Page 301 of 580

301 2-4. Using other driving systems
2
When driving
PRIUS +_OM_OM47821E_(EE)
Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from
overheating when there is frequent steering input over an extended period of
time. The steering wheel may feel heavy as a result. Should this occur,
refrain from excessive steering input or stop the vehicle and turn the hybrid
system off. The EPS system should return to normal within 10 minutes.
Electric power steering system warning light (warning buzzer)
P. 478
Operating conditions of emergency brake signal
When the following three conditions are met, the emergency brake signal
will operate:
The emergency flashers are off.
Actual vehicle speed is over 55 km/h (35 mph).
The brake pedal is depressed in a manner that cause the system to
judge from the vehicle deceleration that this is a sudden braking opera-
tion.
Automatic system cancelation of emergency brake signal
The emergency brake signal will turn off in any of the following situations:
The emergency flashers are turned on.
The brake pedal is released.
The system judges from the vehicle deceleration that is not a sudden
braking operation.
Page 438 of 580

438 4-3. Do-it-yourself maintenance
PRIUS +_OM_OM47821E_(EE)
FUSEAmpereCircuit
12 P CON MAIN 7.5AP position control system, trans-
mission
13 AM2 7.5A Power management system
14 ECU-B2 7.5A Smart entry & start system
15 MAYDAY 10A No circuit
16 ECU-B3 10A Air conditioning system
17 TURN & HAZ 10A Turn signal lights
18 ETCS 10AMultiport fuel injection system/
sequential multiport fuel injection
system
19ABS MAIN
NO.120A Anti-lock brake system
20 P/I 2 40AHorn, right-hand headlight (low
beam), left-hand headlight (low
beam), back-up lights
21 ABS MTR 1 30A Anti-lock brake system
22 ABS MTR 2 30A Anti-lock brake system
23 H-LP HI MAIN 20AH-LP HI RH, H-LP HI LH,
headlight switch, daytime running
light system
24 HV BATT 10AHybrid system, hybrid battery
(traction battery)
25 DRL 7.5A Daytime running light system
26 P/I 1 60A IG2, EFI MAIN, BATT FAN
27 EPS 60A Electric power steering
28 PCU 10A Inverter and converter
29 IGCT NO.2 10AHybrid system, P position control
system, inverter and converter
Page 441 of 580
441 4-3. Do-it-yourself maintenance
4
Maintenance and care
PRIUS +_OM_OM47821E_(EE)
FUSEAmpereCircuit
14 STOP 10AStop lights, high mounted stop-
light, brake system, driver support
system
15 P FR DOOR 25A Power windows
16 D FR DOOR 25A Power windows
17 DOOR RR 25A Power windows
18 DOOR RL 25A Power windows
19 S/ROOF 30A Panoramic roof shades
20 ECU-IG NO.1 10AElectric cooling fans, multiplex
communication system
21 ECU-IG NO.2 10ADriver support system, Pre-crash
safety System, inside rear view
mirror, yaw rate & G sensor, brake
system, electric power steering,
navigation system, panoramic roof
shades, seat belt pretensioners,
audio system, emergency flash-
ers, turn signal lights, windshield
wipers, headlight cleaner
22 GAUGE 10AHeadlight leveling system, seat
belt reminder light, gauges and
meters
23 A/C 10A Air conditioning system
24 WASHER 15A Windshield washer
25 RR WIP 20A Rear window wiper and washer
Page 445 of 580
445
4-3. Do-it-yourself maintenance
4
Maintenance and care
PRIUS +_OM_OM47821E_(EE)
Light bulbs
You may replace the following bulbs by yourself. The difficulty level
of replacement varies depending on the bulb. As there is a danger
that components may be damaged, we recommend that replacement
is carried out by any authorized Toyota dealer or repairer, or another
duly qualified and equipped professional.
Preparing for light bulb replacement
Check the wattage of the light bulb to be replaced. (P. 551)
Front bulb locations
Headlight low beam
Headlight
high beam
Front fog light (if equipped)
Front turn
signal light
Front position light
Page 446 of 580
446 4-3. Do-it-yourself maintenance
PRIUS +_OM_OM47821E_(EE)
Rear bulb locations
Rear turn signal light
Rear fog light (left-hand drive vehicles) or back-up lightLicense plate lightsRear fog light (right-
hand drive vehicles)
or back-up light
Page 453 of 580
453 4-3. Do-it-yourself maintenance
4
Maintenance and care
PRIUS +_OM_OM47821E_(EE)Front turn signal lights
Remove the fender liner bolt and clip and pull down the fender
liner. (P. 451)
Turn the bulb base counterclock-
wise.
Remove the light bulb.
When installing, reverse the steps listed.
STEP 1
STEP 2
STEP 3
STEP 4
Page 454 of 580
454 4-3. Do-it-yourself maintenance
PRIUS +_OM_OM47821E_(EE)Rear turn signal lights and back-up/rear fog light
Open the back door and remove
the cover.
To prevent damage, cover the tip
of the screwdriver with a rag.
Turn the bulb base counterclock-
wise.
Rear turn signal light
Back-up/rear fog light
Remove the light bulb.
Rear turn signal light
Back-up/rear fog light
When installing, reverse the steps listed.
STEP 1
STEP 2
ITO43P147
STEP 3
STEP 4
Page 456 of 580

456 4-3. Do-it-yourself maintenance
PRIUS +_OM_OM47821E_(EE)Replacing the following bulbs
If any of the lights listed below has burnt out, have it replaced by
any authorized Toyota dealer or repairer, or another duly qualified
and equipped professional.
Headlight low beams (LED type)
Stop lights
Tail lights
Side turn signal lights
High mounted stoplight
Daytime running lights
LED lights
The headlight low beams (LED type), stop lights, tail lights, high mounted
stoplight and daytime running lights consist of a number of LEDs. If any of
the LEDs burn out, take your vehicle to any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional to have the
light replaced.
Condensation build-up on the inside of the lens
Contact any authorized Toyota dealer or repairer, or another duly qualified
and equipped professional for more information in the following situations.
Temporary condensation build-up on the inside of the headlight lens does
not indicate a malfunction.
Large drops of water have built up on the inside of the lens.
Water has built up inside the headlight.
When replacing light bulbs
P. 443