2018 INFINITI Q50 HYBRID power steering

3 Pre-driving checks and adjustments
Keys ........................................................................\
............... 3-2Intelligent Key ............................................................... 3-2
Valet hand-off .............................................................. 3-3
Doors ........................................................................\
............ 3-4 Locking with mechanical key .................................... 3-4
Opening and closing windows with
mechanical key .............................................................. 3-4
Locking with inside lock knob .................................. 3-5
Locking with power door lock switch .................... 3-5
Automatic door locks .................................................. 3-5
Child safety rear door lock ........................................ 3-6
Intelligent Key system ...................................................... 3-6 Intelligent Key operating range ............................... 3-8
Door locks/unlocks precaution ............................... 3-9
Intelligent Key operation ........................................... 3-9
Battery saver system ................................................ 3-13
Warning signals .......................................................... 3-13
Troubleshooting guide .............................................. 3-14
Log-in function ........................................................... 3-15
Remote keyless entry system ...................................... 3-15
How to use remote keyless entry system ........... 3-16
Remote engine start ....................................................... 3-19 Remote engine start operating range .................. 3-19
Remote starting the engine .................................... 3-19 Extending engine run time ................................... 3-20
Canceling a remote start ...................................... 3-20
Conditions the remote start will not work ...... 3-20
Hood ........................................................................\
........... 3-21
Trunk lid ........................................................................\
..... 3-22 Trunk lid release switch ......................................... 3-22
Trunk open request switch ................................... 3-22
TRUNK button .......................................................... 3-23
Trunk release power cancel switch .................... 3-23
Interior trunk lid release ......................................... 3-24
Fuel-filler door ................................................................. 3-24 Opening the fuel-filler door .................................. 3-24
Fuel-filler cap ............................................................ 3-25
Tilt/telescopic steering ................................................. 3-27 Electric operation ..................................................... 3-27
Sun visors ........................................................................\
.. 3-27
Mirrors ........................................................................\
....... 3-28 Inside mirror .............................................................. 3-28
Outside mirrors ......................................................... 3-29
Vanity mirror ............................................................ 3-30
Automatic drive positioner ......................................... 3-30 Entry/exit function ................................................. 3-30
Memory storage ....................................................... 3-31
System operation ..................................................... 3-32

.The entry/exit function is not in opera-
tion.
. The following switches are not operated.
— Seat memory switches
— Power seat switches
— Electric tilting/telescopic steering wheel switch
The entry/exit function can be activated or
canceled by pushing and holding the SET
switch for more than 10 seconds.
The entry/exit function can also be acti-
vated or canceled if the [Lift Steering Wheel
on Exit] or [Slide Driver Seat Back on Exit]
key is switched to ON or OFF in the
[Settings] menu on the lower display. (See
the Infiniti InTouch Owner’s Manual.)
Initialize entry/exit function
If the battery cable is disconnected, or if the
fuse opens, the entry/exit function will not
work though this function was set on before.
In such a case, after connecting the battery
or replacing with a new fuse, open and close
the driver’s door more than two times after
the ignition switch is switched from the ON
position to the LOCK position. The entry/
exit function will be activated.
JVP0240X
MEMORY STORAGE
Two positions for the driver’s seat, steering
column and outside mirrors can be stored in
the automatic drive positioner memory.
Follow these procedures to use the memory
system.
1. Adjust the driver’s seat, steering column and outside mirrors to the desired posi-
tions by manually operating each adjust-
ing switch. For additional information,
see “Seats” (P.1-2), “Tilt/telescopic
steering” (P.3-27) and “Outside mirrors”
(P.3-29).
2. Push the SET switch and, within 5 seconds, push the memory switch (1 or 2) fully for at least 1 second.
The indicator light for the pushed mem-
ory switch will stay on for approximately
5 seconds after pushing the switch.
When the memory is stored in the
memory switch (1 or 2), a buzzer will
sound.
If memory is stored in the same memory
switch, the previous memory will be
deleted.
Confirming memory storage
Push the SET switch. If the main memory
has not been stored, the indicator light will
come on for approximately 0.5 seconds.
When the memory has stored in position,
the indicator light will stay on for approxi-
mately 5 seconds.
Selecting the memorized position
1. Move the shift lever to the P (Park)
position.
2. Push the memory switch (1 or 2) fully for at least 1 second.
The driver’s seat, steering column and
outside mirrors will move to the memor-
ized position with the indicator light
flashing, and then the light will stay on
for approximately 5 seconds.
Pre-driving checks and adjustments3-31

