Selecting conventional constant speed control mode

Lexus GX / Lexus GX Owners Manual / When driving / Using other driving systems / Dynamic radar cruise control / Selecting conventional constant speed control mode

Constant speed control mode differs from vehicle-to-vehicle distance control mode. When constant speed control mode is selected, your vehi- cle will maintain a set speed regardless of whether or not there are other vehicles in the lane ahead.

1. Press the “ON-OFF” button to activate the cruise control.

1. Press the “ON-OFF” button to activate the cruise control.

Press the button again to deacti- vate the cruise control.

2. Switch to constant speed con- trol mode. (Push the lever for- ward and hold for approximately 1 second.) Cruise control indicator will come on.

When in constant speed control mode, to return to vehicle-to-vehi- cle distance control mode, push the lever forward again and hold for approximately 1 second.

After the desired speed has been set, it is not possible to return to vehicle-to-vehicle distance control mode.

If the “ENGINE START STOP” switch is turned off and then turned to IGNITION ON mode again, the vehicle will automatically returns to vehicle-to-vehicle distance control mode.

Adjusting the speed setting:

Canceling and resuming the speed setting.

Dynamic radar cruise control can be set when

• The shift lever is in the D or range 4 or higher of S has been selected.

• Vehicle speed is above approximately 30 mph (50 km/h).

Accelerating after setting the vehicle speed

The vehicle can be accelerated normally. After acceleration, the set speed resumes. However, during vehicle-to-vehicle distance control mode, the vehicle speed may decrease below the set speed in order to maintain the distance to the vehicle ahead.

Automatic cancelation of vehicle-to-vehicle distance control

Vehicle-to-vehicle distance control driving is automatically canceled in the follow- ing situations:

• Actual vehicle speed falls below approximately 25 mph (40 km/h).

• VSC is activated.

• The sensor cannot operate correctly because it is covered in some way.

• The windshield wipers are operating at high speed (when the wiper switch is set to the “AUTO” mode or the high speed wiper operation position).

• When second start mode is set.

• Bad weather causes the detection function to become extremely unstable.

• Multi-terrain mode is selected other than OFF.

• The center differential lock/unlock is not completed within 5 seconds while the dynamic radar cruise control system is on.

If vehicle-to-vehicle distance control driving is automatically canceled for any other reason, there may be a malfunction in the system. Contact your Lexus dealer.

Automatic cancelation of constant speed control

The cruise control will stop maintaining the vehicle speed in the following situations:

• Actual vehicle speed is more than approximately 10 mph (16 km/h) below the set vehicle speed.

At this time, the memorized set speed is not retained.

• Vehicle speed falls below approximately 25 mph (40 km/h).

• VSC is activated.

• The center differential lock/unlock is not completed within 5 seconds while the dynamic radar cruise control system is on.

Radar sensor and grille cover

Always keep the sensor and grille cover clean to ensure that the vehicle-to-vehicle distance control operates properly. (Some obstructions, such as snow, ice or plastic objects, cannot be detected by the obstruction sensor.) Dynamic radar cruise control is canceled if an obstruction is detected.

1. Grille cover

1. Grille cover

2. Radar sensor

Warning lights and messages for dynamic radar cruise control

Warning lights and messages are used to indicate a system malfunction or to inform the driver of the need for caution while driving.

Certification

For vehicles sold in the U.S.A.

FCC ID: HYQDNMWR004

This device complies with Part 15 of the FCC Rules. Operation is subject to the fol- lowing two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

FCC WARNING

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Radio frequency radiation exposure Information:

This equipment complies with FCC radiation exposure limits set forth for an uncon- trolled environment.

This equipment should be installed and operated with minimum distance of 20 cm between the radiator (antenna) and your body.

This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

For vehicles sold in Canada

Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interfer- ence that may cause undesired operation of the device.

CAUTION

Before using dynamic radar cruise control

Do not overly rely on vehicle-to-vehicle distance control.

Be aware of the set speed. If automatic deceleration/acceleration is not appropri- ate, adjust the vehicle speed, as well as the distance between your vehicle and vehi- cles ahead by applying the brakes etc.

