brake Lexus ES350 2008 Service Manual

310
4-3. Do-it-yourself maintenance
ES350_U_(L/O_0708)
Power steering fluid■ Fluid level
The fluid level should be within the appropriate range.
Full (when cold)
Add fluid (when cold)
Full (when hot)
Add fluid (when hot)
Hot: Vehicle has been driven around 50 mph (80 km/h) for 20 min- utes, or slightly longer in frigid temperatures. (Fluid tempera-
ture, 140 °F - 175 °F [60 °C - 80 °C])
Cold: Engine has not been run for about 5 hours. (Room tempera- ture, 50 °F - 85 °F [10 °C - 30 °C])
CAUTION
■When filling the reservoir
Take care because brake fluid can harm your hands or eyes and damage painted
surfaces.
If fluid gets in your eyes, flush your eyes with clean water immediately.
If you still experience discomfort, see a doctor.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear or
when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, it may indicate a serious problem.

336
4-3. Do-it-yourself maintenance
ES350_U_(L/O_0708)
Fuse layout and amperage ratings■ Engine compartment
FuseAmpereCircuit
1PSB30 APre-collision seat belt
2H-LP CLN30 A
3P-P / SEAT30 APo w e r s e a t
4RR DEF50 ARear window defogger
5ABS NO.230 AAnti-lock brake system, vehicle stabil-
ity control system
6FAN MAIN50 AElectric cooling fans
7ABS NO.150 AAnti-lock brake system, vehicle stabil-
ity control system
8HTR50 AAir conditioning system
9RR FOG10 A
10ALT-CDS10 AAlternator condenser
11ST30 AStarting system

340
4-3. Do-it-yourself maintenance
ES350_U_(L/O_0708)
15ECU-IG NO. 110 A
Moon roof, seat heaters, power win-
dows, clock, automatic windshield
wiper, electric cooling fans, driving
position memory system, seat position
memory system
16ECU-IG NO. 27. 5 A
Anti-lock brake system, vehicle stabil-
ity control system, traction control sys-
tem, brake assist system, cruise
control system, stop lights, shift lock
control system
17A/C NO. 210 AAir conditioning system, rear window
defogger
18WA S H10 AWindshield washer
19S-HTR20 ASeat heaters, air conditioning system
20GAUGE NO. 110 AEmergency flashers, back-up lights,
rear sunshade, charging system
21WIP25 AWindshield wipers
22H - L P LV L7. 5 AHeadlight leveling system
23IGN10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, SRS airbag system, steering lock
system
24GAUGE NO. 27. 5 AMeters
25ECU-ACC7. 5 AClock, main body ECU
26CIG20 ACigarette lighter
27PWR OUTLET20 APower outlet
28RADIO NO. 27. 5 AAudio system
29MIR HTR15 AOutside rear view mirror defoggers
FuseAmpereCircuit

352
ES350_U_(L/O_0708)
5-1. Essential information
If your vehicle needs to be towed
Before towingThe following may indicate a problem with your transmission. Contact
your Lexus dealer before towing.
● The engine is running, but the vehicle will not move.
● The vehicle makes an abnormal sound.
Emergency towing
If a tow truck is not available, in an emergency your vehicle may be tem-
porarily towed using a cable or chain secured to the emergency towing
eyelet. This should only attempted on hard, surfaced roads for short dis-
tances at low speeds.
A driver must be in the vehicle to steer and operate the brakes. The vehi-
cle’s wheels, drive train, axles, steer ing and brakes must be in good condi-
tion.
Towing eyelet
If towing is necessary, we recommend having your vehicle towed by your
Lexus dealer or a commercial towing se rvice, using a lift-type truck or a flat
bed truck.
Use a safety chain system for all towing, and abide by all state/provincial
and local laws.
If towing from the front, the vehicle’s rear wheels and axles must be in good
condition. ( →P. 3 5 6 )
If they are damaged, use a towing dolly or flat bed truck.

