Mitsubishi Galant 9G. Manual — part 1579
RADIO WITH CD PLAYER
TSB Revision
CHASSIS ELECTRICAL
54A-188
INSPECTION PROCEDURE 14: Noise Appears During Vibration or Shocks.
DIAGNOSIS
STEP 1. Check the fit of antenna feeder cable.
Q: Is the antenna feeder cable fitted securely?
YES : Go to Step 2.
NO : Ensure that the antenna base and the radio and CD
player or radio, CD player and CD changer are fitted
securely. Check that there is no noise.
AC306983
AB
GROUND CABLE
WASHER TANK ASSEMBLY
<2.4 L>
AC306984
AB
GROUND CABLE
<3.8 L>
WASHER TANK ASSEMBLY
AC306986
AB
NOISE CAPACITOR
<2.4 L>
AC306987
AB
NOISE CAPACITOR
<3.8 L>
RADIO WITH CD PLAYER
TSB Revision
CHASSIS ELECTRICAL
54A-189
STEP 2. Check radio and CD player connector C-107, C-111
or radio, CD player and CD changer connector C- 111, C-
116, C-117 and amplifier connector C-113, C-114 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
AC305234
CONNECTORS: C-107, C-111
C-111
HARNESS SIDE
C-111
3
9
4
12
14
6
13
5
1110
8
2
7
1
BC
C-107
HARNESS SIDE
C-107
21
22
23
24
25
26
27
28
AC305234
C-113
C-114
HARNESS SIDE
C-113
HARNESS SIDE
C-114
21
22
23
24
25
26
27
28
29
30
31
32
BE
CONNECTORS: C-113, C-114
RADIO WITH CD PLAYER
TSB Revision
CHASSIS ELECTRICAL
54A-190
Q: Are radio and CD player connector C-107, C-111 or
radio, CD player and CD changer connector C- 111, C-
116, C-117 and amplifier connector C-113, C-114 in good
condition?
YES : Go to Step 3.
NO : Repair or replace the component(s). Refer to GROUP
00E, Harness Connector Inspection
. Check
that there is no noise.
STEP 3. Check that noise appears when the radio switch is
turned on while the vehicle is stopped and the radio is
tapped while tuned away from a station.
NOTE: Body static electricity from the shock absorber rubber
bushings used to prevent vibration, tires, etc. occurs because
of separation from the ground, causing a buzzing noise. Since
no measures can be taken to discharge the static electricity of
the vehicle body. Check that there is no noise.
Q: Does noise appear when the radio switch is turned on
while the vehicle is stopped and the radio is tapped
while tuned away from a station?
YES : Go to Step 4.
NO : It may be static electricity noise.
STEP 4. Verify that the radio is correctly grounded.
Q: Is the radio correctly grounded?
YES : Go to Step 5.
NO : Check that there is no noise.
STEP 5. Check by replacing radio and CD player or radio,
CD player and CD changer.
Q: Do the other radio and CD player or radio, CD player
and CD changer work normally?
YES : Either repair or replace the original radio and CD
player or radio, CD player and CD changer. Check
that there is no noise.
NO : Either repair or replace the antenna assembly. Check
that there is no noise.
AC305234
C-117
C-116
HARNESS SIDE
C-116
C-117
HARNESS SIDE
BD
CONNECTORS: C-116, C-117
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
RADIO WITH CD PLAYER
TSB Revision
CHASSIS ELECTRICAL
54A-191
INSPECTION PROCEDURE 15: Noise is Present While Moving (FM).
DIAGNOSIS
STEP 1. Check the radio after adjusting it.
Q: Readjust the radio. Is the noise eliminated?
YES : Check that there is no noise.
NO : Go to Step 2.
STEP 2. Check with several broad casting.
NOTE: Multipath noise and fading noise: Because of the fre-
quency of FM waves in extremely high, it is highly susceptible
to effects from geological formations and buildings. These
effects disrupt the broadcast signal and obstruct reception in
several ways.
.
•
Multipath noise
This describes the echo that occurs when the broadcast
signal is reflected by a large obstruction and enters the
receiver with a slight time delay relative to the direct signal
(repetitious buzzing).
•
Fading noise
This is a buzzing noise that occurs when the broadcast sig-
nal is disrupted by obstructing objects and the signal
strength fluctuates intricately within a narrow range.
Q: Is the problem station or location specific?
YES : The effect of an electrical field condition (multipath
noise, fading noise) could be the cause. Check that
there is not noise.
NO : Go to Step 3.
STEP 3. Check that noise appears when the radio switch is
turned on while the vehicle is stopped.
NOTE: Body static electricity from the shock absorber rubber
bushings used to prevent vibration, tires, etc. occurs because
of separation from the ground, causing a buzzing noise. There
is no measures to discharge the static electricity of the vehicle
body. Check that there is no noise.
Q: Does noise appear when the radio switch is turned on
while the vehicle is stopped and the radio is tapped
while tuned away from a station?
YES : Go to Step 4.
NO : It may be static electricity noise.
STEP 4. Verify that the radio is correctly grounded.
Q: Is the radio correctly grounded?
YES : Go to Step 5.
NO : Check that there is no noise.
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