance
system. It is the driver’s responsibility to
stay alert, drive safely and be in control of
the vehicle at all times.
● As there is a performance limit, the system
may not provide a warning or braking in cer-
tain conditions.
● The system will not detect the following
objects:
– Pedestrians, animals or obstacles in the roadway
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Vehicle ahead detection indicator
SSD0749
INTELLIGENT BRAKE ASSIST (IBA) SYSTEM
(if so equipped)
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WARNING
●Do not attempt to raise two wheels off the
ground and shift the transmission to any
drive or reverse position with the engine run-
ning. Doing so may result in drivetrain dam-
age or unexpected vehicle movement which
could result in serious vehicle damage or
personal injury.
● Do not attempt to test a 4WD equipped ve-
hicle on a 2-wheel dynamometer or similar
equipment even if the other two wheels are
raised off the ground. Make sure you inform
test facility personnel that your vehicle is
equipped with 4WD before it is placed on a
dynamometer. Using the wrong test equip-
ment may result in drivetrain damage or un-
expected vehicle movement which could re-
sult in serious vehicle damage or personal
injury.
CAUTION
● Do not drive the vehicle in the 4HI or 4LO
position on dry hard surface roads. Driving
on dry, hard surfaces in 4HI or 4LO may
cause unnecessary noise, tire wear and in-
creased fuel consumption.
If the Four-Wheel Drive (4WD) warning light
turns on when driving on dry hard surface
roads:
– in the 4HI position, shift the 4WD shift switch to AUTO.
– in the 4LO position, stop the vehicle and shift the transmission lever to the N (Neu-
tral) position with the brake pedal de-
pressed and shift the 4WD shift switch to
AUTO.
If the 4WD warning light is still on after
the above operation, have your vehicle
checked by an INFINITI retailer as soon as
possible.
● The transfer case may be damaged if you
continue driving with the 4WD warning light
blinking.
See “ON-PAVEMENT AND OFF-ROAD DRIVING
PRECAUTIONS” earlier in this section for other
precautions for offroad driving.
INFINITI ALL-MODE 4WD SYSTEM
The all mode 4WD system provides 3 positions
(AUTO, 4HI and 4LO), so you can select the
desired drive mode according to the driving
conditions.
INFINITI ALL-MODE 4WD(if so equipped)
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The 4WD shift switch is used to select the 4WD
mode depending on the driving conditions.
There are 3 types of drive modes available,
AUTO, 4HI and 4LO.
The 4WD shift switch electronically controls the
transfer case operation. Rotate the switch to
move between each mode, AUTO, 4H and 4L.
You must depress the 4WD shift switch to select
4L, and the vehicle MUST be stationary and the
selector lever in the N (Neutral) position when
changing into or out of 4L.
WARNING
●When parking, apply the parking brake be-
fore stopping the engine and make sure that
the 4WD shift indicator is on and the ATP
warning light turns off. Otherwise, the ve-
hicle could unexpectedly move even if the
automatic transmission is in the P (Park)
position.
● The 4LO and 4HI indicators must stop blink-
ing and the 4LO or 4HI indicator must remain
illuminated or turn off before shifting the
transmission into gear. If the selector lever
is shifted from the N (Neutral) position to any
other gear while the 4LO and 4HI indicators
are blinking alternately, the vehicle may
move unexpectedly.
CAUTION
● Never shift the 4WD shift switch between 4L
and 4H while driving.
● The 4HI position provides greater traction.
Avoid excessive speed, as it will cause in-
creased fuel consumption and higher oil
temperatures, and could damage drivetrain
component. Speeds over 62 MPH (100 km/h)
in 4HI is not recommended.
● The 4LO position provides maximum trac-
tion. Avoid raising vehicle speed exces-
sively, as the maximum speed is approxi-
mately 31 MPH (50 km/h).
● When driving straight, shift the 4WD shift
switch to the AUTO or 4H position. Do not
move the 4WD shift switch when making a
turn or reversing.
● Do not shift the 4WD shift switch (between
AUTO and 4H) while driving on steep down-
hill grades. Use the engine brake and low
automatic transmission gears for engine
braking.
