How does a battery work? A battery stores energy in chemical form that can be released on demand as electricity. This electrical power is used by the cars ignition system for cranking the engine. The car's battery also may power the lights and other accessories. Should the alternator belt fail, the battery might also need to power the vehicle's entire electrical system for a short period of time.
What should I consider when buying a battery? SIZE: What are the size dimensions of your original battery. POWER: See what your dealer recommends and check the power of your original battery. WARRANTY: See what automotive batteries are backed by a warranty package. Chose what is right for your vehicle's needs.
What can excessive heat do to a battery? Hot temperatures will deteriorate a battery's life quicker by evaporating the water from the electrolyte, and corroding and weakening the positive grids.
When I am replacing my battery, why is it important to remove the ground wire first? Before you begin, check the type of grounding system the vehicle has. If you remove the positive connector first in a negative ground system, you risk the chance of creating a spark. If you are working near the battery when this occurs, it could potentially create an ignition source that could cause the battery to explode. It's important to be aware that this scenario is possible and it's very important to remove the ground source first.
When my car won't start, how do I know for sure if my battery really needs to be replaced? Many variables can keep a vehicle from starting, its important to do some troubleshooting. We offer battery testing free of charge please contact us today for more information.
What is a maintenance-free battery? A maintenance-free battery is designed to capture and return evaporated fluids to the battery reservoir. Water may not be added because the battery cells are sealed closed.
*STARTING BATTERY PRICES ARE AS LOW AS $95.00 FOR MOST MODELS. CALL (786) 528-3747 FOR YOUR PARTICULAR MODEL*
The most important safety feature of an automobile is its brake system. The ability of a brake system to safely and repeatedly stop the vehicle is key to safe motoring. A clear understanding of the brake system is essential for anyone involved in servicing Lexus vehicles.
The basic principle of brake operation is the conversion of energy. Energy is the ability to do work. The most familiar forms of energy in automotive use are chemical, electrical, and mechanical. For example, starting an engine involves several conversions. Chemical energy in the battery is converted to electrical energy in the starter. Electrical energy is converted to mechanical energy in the starter as it cranks the engine.
Burning hydrocarbons and oxygen in the engine creates heat energy. Nothing can destroy energy; it can only be converted into another form of energy. Heat energy is converted into kinetic energy as the vehicle is put into motion. Kinetic energy is a fundamental form of mechanical energy; it is the energy of mass in motion.
Kinetic energy increases in direct proportion to weight increase, so if you double the weight, you double the kinetic energy. The increase in kinetic energy as it relates to speed is the square of the speed, so if speed is doubled, kinetic energy increases by a factor of four. If we triple the speed, kinetic energy is increased by nine times. This means that the heavier the vehicle and the faster the speed, the greater the kinetic energy that the brakes have to convert back to heat to bring the vehicle to a stop.
Friction is the resistance to movement between two objects in contact with each other. It also converts the energy of motion to heat. If we allow the vehicle to coast in neutral on a level surface, eventually the kinetic energy would be converted to heat in the wheel bearings, drivetrain bearings, and at the tire and road surface to bring the vehicle to a complete stop. The brake system provides the means of converting kinetic energy through stationary brake shoes or pads, which press against a rotating surface, generating friction and heat.
The amount of friction produced is proportional to the pressure between the two objects, the composition of the surface material, and surface condition. The greater the pressure applied to the objects, the more friction and heat is produced. The more heat produced by friction, the sooner the vehicle is brought to a stop, which results in stopping control.
The most widely used brake systems are the foot-operated main brake and manual-type parking brake. The main brake actuates the brake assemblies at each wheel simultaneously using hydraulic pressure. Fluid pressure created at the master cylinder is transmitted to each of the wheel cylinders through brake tubing. The wheel cylinders force the shoes and pads into contact with a drum or rotor turning with the wheels, generating friction and converting kinetic energy to heat energy. A large amount of heat is created, resulting in short-distance stopping and vehicle control. The converted heat is absorbed primarily by the brake rotors/drums and dissipated to the surrounding air.
Brake drums and rotors are forced to absorb a significant amount of heat during braking. Brake fade describes a condition in which more heat is generated than the drums and rotors are capable of dissipating into the surrounding air. For example, during a hard stop the temperature of drums or rotors may increase more than several hundred degrees farenheit in just seconds. It may take 30 seconds to cool these components to the temperature prior to braking. During repeated hard stops, the brakes may overheat, leading to a loss of brake effectiveness or even brake failure.
There are primarily three types of brake fading caused by heat:
Mechanical fade (drum brakes)
Lining fade (drum and disc brakes)
Hydraulic fade (drum and disc brakes)
Mechanical fade occurs when the brake drum overheats and expands away from the brake lining, resulting in increased brake pedal travel without an increase in brake force. Rapidly pumping the pedal will help to keep linings in contact with the drum.
Lining fade affects both drum and disc brakes and occurs when the friction material overheats and its coefficient of friction is reduced. This is called “thermal saturation.” When the lining reaches thermal saturation, both friction and the brake assembly’s ability to convert added heat are reduced. Hydraulic fade affects both drum and disc brakes and occurs when excessive heat from braking brings the brake fluid to its boiling point. At the boiling point, the fluid near the heat source begins to vaporize (change to a gaseous state). Under pressure, the vapors compress rather than transferring pressure, so overheated brake fluid will not transmit brake pedal pressure to brake calipers/cylinders. Brake fade is the primary reason for weight limits for towing, and for trailer brake requirements for vehicle towing loads that exceed a given trailer weight. The added kinetic energy resulting from increased vehicle mass requires added heat conversion capacity when the brakes are applied.
Disc Brakes assembly Pic: Disc, rotor, caliper, and disc pads are the major components (floating caliper shown).
· A cast-iron disc (disc rotor) that rotates with the wheel · A caliper assembly attached to the steering knuckle · Friction materials (disc pads) that are mounted in the caliper · assembly
Hydraulic pressure applied to the caliper piston forces the pad to contact the disc. Braking force is generated by friction between the stationary disc pads and the moving rotor. Disc brakes are less susceptible to pull than drum brakes because they don’t use a wedging action to increase brake power. The friction surface is constantly exposed to the air, ensuring good heat dissipation and minimizing brake fade. It also allows for self-cleaning as dust and water are thrown off, reducing friction differences. Unlike drum brakes, disc brakes have limited servo action, making it necessary to apply greater hydraulic pressure to obtain greater braking force. This is accomplished by increasing the size of the caliper piston. The simple design facilitates easy maintenance and pad replacement.
Different brake systems require different kinds of friction material.
Several considerations are weighed in development of brake pads: the coefficient of friction must remain constant over a wide range of temperatures; the brake pads must not wear out rapidly nor should they wear the disc rotors; the pads should withstand the highest temperature without fading, and they should be able to do all this without any noise. Therefore, the material should maximize the good points and minimize the negative points. Materials that make up the brake pad include friction modifiers, powdered metal, binders, fillers, and curing agents. Friction modifiers such as graphite and cashew nut shells alter the friction coefficient. Powdered metals such as lead, zinc, brass, aluminum, and other metals increase a material’s resistance to heat fade.
