ECU LEXUS LX570 2015 Repair Manual

7954-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L96U_(U) ■ Engine compartment (fuse box on the right side)
Fuse Ampere Circuit
1 HWD1 30 A No circuit
2 TOW BRK 30 A Brake controller
3 RR P/SEAT 30 A Power second seat
4 PWR HTR 7.5 A No circuit
5 DEICER 20 A Windshield wiper de-icer
6 ALT-CDS 10 A ALT-CDS
7 SECURITY 5 A SECURITY
8 SEAT A/C RH 25 A Seat heaters and ventilators
9 AI PMP HTR 10 A AI pump heater
10 TOW TAIL 30 A Towing tail light system
11 HWD2 30 A No circuit

7964-3. Do-it-yourself maintenance
LX570_OM_OM60L96U_(U) ■ Driver’s side instrument panel
Fuse Ampere Circuit
1 CIG 15 A Cigarette lighter
2 BK/UP LP 10 A Back-up lights, trailer
3 ACC 7.5 A Audio system, parking assist system,
multi-display assembly, main body
ECU, mirror ECU, satellite radio,
smart access system with push-but-
ton start

7974-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L96U_(U) 4 PANEL 10 A Ashtray, brake controller, cigarette
lighter, cool box, center differential
lock, driving mode switches, multi-
information display, air conditioning
system, glove box light, audio system,
emergency flashers, headlight cleaner
switch, driving position memory but-
tons, outside rear view mirror
switches, overhead module, roll sens-
ing of curtain shield airbags off switch,
rear heater panel, shift lever switch,
power back door main switch, camera
switch, VSC OFF switch, steering
switch, console switch, instrument
panel light control
5 ECU-IG No.2 10 A Air conditioning system, rear heater
panel, overhead module, ABS, VSC,
steering sensor, yaw rate & G sensor,
main body ECU, stoplights, moon
roof, anti-glare inside rear view mirror
6 WINCH 5 A No circuit
7 A/C IG 10 A Cool box, condenser fan, cooler com-
pressor, rear window and outside rear
view mirror defoggers, smog sensor
8 TAIL 15 A Tail lights, license plate lights, front fog
lights, parking lights, side marker
lightsFuse Ampere Circuit

7984-3. Do-it-yourself maintenance
LX570_OM_OM60L96U_(U) 9 WIPER 30 A Windshield wiper
10 WSH 20 A Windshield washer
11 RR WIPER 15 A Rear window wiper and washer
12 4WD 20 A Four-wheel drive system
13 LH-IG 5 A Alternator, towing, seat heater and
ventilators, windshield wiper de-icer,
front seat belt, emergency flasher,
inverter switch, shift lever switch
14 ECU-IG No.1 5 A ABS, VSC, tilt and telescopic steer-
ing, gateway ECU, shift lock system,
parking assist system, cruise control
switch, pre-collision system, headlight
cleaner, multi-display assembly, rain-
sensing windshield wiper, driving
position memory system, power door
lock system
15 S/ROOF 25 A Moon roof
16 RR DOOR RH 20 A Power windows
17 MIR 15 A Mirror ECU, outside rear view mirror
defoggers
18 RR DOOR LH 20 A Power windows
19 FR DOOR LH 20 A Power windows
20 FR DOOR RH 20 A Power windowsFuse Ampere Circuit

7994-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L96U_(U) 21 RR FOG 7.5 A No circuit
22 A/C 7.5 A Air conditioning system
23 AM1 5 A No circuit
24 TI & TE 15 A Tilt and telescopic steering
25 FR P/SEAT RH 30 A Power seat
26 PWR OUTLET 15 A Power outlet
27 OBD 7.5 A On Board Diagnostics
28 PSB 30 A Pre-collision system
29 DR/LCK 25 A Main body ECU
30 FR P/SEAT LH 30 A Power seat
31 INVERTER 15 A InverterFuse Ampere Circuit

8004-3. Do-it-yourself maintenance
LX570_OM_OM60L96U_(U) ■ Passenger’s side instrument panel
Fuse Ampere Circuit
1 RSF LH 30 A Third seat adjustment (left)
2 B/DR CLSR RH 30 A Back door closer
3 B/DR CLSR LH 30 A Back door closer
4 RSF RH 30 A Third seat adjustment (right)
5 DOOR DL 15 A No circuit
6 AHC-B 20 A 4-Wheel AHC
7 TEL 5 A Multimedia
8 TOW BK/UP 7.5 A Towing
9 AHC-B No.2 10 A 4-Wheel AHC
10 ECU-IG No.4 5 A VGRS, power back door, rear ECU,
4-Wheel AHC, third seat adjustment,
tire pressure warning system ECU

8014-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L96U_(U) Fuse Ampere Circuit
11 SEAT-A/C FAN 10 A Ventilators
12 SEAT-HTR 20 A Seat heaters
13 AFS 5 A Adaptive Front-lighting System
14 ECU-IG No.3 5 A Adaptive Front-lighting System,
dynamic radar cruise control system
15 STRG HTR 10 A Heated steering wheel
16 TV 10 A Multi-display assembly■
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. 803)●
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, protec ting the wiring harness from damage.

8064-3. Do-it-yourself maintenance
LX570_OM_OM60L96U_(U) Replace the light bulb, and install
the bulb base. Align the 3 tabs on the light bulb
with the mounting, and insert.
Turn and secure the bulb base. Shake the bulb base gently to
check that it is not loose, turn the
headlights on once and visually
confirm that no light is leaking
through the mounting.
When installing the cover, conduct in reverse. STEP 4
STEP 5
STEP 6 STEP 1

8124-3. Do-it-yourself maintenance
LX570_OM_OM60L96U_(U) CAUTION■
Replacing light bulbs ●
Turn off the headlights. Do not attempt to replace the bulb immediately after
turning off the headlights.
The bulbs become very hot and may cause burns. ●
Do not touch the glass portion of the li ght bulb with bare hands. When it is
unavoidable to hold the glass portion, use and hold with a clean dry cloth to avoid
getting moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack. ●
Fully install light bulbs and any parts used to secure them. Failing to do so may
result in heat damage, fire, or water en tering the headlight unit. This may damage
the headlights or cause condensation to build up on the lens. ●
While the low beam headlights are turned
on, and for a short time after they have
been turned off, metal components at the
rear of the headlight assembly will be
extremely hot.
To prevent burns, do not touch these metal
components until you are certain they have
cooled down.Metal components

8205-1. Essential information
LX570_OM_OM60L96U_(U) 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
hook. This should only be attempted on hard surfaced roads for 50 miles
(80 km) 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 con-
dition.
Towing hook