● Do not operate the 4WD shift switch (be-
tween AUTO and 4H) with the rear wheels
spinning. ●
Do not drive on dry hard surface roads in the
4HI or 4LO position. Driving on dry hard sur-
faces in 4HI or 4LO may cause unnecessary
noise and tire wear. INFINITI recommends
driving in the AUTO position under these
conditions.
● The 4WD transfer case may not be shifted
between 4HI and 4LO at low ambient tem-
peratures and the 4LO and 4HI indicators
may blink even when the 4WD shift switch is
shifted. After driving for a while you can
change the 4WD shift switch between 4H
and 4L.
When driving on rough roads,
● Drive carefully according to the road surface
conditions.
When the vehicle is stuck,
● Place stones or wooden blocks under the
tires to free the vehicle.
● Set the 4WD shift switch to 4H or 4L.
● If it is difficult to free the vehicle, repeat
forward and backward movement to increase
the movement.
● If the vehicle is stuck deep in mud, tire
chains may be effective.
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CAUTION
●Do not spin the tires excessively. Tires will
sink deep into the mud, making it difficult to
free the vehicle.
● Avoid shifting gears with the engine running
at high speeds as this may cause
malfunction.
4WD SHIFT SWITCH
● Shift the 4WD shift switch to either the
AUTO, 4H or 4L position, depending on
driving conditions.
● With the switch set to the AUTO position,
distribution of torque to the front and rear
wheels changes automatically, depending
on road conditions encountered [ratio; 0 :
100 (2WD) →50 : 50 (4WD)]. This results in
improved driving stability. ●
If the 4WD shift switch is operated while mak-
ing a turn, accelerating or decelerating or if
the ignition switch is placed in the OFF posi-
tion while in the AUTO, 4H or 4L, you may feel
a jolt. This is not abnormal.
● When the vehicle is stopped after making a
turn, you may feel a slight jolt after the selec-
tor lever is shifted to N (Neutral) or P (Park)
position. This occurs because the transfer
clutch is released and not because of a mal-
function.
CAUTION
● When driving straight, shift the 4WD shift
switch to the AUTO or 4H position. Do not
move the 4WD shift switch when making a
turn or reversing.
● Do not shift the 4WD shift switch while driv-
ing on steep downhill grades. Use the en-
gine brake and low automatic transmission
gears for engine braking.
● Do not operate the 4WD shift switch with the
rear wheels spinning.
● Before placing the 4WD shift switch in the 4H
position from AUTO, ensure the vehicle
speed is less than 62 MPH (100 km/h). Fail-
ure to do so can damage the 4WD system.
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WARNING
●Never rely solely on the hill start assist sys-
tem to prevent the vehicle from moving back-
ward on a hill. Always drive carefully and
attentively. Depress the brake pedal when
the vehicle is stopped on a steep hill. Be
especially careful when stopped on a hill on
frozen or muddy roads. Failure to prevent the
vehicle from rolling backwards may result in
a loss of control of the vehicle and possible
serious injury or death.
● The hill start assist system is not designed
to hold the vehicle at a standstill on a hill.
Depress the brake pedal when the vehicle is
stopped on a steep hill. Failure to do so may
cause the vehicle to roll backwards and may
result in a collision or serious personal
injury.
● The hill start assist system may not prevent
the vehicle from rolling backwards on a hill
under all load or road conditions. Always be
prepared to depress the brake pedal to pre-
vent the vehicle from rolling backwards. Fail-
ure to do so may result in a collision or seri-
ous personal injury. The hill start assist system automatically keeps
the brakes applied to help prevent the vehicle
from rolling backwards in the time it takes the
driver to release the brake pedal and apply the
accelerator when the vehicle is stopped on a
hill.
The hill start assist system will operate auto-
matically under the following conditions:
●
The transmission is shifted to a forward or
reverse gear.
● The vehicle is stopped completely on a hill
by applying the brake.
The maximum holding time is 2 seconds. After 2
seconds the vehicle will begin to roll back and
the hill start assist system will stop operating
completely.