The Electronic Parking Brake (EPB) has an electric actuator that winds and unwinds the parking brake cable, applying and releasing the rear wheel-mounted parking brakes. In Auto mode, the brake applies and releases automatically as the vehicle is shifted in and out of Park. The driver can also apply and release the brake using the manual switch. The EPB applies automatically under certain conditions, including: - After 3 minutes of Brake Hold mode - During Brake Hold, if the: - Driver’s door is opened - Driver’s seat belt is unbuckled - Trunk lid is opened - Engine hood is opened The parking brake actuator includes: - Motor to wind and unwind cable - Cable tension sensor - Emergency release cable (manually unwind cable in case of system failure) If the system malfunctions, the EPB ECU turns on the brake warning light, displays a warning message on the multi-information display, and stores a DTC
Other systems take advantage of basic ABS functions to control additional vehicle operating conditions. 1. Traction Control (TRAC) helps prevent drive wheel spin during acceleration. a. ABS combined with reduced engine torque output 2. Electronic Brake Force Distribution (EBD) modifies braking force to compensate for changes in vehicle load. 3. Brake Assist provides extra brake fluid pressure during “panic stops.” 4. Vehicle Stability Control (VSC) helps prevent skidding or spinning while cornering. a. ABS, engine torque output, electronically controlled suspension control
Drive More Efficiently: • Aggressive driving (speeding and rapid acceleration and braking) can lower your gas mileage by as much as 33% at highway speeds and 5% around town. • Observe the speed limit—each 5 MPH you drive over 60 MPH can reduce your fuel economy by 7-8%. • Avoid idling—idling gets 0 miles per gallon! • Using cruise control on the highway helps you maintain a constant speed and, in most cases, will save gas.
Other Solutions: • Avoid carrying unneeded items. An extra 100 lbs. can decrease fuel economy by 1- 2%. • A roof rack or carrier provides additional cargo space and may allow you to meet your needs with a smaller car. However, a loaded roof rack can decrease your fuel economy by 5%. Reduce aerodynamic drag and improve your fuel economy by placing items inside the trunk whenever possible. For more tips and more information about gasoline pricing, visit www.fueleconomy.gov. • Aggressive driving (speeding and rapid acceleration and braking) can lower your gas mileage by as much as 33% at highway speeds and 5% around town. • Observe the speed limit—each 5 MPH you drive over 60 MPH can reduce your fuel economy by 7-8%. • Avoid idling—idling gets 0 miles per gallon! • Using cruise control on the highway helps
Keep Your Car in Shape: • Fixing a car that is noticeably out of tune can improve gas mileage by about 4%. • Keeping tires inflated to the recommended pressure and using the recommended grade of motor oil can improve fuel economy by up to 5%. The manufacturer’s recommended tire pressure can be found on the tire information placard and/or vehicle certification label located on the vehicle door edge, doorpost, glove-box door, or inside the trunk lid. • Keep your tires aligned and balanced. • Replacing a clogged air filter can improve gas mileage on older cars with carbureted engines.
Plan and Combine Trips: • A warmed-up engine is more fuel-efficient than a cold one. Many short trips taken from a cold start can use twice as much fuel as one multipurpose trip covering the same distance.
Note: Letting your car idle to warm-up doesn’t help your fuel economy; it actually uses more fuel and creates more pollution.
Size Designation: The tire designation determines the size, load capacity, radial construction and speed rating. The size designation contains information that allows you to determine if a vehicle's tires are equivalent to Lexus specifications.
DOT Label: The DOT certification label is a series of numbers and letters located on the tire's inner sidewall. It indicates a tire's compliance and certification with the Department of Transportation safety standards. This label designates the manufacturer, size, manufacturer code and production date of a tire.
All- Season Designation: This tire feature includes a tread compound that gives better traction in mud and/or snow. An all season designated tire must meet specified RMA (Rubber Manufacturers Association) criteria. All season tires have the following designations on the sidewall M+S, M&S, or M/S.
UTQGS: The uniform Tire Quality Grading System (UTQGS) is a tire based information system designed to help consumers make comparisons among tires. Under the UTQGS, tires are graded by the manufacturers in treadwear, traction and temperature resistance. The UTQGS is not a safety rating it simply gives buyers additional information to combine with other considerations, such as price, brand loyalty and dealer recommendations. The traction grades from highest to lowest "AA", "A" "B" "C". The "C" grade corresponds to the minimum performance required by federal safety standard. Grades "B" and "A" represent higher performance levels than the minimum required by law.
Load & Inflation limits: Tires need proper inflation pressure to operate effectively and perform as intended. The load and inflation limits on the tire sidewall is only the maximum recommended tire inflation pressure. The owners manual and the vehicle door jamb will have the proper tire inflation pressure.
1. "225": The numbers preceding the slash indicate the distance, in millimeters, across the widest point of the tire - called section width 225mm. When mounted on a wheel of specified width. 2. "55": This two-digit number is the aspect ratio, or profile, of the sidewall height is 55 percent of the tire's width. The lower the number, the shorter the sidewall. 3. "R": This letter indicates a radial tire construction; All Lexus vehicles are designed to operate with radial tires and replacement tires should be of radial ply design. Never mix tires of different construction types. Other constructions are "Z" for speed tires and "B" for belted. 4. "16": This number indicates the diameter of the wheel on which the tire should be mounted, generally in inches. 5. "94V": The 94 determines the load capacity per tire. In this case, the load index 94 and is equivalent to 1477 pounds per tire; 5908 pounds with four tires in total. The V identifies the speed rating, and on this vehicle the V identifies the speed rating of 149mph.
1.Tread: The portion of a tire that comes into contact with the road. Tread is distinguished by its design and rubber compound. 2.Carcass: The body of the tire located beneath the tread and sidewalls; also called casing. 3. Belts: A rubber- coated layer of cords that is located between the body plies and the tread rubber. Cords may be made from steel, fiberglass, rayon, nylon, polyester or other fabrics. 4. Bead wires: A round hoop of steel wires that is shaped to fit the rim around which the tires body piles are wrapped and which serves to hold the tire into the rim. 5. Sidewall: The portion of a tire between the tread and the bead.
Advantages of Correct Tire Inflation: Maintaining correct tire inflation pressure maximizes tires performance and fuel economy. Correct tire inflation pressure allows drivers to experience tire comfort, durability and performance designed to match the needs to their vehicles.
