ECU TOYOTA xB 2012 (in English) Owner's Guide

260 4-3. Do-it-yourself maintenance
Scion_xB_OM_OM12G11U_(U)
9 H-LP MAIN 50 AH-LP LH LO, H-LP RH LO, H-LP
LH HI, H-LP RH HI
10 ECU-B2 10 A Air conditioning system
11 ECU-B 10 A Gauges and meters, body ECU,
vehicle stability control system
12 RAD NO.1 15 A Audio system
13 DOME 10 A Interior light, personal light, lug-
gage compartment light, wireless
remote control system
14 AM2 NO.2 7.5 A No circuit
15 ALT-S 7.5 A Charging system
16 TURN-HAZ 10 A Turn signal lights, emergency
flashers
17 ETCS 10 A Multiport fuel injection system/
sequential multiport fuel injection
system
18 AM2 30 A Multiport fuel injection system/
sequential multiport fuel injection
system, starting system
19 STRG LOCK 20 A No circuit
20 SPARE Spare fuse
21 SPARE Spare fuse
22 SPARE Spare fuse
23 EFI MAIN 20 A Multiport fuel injection system/
sequential multiport fuel injection
system, EFI NO.1, EFI NO.2
24 HORN 10 A Horn
FuseAmpereCircuit

262 4-3. Do-it-yourself maintenance
Scion_xB_OM_OM12G11U_(U)
■Under the driver’s side instrument panel
FuseAmpereCircuit
1 TAIL 10 A Parking lights, tail lights, side
marker lights, gauges and meters,
license plate lights, multiport fuel
injection system/ sequential multi-
port fuel injection system
2 PANEL 7.5 A Instrument cluster lights, instru-
ment panel lights, gauges and
meters
3 FR DOOR 20 A Power windows
4 RL DOOR 20 A Power windows
5 RR DOOR 20 A Power windows
6 SUNROOF 20 A No circuit
7 CIG 15 A Cigarette lighter
8 ACC 7.5 A Outside rear view mirror switch,
shift lock control system, audio sys-
tem, body ECU

263
4-3. Do-it-yourself maintenance
4
Maintenance and care
Scion_xB_OM_OM12G11U_(U)
9 MIR HTR
10 AMultiport fuel injection system/
sequential multiport fuel injection
system, outside rear view mirror
defoggers
10 IGN 7.5 AMultiport fuel injection system/
sequential multiport fuel injection
system, SRS airbag system, steer-
ing lock system
11 METER 7.5 A Gauges and meters
12 HTR-IG 10 A Air conditioning system
13 WIPER 25 A Windshield wipers
14 RR WIPER 15 A Rear window wiper
15 WASHER 15 A Washer
16 ECU-IG NO.1 10 A Multiport fuel injection system/
sequential multiport fuel injection
system, electric power steering,
electric cooling fan, anti-lock brake
system, vehicle stability control
system, shift lock control system,
audio system, body ECU
17 ECU-IG NO.2 10 A Back-up light, emergency flasher,
air conditioning system, rear win-
dow defogger, charging system,
multiport fuel injection system/
sequential multiport fuel injection
system, front passenger’s seat belt
reminder light
FuseAmpereCircuit

264 4-3. Do-it-yourself maintenance
Scion_xB_OM_OM12G11U_(U)
■Driver’s side instrument panel
18 OBD 7.5 A On-board diagnosis system
19 STOP 10 AStop lights, high mounted stop-
light, multiport fuel injection sys-
tem/ sequential multiport fuel
injection system, anti-lock brake
assist system, body ECU
20 DOOR 25 A Power door lock system, body ECU
21 ACC-B 25 A CIG, ACC
22 FR FOG 15 A No circuit
23 AM1 7.5 AStarting system, shift lock control
system
FuseAmpereCircuit
1 POWER 30 A Power windows
2 DEF 30 A Rear window defogger, MIR HTR
3 PWR SEAT 30 A No circuit
FuseAmpereCircuit

275
4-3. Do-it-yourself maintenance
4
Maintenance and care
Scion_xB_OM_OM12G11U_(U)
■
LED light bulbs
The side turn signal lights and high mounted stoplight consist of a number of
LEDs. If any of the LEDs burn out, take your vehicle to your Scion dealer to
have the light replaced.
■ Condensation build-up on th e inside of the lens
Contact your Scion dealer 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.
CAUTION
■Replacing light bulbs
● Turn off the lights. Do not attempt to replace the bulb immediately after
turning off the lights.
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.

280 5-1. Essential information
Scion_xB_OM_OM12G11U_(U)
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 at low speeds.
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.
For vehicles with an automatic
transmission, only the front tow-
ing eyelet may be used.

