Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 700

GW-33

Rear Window Defogger System

GLASS/WINDOWS/MIRRORS

16.Rear Window Defogger Sys-

tem

A: WIRING DIAGRAM

Refer to “Rear Defogger System” in the wiring dia-

gram. <Ref. to WI-135, WIRING DIAGRAM, Rear

Defogger System.>

B: INSPECTION

1. SYSTEM INSPECTION

NOTE:

Rear window defogger system can be customized

on the Subaru Select Monitor, when the body inte-

grated unit customize setting {A/C ECM setting} is

“support”.

2. CHECK WITH SUBARU SELECT MONI-

TOR

CAUTION:

Check whether the “Rr defogger op. mode” set-

ting is in initial setting or customize setting be-

fore performing inspection.

1) Check the input signal when the rear window de-

fogger switch is operated using Subaru Select

Monitor.

(1) Prepare the Subaru Select Monitor. <Ref. to

GW-7, PREPARATION TOOL, General De-

scription.>

(2) Turn the ignition switch to ON (engine OFF)

and run the “PC application for Subaru Select

Monitor”.

(3) On «System Selection Menu» display, se-

lect {Integ. unit mode}.

(4) Select the {Rr defogger output} on {Current

Data Display & Save}.

(5) Check the displayed data (ON/OFF) by op-

erating the rear window defogger switch.

2) Check the operation with rear window defogger

switch ON.

• When customize setting is set as “Continuous”, it

is normal if the 15-minute operation and 2-minute

stop repeats.

• When customize setting is “Normal”, it is normal

if the operation lasts for 15 minutes and then turns

OFF.

3) When the operation in 2) above fails, replace the

body integrated unit.

3. HEAT WIRE INSPECTION

CAUTION:

When wiping off the stain on glass with cloth,

use a dry and soft cloth and move it in the direc-

tion of the heat wire extension to avoid damage

to the heat wire.

1) Prepare the following checking items.

• Liquid crystal thermograph sheet (approximate

size: 300 × 300 mm (11.8 × 11.8 in) and thermal

temperature: 35 — 40°C (95 — 104°F))

• Aluminum foil

2) Turn the ignition switch to ON.

3) Turn the defogger switch to ON.

4) Push the liquid crystal thermograph sheet from

the outside of the rear glass.

NOTE:

Use the liquid crystal thermograph sheet every

range it is separated with the separate line.

5) Determine the faulty heat wire by checking the

color of the liquid crystal thermograph sheet.

NOTE:

• Check from the inside of the glass if the liquid

crystal thermograph sheet does not change.

• The time for the color change may differ depends

on the surface temperature of the glass.

Symptom

Repair order

Rear window defog-
ger does not operate.

1. Check the fuse.
2. Check the rear defogger relay.
3. Check the rear defogger switch.
4. Check the heat wire.
5. Check the wiring harness.
6. Check body integrated unit.

System name

Initial setting

Customize setting

Rr defogger op.
mode

OFF after 15 min.

Repeat 15 min. oper-
ation and 2 min.
stop.

(A) Liquid crystal thermograph sheet
(B) Separate line

Liquid crystal thermograph sheet

Criteria

Change occurred (red → blue)

Normal

No change (black)

Open

(A)

(B)

GW-00756

GW-34

Rear Window Defogger System

GLASS/WINDOWS/MIRRORS

6) Wrap a piece of aluminum foil around the tip of

tester probe and press it against the heat wire with

your finger.

7) To both ends of the section that has been found

to include an open in the step 5), apply the tester

positive (+) probe and the negative (–) probe.

8) Move the tester probe on the negative (–) side

slowly along the heat wire. If voltage changes from

zero to several volts during movement of tester

probe, heat wire is open at the voltage change

point.

9) Repair the heat wire that determines the place of

the open circuit. <Ref. to GW-34, REPAIR, Rear

Window Defogger System.>

C: REPAIR

1) Clean the broken portion with alcohol or white

gasoline.

2) Mask both side of wire with masking tape.

3) Apply the conductive silver composition to the

broken portion.
Conductive silver composition:

Permatex’s

QUICK GRID

4) Dry using a dryer after applying the composition.

5) After repair, check the wire.

(A) Tester probe
(B) Aluminum foil

(C) Heat wire

ET-00007

(B)

(C)

(A)

ET-00333

(1) Broken portion
(2) Masking tape
(3) Broken wire
(4) Conductive silver composition

GW-00078

(2)

(3)

(4)

(1)

GW-35

Rear Quarter Glass

GLASS/WINDOWS/MIRRORS

17.Rear Quarter Glass

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Remove the rear quarter trim.