Disadvantages of Underinflation: An underinflated tire cannot maintain its shape and becomes flatter than intended while in contact with the road. If a vehicle's tires are underinflated by only 6 psi it could weaken the tire's internal structure and eventually lead to tire failure. Lower inflation pressures will allow more deflection as the tire rolls. This increases rolling resistance (causing a reduction in fuel economy of up to 5%) and reduces the tire's tread life by as much as 25% while increasing the probability of irregular treadwear. Drivers would also find a noteworthy loss of steering and cornering precision. While 6 psi doesn't seem low, it represents 20% of a passenger car tire's recommended pressure.
Disadvantages of Overinflation: An overinflated tire is stiff and the size of its footprint in contact with the road is reduced. If a vehicles tires are overinflated by 6psi, they could be damaged easier when encountering potholes or road debris. Furthermore, higher inflation pressures cause irregular tire tread wear and cause the vehicle to ride harsher transmit more noise to its interior.
Underinflation: Tire underinflation wear is described as excessive tread wear at both the inside and outside edges of the tire. With too low an inflation pressure the tread surface becomes concave and a greater load is placed on the edges of the tread than on the center. Some shoulder/ edge wear is typical on the front of FWD cars as a result of the forces created when turning and weight distribution on these vehicles. Proper tire rotation will generally minimize this wear.
Overinflation: Tire overinflation is tread wear at the center of the tire only. The high inflation pressure results in a convex tread surface in which the center of the tires tread takes on the greatest load. The rear tires of trucks and other rigid axle vehicles exhibit similar tread wear. A regular tire rotation minimizes this effect.
Causes: 1. High inflation pressure 2. Lack of regular tire rotation
Shoulder Wear: Individual shoulder wear describes excessive tread loss from one shoulder of a tire. This wear can occur at one or both tires on an axle pair. Wear at both outside shoulders of the front tires is a characteristic of excessive toe-in with radial tires or excessive high speed cornering. Wear at both inside shoulders of the front tires is a characteristic of excessive toe-out or insufficient toe.
Causes: 1. Toe error 2. High speed cornering
Feathered Wear: Tire feathered wear is best defined as a saw tooth pattern across the tire's tread surface. Feathering is generally caused by toe errors as the tire is forced to slip sideways as the vehicle moves forward. This wear pattern was more prevalent with bias tire designs. Excessive toe-in results in tread that is laid outward from the center of the vehicle. Individual tires showing a feathered edge may indicate a turning angle problem.
Causes: 1. toe error (bias tires) 2. turning angle errors
Edge wear: When Edge wear or shoulder wear retains a sharp edge where the tread meets the sidewall is a characteristic of camber error. Edge wear error occurs when one side of the tire actually turns faster than the other; resulting in tread slippage and rapid wear. Tread wear at the inside edge alone indicates excessive negative camber and tread wear at the outside edge alone indicates excessive positive camber. Vehicles with high positive caster could experience this type of wear at both tread edges from primarily urban driving.
Causes: 1. Camber error 2. High caster/ urban driving Lack of regular tire rotation
Cupping wear: Cupping wear describes spotty or rough wear caused by tread slippage at regular intervals. Anything that causes the tire's tread to wobble or move as it contacts the road surface may cause cupping.
Causes: 1. Wheeler balance and run out 2. Worn or loose suspension components Worn or loose steering components brake components tire flat spot or internal problem
Heel & Toe Wear: Heel and toe wear describes partial wear of individual tread blocks on the tire, they appear as sawtooth wear in the direction of the tire rotation. The tread blocks slip momentarily as the tread leaves the pavement. As the leading edge of the tread block leaves the pavement the trailing edge or heel cannot resist the force applied to it and slippage results. This pattern of tire wear is common on non-drive wheels and can often be corrected by more frequent rotation.
Causes: 1. Toe error soft tread compounds 2. Tread block squirm (lack of rigidity, all season tires most common) 3. Lack of tire rotation
Diagonal wear: A tires diagonal wear describes a condition which cupping appears diagonally across the tread surface. When operating at high slip angles the entire tread surface cannot resist the twisting forces applied to it and slippage occurs much like heel and toe wear. In fact, heel and toe wear may degenerate into diagonal wear.
The Tire Pressure Monitoring System alerts driver if a tire pressure falls below threshold. Thresholds are set by the Lexus technician when system is initialized during PDS, so it is essential that the technician be able to perform procedure correctly.
The National Highway Traffic Safety Administration (NHTSA) requires automobile manufacturers to install a system that can detect when one or more of the vehicle’s tires are 25% or more below recommended inflation pressure. Phase-in of this Federal regulation began in 2005.
As of 2008 model year, the regulation applies to all new 4-wheel vehicles weighing 10,000 pounds or less. Many of the TPMS operating characteristics are established in this regulation, including its designation as "Tire Pressure Monitoring System."
What is my tire size? Knowing your tire size can help save time and make an informed tire purchase. The tires sidewall contains information that allows you to determine if a vehicles tires are equivalent to Lexus factory specifications. Your vehicles manufacturer recommended tire is found in the door jamb on any Lexus vehicle. The following information is available on the sidewall of a passenger car tire:
a) size designation and service description b) load and inflation limits c) DOT certification and production date d) all season designation
What should I look for in a tire? Drivers should look for a tire which best suits your driving requirements. Tires are manufactured for almost every requirement; wet or dry traction, high mileage, high speed control, steering response, ride comfort etc. Our valued Lexus service advisor professionals will be able to counsel you of product features and benefits.
How can I tell when it is time to replace my old tires? Most automobile tires have a built-in tread wear indicator in the tread area of the tire. This wear indicator will show when there are 2/32' remaining on the tread. Depending on your driving habits or conditions you should replace the tire no later than when the wear indicator is visible.
How much should I pay for tires? Costs for tires depends on many factors. In some cases, consumers find very low priced tires, however, these tires are built using old technology and they do not carry the same warranties as other available products. Furthermore, the ride and comfort of the vehicle will suffer when very low priced tires don't meet Lexus factory specifications are of choice. We offer tire products in economy, mid-range and premium categories. It is always recommended you seek advise of the service advisor.
My brother-in-law says he can mount my tires so why should I visit Lexus? Unless your brother-in-law is a Lexus certified or ASE trained installer with access to the proper equipment it is not advisable to have him mount your tires. Improperly mounted tires can cause wear problems and shorten the life of your tires and put additional stress on power train and engine parts. More importantly, a tire and wheel assembly not mounted properly could come apart with explosive force causing injury.
How important is a tire's treadwear rating? When choosing a new set of tires, the treadwear rating offers no guarantee of the mileage a customer will get. Weather, driving habits, road conditions, alignment and tire maintenance all affect tread life. The treadwear rating merely lets a customer compare the potential life of different tires. Also, these ratings may be interpreted differently by different tire manufacturers. Refer to the appropriate Warranty and Services Guide for specific tire manufacturer limited warranty.
