2012 Lexus LFA steer

45
Steering
■
■Steering wheel
The steering wheel features a flat-bottomed design that has 1.10 in. (28 mm) of the
lower half cut away. This reduces the steering wheel’s inertial moment and locates
the wheel’s rotational center and its center of gravity in almost the same place, almost
completely eliminating any imbalance within the steering wheel itself, reducing the
amount of steering fluctuations imparted by lateral and vertical forces. Ultimately
this provides the driver with a more natural and accurate steering feel. Furthermore,
the use of an aluminum alloy frame and hollow CFRP rim reduces the inertial force
generated by steering inputs.
H o l l o w C F R P
steering wheel rim
Center of rotation
Center of gravity
Turns lock-to-lock: 2.35
Aluminum alloy frame
Steering wheel center

46
■
■Steering rack and gearbox
The steering gearbox consists of a monoblock aluminum alloy rack and pinion unit
mounted to the front suspension member using four rigid mounts. This allows the
driver to feel as if they are solidly connected to the road. An overall steering ratio of
14.3:1 allows the driver to precisely follow their intended line through a corner.
S107-06The joint between the steering shaft and gearbox is set at a narrow angle (approx. 10˚)
for a highly efficient connection that allows even subtle steering inputs to be accurately
conveyed, keeping the LFA directly on the driver’s intended path no matter what the
situation, whether it be a winding road or an extremely fast straightaway. Joint angle: Approx. 10˚

47
Steering
■
■Suspension
The LFA is equipped with a double wishbone front suspension and multi-link rear
suspension.
The front suspension features two independent lower arms that shorten the offset of
the virtual kingpin axis from the wheel centerline along with a slightly negative kingpin
offset in order to ensure ample stability under braking. Furthermore, the low offset
between the kingpin axis and wheel centerline allows for excellent road compliance
and outstanding stability.
Ground contact patch kingpin offset
Wheel centerline
Kingpin offset
Virtual kingpin axis

Regarding suspension adjustments:
The LFA is equipped with adjustable coil spring perches in order to allow for
any fine tuning needed to keep the geometry optimized at all times. Each LFA is
shipped from the factory with the suspension adjusted to the optimal settings.

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Using the meter
When the control pad on the steering wheel is pressed to the right, the ring moves
with the display to the right of the screen in order to accommodate the menu.
The meter can be customized to display various functions.
■
■Using the menu
1 Press right on the control pad to
show the menu display.
2 Press up and down on the control
pad to select the menu item.
3 Press right on the control pad to go to
the next display. Follow the instruction
shown on the display.
4 When setting is complete, press and
hold left on the control pad to return
to the normal display.
Pressing left once on the control pad shows the previous display.

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Brake and Tires
Brake Calipers FrontOpposed 6-piston monoblock
Rear Opposed 4-piston monoblock
Brake Rotors CCM
(Carbon Ceramic Material)
Brake Rotor (diameter) Front
f390 mm x 34V
Rear f360 mm x 28V
Brake System ECB
(Electronically Controlled Brake)
Brake Fluid Type FMVSS No.116 DOT3
Brake Fluid Capacity RHD1.2L (1.3 qt., 1.1 lmp. qt)
LHD 1.1L (1.2 qt., 1.0 Imp. qt.)
Parking Brake EPB (Electric Parking Brake)
Wheel Size Front20 x 9.5J +45
Rear 20 x 11.5J +45
Tire Size Front265/35ZR20 (95Y)
Rear 305/30ZR20 (99Y)
Suspension Type FrontDouble Wishbone
Rear Multi-link
Steering Gear Type Rack and Pinion
Steering Gear Ratio 14.3
Lock to Lock 2.35
Power Steering Type EPS (Electric Power Steering)
Stability control VDIM (Vehicle Dynamics
Integrated Management)
Electrical System
Battery Size S75D31R
Voltage & Amp.hr. (5HR) 12V-56AH
Alternator Output 2,640 W
Starter Output 1.7 kW

