Dodge Neon / Neon SRT-4. Manual — part 70

AUDIO SYSTEM DIAGNOSIS

CONDITION

POSSIBLE CAUSES

CORRECTION

NO AUDIO

1. Fuse inoperative.

1. Check radio fuse and Ignition-Off Draw (IOD)
fuse in Junction Block (JB). Replace fuses, if
required.

2. Radio connector
damaged.

2. Check for loose or corroded radio connector.
Repair, if required.

3. Wiring damaged.

3. Check for shorted or open wires. Repair wiring,
if required.

4. Radio ground damaged.

4. Check for continuity between radio chassis and
a known good ground. There should be
continuity. Repair ground, if required.

5. Radio inoperative.

5. Refer to appropriate Diagnostic Service
Manual.

6. Speakers inoperative.

6. Replace speaker as necessary.

NO RADIO DISPLAY

1. Fuse inoperative.

1. Check radio fuse and Ignition-Off Draw (IOD)
fuse in Junction Block (JB). Replace fuses, if
required.

2. Radio connector
damaged.

2. Check for loose or corroded radio connector.
Repair, if required.

3. Wiring damaged.

3. Check for battery voltage at radio connector.
Repair wiring, if required.

4. Radio ground damaged.

4. Check for continuity between radio chassis and
a known good ground. There should be
continuity. Repair ground, if required.

5. Radio inoperative.

5. Refer to appropriate Diagnostic Service
Manual.

CLOCK WILL NOT KEEP
SET TIME

1. Fuse inoperative.

1. Check Ignition-Off Draw (IOD) fuse in the
Junction Block (JB). Replace fuse, if required.

2. Radio connector
damaged.

2. Check for loose or corroded radio connector.
Repair, if required.

3. Wiring damaged.

3. Check for battery voltage at radio connector.
Repair wiring, if required.

4. Radio ground damaged.

4. Check for continuity between radio chassis and
a known good ground. There should be
continuity. Repair ground, if required.

5. Radio inoperative.

5. Refer to appropriate Diagnostic Service
Manual.

POOR RADIO RECEPTION

1. Antenna inoperative.

1. (Refer to 8 - ELECTRICAL/AUDIO/ANTENNA
BODY & CABLE - DIAGNOSIS AND TESTING).

2. Radio ground damaged.

2. Check for continuity between radio chassis and
a known good ground. There should be
continuity. Repair ground, if required.

3. Radio noise suppression
inoperative.

3. Repair or replace ground strap as necessary.

4. Radio inoperative.

4. Refer to appropriate Diagnostic Service
Manual.

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PL/SRT-4

AUDIO/VIDEO (Continued)

2004 PL/SRT-4 Service Manual
Publication No. 81-270-04028
04PL/SRT-48A-2

September, 2003

CONDITION

POSSIBLE CAUSES

CORRECTION

SOUND DISTORTION
(VIBRATION FROM
SPEAKER AREA, BUZZING -
HUMMING)

1. Door trim panel loose or
missing fasteners.

1. Inspect door trim panel and correct as
necessary.. Replace any missing fasteners.

2. Water shield loose or
misaligned.

2. Inspect water shield and adjust as necessary.

3. Items placed in door trim
panel map pockets vibrating
or moving from side to side.

3. Remove items from door trim panel. Ensure
that vibration is no longer present.

NO/POOR TAPE
OPERATION

1. Damaged tape.

1. Insert known good tape and test operation.

2. Foreign objects behind
tape door.

2. Remove foreign objects and test operation.

3. Dirty cassette tape head.

3. Clean head with Mopar Cassette Head
Cleaner.

4. radio inoperative.

4. Exchange or replace radio, if required.

NO COMPACT DISC
OPERATION

1. CD damaged.

1. Insert known good CD and test operation.

2. Foreign material on CD.

2. Clean CD and test operation.

3. Condensation on CD or
optics.

3. Allow temperature of vehicle interior to stabilize
and test operation.

4. Radio inoperative.

4. Refer to appropriate Diagnostic Service Manual.

ANTENNA BODY & CABLE

DESCRIPTION

The antenna body and cable is secured below the

fender panel by the antenna cap nut through a
mounting hole in the right front fender. The primary
coaxial antenna cable is then routed beneath the
fender sheet metal and through a entry hole in the
right cowl side panel into the interior of the vehicle.
Inside the vehicle, the primary coaxial cable is con-
nected to a secondary instrument panel antenna
coaxial cable with an in-line connector that is located
behind the right kick panel. The secondary coaxial
cable is then routed behind the instrument panel to
the back of the radio.