• 5 door model: <Ref. to EI-60, 5 DOOR MODEL,

REMOVAL, Rear Quarter Trim.>

• 4 door model: <Ref. to EI-61, 4 DOOR MODEL,

REMOVAL, Rear Quarter Trim.>

3) Remove the rear quarter glass in the same pro-

cedure as for windshield glass. <Ref. to GW-23,

REMOVAL, Windshield Glass.>

B: INSTALLATION

1. 5 DOOR MODEL

1) Mount the fastener on the vehicle body.

2) Apply the primer to the glass and body sides in

the same procedure as for windshield glass. <Ref.

to GW-24, INSTALLATION, Windshield Glass.>
CAUTION:

Do not allow the primer to come in contact with

the molding during the application of the prim-

er.

3) Fabricate the cartridge nozzle tip as shown and

set the sealant gun with the adhesive.

4) Apply adhesive with the dam rubber installed in

the same procedure as for windshield glass. <Ref.

to GW-24, INSTALLATION, Windshield Glass.>

(1) 10 mm (0.39 in)
(2) 8 mm (0.31 in)

GW-00494

(1)

(2)

(2)

60

(1) Glass
(2) Adhesive
(3) Dam rubber
(4) Molding
(5) Fastener
(6) Clip
(7) 66 mm (2.60 in)
(8) 17 mm (0.61 in)

GW-01368

(2)

(3)

(1)

(4)

A

A

C

A

B

(5)

C

A

B

(3)

(6)

(3)

(4)

(1)

(7)

(8)

(2)

(6)

(3)

(3)

GW-36

Rear Quarter Glass

GLASS/WINDOWS/MIRRORS

5) Insert the glass locating pin into the hole on side

panel and push on the area around the locating pin

to secure it.

Then push lightly all around the locating pin to seal

it.

6) After completion of all work, allow the vehicle to

stand for about 24 hours.
NOTE:

• When door is opened/closed after glass is bond-

ed, always lower the door glass first, and then

open/close it carefully.

• Move the vehicle slowly.

• For minimum drying time and vehicle standing

time before driving after bonding, follow instruc-

tions or instruction manual from the adhesive man-

ufacturer.

7) After curing of adhesive, pour the water on exter-

nal surface of vehicle to check that there are no wa-

ter leaks.
NOTE:

When a vehicle is returned to the user, tell him or

her that the vehicle should not be subjected to

heavy impact for at least three days.

8) Install the rear quarter trim. <Ref. to EI-61, IN-

STALLATION, Rear Quarter Trim.>

2. 4 DOOR MODEL

1) Mount the fastener on the vehicle body.

2) Apply the primer to the glass and body sides in

the same procedure as for windshield glass. <Ref.

to GW-24, INSTALLATION, Windshield Glass.>

3) Fabricate the cartridge nozzle tip as shown and

set the sealant gun with the adhesive.

4) Apply adhesive with the dam rubber installed in

the same procedure as for windshield glass. <Ref.

to GW-24, INSTALLATION, Windshield Glass.>

A Upper end
B Lower end

C Front end

(1) Glass
(2) Adhesive
(3) Molding
(4) Dam rubber

B

A

C

(4)

9 mm (0.35 in)2 mm

(0.08 in)

8 mm (0.31 in)

12 mm (0.47 in)

(2)

(1)

GW-01369

4 mm

(0.16 in)

9 mm (0.35 in)

2 mm

(0.08 in)

8 mm

(0.31 in)

13 mm

(0.51 in)

(2)

(1)

(4)

18 mm

(0.71 in)

5 mm

(0.2 in)

(4)

9 mm (0.35 in)

2 mm

(0.08 in)

(3)

8 mm (0.31 in) (1)

24.2 mm

(0.95 in)

(2)

26.7 mm

(1.05 in)

(4)

(4)

1.5 mm

(0.06 in)

(1) 10 mm (0.39 in)
(2) 8 mm (0.31 in)

(1) Glass
(2) Adhesive
(3) Dam rubber
(4) Molding
(5) Fastener

GW-00494

(1)

(2)

(2)

60

GW-00807

(4)

C

C

B

B

A

A

(2)

(5)

(1)

(3)

(3)

(3)