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Index
AAccelerating 32
Accelerator pedal mechanism 32
Active rear wing (maintenance) 80
Active rear wing
(manual operation) 80
Active rear wing (operation) 28
Adding fuel 12
Adding gasoline 12
Adding petrol 12
Adjusting the steering wheel
position 23
Advice for long-term storage 92
Alcantara® care 85
Alcantara® cleaning 85
Alcantara® maintenance 85
Alignment 47
Aluminum center hat 53
Analog gauge 59
Approach angle 100
AUTO mode 58
AUTO mode
(control characteristics) 26
AUTO mode (selection) 27
Automated car-wash 79
Automatic 41
Automatic downshift control 40
BBack door 12
Backing up 11
Battery
(vehicle long-term storage) 93
Battery dark current 93
Battery terminal disconnection 99
Bedding-in new brake pads
or rotors 53
Blipping control 40
Bonnet 12
Bonnet stay 12
Boot 12
Brake caliper 52
Brake discs 53
Brake override system 50
Brake pad bedding 53
Brake pad bed-in 53
Brake pad replacement 53
Brake pedal 51
Brake rotors 53
Brake system 50
Braking 50
Break-over angle 100
Brightness 67
CCarbon fiber care 86
Carbon fiber cleaning 86
Cardan shaft 38
CCM (Carbon Ceramic
Material) discs 53
Ceramic brake discs 53
Ceramic brake rotors 53
CFRP (Carbon Fiber Reinforced
Plastics) maintenance 86
Changing gears 36

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Engine response 56
Engine speed control 40
Engine speed limiters 16, 17
Engine starting restrictions in
extremely low temperatures 17
“ENGINE START” switch 9
Engine switch 9
Engine type 16
EPB (Electric Parking Brake) 52
EPS (Electric Power Steering)
system 44
Exterior care 78
Exterior maintenance 78
FFlat bed transporting 100
Flat-bottomed steering wheel 45
Floating disc 53
Floating rotor 53
Floor mat usage 22
Floor-mounted brake pedal 51
Front brake caliper 52
Front brake rotor 53
Front counter gear 38
Front disc 53
Front rotor 53
Front suspension 47
Fuel 63
Fuel filler door 12
Fuel filler door manual unlock 95
Fuel gauge 63
Fuel level units selection 67
Fuel tank 63
Fuel tank cap 12
Fuel tank volume 12
Fuel type 12
Fuelling up 12
Fuse 93
GGas 63
Gas filler door 12
Gas filler door manual unlock 95
Gas level units selection 67
Gas tank 63
Gas tank cap 12
Gas tank volume 12
Gas type 12
Gauge 57
Gauge cluster 57
Gauges 57
Gear selection 36
Genuine leather maintenance 84
HHandbrake 9
Heel stopper 22, 51
Hood 12
Hood stand 12
IIdeal driving position 17
If the vehicle battery is discharged 94
Ignition switch 9

120
Speed Indicator 67
Speedometer 57, 67
SPORT mode 58
SPORT mode
(control characteristics) 26
SPORT mode (selection) 27
Starting off 11
Starting the engine 9, 1 0
Starting the engine by connecting
an external battery 98
Status 67
Steering 44
Steering adjustment 23
Steering column adjustment 9
Steering column shaft-mounted
EPS (Electric Power Steering)
system 44
Steering rack and gearbox 46
Steering system 44
Steering wheel adjustment 23
Steering wheel adjustment lever 9
Steering wheel adjustment
range 23, 45
Steering wheel position
adjustment 23
Steering wheel shape 45
Steering wheel telescoping range 23
Steering wheel tilt range 23
Stop and go traffic 37
Stopwatch 67 , 72
Suppressing dark current
(parasitic current) 93
Suspension adjustment 47
Suspension geometry 47
Synchronizer rings 39
Synchronizers 39
Synchros 39
TTachometer 59
Telescopic adjustment range 23
Telltale needle 71
Temperature display units
selection 67
TFT LCD panel 56
Throttle body valve opening
angle 33
Throttle response 33, 56
Throttle response adjustment 33
Throttle valve opening angle 33
Tilt and telescopic steering control
lever 9
Tilt range 23
Tilt sensor deactivation 102
Tires (vehicle long-term storage) 92
Tool bag 100
Topping up the oil level 69
Torque tube 38
TORSEN® LSD 39
Tow hook 100
Tow truck selection 100
Towing eyelet 100