OPERATION

The antenna body and cable connects the antenna

mast to the radio. The radio antenna is an electro-
magnetic circuit component used to capture radio fre-
quency

signals

that

are

broadcast

by

local

commercial radio stations in both the Amplitude
Modulating (AM) and Frequency Modulating (FM)
frequency ranges. These electromagnetic radio fre-
quency signals induce small electrical modulations
into the antenna as they move past the mast. The
antenna body transfers the weak electromagnetic
radio waves induced into the rigid antenna mast into
the center conductor of the flexible primary antenna
coaxial cable. The braided outer shield of the
antenna coaxial cable is grounded through both the

antenna body and the radio chassis, effectively
shielding the radio waves as they are conducted to
the radio. The radio then tunes and amplifies the
weak radio signals into stronger electrical signals in
order to operate the audio system speakers.

DIAGNOSIS AND TESTING - ANTENNA BODY
AND CABLE

The following four tests are used to diagnose the

antenna with an ohmmeter:

• Test 1 - Mast to ground test

• Test 2 - Tip-of-mast to tip-of-conductor test

• Test 3 - Body ground to battery ground test

• Test 4 - Body ground to antenna coaxial cable

shield test.

WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRECAU-
TIONS COULD RESULT IN ACCIDENTAL AIRBAG
DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

The ohmmeter test lead connections for each test

are shown in the illustration (Fig. 1).

PL/SRT-4

AUDIO/VIDEO

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AUDIO/VIDEO (Continued)

2004 PL/SRT-4 Service Manual
Publication No. 81-270-04028
04PL/SRT-48A-3

September, 2003

NOTE: This model has a two-piece antenna coaxial
cable. Tests 2 and 4 must be conducted in two
steps to isolate an antenna cable problem. First,
test the primary antenna cable (integral to the
antenna body and cable) from the coaxial cable
connector under the right end of the instrument
panel near the right cowl side inner panel to the
antenna body. Then, test the secondary antenna
cable (instrument panel antenna cable) from the
coaxial cable connector under the right end of the
instrument panel near the right cowl side inner
panel to the coaxial cable connector at the radio.

TEST 1

Test 1 determines if the antenna mast is insulated

from ground. Proceed as follows:

(1) Disconnect and isolate the antenna coaxial

cable connector under the right end of the instru-
ment panel near the right cowl side inner panel.

(2) Touch one ohmmeter test lead to the tip of the

antenna mast. Touch the other test lead to the
antenna cap nut. Check the ohmmeter reading for
continuity.

(3) There should be no continuity. If OK, go to Test

2. If not OK, replace the faulty antenna body and
cable.

TEST 2

Test 2 checks the antenna conductor components

for an open circuit. This test should be performed
first on the entire antenna circuit, from the antenna
mast to the center conductor of the coaxial cable con-
nector at the radio. If an open circuit is detected,
each of the three antenna conductor components
(antenna mast, antenna body and primary cable unit,

instrument panel antenna secondary cable) should be
isolated and tested individually to locate the exact
component that is the source of the open circuit. To
begin this test, proceed as follows:

(1) Disconnect the instrument panel (secondary)

antenna cable coaxial connector from the back of the
radio.

(2) Touch one ohmmeter test lead to the tip of the

antenna mast. Touch the other test lead to the center
conductor pin of the instrument panel antenna cable
coaxial connector for the radio. Check the ohmmeter
reading for continuity.

(3) There should be continuity. The ohmmeter

should register only a fraction of an ohm resistance.
High or infinite resistance indicates a damaged or
open antenna conductor. If OK, go to Test 3. If not
OK, isolate and test each of the individual antenna
conductor

components.

Replace

only

the

faulty

antenna conductor component.

TEST 3

Test 3 checks the condition of the vehicle body

ground connection. To begin this test, proceed as fol-
lows:

(1) This test must be performed with the battery

positive cable disconnected from the battery. Discon-
nect and isolate both battery cables, negative cable
first.