Cautions regarding the driving assist systems

Observe the following precautions.

Failure to do so may cause an accident resulting in death or serious injury.

• Assisting the driver to measure following distance

The dynamic radar cruise control is only intended to help the driver in determin- ing the following distance between the driver’s own vehicle and a designated vehicle traveling ahead. It is not a mechanism that allows careless or inattentive driving, and it is not a system that can assist the driver in low-visibility conditions. It is still necessary for driver to pay close attention to the vehicle’s surroundings.

• Assisting the driver to judge proper following distance

The dynamic radar cruise control determines whether the following distance between the driver’s own vehicle and a designated vehicle traveling ahead is appropriate or not. It is not capable of making any other type of judgement.

Therefore, it is absolutely necessary for the driver to remain vigilant and to deter- mine whether or not there is a possibility of danger in any given situation.

• Assisting the driver to operate the vehicle

The dynamic radar cruise control has no capability to prevent or avoid a collision with a vehicle traveling ahead. Therefore, if there is ever any danger, the driver must take immediate and direct control of the vehicle and act appropriately in order to ensure the safety of all involved.

CAUTION

To avoid inadvertent cruise control activation

Switch the cruise control off using the “ON-OFF” button when not in use.

Situations unsuitable for the dynamic radar cruise control

Do not use dynamic radar cruise control in any of the following situations.

Doing so may result in inappropriate speed control and could cause an accident resulting in death or serious injury.

• In heavy traffic

• On roads with sharp bends

• On winding roads

• On slippery roads, such as those covered with rain, ice or snow

• On steep downhills, or where there are sudden changes between sharp up and down gradients

Vehicle speed may exceed the set speed when driving down a steep hill.

• At entrances to expressways

• When weather conditions are bad enough that they may prevent the sensors from functioning correctly (fog, snow, sandstorm, heavy rain, etc.)

• When an approach warning buzzer is heard often

• When your vehicle is towing a trailer or during emergency towing

• In traffic conditions where the vehicle is repeatedly sped up and slowed down at frequent intervals

CAUTION

When the sensor may not be correctly detecting the vehicle ahead

Apply the brakes as necessary when any of the following types of vehicles are in front of you.

As the sensor may not be able to correctly detect these types of vehicles, the approach warning (→P. 261) will not be activated, and a fatal or serious accident may result.

• Vehicles that cut in suddenly

• Vehicles traveling at low speeds

• Vehicles that are not moving

• Vehicles with small rear ends (trailers with no load on board etc.)

• Motorcycles traveling in the same lane

Conditions under which the vehicle-to-vehicle distance control may not function correctly

Apply the brakes as necessary in the following conditions as the radar sensor may not be able to correctly detect vehicles ahead, and a fatal or serious accident may result:

• When water or snow thrown up by the surrounding vehicles hinders the function- ing of the sensor

• When your vehicle is pointing upwards (caused by a heavy load in the luggage compartment etc.)

• When the road curves or when the lanes are narrow

• When steering wheel operation or your position in the lane is unstable

• When the vehicle ahead of you decelerates suddenly

CAUTION

To ensure the sensor functions correctly

Do not do the following to the sensor or grille as doing so may cause the sensor not to function correctly and could result in an accident:

• Sticking or attaching anything to them

• Leaving them dirty

• Disassembling or subjecting them to strong shocks

• Modifying or painting them

• Replacing them with non-genuine parts

Handling the radar sensor

Observe the following to ensure the cruise control system can function effectively.

Otherwise, the system may not function correctly and could result in an accident.

• Keep the sensor and grille cover clean at all times.

Clean the sensor and grille cover with a soft cloth so you do not mark or damage them.

• Do not subject the sensor or surrounding area to a strong impact.

If the sensor moves even slightly off position, the system may malfunction. If the sensor or surrounding area is subject to a strong impact, always have the area inspected and adjusted by your Lexus dealer.

• Do not disassemble the sensor.

• Do not attach accessories or stickers to the sensor, grille cover or surrounding area.

• Do not modify or paint the sensor and grille cover.

• Do not replace them with non-genuine parts.

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