2012 TOYOTA HIGHLANDER HYBRID ECU

463
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compartment cover
■ Removing the engine compartment cover
■ Installing the clips
NOTICE
■After installing an engine compartment cover
Make sure that the cover is securely installed in its original position.

502 4-3. Do-it-yourself maintenance
4 HTR50 A Air conditioning system
5 FAN NO.1 50 A Electric cooling fan
6 FAN NO.2 50 A Electric cooling fan
7 ABS NO.1 50 A Brake system
8 RR CLR 40 A Air conditioning system
9 SPARE 40 A Spare fuse
10 RR DEF 30 A Rear window defogger
11 PBD 30 A Power back door
12 HV R/B NO.2 50 A ABS MAIN NO.1, ABS MAIN NO.2,
BATT FAN, OIL PMP
13 HV R/B NO.1 30 A Hybrid system, PCU, IGCT NO.2
IGCT NO.3, INV W/P
14 PD 50 AA/F, HORN, H-LP RH HI, H-LP LH
HI, H-LP RH LO, H-LP LH LO,
S-HORN
15 ABS NO.2 50 A Brake system
16 EPS 80 A Electric power steering
17 DC/DC 150 ARR DOOR RH, RR DOOR LH, FR
FOG, OBD, A/C W/PMP, STOP,
DOOR NO.2, AM1, P/SEAT(PS),
A/C NO.1, FUEL OPN, S/ROOF,
TAIL, PANEL, ECU IG NO.1, ECU
IG NO.2, A/C NO.2, WASH,
S-HTR, GAUGE NO.1, FR WIP,
RR WIP, ECU-ACC, ACC SOCK
NO.1, ACC SOCK NO.2, RADIO
NO.2, P/SEAT, POWER
18 EFI MAIN 30 AMultiport fuel injection system/
sequential multiport fuel injection
system, EFI NO.1, EFI NO.2, EFI
NO.3, F/PMP
19 TOWING 30 A Trailer lights
FuseAmpereCircuit

503
4-3. Do-it-yourself maintenance
4
Maintenance and care
20 ST
10 A Starting system
21 IG2 30 A INJ, GAUGE NO.2, IGN
22 STRG LOCK 20 A Steering lock system
23 RADIO NO.1 20 A Audio system
24 ABS MAIN
NO.3 15 AElectronically controlled brake sys-
tem
25 AMP 15 A Audio system
26 HAZ 15 A Turn signal lights
27 CAPACITER 15 A Brake system
28 G/H 10 AGlass hatch, multiplex communica-
tion system, outer foot lights
29 CRT 10 ARear seat entertainment system,
audio system
30 ETCS 15 AMultiport fuel injection system/
sequential multiport fuel injection
system
31 AM2 7.5 A Multiplex communication system
32 ECU-B NO.2 7.5 A Air conditioning system
33 HV MAIN 10 A Hybrid system
34 DOME 10 AVanity lights, personal lights, inte-
rior light, gauges and meters, door
courtesy lights, engine switch light
35 ECU-B NO.1 10 A Steering sensor, gauges and
meters, main body ECU, wireless
remote control, smart key system,
power back door, on-board diagno-
sis system, multi-information dis-
play
36 EFI NO.1 10 AMultiport fuel injection system/
sequential multiport fuel injection
system, smart key system
FuseAmpereCircuit

507
4-3. Do-it-yourself maintenance
4
Maintenance and care
11 P/SEAT (PS) 30 A Power seat
12 A/C NO.1 10 A Air conditioning system
13 FUEL OPN 7.5 A Fuel filler door opener
14 S/ROOF 20 A Electric moon roof
15 TAIL 15 A Side marker lights, tail lights,
license plate lights, fog lights, trailer
lights
16 PANEL 7.5 A Glove box light, instrument panel
lights, switch illumination
17 ECU IG NO.1 10 A Multiplex communication system,
electric moon roof, electronically
controlled transmission system,
power back door, seat heaters, tire
pressure warning system, electric
power steering, auto anti-glare
inside rear view mirror, shift lock
system
18 ECU IG NO.2 7.5 A Brake system
19 A/C NO.2 10 A Air conditioning system, electric
cooling fan
20 WASH 20 A Windshield and rear window
washer
21 S-HTR 20 A Seat heaters
22 GAUGE NO.1 10 A Audio system, back-up lights,
emergency flashers, traction con-
trol system, windshield wiper
deicer, rear view monitor system,
power outlet, air conditioning sys-
tem
23 FR WIP 30 A Windshield wipers and washer
24 RR WIP 15 A Rear window wiper and washer
FuseAmpereCircuit

508 4-3. Do-it-yourself maintenance
■Luggage compartment
25 IGN 10 AMultiport fuel injection system/
sequential multiport fuel injection
system, steering lock system,
smart key system, SRS airbag sys-
tem, hybrid system, electronically
controlled brake system
26 GAUGE NO.2 7.5 A Gauges and meters, rear view
monitor system
27 ECU-ACC 7.5 A Outside rear view mirrors, shift lock
system, smart key system, multi-
plex communication system
28 ACC SOCK
NO.1 15 A Power outlet
29 ACC SOCK
NO.2 15 A Power outlet
30 RADIO NO.2 7.5 A Audio system, rear seat entertain-
ment system, interior lights, per-
sonal lights
FuseAmpereCircuit
1 DC/DC-S 7.5 A Hybrid system
2 MAIN 180 A All electrical components
FuseAmpereCircuit

517
4-3. Do-it-yourself maintenance
4
Maintenance and care
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 light bulb with bare hands. Hold the
bulb by the plastic or metal portion.
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 entering the headlight unit. This
may damage the headlights or cause condensation to build up on the lens.
■ To prevent damage or fire
Make sure bulbs are fully seated and locked.

522 5-1. Essential information
Emergency towingIf a tow truck is not available, in an emergency your vehicle may be
temporarily towed using a cable or chain secured to the emergency
towing eyelet(s). This should only be attempted on hard surfaced
roads for short distances below 18 mph (30 km/h).
A driver must be in the vehicle to steer and operate the brakes. The
vehicle’s wheels, drive train, axles, steering and brakes must be in
good condition.
Towing eyelets
■Emergency towin g procedure
Release the parking brake.
Shift the shift lever to N.
Vehicles without smart key system:
Turn the engine switch to “ACC” (hybrid system off) or “ON” (hybrid
system operating) position.
Vehicles with smart key system:
Turn the “POWER” switch to ACCESSORY (hybrid system off)
mode or ON (hybrid system operating) mode.
STEP1
STEP2
STEP3

524 5-1. Essential information
Tighten down the towing eyelet
securely using a wheel nut
wrench.
Towing with a sling-type truck
STEP3
■Location of the emer gency towing eyelet
P. 539
CAUTION
■ Installing towing eyelet to the vehicle
Make sure that towing eyelet is installed securely.
If not securely installed, towing eyelet may come loose during towing. This
may lead to accidents that cause serious injury or even death.