stop start LEXUS RX200T 2017 Workshop Manual

3514-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
■Air conditioning system while the engine is stopped by the Stop & Start system
●If the air conditioning system is being used in automatic mode, the fan speed may be reduced or the fan may be stopped while the engine is stopped by the Stop & Start sys-
tem in order to reduce changes in the cabin temperature.
●To ensure air conditioning system performanc e when the vehicle is stopped, disable the Stop & Start system by pressing the Stop & Start cancel switch.
■Changing the idling stop time with the air conditioning system on
The length of time the Stop & Start system will operate when the air conditioning system
is on can be changed on the ( P. 109) or (P. 110). (The length of time the Stop
& Start system will operate when the air condit ioning system is off cannot be changed.)
■The Stop & Start system protection function
●When an excessively loud sound is being projected by the audio system, the audio sys- tem may be automatically cut off in order to reduce battery consumption. If this occurs,
turn the engine switch off, wait for 3 seconds or longer and then turn it to ACCES- SORY mode or IGNITION ON mode to re-enable the audio system.
●The audio system may not be activated when the battery terminals are disconnected
and then reconnected. If this occurs, turn the engine switch off and then repeat the fol- lowing operation twice to activate the audio system normally.
• Turn the engine switch to IGNITION ON mode and then to OFF.
■Replacing the battery
 P. 717
■Displaying the Stop & Start system status
 P. 109

3524-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
■Multi-information display messages
If the following situations, and a message may be displayed on the multi-information
display.
●When the engine cannot be stopped by the Stop & Start system
MessageDetails
“Depress Brake
Firmly to Activate”
The brake pedal is not depressed enough.
If the brake pedal is depressed further, the system
will operate.
“For Climate Control”
• The air conditioning system is being used when the ambient temperature is high or low.
If the difference between the set temperature and
cabin temperature is small, the system will be
enabled.
• is ON.
“Battery Charging”
• The battery charge amount may be low. Engine stop is temporarily prohibited to prioritize
charging of the battery, but if the engine is operated
for a short while, engine stop is allowed.
• A refresh charge may be occurring, such as when the battery is undergoing a periodic recharge, for a
while after the battery terminals have been discon-
nected and reconnected, for a while after the bat-
tery has been replaced, etc.
After a refresh charge of approximately 5 to 60 min-
utes completes, the system can be operated.
• If the message is displayed continuously (more than 60 minutes), the battery may be deteriorated. Con-
tact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional for
details.
“For Brake System”
• The vehicle is being driven in a high altitude area.
• The brake booster vacuum is low. When the brake booster vacuum reaches a prede-
termined level, the system will be enabled.
“Steering Wheel
Turned”
The steering wheel has been operated.
“Driver Seat Belt
Unbuckled”
The driver seat belt is not fastened.
“Stop & Start Unavail-
able”
• The Stop & Start system is temporarily disabled. Operate the engine for a short while.
• The engine may have been started with the hood open.
Close the hood, turn the engine switch off, wait for
30 seconds or more, and then start the engine.

3534-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
●When the engine automatically restarts while stopped by the Stop & Start system
■If “Stop & Start System Malfunction Visit Your Dealer” is displayed on the multi-infor-
mation display
The system may be malfunctioning. Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
■If the Stop & Start cancel indicator continues to flash
The system may be malfunctioning. Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
“System Temperature
Low”
The battery may be cold. Operate the engine for a short while allows the sys-
tem to recover due to the temperature increase in
the engine compartment.
“System Temperature
High”
The battery may be extremely hot. If the engine compartment is allowed to cool suffi-
ciently, the system will recover.
“Non-Dedicated Bat-
tery”
A non-dedicated battery for the Stop & Start system
may have been installed. The Stop & Start system does not operate. Have the
vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped pro-
fessional.
MessageDetails
MessageDetails
“For Climate Control”
• The air conditioning system has been turned on or is being used.
• has been turned on.
“For Brake System”
The brake pedal has been depressed further or
pumped. The system will be enabled after the engine runs and
the brake booster vacuum reaches a predetermined
level.
“Battery Charging”
The battery charge may have become low. The engine is restarted to prioritize battery charging.
Operating the engine for a short while allows the
system to recover.
“Steering Wheel
Turned”
The steering wheel was operated.
“Driver Seat Belt
Unbuckled”
The driver seat belt has been unfastened.