5
When trouble arises
353
5-1. Essential information
ES350_U_(L/O_0708)
Installing towing eyeletRemove the eyelet cover using a
flat head screwdriver.
To protect the bodywork, place a
rag between the screwdriver and
the vehicle body, as shown in the
illustration.
■Emergency towing procedureRelease the parking brake.
Shift the shift lever to N.
Turn the “ENGINE START STOP” switch to ACCESSORY mode (engine
off) or IGNITION ON mode (engine running) position.
CAUTION
■Caution while towing
●Use extreme caution when towing the vehicle.
Avoid sudden starts or erratic driving maneuvers which place excessive stress on
the emergency towing eyelets and the cables or chains.
●If the engine is not running, the power assist for the brakes and steering will not
function, making steering and braking more difficult.
NOTICE
■To prevent causing serious damage to the transmission
Never tow this vehicle from the rear with front wheels on the ground.
This may cause serious damage to the transmission.
STEP1
STEP2
STEP3
STEP1

356
5-1. Essential information
ES350_U_(L/O_0708)
Towing with a wheel lift-type truckFrom the front Release the parking brake.
From the rear Use a towing dolly under the front
wheel.
NOTICE
■To prevent damaging the vehicle
When raising the vehicle, ensure adequate ground clearance for towing at the
opposite end of the raised vehicle. Without adequate clearance, the vehicle could
be damaged while being towed.
NOTICE
■To prevent causing serious damage to the transmission
Never tow this vehicle from the rear with the front wheels on the ground.

358
5-1. Essential information
ES350_U_(L/O_0708)
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
● Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points
higher than normal
■ Audible symptoms
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
● Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spongy feeling, pedal almost touches
the floor

360
5-1. Essential information
ES350_U_(L/O_0708)
Event data recorder
In a crash or a near car crash eventThe SRS airbag sensor assembly contains the EDR. In a crash or a near
car crash event, this device may record some or all of the following infor-
mation:
● Engine speed
● Whether the brake pedal was applied or not
● Vehicle speed
● To what extent the accelerator pedal was depressed
● Position of the transmission shift lever
● Whether the driver and front passenger wore seat belts or not
● Driver's seat position
● Front passenger's occupant classification
● SRS airbag deployment data
● SRS airbag system diagnostic data
The VSC Electronic Control Unit (ECU) may contain another EDR. In
case the VSC or brake assist system is activated, or the lateral accelera-
tion is beyond a certain valve, this device may record some or all of the
following information:
● Behavior of the vehicle
● Steering wheel angle
Your vehicle has computers that monitor and control certain aspects of
your vehicle. These computers assist in driving and maintaining optimal
vehicle performance.
Besides storing data useful for troubleshooting, there is a system to
that record data in a crash or a near car crash event.

5
When trouble arises
361
5-1. Essential information
ES350_U_(L/O_0708)●
Vehicle speed
● To what extent the accelerator pedal was depressed
● To what extent the brake pedal was applied
● To what extent the ECU controlled the condition of the 4 wheels
● Vehicle stability control system diagnostic data
The information above is intended to be used for the purpose of improv-
ing vehicle safety performance. Unlike general data recorders, the EDR
does not record sound data such as conversation between passengers.
Disclosure of the data
Lexus will not disclose the data recorded in an EDR to a third party
except when:
● An agreement from the vehicle's owner (or the leasing company for a
leased vehicle) is obtained
● Officially requested by the police or other authorities
● Used as a defense for Lexus in a law suit
● Ordered by a court law
However, if necessary Lexus will:
● Use the data for research on Lexus vehicle safety performance
● Disclose the data to a third party for research purposes without dis-
closing details of the vehicle owner, and only when it is deemed neces-
sary
● Disclose summarized data cleared of vehicle identification information
to a non-Lexus organization for research purposes

362
ES350_U_(L/O_0708)
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
*: Parking brake engaged warning buzzer:
→P. 3 76
Warning lightWarning light/Details
(USA)
(Canada)
Brake system warning light (warning buzzer)*
Indicates the following;
• Low brake fluid
• Malfunction in the brake booster system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released the system is operating normally.
Calmly perform the following actions if any of the warning lights turn on or
flash. If a light turns on or flashes, but then turns off, this does not necessar-
ily indicate a malfunction in the system.