Scion xB. Service Manual - part 17

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Driver’s side instrument panel

Remove the instrument panel.

After a system failure, see “Fuse layout and amperage rat-
ings” (

P. 261) for details about which fuse to check.

Remove the fuse.

Only type A fuse can be
removed using the pullout
tool.

STEP 

3 

STEP 

4 

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Check if the fuse is blown.

Type A

Normal fuse

Blown fuse

Replace the blown fuse with a
new fuse of an appropriate
amperage rating. The amper-
age rating can be found on the
fuse box lid.

Type B

Normal fuse

Blown fuse

Replace the blown fuse with a
new fuse of an appropriate
amperage rating. The amper-
age rating can be found on the
fuse box lid.

Type C

Normal fuse

Blown fuse

Contact your Scion dealer.

STEP 

5 

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Fuse layout and amperage ratings

■

Engine compartment

Fuse

Ampere

Circuit

1

CDS FAN

30 A

Electric cooling fan

2

RAD FAN

40 A

Electric cooling fan

3

ABS NO.3

30 A

Anti-lock brake system, vehicle sta-
bility control system

4

ABS NO.1

50 A

Anti-lock brake system, vehicle sta-
bility control system

5

HTR

50 A

Air conditioning system

6

ALT

120 A

RDI FAN, CDS FAN, ABS NO.1, 
ABS NO.3, HTR, AM1, DOOR, 
STOP, FR DOOR, POWER, RR 
DOOR, RL DOOR, OBD, ACC-B, 
DEF, TAIL, PANEL

7

EPS

60 A

Electric power steering system

8

P/I

50 A

EFI MAIN, HORN, IG2

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9

H-LP MAIN

50 A

H-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

Fuse

Ampere

Circuit

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25

IG2

15 A

IGN, METER, IG2 NO.2

26

IG2 NO.2

7.5 A

Starting system

27

EFI NO.2

10 A

Air conditioning system, rear O2 
sensor, front air flow sensor

28

EFI NO.1

10 A

Multiport fuel injection system/ 
sequential multiport fuel injection 
system, air flow meter

29

H-LP RH HI

10 A

Right hand headlight (high beam)

30

H-LP LH HI

10 A

Left hand headlight (high beam)

31

H-LP RH LO

15 A

Right hand headlight (low beam)

32

H-LP LH LO

15 A

Left hand headlight (low beam)

Fuse

Ampere

Circuit

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■

Under the driver’s side instrument panel

Fuse

Ampere

Circuit

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

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9

MIR HTR

10 A

Multiport fuel injection system/ 
sequential multiport fuel injection 
system, outside rear view mirror 
defoggers

10

IGN

7.5 A

Multiport 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

Fuse

Ampere

Circuit

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Driver’s side instrument panel

18

OBD

7.5 A

On-board diagnosis system

19

STOP

10 A

Stop 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 A

Starting system, shift lock control 
system

Fuse

Ampere

Circuit

1

POWER

30 A

Power windows

2

DEF

30 A

Rear window defogger, MIR HTR

3

PWR SEAT

30 A

No circuit

Fuse

Ampere

Circuit

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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. 268)

●

If the replaced fuse blows again, have the vehicle inspected by your
Scion dealer.

■

If there is an overload in the circuits

The fuses are designed to blow, protecting the wiring harness from damage.

CAUTION

■

To prevent system breakdowns and vehicle fire

Observe the following precautions.
Failing to do so may cause damage to the vehicle, and possibly a fire or
injury.

●

Never use a fuse of a higher amperage rating than that indicated, or use
any other object in place of a fuse.

●

Always use a genuine Scion fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.

●

Do not modify the fuse or the fuse box.

NOTICE

■

Before replacing fuses

Have the cause of electrical overload determined and repaired by your Scion
dealer, as soon as possible.

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Light bulbs

You may replace the following bulbs yourself. The difficulty level of

replacement varies depending on the bulb. If necessary bulb

replacement seems difficult to perform, contact your Scion dealer.

For more information about replacing other light bulbs, contact your

Scion dealer.

■

Preparing for light bulb replacement

Check the wattage of the light bulb to be replaced. (

P. 341)

■

Front bulb locations

Parking light

Daytime running lights

(if equipped) and head-

light high beam

Headlight low beam 

Front side 

marker light

Front turn signal light

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Rear bulb locations

Stop/tail and rear side marker light 

License plate 

lights

Rear turn signal light

Back-up light

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Replacing light bulbs

■

Headlight low beams

Turn the bulb base counterclock-
wise.

Unplug the bulb while depress-
ing the lock release.

STEP 

1 

STEP 

2 

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Daytime running lights (if equipped) and headlight high
beams

Turn the bulb base counterclock-
wise.

Unplug the bulb while depress-
ing the lock release.

STEP 

1 

STEP 

2 

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Front turn signal lights

Turn the bulb base counterclock-
wise.

Remove the light bulb.

STEP 

1 

STEP 

2 

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Parking lights

Turn the bulb base counterclock-
wise.

Remove the light bulb.

STEP 

1 

STEP 

2 

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Front side marker lights

Turn the bulb base counterclock-
wise.

Remove the light bulb.

STEP 

1 

STEP 

2