Depending on model, hybrid vehicles may have up to five driver-selectable driving modes: - Normal - PWR – Provides more responsive throttle for stronger accelerator response - ECO - EV - Snow Normal is the default mode as delivered from the factory. Other available mode(s) may be selected by pressing the appropriate switch. When the ignition is cycled, the modes typically default as follows: - PWR – OFF (normal mode) - ECO – whatever position was formerly selected - EV – OFF (normal mode) - Snow – OFF (normal mode)
When ECO mode is selected, the hybrid control system balances driving performance, air conditioning performance, and fuel economy. The ECO mode will provide better fuel economy if the vehicle is driven in the same manner as in normal mode. The driver may notice a less responsive throttle (more pressure required for acceleration). The hybrid control system increases the speed of the battery cooling fan and optimizes air conditioning performance by: - Reducing blower speed in AUTO mode - Reducing compressor speed - Reducing ventilation loss by switching air inlet to REC when ambient temperature is above a specified temperature - Increasing engine OFF time by reducing the engine coolant temperature threshold for starting the engine during heating ECO mode is cancelled when DEF is selected, but resumes when DEF is turned OFF. Note: Hybrid ECO mode should not be confused with the operation of the ECO indicator lamp on some non-hybrid models. The ECO indicator lamp simply provides a visual clue to the customer that they are driving the vehicle in an economical manner.
In EV mode, the vehicle is driven using only MG2 (and MGR, if equipped) to reduce noise and limit exhaust emissions. This mode does not improve fuel economy, and in fact frequent use of EV mode may reduce fuel economy. The driving range in this mode will vary by driving condition and the HV battery state of charge (SOC). Usually it will be between a few hundred yards to less than a mile. If the EV mode is selected and any of the operating parameters are not met, a message will be displayed on the multi-information display to inform the driver that the EV mode cannot be entered. If conditions change during operation in EV mode, the mode will automatically be cancelled. Typical cancellation parameters include: - SOC falls below 50% (4 bars indicated) - Vehicle speed goes above 25 mph - The accelerator pedal is depressed too far - HV battery becomes too warm
The Generation 6 Remote Touch navigation controller includes these functions: - MENU displays the start screen. - ZOOM changes the map scale and scrolls the screen. - MAP/VOICE displays present location and outputs voice guidance. - CONTROLLER moves the pointer on the screen. - ENTER selects the icon that has been highlighted by the pointer. - DISP displays the screen effects screen.
Up to 7 keys can be programmed to the smart access system with push-button start. The standard key is used for HS, GS, IS, LS and 2010 RX 350/450h models. An ultra-thin electronic Card Key is optional on LS 460: - Still has mechanical key built-in - World’s thinnest - Built-in transponder in case key battery fails (battery life 1to 1.5 years)
Bluetooth wireless technology enables multiple cell phones to interact with vehicle through a radio link with range of 10 meters. Bluetooth allows customers to use their cell phone hands-free in the vehicle. The antenna is located in the multi-information display. Up to four different phones can be used (“paired”) per vehicle. Each phone must be: - Compatible with the Lexus Bluetooth system - Paired (linked) to the specific vehicle (see Lexus.com for pairing procedure) On vehicles equipped with the Lexus Navigation System, additional hands-free functions are available — such as 1-touch dial to navigation system points of interest.
Current list of compatible phones available at Lexus.com. Site also provides FAQs for latest issues. Not all Bluetooth-capable cell phones will offer complete functionality within a Bluetooth Lexus vehicle. Even tested compatible phone performance will vary based on phone software version, coverage, and wireless carrier.
Vehicle-to-vehicle distance control mode is default mode. Driver sets both desired speed and desired vehicle-to-vehicle range (short, medium, long). There are four general states of system operation: constant speed control, deceleration control, follow-up control, and acceleration. For constant speed control (no vehicle ahead), the Driving Support ECU works with the ECM (controlling ETCS-i) to achieve and maintain set speed.
For deceleration control (vehicle ahead), based on input from forward-reading laser or radar sensor signal, Driving Support ECU first signals ECM to close the throttle. If additional deceleration is needed, Driving Support ECU signals Skid Control ECU to apply brakes. Stop lights are illuminated to warn following drivers. If system determines additional braking is needed to slow Lexus vehicle to speed of vehicle ahead, buzzer and multi-information display message alert driver to apply brakes.
For follow-up control, based on the driver’s selected vehicle-to-vehicle range and forward-reading laser or radar sensor signal, system controls throttle and brakes to maintain desired distance between Lexus vehicle and vehicle ahead. To avoid excessive use of brakes (such as when driving downhill), the Driving Support ECU can signal the ECT ECU to shift transmission to lower gear range.
The Lane-keep Assist (LKA) system uses a lane-recognition camera sensor to detect lane markers. If the system detects the vehicle is about to move out of its lane, it uses the warning buzzer, multi-information display, and steering assistance to warn the driver. Lake-keep Assist has two functions: Lane Departure Warning (LDW) When the possibility of lane departure is detected, this function warns the driver and applies a small amount of steering torque to alert the driver. The driver is also warned by a buzzer and the multi-information display. This function operates whether or not Dynamic Radar Cruise Control is engaged. If the turn signal is ON, there is no warning or correction. Lane-keep assist (LKA) When Dynamic Radar Cruise Control is engaged, and other vehicle operating conditions are met, this function can apply small amounts of steering torque to keep the vehicle within the lane.
The Lane Departure Warning function can operate above approximately 30 mph, even if the Dynamic Radar Cruise Control is not engaged. Lane-keep Assist, however, operates only above approximately 45 mph when the Dynamic Radar Cruise Control is in the vehicle-to-vehicle distance mode. LKA will not operate under the following conditions: - The road has no lane markers. - There is a lane marker on only one side of the road. LKA may not be able to accurately detect lane markers under a number of conditions, including: - Changes in ambient lighting or weather conditions - Lane markers that are in poor repair or are not white - In intersections - Obstruction of camera sensor (by dirt or reflections)
The Lane-keep Assist System uses the following components: Driving Support ECU – Receives input from several sensors and ECUs and controls LKA operation LKA Main Switch – Turns the system ON and OFF Lane Recognition Camera Sensor - Obtains an image of the road and communicates lane width, road curvature, yaw angle and the amount of vehicle offset from the center of the lane to the Driving Support ECU Multi-Information Display – Displays system operating conditions Turn Signal Switch – Outputs turn signal operation to the Driving Support ECU
Navigation and other system functions can be controlled through four methods, depending on model: - Physical switches installed in the instrument panel surrounding the display screen. - Display switches illuminated on the touch screen. Active switches are shown in color and illuminated on the screen. When a switch is transparent (clear or “grayed out”), it is inactive and not available for selection. - Remote Touch assembly installed on center console. Remote Touch is similar to the mouse on a computer. It allows the driver to navigate through menus without reaching out to touch the display screen. - Voice recognition of spoken commands. A limited number of navigation commands are available through voice recognition.