3544-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
WARNING
■When the Stop & Start system is operating
●Depress the brake pedal and apply the parking brake when necessary while the engine is stopped by the Stop & Start system (while the Stop & Start indicator is on).
(Except when the brake hold system is operating or when the vehicle comes to a con- trolled stop while driving with the dynamic radar cruise control with full-speed range in vehicle-to-vehicle distan ce control mode [if equipped])
●Do not allow anyone to leave the vehicle while the engine is stopped by the Stop & Start system (while the Stop & Start indicator is on).An accident may occur due to the automatic engine start function.
●Ensure that the engine is not stopped by the Stop & Start system while the vehicle is ina poorly ventilated area. The engine may restart due to the automatic engine startfunction, causing exhaust gases to collect and enter the vehicle, possibly resulting in
death or a serious health hazard.
NOTICE
■To ensure the system operates correctly
If any of the following situations occur, the Stop & Start system may not operate cor- rectly. Have your vehicle inspected by any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
●While the driver's seat belt is fastened, the driver's and front passenger's seat belt reminder light flashes.
●Even though the driver's seat belt is not fastened, the driver's and front passenger'sseat belt reminder light does not illuminate.
●Even though the driver's door is closed, the open door warning is displayed on the
multi-information display or the interior lig ht is illuminated when door linked illumina- tion is enabled ( P. 553).
●Even though the driver's door is open, the open door warning is not displayed on the
multi-information display or the interior light does not illuminate when door linked illumination is enabled ( P. 553).

3644-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
■Conditions under which the BSM function may not function correctly
●The BSM function may not detect vehicles correctly in the following situations:
• When the sensor is misaligned due to a strong impact to the sensor or its surround-
ing area • When mud, snow, ice, a sticker, etc. is covering the sensor or surrounding area onthe rear bumper
• When driving on a road surface that is wet with standing water during bad weather, such as heavy rain, snow, or fog• When multiple vehicles are approaching wi th only a small gap between each vehicle
• When the distance between your vehicle and a following vehicle is short • When there is a significant difference in speed between your vehicle and the vehiclethat enters the detection area
• When the difference in speed between your vehicle and another vehicle is changing • When a vehicle enters a detection area traveling at about the same speed as yourvehicle
• As your vehicle starts from a stop, a vehicle remains in the detection area • When driving up and down consecutive steep inclines, such as hills, dips in the road, etc.
• When driving on roads with sharp bends, consecutive curves, or uneven surfaces • When vehicle lanes are wide, or when driving on the edge of a lane, and the vehiclein an adjacent lane is far away from your vehicle
• When towing a trailer (vehicles with towing package) • When items such as a bicycle carrier are installed on the rear of the vehicle• When there is a significant difference in height between your vehicle and the vehicle
that enters the detection area • Immediately after the BSM function is turned on
●Instances of the BSM function unnecessarily detecting a vehicle and/or object mayincrease in the following situations:
• When the sensor is misaligned due to a strong impact to the sensor or its surround- ing area• When the distance between your vehicle and a guardrail, wall, etc. that enters the
detection area is short • When driving up and down consecutive steep inclines, such as hills, dips in the road, etc.
• When vehicle lanes are narrow, or when driving on the edge of a lane, and a vehicle traveling in a lane other than the adjacent lanes enters the detection area• When driving on roads with sharp bends, consecutive curves, or uneven surfaces
• When the tires are slipping or spinning • When the distance between your vehicle and a following vehicle is short• When a bicycle carrier or other accessory is installed to the rear of the vehicle
• When towing a trailer (vehicles with towing package)