5
When trouble arises
281
5-1. Essential information
Scion_xB_OM_OM12G11U_(U)
Installing towing eyelets
Remove the eyelet cover using a
flathead screwdriver.
To protect the bodywork, place a
rag between the screwdriver and
the vehicle body as shown in the
illustration.
Insert the towing eyelet into the
hole and tighten partially by
hand.
Tighten down the towing eyelet
securely using a wheel nut
wrench.
STEP 1
STEP 2
STEP 3

5
When trouble arises
285
5-1. Essential information
Scion_xB_OM_OM12G11U_(U)
CAUTION
■
Installing towing eyelets to the vehicle
Make sure that towing eyelets are installed securely.
If not securely installed, towing eyelets may come loose during towing. This
may lead to accidents that cause serious injury or even death.
NOTICE
■To prevent causing serious damage to the transmission when towing
using a wheel-lift type truck (vehicles with an automatic transmission)
Never tow this vehicle from the rear with the front wheels on the ground.
■ To prevent damage to the vehicle when towing using a wheel-lift type
truck (vehicles with a manual transmission)
● Do not tow the vehicle from the rear when the engine switch is in the
“LOCK” position or the key is removed. The steering lock mechanism is
not strong enough to hold the front wheels straight.
● When raising the vehicle, ensure adequate ground clearance for towing at
the opposite end of the raised vehicle. Without adequate clearance, the
vehicle could be damaged while being towed.
■ To prevent body damage when towing with a sling-type truck
Do not tow with a sling-type truck, either from the front or rear.
■ To prevent causing serious damage to the transmission in emergency
towing
Vehicles with an automatic transmission, never tow a vehicle from the rear
with four wheels on the ground. This may cause serious damage to the
transmission.

5
When trouble arises
295
5-2. Steps to take in an emergency
Scion_xB_OM_OM12G11U_(U)
*1: Driver’s seat belt buzzer:
The driver’s seat belt buzzer sounds to alert the driver that his or her seat
belt is not fastened. Once the engine switch is turned to the “ON” or
“START” position, the buzzer sounds for 5 seconds. If the vehicle reaches a
speed of 12 mph (20 km/h), the buzzer sounds intermittently for 10 seconds.
Then, if the seat belt is still unfastened, the buzzer will sound in a different
tone for 20 more seconds.
*2: Front passenger’s seat belt buzzer:The front passenger’s seat belt buzzer sounds to alert the front passenger
that his or her seat belt is not fastened. The buzzer sounds intermittently for
10 seconds after the vehicle reaches a speed of 12 mph (20 km/h). Then, if
the seat belt is still unfastened, the buzzer will sound in a different tone for
20 more seconds.
*3: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s ManualSupplement” for the maintenance interval applicable to your vehicle.
■ SRS warning light
This warning light system monitors the airbag sensor assembly, front airbag
sensors, side and curtain shield airbag sensors, curtain shield airbag sen-
sors, driver’s seat position sensor, driver’s seat belt buckle switch, front pas-
senger occupant classification system (ECU and sensors), “AIR BAG ON”
indicator light, “AIR BAG OFF” indicator light, front passenger’s seat belt
buckle switch, seat belt pretensioner assemblies, inflators, interconnecting
wiring and power sources. ( P. 69)

296 5-2. Steps to take in an emergency
Scion_xB_OM_OM12G11U_(U)
■Front passenger detection sensor, passenger seat belt reminder and
warning buzzer
● If luggage is placed on the front passenger seat, the front passenger
detection sensor may cause the warning light to flash and the warning
buzzer to sound even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passen-
ger, and the warning light may not operate properly.
■ If the malfunction indicator lamp comes on while driving
First check the following:
● Is the fuel tank empty?
If it is, fill the fuel tank immediately.
● Is the fuel tank cap loose?
If it is, tighten it securely.
The malfunction indicator lamp will go off after taking driving trips.
If the malfunction indicator lamp does not go off even after several trips, con-
tact your Scion dealer as soon as possible.
■
When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level.
Pushing the tire pressure warning reset switch will not turn off the tire
pressure warning light.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such
as natural air leaks and tire inflat ion pressure changes caused by tem-
perature. In this case, adjusting the tire inflation pressure will turn off the
warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped with a tire pressure warning
valve and transmitter. If a tire goes flat, the tire pressure warning light will
not turn off even though the flat tire has been replaced with the spare
tire. Replace the spare tire with the re paired tire and adjust the tire infla-
tion pressure. The tire pressure wa rning light will go off after a few min-
utes.