DAEWOO NUBIRA 2004 Service Repair Manual

9F – 2IAUDIO SYSTEMS
DAEWOO V–121 BL4
SCHEMATIC AND ROUTING DIAGRAMS
AUDIO SYSTEM CIRCUIT

AUDIO SYSTEMS 9F – 3
DAEWOO V–121 BL4
DIAGNOSIS
STEREO CASSETTE AM/FM RADIO
CD Player Inoperative, AM/FM Functions OK
StepActionValue(s)YesNo
1Using a good–quality CD, determine if the CD player
performs poorly or is inoperative.
Does the CD player function correctly?–Go to Step 2Go to Step 3
2Inform the customer that the problem is with the CD,
not the CD player.
Has the customer been informed?–System OK–
3Check the CD player for obstructions behind the
tape door.
Is an obstruction found?–Go to Step 4Go to Step 6
4Check to see if the obstruction can be removed.
Can the obstruction be removed?–Go to Step 5Go to Step 6
5Remove the obstruction.
Is the repair complete?–System OK–
6Replace the CD player.
Is the repair complete?–System OK–
AM/FM Cassette Radio Inoperative
StepActionValue(s)YesNo
1Check fuses F23 and F17.
Are fuses F23 and F17 blown?–Go to Step 2Go to Step 3
21. Check for a short circuit and repair it, if neces-
sary.
2. Replace the blown fuses.
Is the repair complete?–System OK–
31. Use a voltmeter to test for battery voltage at
fuse F23.
2. Turn the ignition ON and test for battery volt-
age at fuse F17.
Does the battery voltagematch the specified value at
fuses F23 and F17?11–14 vGo to Step 5Go to Step 4
4Repair the power supply circuit to the fuses.
Is the repair complete?–System OK–
51. Remove the cassette radio.
2. Turn the ignition ON.
3. Use a voltmeter to test for battery voltage at
the audio system connector terminals 4 and 5.
Does the battery voltage match the specified value
at both terminals?11–14 vGo to Step 7Go to Step 6
6Repair the open circuit between the audio system
connector and the fuse.
Is the repair complete?–System OK–
7Use an ohmmeter to test the ground circuit at the au-
dio system connector terminal 14.
Does the resistancematch the specified value?
0 WGo to Step 9Go to Step 8

9F – 4IAUDIO SYSTEMS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
8Repair the open ground circuit between the audio
system connector and ground G204.
Is the repair complete?–System OK–
9Replace the cassette radio.
Is the repair complete?–System OK–
Cassette Player Inoperative, AM/FM Functions OK
StepActionValue(s)YesNo
1Verify the customer complaint.
Does the cassette player destroy tapes?–Go to Step 5Go to Step 2
2Using a good–quality tape, determine whether the
cassette player performs poorly or is inoperative.
Does the cassette player perform poorly?–Go to Step 5Go to Step 3
3Check the cassette player for obstructions behind
the tape door.
Is an obstruction found?–Go to Step 4Go to Step 8
4Check to see if the obstruction can be removed us-
ing gentle force.
Is the obstruction removed?–Go to Step 5Go to Step 6
5Clean the cassette player head, the capstan, and the
drive system.
Does the tape play properly?–Go to Step 7Go to Step 6
6Replace the cassette radio.
Is the repair complete?–System OK–
7Check the cassette player for normal operation.
Is the repair complete?–System OK–
8Advise the owner of a defective or worn tape.
Is the repair complete?–System OK–
AM Does Not Work, FM and Cassette OK
StepActionValue(s)YesNo
1Check the audio system for normal operation.
Is AM inoperative and the rest of the system operat-
ing properly?–Go to Step 2System OK
2Replace the radio.
Is the repair complete?–System OK–

