steering Lexus ES350 2008 Workshop Manual

337
4-3. Do-it-yourself maintenance
4
Maintenance and care
ES350_U_(L/O_0708)
12A LT140 A
PSB, H-LP CLN, P-P/SEAT, RR DEF,
ABS NO.2, FAN MAIN, ABS NO.1,
HTR, RR FOG, RR DOOR RH, RR
DOOR LH, FUEL OPN, FR FOG,
OBD, STOP, TI & TE, A/C, PWR,
DOOR NO.2, S/ROOF, GAUGE
NO.2, POWER, P/SEAT
13STR LOCK20 ASteering lock system
14IG220 A
GAUGE NO.2, IGN, multiport fuel
injection system/sequential multiport
fuel injection system
15HAZ15 ATurn signal lights
16ETCS10 AElectronic throttle control system
17E-ACM10 AElectric active control mount
18A/C CTRL PNL15 AAir conditioning system
19A LT- S7. 5 ACharging system
20AM27. 5 AStarting system
21EFI MAIN30 AEFI NO.2, EFI NO.3, fuel system, ECT
system
22AMP30 AAudio system
23AMP230 AAudio system
24DOOR NO.125 APower door lock system
25R A D I O N O.115 AAudio system
26ECU-B NO.110 AECU powers
27DOME10 AInterior lights, meters, vanity lights
28H-LP (LH)15 ALeft-hand headlight (high beam)
29H-LP (RH)15 ARight-hand headlight (high beam)
FuseAmpereCircuit

339
4-3. Do-it-yourself maintenance
4
Maintenance and care
ES350_U_(L/O_0708)■
Driver’s side instrument panel
FuseAmpereCircuit
1RR DOOR RH25 APower window
2RR DOOR LH25 APower window
3FUEL OPN7. 5 AFuel filler door opener
4FR FOG15 AFront fog lights
5OBD7. 5 AOn-board diagnosis system
6ECU-B NO.27. 5 AECU powers
7STO P10 AStop lights
8TI & TE30 ATilt and telescopic steering
9A/C7. 5 AAir conditioning system
10PWR25 APower windows
11DOOR NO.225 AMain body ECU
12S/ROOF30 AMoon roof
13TA I L10 AFront and rear side marker lights, tail
lights, license plate lights
14PA N E L7. 5 ASwitch illumination

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

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

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.

370
5-2. Steps to take in an emergency
ES350_U_(L/O_0708)
■If the tire pressure warning light comes on after blinking for 1 minute frequently
If the tire pressure warning light comes on after blinking for 1 minute frequently
when the “ENGINE START STOP” switch is turned to IGNITION ON mode, have
it checked by your Lexus dealer.
■Customization that can be configured at Lexus dealer
The vehicle speed linked seat belt reminder buzzer can be disabled. (Customizable
features →P. 433)
CAUTION
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres-
sure immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If the tire is flat,
change to the spare tire and have the flat tire repaired by the nearest Lexus
dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could
lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

372
5-2. Steps to take in an emergency
ES350_U_(L/O_0708)
CAUTION
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres-
sure immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If the tire is flat,
change to the spare tire and have the flat tire repaired by your Lexus dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could
lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not active immediately.
NOTICE
■Precaution when installing a different tire
When a tire of a different specification or maker is installed, the tire pressure warn-
ing system may not operate properly.

374
5-2. Steps to take in an emergency
ES350_U_(L/O_0708)
Have the vehicle inspected by your Lexus dealer immediately.Failing to investigate the cause of the following warnings may lead to the
system operating abnormally and possibly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
Warning messageDetails
(Flashing)
Indicates a malfunction in the steering lock system. A buzzer also sounds.
(If equipped)
Indicates a malfunction in the pre-collision system.A buzzer also sounds.

5
When trouble arises
383
5-2. Steps to take in an emergency
ES350_U_(L/O_0708)*: If the engine does not start when the electronic key is inside the vehicle,
the electronic key battery may be de pleted or there may be difficulties
receiving the signal from the key. ( →P. 2 6 )
Interior
buzzerExterior buzzerWarning messageDetailsCorrection
procedure

Indicates that a
door has been
opened or closed
and the “ENGINE
START STOP”
switch has been
switched twice to
ACC ESSO RY
mode from OFF.
Press the
“ENGINE START
STO P ” s w i t c h
while applying the
brakes.

(Comes on for 15 seconds.)
(Flashing)
Indicates that the
steering lock has
not released.
Press the
“ENGINE START
STO P ” s w i t c h
again while turn-
ing the steering
wheel with the
brake pedal
depressed.
OnceIndicates that the
electronic key
does not operate
properly.
→ P. 3 9 9


5
When trouble arises
395
5-2. Steps to take in an emergency
ES350_U_(L/O_0708)
Emergency start functionWhen the engine does not start, the following steps can be used as an
interim measure to start the engine if the “ENGINE START STOP” switch
is functioning normally. Set the parking brake.
Shift the shift lever to P.
Set the “ENGINE START STOP” switch to the ACCESSORY
mode.
Push and hold the “ENGINE START STOP” switch about 15 sec-
onds while depressing the brake pedal firmly.
Even if the engine can be started using the above steps, the system may
be malfunctioning. Have the vehicle checked by your Lexus dealer.
■ The starter motor does not turn over, the interior lights and head-
lights do not turn on, or the horn does not sound.
One of the following may be the cause of the problem.
●One or both of the battery terminals may be disconnected.
● The battery may be discharged. ( →P. 4 0 0 )
● There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.
STEP1
STEP2
STEP3
STEP4