9F – 6IAUDIO SYSTEMS
DAEWOO V–121 BL4
Step NoYesValue(s)Action
5 Repair the short circuit between the rear speaker
connector and the radio connector.
Is the repair complete?
System OK
6 Substitute a known good speaker for the speaker
causing the distortion.
Is the distortion eliminated?
Go to Step 7 Go to Step 8
7 Replace the speaker.
Is the repair complete?
System OK
8 Replace the radio.
Is the repair complete?
System OK
ANTENNA
Power Antenna Does Not Work
Step Action Value(s) Yes No
1 Check fuse EF29.
Is fuse EF29 blown?
Go to Step 2 Go to Step 3
2
1. Check for a short circuit and repair if neces-
sary.
2. Replace the blown fuse.
Is the repair complete?
System OK
3 Use a voltmeter to test for battery voltage at fuse
EF29.
Does the battery voltage match the specified value?
11–14 v Go to Step 5 Go to Step 4
4 Repair the open power supply circuit to fuse EF29.
Is the repair complete?
System OK
5 Use a voltmeter to test for battery voltage at power
antenna connector terminal 1.
Does the battery voltage match the specified value?
11–14 v Go to Step 7 Go to Step 6
6 Repair the open circuit between power antenna con-
nector terminal 1 and fuse EF29.
Is the repair complete?
System OK
7 Use an ohmmeter to test the ground circuit at power
antenna connector terminal 2.
Does the resistance match the specified value?
0 – 0.5 W Go to Step 9 Go to Step 8
8 Repair the open ground circuit between power an-
tenna connector terminal 2 and ground G303.
Is the repair complete?
System OK
9
1. Turn the ignition ON.
2. Turn the radio ON.
3. Use a voltmeter to test for battery voltage at
power antenna connector terminal 3.
Does the battery voltage match the specified value?
11–14 v Go to Step 10 Go to Step 11
10 Replace the power antenna.
Is the repair complete?
System OK
11
1. Turn the ignition ON.
2. Turn the radio ON.
3. Use a voltmeter to test for battery voltage at
radio terminal 12.
Is the repair complete?
11–14 v Go to Step 12 Go to Step 13
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