Lexus NX: Parking Support Brake function (for static objects)

When a collision may occur with a static object while parking or traveling at low speeds, when the vehicle suddenly moves forward due to mistaken accelerator pedal operation, or when the vehicle moves due to the shift lever being in the wrong position, the sensors detect static objects to the front or rear in the traveling direction of the vehicle, and the system operates to lessen impact with static objects such as walls, and reduce resulting damage.

Examples of system operation

The system operates in the following situations when a static object is detected in the traveling direction of the vehicle.

■ The vehicle is driven at low speeds and the brake pedal is not depressed, or is depressed too late

■ The accelerator pedal is depressed too far

■ When the shift lever is mistakenly in D and the vehicle moves forward

WARNING

■For safe use Do not rely solely upon the system. Relying solely upon the system may lead to an unexpected accident.

• Driving safely is the sole responsibility of the driver. Pay careful attention to the surrounding conditions in order to ensure safe driving. The Parking Support Brake function (for static objects) can provide support to lessen the severity of collisions. However, it may not operate depending on the situation.
• The Parking Support Brake function (for static objects) is not a system designed to completely stop the vehicle.

  Furthermore, even if the Parking Support Brake function (for static objects) is able to stop the vehicle, brake control is canceled after approximately 2 seconds, so depress the brake pedal immediately.

Sensor positions and types

■ Sensor positions and types

1. Front corner sensors
2. Front center sensors
3. Rear corner sensors
4. Rear center sensors

NOTICE

■Preventing sensor malfunctions

• If the area around a sensor is subjected to an impact, equipment may not operate properly due to a sensor malfunction.

  Have the vehicle inspected by your Lexus dealer.

• When using a high-pressure washer to wash the vehicle, do not spray water directly on the sensors. The sensors may not function properly if subjected to an impact from strong water pressure.
• When using steam to wash the vehicle, do not direct steam too close to the sensors. The sensors may not function properly if subjected to steam.

Changing settings of the Parking Support Brake function (for static objects)

This system can be enabled/disabled on the multi-information display.

1. Press " " or " " of the meter control switches and select .

2. Press " " or " " of the meter control switches and select .

3. Press on the meter control switches to enable/disable the system.

The PKSB OFF indicator comes on when the Parking Support Brake function is OFF (not operating).

When the Parking Support Brake function is switched OFF, system operation does not resume until the function is switched back ON through the settings screen on the multi-information display. (System operation does not resume by operating the power switch.)

Operation

■ Hybrid system output restraint control When there is a static object, where a potential collision may occur, is detected, the increase of the vehicle speed is restrained due to hybrid system output being controlled.

1. Accelerator pedal
2. Brake pedal
3. Hybrid system output
4. Braking force
5. ON
6. OFF
7. Control starts
8. Collision is likely
9. DOWN
10. "BRAKE!" is displayed in the multi-information display
11. "Switch to Brake" is displayed in the multi-information display

■ Brake Control If the accelerator is continuously depressed even after the hybrid system output is being controlled, the brakes are engaged and the vehicle decelerates.

1. Accelerator pedal
2. Brake pedal
3. Hybrid system output
4. Braking force
5. ON
6. OFF
7. Control starts
8. Collision is likely
9. DOWN
10. Collision possibility is very high
11. UP
12. "BRAKE!" is displayed in the multi-information display
13. "Switch to Brake" is displayed in the multi-information display

■Operation starting conditions When the PKSB OFF indicator is not illuminated or flashing and all of the following conditions are met, the system operates.

• Hybrid system output restriction control
  • The Parking Support Brake function (for static objects) is on.
  • The vehicle speed is 10 mph (15 km/h) or less.
  • There is a static object in the traveling direction of the vehicle (6 to 13 ft. [2 to 4 m] ahead).
  • The system determined that a strongerthan-normal brake operation was necessary to avoid a collision.
• Brake control
  • Hybrid system output restriction control is being performed.
  • The system determined that an emergency brake operation was necessary to avoid a collision.

■Operation ending conditions In any of the following situations, the system stops operating.