3-32Pre-driving checks and adjustments
Linking log-in function to a stored
memory position
The log-in function can be linked to a stored
memory position with the following proce-
dure.
1. Place the ignition switch in the ONposition while carrying an Intelligent
Key that was registered to the vehicle
with the log-in function. For more de-
tails, see “Log-in function” (P.3-15).
2. Adjust the position of the driver’s seat, steering column and outside mirrors
manually. See “Seats” (P.1-2), “Tilt/tele-
scopic steering” (P.3-27) and “Outside
mirrors” (P.3-29).
3. Place the ignition switch in the OFF position.
The next time you log in (selecting the user
on the display) after placing the ignition
switch in the ON position while carrying the
Intelligent Key, the system will automatically
adjust to the memorized driving position.
SYSTEM OPERATION
The automatic drive positioner system will
not work or will stop operating under the
following conditions:
. When the vehicle speed is above 0 MPH
(0 km/h) or 4 MPH (7 km/h) for some
limited functions such linking an Intelli- gent Key to the vehicle when the power
source is turned on from off or during the
Exit function.
. When any of the memory switches are
pushed while the automatic drive posi-
tioner is operating.
. When the adjusting switch for the dri-
ver’s seat and steering column is turned
on while the automatic drive positioner is
operating.
. When the seat has already been moved
to the memorized position.
. When no seat position is stored in the
memory switch.
. When the shift lever is moved from the P
(Park) position to any other position.

System maintenance .............................................. 5-120
Break-in schedule .......................................................... 5-121
Fuel Efficient Driving Tips .......................................... 5-121
Increasing fuel economy .............................................. 5-122
Intelligent All-Wheel Drive (AWD) (if
so equipped) .................................................................... 5-123
Parking/parking on hills .............................................. 5-125
Power steering ............................................................... 5-126 Direct Adaptive Steering type .............................. 5-126
Brake system ................................................................. 5-128 Braking precautions ............................................... 5-128
Parking brake break-in ........................................... 5-129
Brake assist ..................................................................... 5-129 Brake assist ............................................................... 5-129
Anti-lock Braking System (ABS) .......................... 5-129
Vehicle Dynamic Control (VDC) system ................ 5-130 Rise-up and build-up .............................................. 5-131
Brake force distribution ......................................... 5-131 Active trace control ...................................................... 5-132
Hill Start Assist system .............................................. 5-134
Chassis control ............................................................. 5-134
Cold weather driving ................................................... 5-135
Freeing a frozen door lock .................................. 5-135
Antifreeze ................................................................. 5-135
12-volt Battery ....................................................... 5-135
Draining of coolant water ................................... 5-135
Tire equipment ........................................................ 5-135
Special winter equipment .................................... 5-135
Driving on snow or ice .......................................... 5-135
Engine block heater (if so equipped) ............... 5-136
Active noise cancellation/Active
sound enhancement ..................................................... 5-137
Active noise cancellation ..................................... 5-137
Active sound enhancement ................................. 5-137