NavTraffic overlays traffic information on the navigation road map. Function is part of optional SDAR (Satellite Digital Audio Receiver) system. Shows traffic conditions between current location and destination. - Highways supported by the system are color-coded to indicate directional traffic flow speed. - Accidents, road construction, or other incidents are shown with icon at location of incident. - Information related to incident available: precise location, lanes affected, and predicted duration. NavTraffic currently serves 44 major metropolitan markets. Current list of supported markets available at www.xmradio.com.
Compression: When a refrigerant is compressed temperature increases. Expansion: When pressure is reduced, temperature decreases.
Temperature isn’t the only factor that affects vaporization and condensation. Pressure changes the temperature at which substances move between liquid and gas. Under pressure, it’s much harder for molecules to vibrate apart, so they condense into a liquid at a much higher temperature. In one step of the refrigeration cycle, the A/C system compresses the refrigerant until it becomes a liquid. In this step, condensation happens at a much higher temperature than it would if the refrigerant wasn’t compressed.
Once the refrigerant is compressed into a liquid, it’s allowed to expand into a low pressure space within the evaporator. When this happens, an interesting and useful thing occurs. When the pressure is released, the molecules expand and quickly cool down to their normal boiling point. The normal boiling point for most refrigerants is about -20ºF. The A/C system uses this rapid drop in temperature to cool the air passing through the evaporator.
Automotive A/C is achieved by the circulation of a refrigerant in a closed system. In this system, refrigerant evaporates to a gas and then condenses back again to a liquid in a continuous cycle. The completion of one cycle consists of:
The primary components in an automotive A/C system that allow the cooling process to occur are:
• Compressor – creates the pressure that heats the refrigerant gas and drives the refrigeration cycle. (Process: Compression)
• Condenser – heat exchanger that allows the pressurized refrigerant to turn into a liquid. Though liquid, the refrigerant is still hot. (Process: Condensation)
• Expansion Valve – creates the restriction that keeps refrigerant pressurized on the high pressure side. A small opening allows refrigerant to escape into the low-pressure side of the system. As it does, it expands, becoming a cool mist. (Process: Expansion)
• Evaporator – heat exchanger that allows heat from the air to convert the refrigerant droplets into gas. This absorbs heat from the air, making it colder. (Process: Vaporization)
• Receiver-Drier – acts as a storage tank and filter. It also contains a desiccant that absorbs and traps moisture that can cause ice blockages and corrode components. In earlier vehicles, the receiver-drier is a separate component. In Lexus vehicles, it is integrated with the condenser.
What A/C problems do you encounter most often?
Answer: Based on warranty data and technical assistance calls, compressor and compressor clutch problems make up the vast majority of air conditioning issues.
• Radar-based PCS relies strictly on the same forward-looking radar data used by dynamic radar cruise control. The Driving Support ECU monitors radar data for conditions during which collision may be unavoidable.
• Example: solid object in vehicle’s path together with vehicle speed that, given object’s distance, may not allow successful evasive action If the ECU determines collision may be about to occur, it can take one or more actions (depending on other vehicle conditions)
• Signals Skid Control ECU to be ready with brake assist, in case of sudden braking.
• Signals Air Suspension Control ECU to increase shock absorber damping, maximizing vehicle dynamic capabilities.
• Signals Seat Belt Control ECU to operate front seat belt motors, minimizing slack in front seat belts. If no collision occurs and pre-collision conditions disappear, all systems return to normal operation.
*Note: Some systems have a PCS OFF switch that allows the driver to turn off all PCS functions. Other systems have a Pre-Collision Brake OFF switch that disables only the braking portion of PCS.
• In daylight, the object recognition camera captures data from the reflection of natural infrared rays off nearby objects. When the headlights are on, a filter in each headlight assembly creates supplemental
• infrared light, allowing the object recognition camera to “see” at night.
• The object recognition camera assembly includes two cameras placed side-by-side.
• The Object Recognition ECU processes the left and right image signals to detect a three-dimensional form and calculate the distance to the object.
• Object at entrance to corner (guardrail, street light, sign, etc.) • Oncoming traffic in corner • Oncoming traffic at intersection • Narrow iron bridge (or similar structure) • Metal object, steel plate, or bump in road • Front radar sensor cannot reliably detect all objects, for example: • Objects that cannot be detected: plastic items such as safety cones. • Objects that cannot be detected reliably: people, bicycles, motorcycles, trees, animals, snow fence, and similar objects. • Front radar sensor may not detect objects when: • Lens is dirty, or blocked by items on front of vehicle. • Weather conditions (such as snow) interfere with radar operation. • Object recognition camera may not detect objects when: • Weather conditions (such as snow) cause low visibility • Camera becomes extremely hot • Light shines directly into camera • Driver monitor camera may not detect face of driver when: • An object is between camera and driver's face • A portion of driver's face is hidden (hair, glasses, hands, hat, mask, etc.) • Camera lens is dirty • Horizontal shadows or sunlight hit driver or camera • Driver is not in range of camera
• Do not rely entirely on the parking assist. When backing up, drive the vehicle as carefully as you would drive one that is not equipped with the parking assist.
• Back up slowly, using the brake pedal to adjust the speed.
• If the vehicle appears about to come into contact with an adjacent vehicle or pedestrian, press the brake pedal to bring the vehicle to a stop. Then, cancel the parking assist by pressing the stop switch on the screen.
• When the system is operating, the steering wheel will turn automatically. Maintain a proper driving posture without allowing a necktie, jewelry, or your arms to get caught, or long finger nails to come in contact with the steering wheel. Do not allow children to come close to the steering wheel.
• Operate the system only in a parking area containing parking spaces partitioned with white lines.
• Never attempt to back up the vehicle only by observing the screen. If you do so, you could unexpectedly crash the vehicle or cause an accident because the image on the screen could differ from the actual situation. While backing up, also make sure to use the inside and outside rear view mirrors in order to directly verify the safety of the rear and surrounding areas.
• Do not expose the television camera to a strong impact or force, as it will alter the orientation of the camera and cause improper operation. Because the adjustment of the orientation of the camera requires special tools, make sure to have it performed at a dealer.
1) Stop the vehicle parallel to the road, approximately 3 feet away from parked vehicles. This allows the ultrasonic instruments to identify the distance between the driven vehicle and the parked vehicle to calculate the target parking space.
2) Pull foreword to a position where you can see the rear edge of the leading parked vehicle beside you, with the steering wheel straight. The move foreward about 16 feet and stop.
3) Shift to R and press the parallel parking assist mode switch on the multi display.
4) Use the arrows to align the green frame with the target parking position, and then press the “OK” switch.
5) Rest your hands o the steering wheel without applying pressure. Check your surroundings and behind the vehicle for safety, then slowly back up, using the brake pedal to control the vehicle’s speed.
6) When the vehicles is mostly within the target parking position, the parking assist mode will finish.
1) Stop the vehicle perpendicular to the parking space, as close as possible to the vehicle parked next to the target space. This allows the ultrasonic sensors to detect the distance between the driven vehicle and the parked vehicle so the parking space can be calculated.