(2) Reconnect the battery negative cable.
(3) Touch one ohmmeter test lead to a good clean

ground point on the vehicle fender. Touch the other
test lead to the battery negative terminal post. Check
the ohmmeter reading for continuity.

(4) There should be continuity. The ohmmeter

should register less than one ohm resistance. High or
infinite resistance indicates a loose, corroded, or
damaged connection between the battery negative
terminal and the vehicle body. If OK, go to Test 4. If
not OK, check the battery negative cable connection
to the vehicle body and the radio noise suppression
ground strap connections to the engine and the vehi-
cle body for being loose or corroded. Clean or tighten
these connections as required.

TEST 4

Test 4 checks the condition of the connection

between the antenna coaxial cable shield and the
vehicle body ground as follows:

(1) Disconnect and isolate the antenna coaxial

cable connector under the right end of the instru-
ment panel near the right cowl side inner panel.

(2) Touch one ohmmeter test lead to a good clean

ground point on the vehicle fender. Touch the other
test lead to the outer crimp on the antenna coaxial
cable connector under the right end of the instru-

Fig. 1 Antenna Tests - Typical

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PL/SRT-4

ANTENNA BODY & CABLE (Continued)

ment panel near the right cowl side inner panel.
Check the ohmmeter reading for continuity.

(3) There should be continuity. The ohmmeter

should register less than one ohm resistance. High or
infinite resistance indicates a loose, corroded, or
damaged connection between the antenna body and
the vehicle body or between the antenna body and
the antenna coaxial cable shield. If not OK, clean the
antenna body to fender mating surfaces and tighten
the antenna cap nut to specifications.

(4) Check the resistance again with an ohmmeter.

If the resistance is still more then one ohm, replace
the faulty antenna body and cable.

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Remove antenna mast by unscrewing mast

from antenna body.

(3) Locate the antenna lead disconnect in the

instrument panel wire harness above the passenger
side cowl trim panel. Disconnect the antenna cable
from the instrument panel cable lead.

(4) Unfasten push pins from the rear of the plastic

inner fender shield and move shield to gain access to
the base/cable assembly (Fig. 2).

(5) Remove cap nut and adapter. Remove base/ca-

ble assembly from bottom of the load beam.

INSTALLATION

(1) From under the fender, push the antenna base

and cable assembly through the hole in the fender.
Seat grommet in the load beam.

(2) From above the fender, place adapter, then the

cap nut on the base/cable assembly. Tighten the cap
nut to 7 N·m (61 in. lbs.).

(3) Seat the grommet in the side panel and con-

nect the cable to the instrument panel harness con-
nector.

(4) Install the plastic inner fender shield.
(5) Install passenger cowl side trim panel.
(6) Install antenna mast.
(7) Connect battery negative cable.

CD CHANGER

DESCRIPTION

The In-Dash CD Changer (if equipped) is located in

the instrument panel below the radio. The remote
changer does not use a cartridge or magazine for the
CD’s. Up to 6 CD’s (4 in some export markets) can be
directly loaded into this unit, one at a time.

OPERATION

Due to its compact design, the CD changer can

carry out only one operation at a time. For example,
you can not load a new disc while playing another at
the same time. Each operation happens sequentially.

The radio unit provides control over all features of

the CD changer with the exception of the CD load
and eject functions, which are controlled by buttons
located on the front of the CD changer. All features
you would expect, such as Disc Up/Down, Track
Up/Down, Random and Scan are controlled by the
radio, which also displays all relevant CD changer
information on the radio display.

The CD changer contains a Load/Eject button and

an indicator LED for each of the disc positions as
well as an illuminated disc opening. The individual
LED indicates whether a CD is currently loaded or
ready to load in that particular chamber of the CD
changer. Pressing the individual Load/Eject button
for a particular chamber will eject a disc currently
present in that chamber. If the chamber is currently
empty, actuating the Load/Eject button will position
that chamber to receive and load a new disc in that
chamber.

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Using a trim stick (special tool #C-4755), gently

pry out on CD changer bezel and remove.

Fig. 2 Mast and Antenna Assembly Mounting

PL/SRT-4

AUDIO/VIDEO

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ANTENNA BODY & CABLE (Continued)