5-126Starting and driving
the road so the vehicle will move away
from the center of the road if it
moves.
4. Push the ignition switch to the OFF position.DIRECT ADAPTIVE STEERING
TYPE
WARNING
.When the power steering warning
light illuminates with the INFINITI
Direct Response Hybrid
®System run-
ning, the power assist for the steer-
ing will cease operation. You will still
have control of the vehicle, but the
steering will be harder to operate.
. If wheels or tires other than the
INFINITI recommended ones are
used, Direct Adaptive Steering may
not operate properly and the power
steering warning light may illumi-
nate.
. Do not modify the vehicle’s suspen-
sion. If suspension parts such as
shock absorbers, struts, springs, sta-
bilizer bars, bushings and wheels are
not INFINITI recommended for your
vehicle or are extremely deteriorated,
Direct Adaptive Steering may not
operate properly and the power
steering warning light may illumi-
nate.
. Do not modify the vehicle’s steering.
If steering parts are not INFINITI recommended for your vehicle or are
extremely deteriorated, Direct Adap-
tive Steering may not operate prop-
erly and the power steering warning
light may illuminate.
. If the VDC warning light illuminates,
the power steering warning light may
also illuminate at the same time. Stop
the vehicle in a safe location, turn the
hybrid system off and restart the
hybrid system. If the power steering
warning light continues to illuminate,
have the system checked. It is recom-
mended you visit an INFINITI retailer
for this service. For the VDC system,
see “Vehicle Dynamic Control (VDC)
system” (P.5-130).
CAUTION
.Do not place the ignition switch is in
the ON position while the steering
wheel or a tire is removed.
. Do not turn the steering wheel as
much as possible while the ignition
switch is in any position other than
the ON position.
. Installing an accessory on the steer-
ing wheel, or changing the steering
POWER STEERING

wheel, may reduce the steering per-
formance.
Direct Adaptive Steering is designed to
control the steering force and steering angle
according to the vehicle speed and amount
of turning of the steering wheel.
The steering characteristic can be selected
using the INFINITI Drive Mode Selector. See
“INFINITI Drive Mode Selector” (P.5-21).
If the VDC system is turned off, the setting
of steering becomes Standard mode.
If the power steering warning light illumi-
nates while the hybrid system is running, it
may indicate that Direct Adaptive Steering is
not functioning properly and may need
servicing. It is recommended you have the
system checked by an INFINITI retailer. (See
“Power steering warning light” (P.2-14).)
When the power steering warning light
illuminates with the hybrid system running,
the power assist for the steering will cease
operation. You will still have control of the
vehicle. However, greater steering effort will
be needed, especially in sharp turns and at
low speeds.
If Direct Adaptive Steering is malfunction-
ing, the steering wheel may turn slightly even
when driving on a straight road.
Under the following conditions, the steering wheel may turn slightly even when driving on
a straight road. This is due to a protection
mechanism for Direct Adaptive Steering. The
steering wheel will return to the normal
position after the protection mechanism is
deactivated.
Condition A
.
When the engine is stalled or likely to be
stalled
. When the steering wheel is held in the full
lock position or when the front tire
touches an obstruction.
. When the battery is discharged
To return the steering wheel to the normal
position, stop the vehicle in a safe location
and stop operating the steering wheel. Then
drive the vehicle for a short period of time.
Condition B
. When the steering wheel is operated
repeatedly or continuously while parking
or driving at a very low speed. In this
case, the power assist for the steering
wheel will be reduced.
To return the steering wheel to the normal
position, stop the vehicle in a safe location
and wait for a period of time, without
operating the steering wheel, until the
temperature of Direct Adaptive Steering
cools down. Avoid repeated steering wheel
operations that could cause Direct Adaptive
Steering to overheat. When the vehicle is tested on the 2-wheel
dynamometer, the power steering warning
light may illuminate. To turn off the power
steering warning light, stop the vehicle in a
safe location, turn the hybrid system off,
restart the hybrid system, and then drive the
vehicle for a period of time.
The following conditions do not indicate a
malfunction of Direct Adaptive Steering.
.
You may notice wider steering play when
the ignition switch is in the OFF or ACC
position compared to when it is in the
ON position.
. After the hybrid system is started, the
steering wheel may turn slightly even
when driving on a straight road. To
return to the normal position, drive the
vehicle on a straight road for a period of
time.
. After the hybrid system is started, the
steering wheel may move if the steering
wheel was turned to the fully locked
position while the ignition switch was in
the OFF position.
. After the vehicle is tested on the 4-wheel
dynamometer, the steering wheel may
turn slightly even when driving on a
straight road. To return the steering
wheel to the normal position, drive the
vehicle on a straight road for a period of
time.
Starting and driving5-127