2) Pull foreword to a position where you can see the center of the target parking space, and start turning the steering wheel.
3) Move to a position where the vehicle will be able to back into the parking space, then stop the vehicle with the steering wheel straight.
4) Shift to R and press the perpendicular parking assist mode switch on the multi display.
5) Use the arrows to align the green frame with the target parking position, and then press “OK” switch.
6) Rest your hands on the steering wheel without applying pressure. Check your surroundings and behind the vehicle for safety, then slowly back up, using the brake pedal to control the vehicle’s speed.
The driver controls the direction of the vehicle through the steering system. The steering system should provide:
• Excellent maneuverability • Proper steering effort • Smooth recovery from a turn • Minimal transmission of road shock
Steering Gears: The rotary motion of the steering wheel is transferred into lateral motion by the steering gear. The steering gear also provides a gear reduction, which reduces the effort required to turn the wheels.
This design is compact, lightweight, and more responsive than other steering gear designs. A pinion gear is splined to the steering column shaft. The pinion gear is meshed to the rack gear. A rack guide forces the pinion gear and rack gear tightly together. Turning the steering wheel rotates the steering shaft and the pinion gear, causing the rack gear to move left or right. This movement transfers directly through the steering linkage to the wheels. The spacing of the teeth on the rack gear is wider toward the center and closer together near the ends of the rack gear. This varies the effort needed to turn the wheels. The result is less steering effort at the extremes of rack travel.
Steering Linkage: The lateral motion created by the steering gear is transferred to the wheels by the steering linkage.
The rack and pinion steering linkage uses very few components. This results in a more responsive feel with less parts that can wear out. It consists of inner tie rods and outer tie rod ends. The inner tie rods are ball and socket type joint. They are threaded onto the steering gear at end and to an outer tie rod end at the other. The inner tie rods are located under the rack bellows and socket joint, similar to a ball joint, on the other, This provides an adjustable connection to the steering knuckle.
Force is the capacity to do work or cause change. Hydraulic force is measured in pounds per square inch (PSI). 100 PSI applied to a one square inch piston results in 100 pounds of output force. Changing the piston size in a simple hydraulic system will multiply the force. If 100 PSI is applied to a two square inch piston, the outcome is 200 pounds of force.
Fluid, unlike gas, cannot be compressed and will remain constant, even under pressure. For a hydraulic system to contain pressure it must be closed. Without confined no pressure can exist. Pascal’s law states the pressure in a closed system is applied equally to all points within that system, no matter the volume of fluid. In a closed hydraulic system, a piston will move if a difference of pressure exists on its external surface. If equal pressure exists on the surface of the piston, it will not move.
Power assist steering systems are based on controlling the pressure, flow volume, and location of pressure differential.
Electric Power Steering (EPS) provides power assist even when the engine is stopped. It also improves fuel economy, because it is lightweight and the DC motor consumes energy only when power assist is required.
Because EPS does not depend on the engine for its power, steering feel is not affected when the hybrid vehicle is driven with the engine off.
EPS uses a DC motor mounted either within the steering rack or on the steering column. EPS requires a relatively high DC voltage:
• Some EPS systems have a dedicated EPS DC-DC converter that receives high voltage from the HV battery circuit and converts it to a relatively lower voltage for use by the EPS motor. • In other EPS systems, the power steering ECU steps up voltage from the auxiliary battery.
The Electronically Controlled Brakes (ECB) system uses a brake pedal stroke sensor that measures pressure from the driver’s foot on the brake pedal. Actual system pressures are controlled by the Skid Control ECU. Pressure is generated by the pump and applied through solenoid valves within the brake actuator.
Some ECB systems have an auxiliary power source that provides backup power for brake operation in case the system malfunctions. The power supply contains capacitor cells that store an electrical charge provided by the vehicle’s 12-volt battery. If voltage drops in the 12-volt system, the electrical charge stored in the capacitor cells provides auxiliary power to help keep the brake system operating smoothly.
Varying amounts of hydraulic brake pressure applied at individual wheels to help prevent loss of traction
• Helps prevent wheels locking up in heavy braking • Main purpose is to help maintain steering control
All Lexus vehicles have ABS.
• 4-channel ABS (most models) individually controls each road wheel. • 3-channel ABS (some SUVs) individually controls each front wheel, treats rear wheels as a single unit.
If ECU disables ABS due to a system fault, vehicle’s normal hydraulic braking system will continue to function without anti-lock capabilities.
In other ECB systems, a hydraulic brake booster is built into the master cylinder. It generates hydraulic pressure based on the amount of effort applied to the brake pedal by the driver.
During normal braking, the hydraulic pressure generated by the hydraulic brake booster does not directly actuate the wheel cylinders, but serves as a hydraulic pressure signal. The signal is used to regulate the hydraulic pressure of the brake actuator and the brake booster pump assembly. This regulated hydraulic pressure actuates the wheel cylinders.
The hydraulic brake booster has three failsafe modes:
• If the brake actuator stops working, the hydraulic booster supplies braking pressure to all brakes. • If accumulator pressure is not applied, the hydraulic booster supplies pressure to the front brakes only. • If the front brake system malfunctions, the hydraulic booster supplies pressure to the rear brakes only.
What are some common reasons why the "BRAKE" indicator light is illuminated?
1) The "Brake" indicator light will illuminate if the parking brake is not fully released. The driver may check if the parking brake is fully released. Sometimes the parking brake seems to be released, but it may need be held for a little while before it really releases. The customer can also repeat applying and releasing the parking brake, while parked, as they may have not released the parking brake completely.
2) The light will also be on if the brake fluid is slightly lower than allowed. That is usually an indication that the brake pads are worn and need service soon.
3) The worst-case scenario is that the brake system is leaking fluid, which could lead to hydraulic failure resulting in no braking power. The driver would feel the brake pedal become spongy, and braking power required would steadily decrease or become more difficult. The driver should not drive the vehicle in this situation. The vehicle should be towed and repaired. Additional diagnostics that may be performed by the dealer include: parking brake adjustment, parking brake warning switch, parking brake warning switch wiring harness and connected components, brake fluid-level warning switch, brake fluid-level warning switch wiring harness and connected components.
Oil filter replacement on some vehicles requires that cutouts on the case and oil filter cap be matched up.
• IS 250/350, IS 250/350 C 2WD • GS 350 2WD
Oil filter replacement on some vehicles requires a filter drain plug.
• ES 350 • IS 250 AWD • GS 350 AWD • GS 460 • LS 460/600h L • LX 570 • RX 350/400h/450h
Without an oil filter, oil will become saturated with contaminants causing internal parts to wear prematurely. Oil filters help your car run better longer by maintaining a clean, well-performing engine. Changing the oil filter in your vehicle regularly is an essential part of engine maintenance.