3874-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
■The Intelligent Clearance Sonar function will operate when
The function will operate when the ICS OFF indicator is not illuminated or flashing ( P. 383, 391) and all of the following conditions are met:
●Engine output restriction control
• The Intelligent Clearance Sonar system is enabled. • The vehicle speed is 15 km/h (10 mph) or less.• There is an object in the traveling directio n of the vehicle and 2 to 4 m (6 to 13 ft.)
away. • The system determines that a stronger-than-normal brake operation is necessary toavoid a collision.
●Brake control
• Engine output restriction control is operating.
• The system determines that an emergency brake operation is necessary to avoid a collision.
■The Intelligent Clearance Sonar function will stop operating when
The function will stop operating if an y of the following conditions are met:
●Engine output restriction control
• The Intelligent Clearance Sonar system is disabled.
• The collision becomes avoidable with normal brake operation. • The object is no longer 2 to 4 m (6 to 13 ft.) away in the traveling direction of thevehicle.
●Brake control
• The Intelligent Clearance Sonar system is disabled.
• Approximately 2 seconds elapse after the vehicle is stopped by brake control. • The brake pedal is depressed after the vehicle is stopped by brake control.• The object is no longer 2 to 4 m (6 to 13 ft.) away in the traveling direction of the
vehicle.
■Detection range of the Intelligent Clearance Sonar function
The detection range of the Intelligent Clearance Sonar function differs from the detec-
tion range of the Lexus parking assist-sensor ( P. 375).
Therefore, even if the Lexus parking assist-s ensor detects an object and provides a warn- ing, the Intelligent Clearance Sonar function may not start operating.
■If the Intelligent Clearance Sonar function has operated
If the vehicle is stopped due to operation of the Intelligent Clearance Sonar function, the Intelligent Clearance Sonar system will be disa bled and the ICS OFF indicator will illumi-
nate.

3964-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
■The Rear Crossing Traffic Auto Brake function will operate when
The function will operate when the ICS OFF indicator is not illuminated or flashing ( P. 383, 391) and all of the following conditions are met:
●Engine output restriction control
• The Intelligent Clearance Sonar with Rear Crossing Traffic Auto Brake is enabled. • The vehicle speed is 15 km/h (10 mph) or less.• The shift lever is in R.
• The system determines that a stronger than normal brake operation is necessary to avoid a collision with an approaching vehicle.
●Brake control
• Engine output restriction control is operating. • The system determines that an emergency brake operation is necessary to avoid a
collision with an approaching vehicle.
■The Rear Crossing Traffic Auto Brake function will stop operating when
The function will stop operating if an y of the following conditions are met:
●Engine output restriction control
• The Intelligent Clearance Sonar with Rear Crossing Traffic Auto Brake is disabled. • The collision becomes avoidable with normal brake operation.
• A vehicle is no longer approaching from the right or left at the rear of the vehicle.
●Brake control
• The Intelligent Clearance Sonar with Rear Crossing Traffic Auto Brake is disabled. • Approximately 2 seconds elapse after the vehicle is stopped by brake control.• The brake pedal is depressed after the vehicle is stopped by brake control.
• A vehicle is no longer approaching from the right or left at the rear of the vehicle.
■Detection area of the Rear Cro ssing Traffic Auto Brake function
The detection area of the Rear Crossing Tr affic Auto Brake function differs from the
detection area of the RCTA function ( P. 367).
Therefore, even if the RCTA function detects a vehicle and provides an alert, the Rear Crossing Traffic Auto Brake function may not start operating.
■If the Rear Crossing Traffic Auto Brake function has operated
If the vehicle is stopped due to operation of the Rear Crossing Traffic Auto Brake func- tion, the Rear Crossing Traffic Auto Brake fu nction will be disabled and the ICS OFF indi-
cator will illuminate.