• Hybrid system output restriction control
  • The Parking Support Brake function (for static objects) has been turned off (stopped).
  • The collision became avoidable with normal brake operation.
  • The static object is no longer in the traveling direction of the vehicle (6 to 13 ft. [2 to 4 m] ahead).
• Brake control
  • The Parking Support Brake function (for static objects) has been turned off (stopped).
  • Approximately 2 seconds elapsed after the vehicle was stopped by brake control.
  • The brake pedal was depressed after the vehicle was stopped by brake control.
  • The static object is no longer in the traveling direction of the vehicle (6 to 13 ft. [2 to 4 m] ahead).

■Sensor detection range The detection range of the Parking Support Brake function (for static objects) differs from the detection range of the clearance sonar.

Therefore, even if the clearance sonar detects a static object and provides a warning, the Parking Support Brake function (for static objects) may not start operating.

■Static objects not detected by the sensors The following static objects may not be detected by the sensors.

• Objects such as people, cloth and snow, that are difficult for sonic waves to reflect off of. (In particular, people may also not be detected depending on the type of clothing they are wearing.)
• Objects not perpendicular with the ground, objects not at a right angle to the traveling direction of the vehicle, uneven objects or waving objects
• Low objects
• Thin objects such as wires, fences, ropes and signposts
• Objects that are extremely close to the bumper

■Situations in which the Parking Support Brake function (for static objects) may not operate When driving with the shift lever in N

■Situations when the system may operate even though there is no possibility of a collision In the following situations, the system may operate even though there is no possibility of a collision.

• Environmental influence

• The vehicle is driven on a narrow road

• The vehicle is driven on a gravel road or in an area with tall grass

• The vehicle is driven toward a banner or flag, a low-hanging branch or a boom barrier (such as those used at railroad crossings, toll gates and parking lots).
• There is a static object on the shoulder of the road (when the vehicle is driven in a narrow tunnel, on a narrow bridge or on a narrow road)
• The vehicle is being parallel parked
• There is a rut or hole in the surface of the road
• When the vehicle is driven on a metal cover (grating), such as those used for drainage ditches
• The vehicle is driven on a steep slope
• The sensor is covered by water on a flooded road

• Influence from the weather

• Ice, snow, dirt, etc., has adhered to the sensor (if removed, the system returns to normal)
• Heavy rain or water strikes the vehicle
• In severe weather such as fog, snow or a sand storm

• Influence from other sonic waves

• An ultrasonic wave source is nearby, such as the horn or clearance sonar of another vehicle, a vehicle detector, a motorcycle engine or the air brake of a large vehicle
• Electronic components (such as a backlit license plate (especially fluorescent types), fog lights, a fender pole or a wireless antenna) are installed near the sensors

• Changes in the vehicle

• The vehicle is tilted a large amount
• The height of the vehicle has drastically changed due to the carried load (the nose tilts up or down)
• The direction of the sensor has deviated due to a collision or other impact

■Situations in which the system may not operate normally In the following situations, the system may not operate normally.

• Environmental influence

• There is a static object that cannot be detected between the vehicle and another static object that can be detected
• A static object such as another vehicle, a motorcycle, a bicycle or a pedestrian cuts in front of the vehicle or jumps out from the side.

• Influence from the weather

• The area around the sensor is extremely hot or cold

• The wind is strong

• Ice, snow, dirt, etc., has adhered to the sensor (if removed, the system returns to normal)
• Heavy rain or water strikes the vehicle
• In severe weather such as fog, snow or a sand storm

• Influence from other sonic waves

• An ultrasonic wave source is nearby, such as the horn or clearance sonar of another vehicle, a vehicle detector, a motorcycle engine or the air brake of a large vehicle
• Electronic components (such as a backlit license plate (especially fluorescent types), fog lights, a fender pole or a wireless antenna) are installed near the sensors

• Changes in the vehicle

• The vehicle is tilted a large amount
• The height of the vehicle has drastically changed due to the carried load (the nose tilts up or down)
• The direction of the sensor has deviated due to a collision or other impact

■When "Parking Support Brake Unavailable" is displayed on the multi-information display and the PKSB OFF indicator flashes

• Ice, snow, dirt, etc., may have adhered to the sensor. If this occurs, remove the ice, snow, dirt, etc., from the sensor to return the system to normal.