The term “telematics” means wireless 2-way communication with the vehicle for sending, receiving, and storing information. Each vehicle has a unique access number used by the call center. The system includes GPS, XM satellite radio, cellular technology, a call center, and vehicle components and provides:
• Safety and security services called Safety Connect™ • Premium convenience services called Lexus Enform™
Safety Connect provides emergency call services by transmitting data and audio to the vehicle through a cellular network. Services include: • Automatic Collision Notification (ACN) • Stolen Vehicle Location (SVL) • Emergency Assistance (SOS Button) • Enhanced Roadside Assistance
Safety Connect hardware will become standard equipment on all Lexus models (except SC). Safety Connect does not require a navigation system. At new vehicle purchase, customers receive a complimentary limited-time subscription to Safety Connect services. After the complimentary period expires, the subscription may be renewed at the customer’s expense.
Lexus Enform provides owners with premium convenience services by transmitting information to the vehicle through a cellular network and XM® satellite radio. This information is displayed on the navigation system’s multi display. A Lexus Enform subscription also includes Safety Connect service. Available services may be limited by geographic location, but include:
Lexus Enform hardware is included on vehicles with a navigation system (except SC). At new vehicle purchase, customers receive a complimentary limited-time subscription to Lexus Enform services. After the complimentary period expires, the subscription may be renewed at the customer’s expense.
Must have customer’s hand-held transmitter. 1. If this is first time for vehicle HomeLink® programming, erase factory default codes.
Press and hold the two outside buttons. Release both buttons when the LED begins to flash (in about 20 seconds). This process erases any programming on all three buttons. Only do this if you are sure it is first time buttons are being programmed in this vehicle.
2. Keeping indicator light in view, hold end of hand-held transmitter about 2–5 inches away from HomeLink®.
3. Using both hands, simultaneously press button on hand-held transmitter and HomeLink® button.
Do not release the buttons until next step is complete.
4. Hold down both buttons until HomeLink® indicator light flashes, first slowly and then rapidly. When indicator light flashes rapidly, both buttons may be released.
5. To program additional buttons, repeat steps 2–4.
Vehicle Dynamics Integrated Management (VDIM) 1. Separate systems were using the same sensors and actuators to control slightly different aspects of vehicle dynamic driveability. 2. VDIM integrates systems — enhancing vehicle’s ability to go, stop, turn. a. VDIM addresses vehicle stability well before the loss-of-control threshold approaches. b. Instead of waiting until wheels are about to slip, VDIM begins countermeasures beforehand. c. Overall smoother vehicle operation, expanded vehicle dynamic driveability threshold — more fun to drive
The optional advanced parking guidance system controls the steering to assist the driver with perpendicular and parallel parking. The multi display shows a rear view of the vehicle, and the system provides voice guidance. When the driver shifts into reverse position, the multi display switches to a screen where the driver can adjust the target parking position. The system calculates the target parking position using signals from ultrasonic sensors on both sides of the front bumper. Self-diagnosis for this system is accessed through the multi display panel (similar to navigation diagnosis).
Precautions for Advanced Parking Guidance System usage: - Do not rely entirely on the parking assist. When backing up, drive the vehicle as carefully as you would drive one that is not equipped with the parking assist. - Back up slowly, using the brake pedal to adjust the speed. - If the vehicle appears about to come into contact with an adjacent vehicle or pedestrian, press the brake pedal to bring the vehicle to a stop. Then, cancel the parking assist by pressing the stop switch on the screen. - When the system is operating in the parking assist mode, the steering wheel will turn automatically. Maintain a proper driving posture without allowing a necktie, jewelry, or your arms to get caught, or long finger nails to come in contact with the steering wheel. Do not allow children to come close to the steering wheel. - Operate the system only in a parking area containing parking frames partitioned with white lines. - Never attempt to back up the vehicle only by observing the screen. If you do so, you could unexpectedly crash the vehicle or cause an accident because the image on the screen could differ from the actual situation. While backing up, also make sure to use the inside and outside rear view mirrors in order to directly verify the safety of the rear and surrounding areas. - Do not expose the television camera to a strong impact or force, as it will alter the orientation of the camera and cause improper operation. Because the adjustment of the orientation of the camera requires special tools, make sure to have it performed at a dealer. - Operate the system only with the luggage compartment doors completely closed. - Do not operate the system on a slippery surface such as a frozen or snowy road, or when using tire chains. Doing so could unexpectedly cause the vehicle to crash or become involved in an accident.
What does Lexus recommend for the engine break-in period?
The engine of your new Lexus vehicle is made with industry-leading precision and quality. As a result, the break-in procedures listed in the Owner's Manual for a brand-new Lexus are optional. While following these procedures may help to optimize engine performance and engine longevity over the life of the engine, these potential benefits are marginal compared to the benefits that result from ensuring that recommended maintenance is performed as scheduled.
What is the factory recommendation to have the timing belt replaced?
Our timing belts have been very reliable. However, the timing belt is subjected to severe stress if the vehicle is operated under extensive idling or low speed driving for long distances, such as in heavy commercial use such as delivery, taxi or patrol car. If the timing belt breaks, the engine will stop running and will not restart until it is repaired. While it is possible that the original timing belt may last the life of the above engines, for peace-of-mind, the timing belt may be replaced every 90,000 miles. Also, if major engine work is performed, such as a valve job or engine rebuild, the timing belt should be replaced.
What should be done to a Lexus vehicle to prepare it for long-term storage?
Before storing car: Change engine oil; change engine coolant if due during time of expected length of storage; fill up fuel tank; wash vehicle using high-pressure water or steam to clean underneath. Rub the leather seat surfaces with an approved leather cleaner and allow to dry in a ventilated, shaded area. Check underneath the floor mats to ensure the carpet is dry. If there are any paint chips, have them repaired. (Customer should be aware that Lexus recommends operating the A/C compressor once a month to ensure proper lubrication. If the vehicle is stored for a long time, it could be detrimental to the compressor.) When storing car: Operate engine at normal operating temperature for 15 minutes prior to shutting off the engine. Disconnect negative battery cable. (If applicable, radio may lock up.) Leave parking brake off. Put vehicle up on blocks. If stored in a temperate, ventilated garage, windows can be left cracked slightly open. Cover vehicle. When bringing vehicle out of storage: Charge battery and reconnect negative battery cable. Check and add underhood fluid levels as needed. Check and inflate tires to correct pressures before taking vehicle off blocks. After starting engine, observe warning lights. If any remain illuminated, have issue addressed by Lexus dealer as appropriate. Check brake pedal for normal feel (height and firmness) before shifting transmission. Take vehicle to a Lexus dealer for general inspection.
Does the Owner's Manual state the minimum required maintenance for my Lexus?
Maintaining your Lexus vehicle according to the recommendations in the Warranty and Services Guide Scheduled Maintenance Log is required to ensure that your warranty coverage remains intact. Your Lexus dealer may recommend more frequent maintenance intervals or more maintenance services than those listed in the Warranty and Services Guide. These additional services are not required to maintain your warranty coverage. Please ask your dealer for an explanation of any recommended maintenance not included in the Scheduled Maintenance Log.