4224-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenly, or if the
brakes are applied while driving on a slippery road surface
◆Brake assist
Generates an increased level of braking force after the brake pedal is
depressed when the system detects a panic stop situation
◆VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or turning on
slippery road surfaces.
◆VSC + (Vehicle Stability Control +)
Provides cooperative control of the ABS, TRC, VSC and EPS.
Helps to maintain directional stability when swerving on slippery road sur-
faces by controlling steering performance.
◆Trailer Sway Control
Helps the driver to control trailer sway by selectively applying brake pressure
for individual wheels and reducing driving torque when trailer sway is
detected.
◆TRC (Traction Control)
Helps to maintain drive power and prevent the drive wheels from spinning
when starting the vehicle or accelerating on slippery roads
◆Hill-start assist control
Helps to reduce the backward movement of the vehicle when starting on an
uphill
Driving assist systems
To help enhance driving safety and performance, the following systems oper-
ate automatically in response to various driving situations. Be aware, however,
that these systems are suppl ementary and should not be relied upon too heav-
ily when operating the vehicle.

4234-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
◆EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn the
steering wheel
◆Dynamic Torque Control AWD system (AWD models)
Automatically switches from front-wheel drive to all-wheel drive (AWD)
according to the driving conditions, helping to ensure reliable handling and
stability. Examples of conditions where the system will switch to AWD are
when cornering, going uphill, starting off or accelerating, and when the road
surface is slippery due to snow, rain, etc.
◆Adaptive Variable Suspension System (if equipped)
Controls the damping force of the shock absorber of each wheel according to
the road and driving conditions, helping achieve a comfortable ride, excellent
driveability and a high level of stability.
If SPORT S+ mode is selected using the driving mode select switch, the
damping force will become more suitable for sporty driving. ( P. 418)
◆VDIM (Vehicle Dynamics Integrated Management) (if equipped)
Provides integrated control of the ABS, brake assist, TRC, VSC, hill-start
assist control and EPS systems
Helps to maintain vehicle stability when swerving on slippery road surfaces by
controlling the brakes and engine output
◆Emergency brake signal
When the brakes are applie d suddenly, the stop lights automatically flash to
alert the vehicle behind.

4254-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
■Turning off both TRC and VSC systems
To turn the TRC and VSC systems off, pr ess and hold for more than 3 seconds
while the vehicle is stopped.
The VSC OFF indicator light will come on an d the “Traction Control Turned Off” will be
shown on the multi-information display.
*
Press again to turn the systems back on.
*: On vehicles with PCS (Pre-Crash Safety system), pre-crash brake assist and pre-
crash braking will also be disabled. ( P. 312)
■When the message is displayed on the mult i-information display showing that TRC has
been disabled even if the VSC OFF switch has not been pressed
TRC cannot be operated. Contact any authoriz ed Lexus dealer or repairer, or another
duly qualified and equipped professional.
■Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will operate:
●The shift lever is in a position other than P or N (when starting off forward/backward on
an upward incline).
●The vehicle is stopped
●The accelerator pedal is not depressed
●The parking brake is not engaged
■Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
●The shift lever is shifted to P or N
●The accelerator pedal is depressed
●The parking brake is engaged
●Approximately 2 seconds elapse after the brake pedal is released
■Sounds and vibrations caused by the ABS, brake assist, TRC, VSC and hill-start assist
control systems
●A sound may be heard from the engine compartment when the brake pedal is
depressed repeatedly, when the engine is st arted or just after the vehicle begins to
move. This sound does not indicate that a malfunction has occurred in any of these sys-
tems.
●Any of the following conditions may occu r when the above systems are operating.
None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
• The brake pedal may pulsate slig htly after the ABS is activated.
• The brake pedal may move down slig htly after the ABS is activated.
■EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.