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4-3. Do-it-yourself maintenance
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 ATurn signal lights
16ETCS10 AElectronic throttle control system
17E-ACM10 AElectric active control mount
18A/C CTRL PNL15 AAir conditioning system
19ALT-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
25RADIO NO.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  
         
        
        
     
        
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4-3. Do-it-yourself maintenance
4
Maintenance and care
14PA N E L7. 5  A
Seat heaters, air conditioning system, 
audio system, rear sunshade, steering 
switches, fuel filler door opener, out-
side rear view mirror
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
FuseAmpereCircuit  
         
        
        
     
        
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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
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.  3 2 5 )
●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 before the entire wiring harness is damaged.
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.
FuseAmpereCircuit