Daewoo Nubira. Manual — part 172

GLASS AND MIRRORS 9L – 3

DAEWOO V–121 BL4

SCHEMATIC AND ROUTING DIAGRAMS

REAR WINDOW DEFOGGERDAER CIRCUIT

9L – 4

I

GLASS AND MIRRORS

DAEWOO V–121 BL4

ELECTRIC CONTROL OUTSIDE REARVIEW MIRRORS CIRCUIT

GLASS AND MIRRORS 9L – 5

DAEWOO V–121 BL4

DIAGNOSIS

TESTING REAR WINDOW
DEFOGGER GRID LINE

If it has been observed during use that a grid line is inop-
erative, the following procedure can be used to find the
break. If none of the grid lines is operating, a full system
diagnosis should be completed before attempting to repair
the grid lines.
1. Start the engine.
2. While the engine is running, turn on the rear win-

dow defogger.

3. From the inside of the vehicle, connect a voltmeter

to each end of a grid line. The voltmeter will indi-
cate battery voltage if the grid line is open.

Notice : Use care when touching the voltmeter terminals
a grid line. If the terminals are roughly applied, the grid line
may be scratched, resulting in an open circuit.

4. If a grid line is found to be open, move a voltmeter

terminal from one side of the grid line and re–test at
a point nearer to the other side of the window. Con-
tinue to re–test, each time bringing one of the volt-
meter terminals closer to the opposite side of the
window from where it was originally connected. The
break in the grid line is at the point where the volt-
meter begins reading 0 volts instead of battery volt-
age.

5. Use a marking crayon to mark lightly the break

point on the rear window. Mark the glass instead of
marking directly on the grid line, and make the
mark far enough from the grid line so that it can
easily be removed without disturbing the repair.

6. Use a grid line repair kit to fix the break in the grid

line. Refer to”Rear Window Defogger Grid Line Re-
pair” in this section.

OUTSIDE REARVIEW MIRROR DEFOGGERS

Step

Action

Value(s)

Yes

No

1

Check the rear window defogger.
Does the rear window defogger work?

Go to Step 4

Go to Step 2

2

Repair the rear window defogger before proceeding
with the outside mirror diagnosis.
Is the repair complete?

Go to Step 3

3

Test the outside mirror defoggers.
Does the repair of the rear window defogger system
also fix the problem with the outside mirror defog-
gers?

System OK

Go to Step 4

4

Check fuse EF27.
Is fuse EF27 blown?

Go to Step 5

Go to Step 6

5

1. Check for a short circuit and repair it, if neces-

sary.

2. Replace the fuse.

Is the repair complete?

System OK

6

1. On the side of the vehicle which has the mal-

functioning mirror defogger, remove the black
plastic escutcheon from the trim panel side of
the door.

2. Disconnect the outside mirror electrical con-

nector.

3. Turn the ignition ON.
4. Turn on the defogger.
5. Use a voltmeter to backprobe terminal 5 (ORN)

at the mirror electrical connector.

Does the voltmeter indicate the specified value?

11–14 v

Go to Step 8

Go to Step 7

7

Repair the open circuit between fuse EF27 and the
mirror connector.
Is the repair complete?

System OK

9L – 6

I

GLASS AND MIRRORS

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

8

1. Turn the ignition OFF.
2. Disconnect the outside mirror electrical con-

nector.

3. Use an ohmmeter to measure the resistance

between terminal 6 (BLK) of the mirror connec-
tor and ground.

Does the ohmmeter indicate the specified value?

[

0

W

Go to Step 10

Go to Step 9

9

Repair the open ground circuit for the outside rear-
view mirror.
Is the repair complete?

System OK

10

Replace the defective outside rearview mirror.
Is the repair complete?

System OK

ELECTRIC CONTROL OUTSIDE REARVIEW MIRRORS

Outside Rearview Mirrors Do Not Adjust

Step

Action

Value(s)

Yes

No

1

Check fuse EF32.
Is fuseEF32 blown?

Go to Step 2

Go to Step 3

2

1. Check for a short circuit and repair it, if neces-

sary.

2. Replace fuse EF32.

Is the repair complete?

System OK

3

Turn the ignitionON.
Check the voltage at fuse EF32.
Is the voltage at EF32 equal to the specified value?

11–14 v

Go to Step 5

Go to Step 4

4

Repair the open power supply circuit for fuse EF32.
Is the repair complete?

System OK

5

Check the power mirrors.
Are both power mirrors inoperative?

Go to Step 6

Go to Step 13

6

1. Remove the retaining screw for the door power

mirror and power window switch assembly.

2. Lift the switch assembly so the connectors on

the underside are visible.

Is the connector secured to the power mirror switch?

Go to Step 8

Go to Step 7

7

Connect the connector to the power mirror switch.
Is the repair complete?

System OK

8

Use an ohmmeter to check the continuity between
terminal 6 (BLK) of the mirror switch connector and
ground.
Does the ohmmeter indicate the specified value?

[

0

W

Go to Step 10

Go to Step 9

9

Repair the open ground circuit for the mirror switch.
Is the repair complete?

System OK

10

1. Turn the ignitionON.
2. Check the voltage at terminal 8 (PNK) of the

mirror switch connector.

Is the voltage equal to the specified value?

11–14 v

Go to Step 12

Go to Step 11

11

Repair the open power supply circuit for the mirror
switch.
Is the repair complete?

System OK