  Also, a warning message may be displayed at low temperatures due to ice forming on the sensor, and the sensor may not detect static objects. Once the ice melts, the system will return to normal.

• If this message is shown even after removing dirt from the sensor, or shown when the sensor was not dirty to begin with, have the vehicle inspected by your Lexus dealer.
• System initialization may not have been performed after removal and installation of the 12-volt battery. Perform system initialization.

■When removing and installing the 12- volt battery The system needs to be initialized.

The system can be initialized by driving the vehicle straight ahead for 5 seconds or more at a speed of approximately 22 mph (35 km/h) or higher.

■When "Parking Support Brake Malfunction Visit Your Dealer" is displayed on the multi-information display, the PKSB OFF indicator flashes and the buzzer sounds The system may not be operating properly.

Have the vehicle inspected by your Lexus dealer.

WARNING

■In order for the system to operate properly Make sure to observe the following precautions regarding the sensors. Failure to observe these precautions may cause the sensors not to operate properly, and may result in an unexpected accident.

• Do not perform work such as modification, disassembly or painting
• Only perform replacements using genuine parts
• Do not subject the area around the sensors to any impacts
• Do not damage the sensors, and always keep them clean

■Handling the suspension Do not modify the suspension, as changes to the height or incline of the vehicle may prevent the sensors from correctly detecting static objects, may cause the system not operate, or may cause the system to operate unnecessarily.

NOTICE

■Preventing unnecessary operation In the following situations, turn the Parking Support Brake function (for static objects) OFF. The system may operate even though there is no possibility of a collision.

• A chassis roller, chassis dynamo, free roller or similar equipment is being used for an inspection, etc.
• The vehicle is being loaded onto a ship, truck or other transport vessel
• The suspension has been lowered or tires that have a different size than the genuine tires are equipped
• The height of the vehicle has drastically changed due to the carried load (the nose tilts up or down).
• A towing hook is installed
• When using an automatic car wash

Display and buzzer for hybrid system output restriction control and brake control

When the hybrid system output restriction control or brake control operates, the buzzer sounds and a message is displayed on the multi-information display, head-up display and navigation/ multimedia system screen to alert the driver.

Depending on the situation, output restriction control operates to either limit acceleration or restrict output as much as possible.

■ Hybrid system output restriction control is operating (acceleration limitation control)

■ Hybrid system output restriction control is operating (control to restrict output as much as possible)

■ Brake control is operating

■ The vehicle is stopped by system operation

*: If the accelerator pedal is not depressed, "Press Brake Pedal" will be displayed.

■System operation When the vehicle is stopped by system operation, the Parking Support Brake function (for static objects) stops and the PKSB OFF indicator illuminates.

■System recovery When the Parking Support Brake function (for static objects) is stopped by system operation and you would like to resume operation, either turn the Parking Support Brake function (for static objects) ON again , or turn the power switch off and then back on. Furthermore, when the vehicle moves with a static object no longer in the traveling direction of the vehicle, or when the traveling direction of the vehicle changes (such as when switching from moving forward to backing up, and vice versa), system operation automatically resumes.

■Clearance sonar buzzer Regardless of whether the clearance sonar is on or off, if the Parking Support Brake function (for static objects) is not stopped , when the front or rear sensors detect a static object and brake control is performed, the clearance sonar buzzer also sounds and a notification of the approximate distance to the static object is provided.

■In the unlikely event that the Parking Support Brake function (for static objects) mistakenly operates at a crossing or elsewhere Even in the unlikely event that the Parking Support Brake function (for static objects) mistakenly operates at a crossing or elsewhere, brake control is canceled after approximately 2 seconds, allowing you to proceed forward and leave the area. Furthermore, brake control is also canceled when the brake pedal is depressed.

Depressing the accelerator pedal again allows you to proceed forward and leave the area.

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