Scion tC. Service Manual - part 22

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Use the following types of lithium battery

Vehicles without a smart key system (type A): CR2016
Vehicles without a smart key system (type B): CR1620
Vehicles with a smart key system: CR1632

●

Batteries can be purchased at your Scion dealer, local electrical appli-
ance shops or camera stores.

●

Replace only with the same or equivalent type recommended by the
manufacturer.

●

Dispose of used batteries according to the local laws.

■

If the key battery is depleted

The following symptoms may occur:

●

The smart key system (if equipped) and wireless remote control will not
function properly.

●

The operational range will be reduced.

CAUTION

■

Removed battery and other parts

These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. Failure to do so could result in death or serious
injury.

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NOTICE

■

For normal operation after replacing the battery

Observe the following precautions to prevent accidents:

●

Always work with dry hands.
Moisture may cause the battery to rust.

●

Do not touch or move any other component inside the remote control.

●

Do not bend either of the battery terminals.

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Checking and replacing fuses

If any of the electrical components do not operate, a fuse may have

blown. If this happens, check and replace the fuses as necessary.

Vehicles without a smart key system
Turn the engine switch to the “LOCK” position.
Vehicles with a smart key system
Turn the “ENGINE START STOP” switch off.

Open the fuse box cover.

Engine compartment

Push the tab in and lift the lid
off.

Under the driver’s side instrument panel

Remove the lid.

STEP 

1 

STEP 

2 

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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. 344) for details about which fuse to check.

Remove the fuse.

Only type A fuses 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 

1

2

ITY42C012

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Fuse layout and amperage ratings

■

Engine compartment

Fuse

Ampere

Circuit

1

FAN NO.2

30 A

Electric cooling fan

2

FAN NO.1

40 A

Electric cooling fan

3

ABS NO.2

30 A

ABS, VSC

4

ABS NO.1

50 A

ABS, VSC

5

HTR

50 A

Air conditioning system

6

ALT

120 A

Charging system

7

EPS

80 A

Electric power steering system

8

P/I-B

50 A

EFI NO.1, EFI NO.2, 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, headlights

10

SPARE

10 A

Spare fuse

11

SPARE

20 A

Spare fuse

12

SPARE

30 A

Spare fuse

13

H-LP LH-HI

10 A

Left hand headlight (high beam)

14

H-LP RH-HI

10 A

Right hand headlight (high beam), 
gauges and meters

15

H-LP RH-LO

10 A

Right hand headlight (low beam), 
gauges and meters

16

H-LP LH-LO

10 A

Left hand headlight (low beam)

17

ETCS

10 A

Multiport fuel injection system/
sequential multiport fuel injection 
system

18

HAZ

10 A

Turn signal lights, emergency 
flashers, gauges and meters

19

ALT-S

7.5 A

Charging system

20

AM2 NO.2

*

7.5 A

Power management system

21

AM2

30 A

IG2 NO.2, starting system

22

STRG LOCK

*

20 A

Steering lock system

23

AMP

30 A

Audio system

24

MIR HTR

10 A

Outside rear view mirror defoggers, 
multiport fuel injection system/
sequential multiport fuel injection 
system

Fuse

Ampere

Circuit

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25

ECU-B NO.2

10 A

Automatic transmission, power 
windows, clock, smart key system, 
wireless remote control, front pas-
senger occupant classification sys-
tem

26

ECU-B

10 A

Body ECU, gauges and meters, 
steering sensor, wireless remote 
control, smart key system

27

RAD NO.1

15 A

Audio system

28

DOME

10 A

Interior light, luggage compartment 
light

29

STOP

10 A

Multiport fuel injection system/
sequential multiport fuel injection 
system, ABS, VSC, automatic 
transmission, shift lock system, 
stop lights, high mounted stoplight, 
power management system

30

DOOR

20 A

Power windows

Fuse

Ampere

Circuit

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*

: Vehicles with a smart key system only

31

DEF

40 A

MIR HTR, rear window defoggers

32

EFI NO.2

15 A

Multiport fuel injection system/
sequential multiport fuel injection 
system, fuel pump

33

EFI NO.1

15 A

Multiport fuel injection system/
sequential multiport fuel injection 
system, automatic transmission

34

HORN

10 A

Horn

35

IG2

15 A

MET, IGN, Multiport fuel injection 
system/sequential multiport fuel 
injection system

Fuse

Ampere

Circuit

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Under the driver’s side instrument panel

Fuse

Ampere

Circuit

1

S/ROOF

30 A

Moon roof

2

FOG FR

15 A

No circuit

3

FOG RR

7.5 A

No circuit

4

AM1

5 A

Starting system, body ECU

5

OBD

7.5 A

On-board diagnosis system

6

D/L

20 A

Power door lock system

7

DOOR FR

20 A

Power windows

8

WASHER RR

7.5 A

Rear window washer

9

WASHER FR

10 A

Windshield washer 

10

WIP RR

15 A

Rear window wiper

11

WIP FR

30 A

Windshield wipers

12

PWR OUTLET

15 A

Power outlet

13

ECU-IG1 NO.1

5 A

Electric power steering, shift lock 
system, moon roof, tire pressure 
warning system, charging system, 
paddle shift switches

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14

ACC

5 A

Body ECU, clock, outside rear view 
mirror, shift lock system, audio sys-
tem

15

IG

5 A

Rear window defoggers, electric 
cooling fan, multiport fuel injection 
system/sequential multiport fuel 
injection system

16

TAIL

10 A

Parking lights, tail lights, accessory 
lights, side marker lights, license 
plate lights, multiport fuel injection 
system/sequential multiport fuel 
injection system

17

IGN

7.5 A

Multiport fuel injection system/
sequential multiport fuel injection 
system, automatic transmission, 
clock, smart key system, steering 
lock system, SRS airbag system, 
fuel pump, front passenger occu-
pant classification system

18

PANEL

5 A

Gauges and meters, air condition-
ing system, seat heater, VSC OFF 
switch, shift lever illumination, 
steering switch, clock, audio sys-
tem

19

S/HTR FL

10 A

Seat heater (driver’s side)

20

MET

7.5 A

Gauges and meters

Fuse

Ampere

Circuit

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Driver’s side instrument panel

21

S/HTR FR

10 A

Seat heater (front passenger’s 
side)

22

IG2 NO.2

7.5 A

Starting system

23

BKUP LP

7.5 A

Back-up light, automatic transmis-
sion, multiport fuel injection sys-
tem/sequential multiport fuel 
injection system

24

ECU-IG1 NO.2

5 A

Body ECU, ABS, VSC, steering 
sensor

25

ECU-IG1 NO.3

5 A

Turn signal lights, emergency 
flashers

26

HTR-IG

7.5 A

Air conditioning system

Fuse

Ampere

Circuit

1

DOOR FL

30 A

Power windows

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. 352)

●

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 by 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. 440)

■

Front bulb locations

Front side marker lights

Headlight high/low beams

Daytime running lights 

(Canada only) and 

front turn signal lights

Parking lights

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Rear bulb locations

Tail lights and 

rear side marker 

lights 

Rear turn signal lights

Back-up lights

License

plate lights

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Replacing light bulbs

■

Headlight high/low beams

For easy access to the light
bulbs, remove the securing clip
and turn and pull off the washer
fluid filler opener.

Turn the bulb base counterclock-
wise.

Unplug the bulb while depress-
ing the lock release.

STEP 

1 

STEP 

2 

STEP 

3