ground DAEWOO LACETTI 2004 Service Repair Manual

INSTRUMENTATION/DRIVER INFORMATION 9E – 11
DAEWOO V–121 BL4
TEMPERATURE GAUGE
Temperature Gauge Inoperative, Other Gauges and Warning
Lamps are OK
StepActionValue(s)YesNo
1Allow the engine to cool to room temperature.
With the ignition ON, does the temperature gauge al-
ways read at the high end of the scale?–Go to Step 7Go to Step 2
2Disconnect ECM electrical connector.
Does the temperature gauge indicator drop to the
low end of the scale?–Go to
Section 1F, En-
gine ControlsGo to Step 3
3Check for a short to ground between the ECM and
the temperature gauge.
Is there a short to ground?–Go to Step 4Go to Step 5
4Repair the short to ground.
Is the repair complete?–System OK–
5Replace the temperature gauge.
Is the repair complete?–System OK–
61. Disconnect the ECM.
2. Turn the ignition ON.
3. Check the voltage at the ECM.
Does the the voltage equal the value specified?11–14 vGo to Step 9Go to Step 7
7Check for an open circuit between the ECM and the
temperature gauge.
Is there an open circuit?–Go to Step 8Go to Step 5
8Repair the open circuit between the ECM and the
temperature gauge.
Is the repair complete?–System OK–
91. Disconnect the ECM.
2. Connect a jumper wire between the ECM con-
nector and ground.
3. Turn the ignition ON.
Does the temperature gauge move to the high end
of the scale?–Go to
Section 1F, En-
gine ControlsGo to Step 5

9E – 14IINSTRUMENTATION/DRIVER INFORMATION
DAEWOO V–121 BL4
CHIME MODULE
Seat Belt Warning Chime Inoperative
StepActionValue(s)YesNo
1Check the chime module connector to make sure it
is connected properly.
Is the connector disconnected or partially discon-
nected?–Go to Step 2Go to Step 3
2Connect the electrical connector for the chime mod-
ule.
Is the repair complete?–System OK–
3Check fuse F4.
Is fuse F4 blown?–Go to Step 4Go to Step 5
41. Check for a short circuit and repair it, if neces-
sary.
2. Replace the fuse.
Is the repair complete?–System OK–
51. Turn the ignition ON.
2. Check the voltage at fuse F4.
Is the specified voltage available at fuse F4?11–14 vGo to Step 7Go to Step 6
6Repair the power supply circuit for fuse F4.
Is the repair complete?–System OK–
71. Disconnect the chime module.
2. Turn the ignition ON.
3. Check the voltage at terminal 8 of the chime
module connector.
Does the voltage equal the specified value?11–14 vGo to Step 9Go to Step 8
8Repair the open circuit between fuse F4 and the
chime module connector.
Is the repair complete?–System OK–
9With the chime module disconnected, use an ohm-
meter to check continuity between terminal 5 of the
chime module connector and ground.
Does the ohmmeter indicate the specified value?
0 WGo to Step 11Go to Step 10
10Repair the open circuit between terminal 5 of the
chime module connector and ground.
Is the repair complete?–System OK–
111. Disconnect the chime module connector.
2. Make sure the driver’s side seat belt is unfas-
tened.
3. Use an ohmmeter to check the continuity be-
tween terminal 1 of the chime module and
ground.
Does the ohmmeter indicate the specified value?
0 WGo to Step 12Go to Step 13
12Replace the chime module.
Is the repair complete?–System OK–

INSTRUMENTATION/DRIVER INFORMATION 9E – 15
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
131. Disconnect the seat belt switch.
2. Make sure the driver’s side seat belt is unfas-
tened.
3. Use an ohmmeter to check the continuity of the
switch.
Does the ohmmeter indicate the specified value?
0 ΩGo to Step 15Go to Step 14
14Replace the seat belt switch.
Is the repair complete?–System OK–
15Use an ohmmeter to check the continuity of the wire
between terminal 1 of the chime module and the seat
belt switch.
Does the ohmmeter indicate the specified value?
0 WGo to Step 17Go to Step 16
16Repair the open circuit between terminal 1 of the
chime module and the seat belt switch.
Is the repair complete?–System OK–
17Repair the open circuit between the seat belt switch
connector and ground.
Is the repair complete?–System OK–
Door–Open Warning Chime Inoperative
StepActionValue(s)YesNo
1Check the chime module connector to make sure it
is connected properly.
Is the connector disconnected or partially discon-
nected?–Go to Step 2Go to Step 3
2Connect the electrical connector for the chime mod-
ule.
Is the repair complete?–System OK–
3Check fuse F4.
Is fuse F4 blown?–Go to Step 4Go to Step 5
41. Check for a short circuit and repair it, if neces-
sary.
2. Replace the fuse.
Is the repair complete?–System OK–
51. Turn the ignition ON.
2. Check the voltage at fuse F4.
Is the specified voltage available at fuse F4?11–14 vGo to Step 7Go to Step 6
6Repair the power supply circuit for fuse F4.
Is the repair complete?–System OK–
71. Disconnect the chime module.
2. Turn the ignition ON.
3. Check the voltage at terminal 8 of the chime
module connector.
Does the voltage equal the specified value?11–14 vGo to Step 9Go to Step 8
8Repair the open circuit between fuse F4 and the
chime module connector.
Is the repair complete?–System OK–