How do I clean the interior and exterior of my Lexus?
You don't need to take your vehicle to a car wash to keep it looking beautiful. By using the right products, you can clean the exterior, the wheels and even the leather interior. You'll find detailed instructions in the attached PDF.
Click here to download Maintenance and Care - Exterior, Interior and Wheel Care PDF
What's the best way to take care of my Lexus?
Regular maintenance can help keep your vehicle at its peak performance while averting more serious repairs down the line. When you purchase a Lexus, your dealer will give you several booklets that contain detailed maintenance instructions. For more maintenance information, read the attached PDF. You can also visit your specific model's "Service & Maintenance" page on lexus.com, where you can find your full maintenance guide.
*DETAIL YOUR LEXUS AT NORTH MIAMI STARTING AS LOW AS $109.00. CALL (786) 528 -3747 ASK ABOUT OUR VARIOUS DETAIL PACKAGES. OUR DETAIL PACKAGES RANGE FROM INTERIOR TO A FULL BLOWN DETAIL.*
What should be used to clean the carpet?
Lexus recommends the use of Scotchguard™-type products on polyester material to help repel fluids, which could help keep liquids from soaking in and drying between the polyester fibers. Scotchguard™-type treatments are applied to the surface and will wear off at some point. For more information on carpet care for your vehicle, please contact your nearest Lexus dealer.
What should be used to clean fingerprints on the navigation screen?
Use an eyeglass-cleaning cloth for cleaning fingerprints from the screen. Do not use any cleaner containing ammonia.
Is it possible to experience a different fuel-consumption rate than the EPA estimates?
Yes. There is no single test that can simulate all possible combinations of climate, driver behavior and car-care habits. The actual vehicle mileage depends on factors such as how, when and where the vehicle is driven. Beginning with the 2008 model year, the EPA applies different correction factors to all vehicles to determine the city and highway fuel economy estimates. By doing so, 2008 model year fuel economy estimates will be lower for most vehicles than they were before.
Which fuel grade should I use for my Lexus vehicle?
Lexus recommends Premium Unleaded Fuel for all 2008 and newer model year vehicles. For older models, please consult your Owner's Manual for recommended fuel requirements.
Where is the best place to quickly find the vehicle identification number (VIN) on my vehicle?
The VIN is printed on the certificate label located on the front driver's-side doorjamb. There is also a VIN plate located on the lower dashboard (closest to the windshield on the driver's side).
Can I use synthetic engine oil in my Lexus vehicle during its break-in period?
Synthetic oil can be used at the first scheduled oil change. Please note that the use of synthetic oil does not extend the recommended oil change intervals. Please refer to the Lexus Warranty and Services Guide for further information regarding the proper maintenance schedule for your specific vehicle. If synthetic oil is used after that time, it should be the same SAE (Society of Automotive Engineers) weight specification and meet or exceed the API (American Petroleum Institute) grade specifications listed in the Owner's Manual. Even if synthetic oil is used, we do not recommend longer oil change intervals. Once synthetic oil is used, it is best not to switch back to petroleum-based oil.
What are HID headlamps?
High-Intensity Discharge (HID) headlamps with dynamic auto leveling use an advanced "discharge" principle. Inside the headlamp bulb, mercury vaporizes under heat and discharges arcs, causing metal atoms enclosed in the light bulb to emit light. HID headlamps produce light that closely approximates a solar or "daytime" color. They also provide twice the light of halogen bulbs, yet consume 30 percent less power. For a full listing of Lexus products available with HID headlamps, please visit the Innovation section on Lexus.com.
When the system is set on Recirculation Mode, does "fresh air" still enter the vehicle?
The air conditioning system is designed to allow up to approximately 10% of the air coming from the air vents to be fresh air from the outside. The exact amount of fresh air entering the vehicle on recirculation mode will vary. If the A/C system is turned on in the AUTO mode, then the A/C ECU switches the air intake ducting between "fresh," "fresh and recirculation mix" or "recirculation" according to the required outlet air temperature that the ECU calculates. This calculation is based on the temperature that is dialed in with the control knob, the interior air temperature and the operating conditions.
What causes vapor/steam to emit from the air conditioner vents?
On humid days, water vapor in the air may condense and freeze inside the air conditioning evaporator. A minimal level of frost in the evaporator does not affect cooling airflow. If enough ice builds up in the evaporator, it will reduce or block cooling airflow. This would usually be on an extended drive rather than a short trip. If the evaporator freezes up, or if the A/C button is turned off, the ice will melt. The A/C can be turned back on after 10 or 15 minutes and should blow cold again. In order to minimize freezing of the evaporator, the A/C system can be run on Recirculation Mode and the temp can be set at a level of, say, 72 degrees, with the fan at a medium range. Also, a dealer may check the A/C system to ensure that the evaporator condensation drain is clear.
What type of power steering fluid is used in Lexus vehicles?
Dexron III transmission fluid is used in Lexus power-steering systems, except for electric power-steering systems.
Can an odometer be repaired?
The odometer is not designed to be repaired. If it is not working as designed, it needs to be replaced.
What size battery is used in Lexus remote keys?
The current model Lexus vehicles use CR1632 and CR1616 Panasonic batteries, which can be obtained through a Lexus dealer.
Click on the image above for the GS350 Technical Introduction
For 2013, the Lexus GS 350 has been re-designed and the GS 460 has been discontinued.
The 2GR-FSE engine carries over from the previous model with improvements to the intake and exhaust to improve power performance without compromising fuel economy or emissions performance.
This engine has revised front mounts to improve comfort and performance. The mounts are different for RWD and AWD applications.
Click on the image above for the GS350 Test Drive Module
The GS 350 has an Optitron combination meter with a 3.5-inch TFT multi-information display between the tachometer and the speedometer.
Meter ambient illumination changes (blue or red) depending upon which drive mode is selected (similar to CT 200h). Illumination can be personalized if the customer desires.
The GS 350 uses a drive mode select switch that allows the driver to change the performance characteristics of the vehicle. The basic functions are similar to the system controls found on the CT 200h.
The drive mode selector switch is turned to the left to enter the ECO mode, to the right to select the SPORT modes, or pressed in to return to NORMAL mode.
Vehicles without Adaptive Variable Suspension (AVS) have SPORT mode, while vehicles with AVS have SPORT S and SPORT S+ modes (turn the selector once to the right for SPORT S, twice for SPORT S+).
The combination meter ambient light will be blue or red depending on which drive mode is selected. In NORMAL and ECO modes the illumination will be blue, and in the SPORT modes the illumination will be red. The settings for the meter illumination can be personalized.
The Blind Spot Monitor System uses millimeter wave radar sensors to detect vehicles that the driver may not be able to see. This helps the driver confirm safety when changing lanes.
Click on the image above for the GS350 Test Drive Module