5-128Starting and driving
You may hear a noise under the following
conditions. However, this is not a malfunc-
tion.
.When the hybrid system is started or
stopped.
. When the steering wheel is turned in the
full lock position.BRAKING PRECAUTIONS
This vehicle is equipped with two braking
systems.
. Hydraulic brake system
. Regenerative brake system
Hydraulic brake system
The brake system has two separate hydrau-
lic circuits. If one circuit malfunctions, you
will still have braking at two wheels.
Regenerative brake system
See “Regenerative brake” (P.Hybrid System-
8).
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.
WARNING
.While driving on a slippery surface,
be careful when braking, accelerating
or downshifting. Abrupt braking or
accelerating could cause the wheels
to skid and result in an accident.
. If the INFINITI Direct Response Hy-
brid
®System is not running or is
turned off while driving, the power
assist for the brakes will be limited.
Braking will be harder.
CAUTION
You may hear a operational noise when
the brake pedal is depressed. This is not a
malfunction.
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
BRAKE SYSTEM

5-130Starting and driving
Using the system
Depress the brake pedal and hold it down.
Depress the brake pedal with firm steady
pressure, but do not pump the brakes. The
ABS will operate to prevent the wheels from
locking up. Steer the vehicle to avoid
obstacles.
WARNING
Do not pump the brake pedal. Doing so
may result in increased stopping dis-
tances.
Self-test feature
The ABS includes electronic sensors, electric
pumps, hydraulic solenoids and a computer.
The computer has a built-in diagnostic
feature that tests the system each time you
start the hybrid system and move the vehicle
at a low speed in forward or reverse. When
the self-test occurs, you may hear a “clunk”
noise and/or feel a pulsation in the brake
pedal. This is normal and does not indicate a
malfunction. If the computer senses a mal-
function, it switches the ABS off and
illuminates the ABS warning light on the
instrument panel. The brake system then
operates normally, but without anti-lock
assistance.If the ABS warning light illuminates during
the self-test or while driving, have the
vehicle checked. It is recommended you visit
an INFINITI retailer for this service.
Normal operation
The ABS operates at speeds above 3 to 6
MPH (5 to 10 km/h).
When the ABS senses that one or more
wheels are close to locking up, the actuator
rapidly applies and releases hydraulic pres-
sure. This action is similar to pumping the
brakes very quickly. You may feel a pulsation
in the brake pedal and hear a noise from
under the hood or feel a vibration from the
actuator when it is operating. This is normal
and indicates that the ABS is operating
properly. However, the pulsation may indi-
cate that road conditions are hazardous and
extra care is required while driving.
The Vehicle Dynamic Control (VDC) system
uses various sensors to monitor driver inputs
and vehicle motion. Under certain driving
conditions, the VDC system helps to perform
the following functions.
.
Controls brake pressure to reduce wheel
slip on one slipping drive wheel so power
is transferred to a non slipping drive
wheel on the same axle.
. Controls brake pressure and engine or
motor output to reduce drive wheel slip
based on vehicle speed (traction control
function).
. Controls brake pressure at individual
wheels and engine or motor output to
help the driver maintain control of the
vehicle in the following conditions:
— understeer (vehicle tends to not follow the steered path despite increased
steering input)
— oversteer (vehicle tends to spin due to certain road or driving conditions).
The VDC system can help the driver to
maintain control of the vehicle, but it cannot
prevent loss of vehicle control in all driving
situations.
When the VDC system operates, the VDC
warning light
in the instrument panel
flashes so note the following:
. The road may be slippery or the system
may determine some action is required to
VEHICLE DYNAMIC CONTROL
(VDC) SYSTEM