Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 671

LI-7

Turn Signal Light and Hazard Light System

LIGHTING SYSTEM

5. Turn Signal Light and Hazard

Light System

A: WIRING DIAGRAM

Refer to “Turn Signal Light and Hazard Light Sys-

tem” in WI section. <Ref. to WI-103, WIRING DIA-

GRAM, Turn Signal Light and Hazard Light

System.>

B: INSPECTION

1. TURN SIGNAL SWITCH

Measure the resistance between turn signal switch

terminals. <Ref. to LI-11, INSPECTION, Combina-

tion Switch (Light).>

2. HAZARD SWITCH

1) Measure the resistance between hazard switch

terminals.

2) If the result of the inspection is not at the stan-

dard value, replace the hazard switch.

3. TURN SIGNAL AND HAZARD MODULE

1) Connect the battery and turn signal light bulb to

the module. The module is properly functioning if it

blinks when power is supplied to the circuit.

2) Replace the turn signal & hazard module if it is

found defective.

C: NOTE

For operation procedures of each component of the

turn signal and hazard light system, refer to the re-

spective sections.

• Rear combination light assembly: <Ref. to LI-25,

Rear Combination Light Assembly.>

• Side turn signal light assembly: <Ref. to LI-24,

Side Turn Signal Light Assembly.>

• Front turn signal light bulb: <Ref. to LI-19, Front

Turn Signal Light Bulb.>

• Rear turn signal light bulb: <Ref. to LI-27, Rear

Turn Signal Light Bulb.>

• Combination switch (light): <Ref. to LI-11, Com-

bination Switch (Light).>

• Combination base switch: <Ref. to LI-14, Combi-

nation Base Switch Assembly.>

Switch position

Terminal No.

Specification

OFF

2 and 3

1 MΩ or more

ON

Less than 1 Ω

LI-00799

4 3 2 1

LI-00262

3

2 1

8 7 6 5 4

LI-8

Back-up Light System

LIGHTING SYSTEM

6. Back-up Light System

A: WIRING DIAGRAM

Refer to “Back-up Light System” in WI section.

<Ref. to WI-95, WIRING DIAGRAM, Back-up Light

System.>

B: INSPECTION

1. BACK-UP LIGHT SWITCH

1) Measure the resistance between back-up light

switch terminals.

2) Replace the back-up light switch if the inspection

result is not within the standard value.

C: NOTE

For operation procedures of each component of the

back-up light system, refer to the respective sec-

tion.

• Rear combination light assembly: <Ref. to LI-25,

Rear Combination Light Assembly.>

• Back-up light bulb: <Ref. to LI-30, Back-up Light

Bulb.>

Switch position

Terminal No.

Specification

When shift lever is

set in reverse

position

1 and 2

Less than 1 Ω

Other positions

1 MΩ or more

LI-00263

2 1

LI-9

Stop Light System

LIGHTING SYSTEM

7. Stop Light System

A: WIRING DIAGRAM

Refer to “Stop Light System” in WI section. <Ref. to

WI-96, WIRING DIAGRAM, Stop Light System.>

B: INSPECTION

1. STOP LIGHT SWITCH

1) Measure the resistance between stop light

switch terminals.

• 5 door model

• 4 door model

2) Replace the stop light switch if the inspection re-

sult is not within the standard value.

C: NOTE

For operation procedures of each component of the

stop light system, refer to the respective section.

• Rear combination light assembly: <Ref. to LI-25,

Rear Combination Light Assembly.>

• Tail light/stop light bulb: <Ref. to LI-26, Tail/Stop

Light Bulb.>

• High-mounted stop light: <Ref. to LI-32, High-

mounted Stop Light.>

Switch position

Terminal No.

Specification

When brake pedal

is depressed

5 door model:

1 and 2

4 door model:

3 and 4

Less than 1 Ω

When brake pedal

is released

1 MΩ or more

3

4

1

2

LI-00840

3

4

1

2

LI-00841

LI-10

Room Light System

LIGHTING SYSTEM

8. Room Light System

A: WIRING DIAGRAM

Refer to “Interior Light System” in WI section. <Ref.

to WI-106, WIRING DIAGRAM, Interior Light Sys-

tem.>

B: INSPECTION

1. DOOR SWITCH

1) Measure the resistance between door switch ter-

minals.

2) Replace the door switch if the inspection result is

not within the standard value.

2. REAR GATE LATCH SWITCH

1) Measure the resistance between rear gate latch

switch terminals.

2) If the inspection result is not within the standard

value, replace the rear gate latch and actuator as-

sembly.

3. TRUNK LID LATCH SWITCH

1) Measure the resistance between trunk lid latch

switch terminals.

2) If the inspection result is not within the standard

value, replace the trunk lid latch and actuator as-

sembly.

C: NOTE

For operation procedures of each component of the

room light system, refer to the respective section.

• Spot map light: <Ref. to LI-33, Spot Map Light.>

• Room light: <Ref. to LI-34, Room Light.>

• Luggage room light: <Ref. to LI-35, Luggage

Room Light.>

• Trunk room light: <Ref. to LI-36, Trunk Room

Light.>

• Door switch: <Ref. to LI-41, Door Switch.>

• Ignition switch illumination: <Ref. to LI-37, Igni-

tion Switch Illumination.>

Switch position

Terminal No.

Specification

When door is

opened

1 and 3

Less than 1 Ω

When door is

closed

1 MΩ or more

Switch position

Terminal No.

Standard value

When rear gate is

opened

3 and 4

Less than 1 Ω

When rear gate is

closed

1 MΩ or more

1

2

3

LI-00007

LI-00947

4 3 2 1

Switch position

Terminal No.

Standard value

When trunk lid is

opened

1 and 3

Less than 1 Ω

When trunk lid is

closed

1 MΩ or more

LI-00277

1

2

3