9E – 16IINSTRUMENTATION/DRIVER INFORMATION
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
9With the chime module disconnected, use an ohm-
meter to check the continuity between terminal 5 of
the chime module connector and ground.
Does the ohmmeter indicate the specified value?
0 WGo to Step 11Go to Step 10
10Repair the open circuit between terminal 5 of the
chime module connector and ground.
Is the repair complete?–System OK–
111. Disconnect the chime module connector.
2. Make sure the driver’s side door is open.
3. Use an ohmmeter to check the continuity be-
tween terminal 4 of the chime module and
ground.
Does the ohmmeter indicate the specified value?
0 WGo to Step 12Go to Step 13
12Replace the chime module.
Is the repair complete?–System OK–
131. Disconnect the front door contact switch.
2. Use an ohmmeter to check the continuity be-
tween the door contact switch and terminal 4 of
the chime module.
Does the ohmmeter indicate the specified value?
0 WGo to Step 15Go to Step 14
14Repair the open circuit between the door contact
switch and terminal 4 of the chime module.–System OK–
15Replace the door contact switch.
Is the repair complete?–System OK–
Key Reminder Chime Inoperative
StepActionValue(s)YesNo
1Check the chime module connector to make sure it
is connected properly.
Is the connector disconnected or partially discon-
nected?–Go to Step 2Go to Step 3
2Connect the electrical connector for the chime mod-
ule.
Is the repair complete?–System OK–
3Check fuse Ef19.
Is fuse Ef19 blown?–Go to Step 4Go to Step 5
41. Check for a short circuit and repair it, if neces-
sary.
2. Replace the fuse.
Is the repair complete?–System OK–
51. Turn the ignition ON.
2. Check the voltage at fuse Ef19.
Is the specified voltage available at fuse Ef19?11–14 vGo to Step 7Go to Step 6
6Repair the power supply circuit for fuse Ef19.
Is the repair complete?–System OK–
71. Disconnect the chime module.
2. Check the voltage at terminal 2 of the chime
module connector.
Does the voltage equal the specified value?11–14 vGo to Step 13Go to Step 8

INSTRUMENTATION/DRIVER INFORMATION 9E – 17
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
81. Disconnect the key reminder switch.
2. Use an ohmmeter to check the continuity be-
tween the key reminder switch and fuse Ef19.
Does the ohmmeter indicate the specified value?
0 WGo to Step 10Go to Step 9
9Repair the open circuit between the key reminder
switch and fuse Ef19.–System OK–
10With the key reminder switch and the chime module
disconnected, check the continuity between the key
reminder switch and terminal 2 of the chime module
connector .
Does the ohmmeter indicate the specified value?
0 WGo to Step 12Go to Step 11
11Repair the open circuit between the key reminder
switch and terminal 2 of the chime module connec-
tor.–System OK–
12Replace the key reminder switch.
Is the repair complete?–System OK–
13With the chime module disconnected, use an ohm-
meter to check continuity between terminal 5 of the
chime module connector and ground.
Does the ohmmeter indicate the specified value?
0 WGo to Step 15Go to Step 14
14Repair the open circuit between terminal 5 of the
chime module connector and ground.
Is the repair complete?–System OK–
15Replace the chime module.
Is the repair complete?–System OK–

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–

9L – 6IGLASS AND MIRRORS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
81. Turn the ignition OFF.
2. Disconnect the outside rearview mirror electri-
cal connector.
3. Use an ohmmeter to measure the resistance
between terminal 8 (BLK) of the outside rear-
view mirror connector and ground.
Does the ohmmeter indicate the specified value?
0 ΩGo to Step 10 Go to Step 9
9Repair the open ground circuit for the outside rear-
view mirror.
Is the repair complete?–System OK–
10Replace the defective outside rearview mirror.
Is the repair complete?–System OK–
ELECTRIC CONTROL OUTSIDE REARVIEW MIRRORS
Electric Control Outside Rearview Mirrors Do Not Adjust
StepActionValue(s)YesNo
1Check fuse F8.
Is fuse F8 blown?–Go to Step 2 Go to Step 3
21. Check for a short circuit and repair it, if neces-
sary.
2. Replace fuse F8.
Is the repair complete?–System OK–
31. Turn the ignition ON.
2. Check the voltage at fuse F8.
Is the voltage at F8 equal to the specified value?11–14 vGo to Step 5 Go to Step 4
4Repair the open power supply circuit for fuse F8.
Is the repair complete?–System OK–
5Check the electric control outside rearview mirrors.
Are both electric control outside rearview mirrors in-
operative?–Go to Step 6 Go to Step 13
61. Remove the retaining screw for the electric
control outside rearview mirror and power win-
dow switch assembly.
2. Lift the switch assembly so that the connectors
on the underside are visible.
Is the connector secured to the electric control out-
side rearview mirror switch?–Go to Step 8 Go to Step 7
7Connect the connector to the electric control outside
rearview mirror switch.
Is the repair complete?–System OK–
8Use an ohmmeter to check the continuity between
terminal 6 (BLK) of the electric control outside rear-
view mirror switch connector and ground.
Does the ohmmeter indicate the specified value?
0 ΩGo to Step 10 Go to Step 9
9Repair the open ground circuit for the electric control
outside rearview mirror switch.
Is the repair complete?–System OK–