AUDIO SYSTEMS 9F – 5
DAEWOO V–121 BL4
FM Radio Does Not Work, AM and Cassette OK
StepActionValue(s)YesNo
11. Unplug the antenna cable from the antenna.
2. Connect the test antenna to the antenna cable.
3. Check the FM radio reception.
Is the FM radio operating properly?–Go to Step 2Go to Step 3
2Replace the antenna.
Is the repair complete?–System OK–
31. Remove the cassette radio from the instrument
panel.
2. Unplug the antenna cable from the audio sys-
tem.
3. Plug the test cable into the audio system.
4. Check the FM radio reception.
Is the FM radio operating properly?–Go to Step 4Go to Step 5
4Replace the antenna cable between the audio sys-
tem and the antenna.
Is the repair complete?–System OK–
5Replace the cassette radio.
Is the repair complete?–System OK–
SPEAKERS
Front Speakers Distorted or Inoperative, Rest of Audio System OK
StepActionValue(s)YesNo
11. Turn the ignition and the radio ON.
2. Check for distorted or inoperative front speak-
ers using the fader and the balance controls
with all of the sources (AM, FM, tape, CD).
Are the front speakers distorted?–Go to Step 2Go to Step 4
2Check the speaker and the door area for damage,
rattles, or vibration.
Is there anything loose or in the way of the speaker
causing the distortion?–Go to Step 3Go to Step 4
3Make the necessary repairs to secure the compo-
nent causing the distortion.
Is the repair complete?–System OK–
41. Remove the front speakers and disconnect the
speaker connector.
2. Using an ohmmeter, test the speaker wires for
a short to ground.
Does the ohmmeter show the specified value?Go to Step 6Go to Step 5
5Repair the short circuit between the front speaker
connector and the radio connector.
Is the repair complete?–System OK–
6Substitute a known good speaker for the speaker
causing the distortion.
Is the distortion eliminated?–Go to Step 7Go to Step 8

9F – 6IAUDIO SYSTEMS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
7Replace the speaker.
Is the repair complete?–System OK–
8Replace the cassette radio.
Is the repair complete?–System OK–
Rear Speakers Distorted or Inoperative, Rest of Audio System OK
StepActionValue(s)YesNo
11. Turn the ignition and the radio on.
2. Check for distorted or inoperative rear speak-
ers using the fader and the balance controls
with all the of the sources (AM, FM, tape, CD).
Are the rear speakers distorted?–Go to Step 2Go to Step 4
2Check the speakers, the rear deck, and the trunk
area for damage, rattles, or vibration.
Is there anything loose or in the way of the speaker
causing the distortion?–Go to Step 3Go to Step 4
3Make the necessary repairs to secure the compo-
nent causing the distortion.
Is the repair complete?–System OK–
41. Disconnect the rear speakers.
2. Using an ohmmeter, test the speaker wires for
a short to ground.
Does the ohmmeter show the specified value?Go to Step 6Go to Step 5
5Repair the short circuit between the rear speaker
connector and the radio connector.
Is the repair complete?–System OK–
6Substitute a known good speaker for the speaker
causing the distortion.
Is the distortion eliminated?–Go to Step 7Go to Step 8
7Replace the speaker.
Is the repair complete?–System OK–
8Replace the audio system.
Is the repair complete?–System OK–

AUDIO SYSTEMS 9F – 7
DAEWOO V–121 BL4
MAINTENANCE AND REPAIR
ON–VEHICLE SERVICE
STEREO CASSETTE AM/FM RADIO
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the center molding. Refer to Section 9E,
Instrumentation/Drive Information.
3. Remove the screws and the audio system.
4. Disconnect the audio system electrical connectors.
Installation Procedure
1. Connect the audio system electrical connectors.
Notice : Dissimilar metals in direct contact with each other
may corrode rapidly. Make sure to use the correct fasten-
ers to prevent premature corrosion.
2. Install the audio system with the screws.
Tighten
Tighten the audio system screws to 4 NSm (35 lb–in).
3. Install the center molding. Refer to Section 9E, In-
strumentation/Drive Information.
4. Connect the negative battery cable.
AUDIO REMOTE CONTROLLER
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the screws and the audio remote control-
ler.

9F – 8IAUDIO SYSTEMS
DAEWOO V–121 BL4
Installation Procedure
1. Install the audio remote controller with the screws.
2. Connect the negative battery cable.
NOTCHBACK CD CHANGER
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the CD changer electrical connector.
3. Remove the bolts and the CD changer.
Installation Procedure
1. Install the CD changer with the bolts.
2. Connect the CD changer electrical connector.
3. Connect the negative battery cable.
DOOR SPEAKERS
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the door trim panel. Refer to Section 9G,
Interior Trim.
3. Disconnect the electrical connector.
4. Remove the screws and the door speaker.