The hill start assist system will not operate
when the transmission is shifted to the N
(Neutral) or P (Park) position or on a flat and
level road.
When the Vehicle Dynamic Control (VDC) warn-
ing light illuminates in the meter, the hill start
assist system will not operate. (See
“WARNING/INDICATOR LIGHTS AND AUDIBLE RE-
MINDERS” in the “2. Instruments and controls”
section.)
HILL START ASSIST SYSTEM
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WARNING
If the engine is not running or is turned off while
driving, the power assist for the steering will
not work. Steering will be harder to operate.
The power assisted steering uses a hydraulic
pump, driven by the engine, to assist steering.
If the engine stops or the drive belt breaks, you
will still have control of the vehicle. However,
much greater steering effort is needed, espe-
cially in sharp turns and at low speeds.
BRAKING PRECAUTIONS
The brake system has two separate hydraulic
circuits. If one circuit malfunctions, you will still
have braking ability at two wheels.
You may feel a small click and hear a sound
when the brake pedal is fully depressed slowly.
This is not a malfunction and indicates that the
brake assist mechanism is operating properly.
Hydraulically-assisted brakes
The hydraulically-assisted brake system is de-
signed to use a hydraulic pump driven electri-
cally, to assist braking. If the engine stops, you
can stop the vehicle by depressing the foot
brake pedal. However, greater foot pressure on
the foot brake pedal will be required to stop the
vehicle. The stopping distance will be longer.
Wet brakes
When the vehicle is washed or driven through
water, the brakes may get wet. As a result, your
braking distance will be longer and the vehicle
may pull to one side during braking.
To dry brakes, drive the vehicle at a safe speed
while lightly tapping the brake pedal to heat-up
the brakes. Do this until the brakes return to
normal. Avoid driving the vehicle at high speeds
until the brakes function correctly.
PARKING BRAKE BREAK-IN
Break in the parking brake shoes whenever the
stopping effect of the parking brake is weak-
ened or whenever the parking brake shoes
and/or drums/rotors are replaced, in order to
assure the best braking performance.
This procedure is described in the vehicle ser-
vice manual and can be performed by an
INFINITI retailer.
Using the brakes
Avoid resting your foot on the brake pedal while
driving. This will cause overheating of the
brakes, wearing out the brake and pads faster
and reduce gas mileage.
To help save the brakes and to prevent the
brakes from overheating, reduce speed and
downshift to a lower gear before going down a
slope or long grade. Overheated brakes may
reduce braking performance and could result in
loss of vehicle control.
POWER STEERING BRAKE SYSTEM
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WARNING
●While driving on a slippery surface, be care-
ful when braking, accelerating or downshift-
ing. Abrupt braking or accelerating could
cause the wheels to skid and result in an
accident.
● If the engine is not running or is turned off
while driving, the power assist for the
brakes will not work. Braking will be harder.
BRAKE ASSIST
When the force applied to the brake pedal
exceeds a certain level, the Brake Assist is
activated generating greater braking force than
a conventional brake booster even with light
pedal force.
WARNING
The Brake Assist is only an aid to assist braking
operation and is not a collision warning or
avoidance device. It is the driver’s responsibil-
ity to stay alert, drive safely and be in control of
the vehicle at all times.
PREVIEW FUNCTION (Intelligent Cruise
Control system equipped models)
When the Preview Function identifies the need
to apply emergency braking by sensing a ve-
hicle ahead in the same lane and the distance
and relative speed from it, it applies the brake
pre-pressure before the driver depresses the
brake pedal and helps improve brake response
by reducing pedal free play.
● This system will not operate when the ve-
hicle is moving at approximately 20 MPH (32
km/h) or less. ●
The pre-pressure function ceases when the
following conditions are met:
a) When the driver depresses the accelera- tor pedal or the brake pedal.
b) If the driver does not operate the accel- erator or brake pedal within approxi-
mately 1 second.
c) When the 4WD shift switch is in the 4H or 4L position (for 4WD models).
BRAKE ASSIST
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