2012 Lexus ES350 ECT

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4-3. Do-it-yourself maintenance
4
Maintenance and care
ES350_U
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown.
If this happens, check and replace the fuses as necessary.
Turn the “ENGINE START STOP” switch OFF.
Remove the engine compartment cover. ( →P. 3 7 8 )
Open the fuse box cover.
Engine compartment
Push the tabs in and lift the lid
off.
Driver's side instrument panel Remove the lid.
After a system failure, see “Fuse layout and amperage ratings”
(→ P. 412) for details about which fuse to check.STEP1
STEP2
STEP3
STEP4

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4-3. Do-it-yourself maintenance
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Fuse layout and amperage ratings■ Engine compartment
FuseAmpereCircuit
1PSB30 APre-collision seat belt
2H-LP CLN30 A
3P- P / S E AT30 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
6FA N M A I N50 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

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4-3. Do-it-yourself maintenance
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Maintenance and care
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12ALT140 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 ATu r n s i g n a l l i g h t s
16ETCS10 AElectronic throttle control system
17E-ACM10 AElectric active control mount
18A/C CTRL PNL15 AAir conditioning system
19MAYDAY10 AMAYDAY
20ALT-S7. 5 ACharging system
21AM27. 5 AStarting system
22EFI MAIN30 AEFI NO.2, EFI NO.3, fuel system, ECT
system
23AMP30 AAudio system
24AMP230 AAudio system
25DOOR NO.125 APower door lock system
26RADIO NO.115 AAudio system
27ECU-B NO.110 AECU powers
28DOME10 AInterior lights, meters, vanity lights
29H-LP (LH)15 ALeft-hand headlight (high beam)
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
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30H-LP (RH)15 ARight-hand headlight (high beam)
31H-LP (LL)15 ALeft-hand headlight (low beam)
32H-LP (RL)15 ARight-hand headlight (low beam)
33HORN10 AHorns
34EFI NO.110 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, ECT system
35MPX-B10 AMeters
36A/F20 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
37S-HORN7. 5 AS-HORN
38EFI NO.215 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
39EFI NO.310 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
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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-LP LVL7. 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 APo w e r o u t l e t
28RADIO NO. 27. 5 AAudio system
29MIR HTR15 AOutside rear view mirror defoggers
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
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Maintenance and care
ES350_U
30POWER30 APo w e r w i n d o w
31P/ S E AT30 APo w e r s e a t
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may
need replacement. (→P. 4 2 0 )
●If the replaced fuse blows again, have the vehicle inspected by your Lexus
dealer.
■If there is an overload in the circuits
The fuses are designed to blow, protecting the wiring harness from damage.
CAUTION
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failing to do so may cause damage, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than indicated, or use any other
object in place of a fuse.
●Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
This can cause extensive damage or even fire.
●Do not modify fuses or the fuse box.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer.
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
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Headlight aim (vehicles with discharge headlights)
■Vertical movement adjusting bolts
Adjustment bolt A
Adjustment bolt B
■ Before checking the headlight aim
Make sure the vehicle has a full tank of gas and the area around
the headlight is not deformed.
Park the vehicle on level ground.
Sit in the driver’s seat.
Bounce the vehicle several times.
■ Adjusting the headlight aim
Remove the engine compartment cover. ( →P. 3 7 8 )
Turn bolt A in either direction
using a Phillips-head screw-
driver.
Remember the turning direction
and the number of turns in mind.
STEP1
STEP2
STEP3
STEP4
STEP1
STEP2

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4-3. Do-it-yourself maintenance
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Maintenance and care
ES350_U
Turn bolt B the same number of
turns and in the same direction
as step 1 using a Phillips-head
screwdriver.
If the error is over the value
specified above, take the vehicle
to your Lexus dealer to adjust
the headlight aim.
STEP3