AUDIO SYSTEMS 9F – 9
DAEWOO V–121 BL4
Installation Procedure
Notice : Dissimilar metals in direct contact with each other
may corrode rapidly. Make sure to use the correct fasten-
ers to prevent premature corrosion.
1. Install the door speaker with the screws.
Tighten
Tighten the door speaker screws to 2 NSm (18 lb–in).
2. Connect the electrical connector.
3. Install the door trim panel. Refer to Section 9G, In-
terior Trim.
4. Connect the negative battery cable.
TWEETER SPEAKERS
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the tweeter speaker by prying the tweeter
speaker out of the door trim panel.
3. Disconnect the electrical connector.
Installation Procedure
1. Connect the electrical connector.
2. Install the tweeter speaker into the door trim panel.
3. Connect the negative battery cable.
GLASS ANTENNA MODULE
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the C–pillar trim panel. Refer to Section
9G, Interior Trim.
3. Disconnect the electrical connector.
4. Remove the screws and the glass antenna module.

9F – 10IAUDIO SYSTEMS
DAEWOO V–121 BL4
Installation Procedure
1. Install the glass antenna module with the screws.
2. Connect the electrical connectors.
3. Install the C–piller trim panel. Refer to Section 9G,
Interior Trim.
4. Connect the negative battery cable.
HATCHBACK WINDSHIELD
ANTENNA MODULE
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the A–pillar trim panel. Refer to Section
9G, Interior Trim.
3. Remove the sun visors with vanity mirror. Refer to
Section 9Q, Roof.
4. Remove the formed headliner. Refer to Section 9Q,
Roof.
5. Disconnect the electrical connector.
6. Remove the screws and the windshield antenna
module.
Installation Procedure
1. Install the windshield antenna module with screws.
2. Connect the electrical connector.
3. Install the formed head liner. Refer to Section 9Q,
Roof.
4. Install the sun visors with vanity mirror. Refer to
Section 9Q, Roof.
5. Install the A–Pillar trim panel. Refer to Section 9G,
Interior Trim.
6. Connect the negative battery cable.

AUDIO SYSTEMS 9F – 11
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM OPERATION
STEREO CASSETTE AM/FM RADIO
There are three audio systems offered. The stereo digital
logic cassette AM/FM radio with electronic tape ejection
is offered in standard and deluxe models. Both models
feature RDS (radio data system) which automatically se-
lects the best station within the chain of RDS stations cur-
rently being listened to. A trunk mounted CD changer is
also available.
AUDIO SCURITY SYSTEM
The audio security system is activated whenever the audio
system circuit is disconnected from the battery. A four–
digit security code must be entered in order for the audio
system to resume functioning. The security code is
stamped on a card located in the vehicle (usually in the
glove box). The following security code entering proce-
dure must be used to deactivate the audio security sys-
tem:
1. After connecting the audio security system to the
battery, ”CODE” will flash on the display.
2. Enter the proper security number into the unit, us-
ing the preset buttons No. 1 through 8.
3. For example, if the security number is ”1234”:
a. Press the preset button No. 1. ”CODE” will
disappear and ”1 – – – ” will appear on the dis-
play.
b. Press the preset button No. 2, and ”12 – – ”
will appear.
c. Press the preset button No. 3, and ”123– ” will
appear.
d. Press the preset button No. 4, and ”1234” will
appear and flash three times.4. The audio system will function and will transfer to
the radio.
If the incorrect security number is entered into the unit,
”Err” will appear followed by ”CODE” and there will be sev-
eral audible beeps. If this happens, repeat the security en-
tering procedure beginning with Step 2.
SPEAKERS
All audio systems use eight speakers, four speakers and
four tweeters mounted in each door.
TAPE PLAYER AND CASSETTE
CARE
The head and the capstan are the two parts of the tape
player that should be cleaned. This service should be per-
formed every 100 hours of cassette operation.
To clean the head and the capstan, use a cotton swab
dipped in rubbing alcohol.
A cassette cleaning kit may also be used to clean the head
and the capstan. Follow the cleaning kit instructions to
clean the tape player.
Do not touch the tape head with magnetized tools. If the
head becomes magnetized, it will degrade cassettes
played in the player. No service is performed on the cas-
settes. The cassette manufacturer handles warranties of
the cassettes. Store cassettes away from extreme heat
and direct sunlight.
COMPACT DISC CARE
Handle discs carefully. Store the discs in protective cases
away from the sun, heat, and dust. If the surface is soiled,
dampen a clean, soft cloth in a solution of mild neutral de-
tergent and wipe the disc clean.