CD player DODGE RAM 2002 Service Repair Manual

Audio System Diagnosis
CONDITION POSSIBLE CAUSE CORRECTION
NO DISPLAY 1. Fuse faulty. 1. Check radio fuses in junction block. Replace faulty
fuses, if required.
2. Radio connector faulty. 2. Check for loose or corroded radio connections. Repair,
if required.
3. Wiring faulty. 3. Check for battery voltage at radio connector. Repair
wiring, if required.
4. Ground faulty. 4. Check for continuity between radio chassis and a
known good ground. There should be continuity. Repair
ground, if required.
5. Radio faulty. 5. Refer to Radio in the Diagnosis and Testing section of
this group.
CLOCK WILL NOT KEEP
SET TIME1. Fuse faulty. 1. Check ignition-off draw fuse. Replace faulty fuse, if
required.
2. Radio connector faulty. 2. Check for loose or corroded radio connections. Repair,
if required.
3. Wiring faulty. 3. Check for battery voltage at radio connector. Repair
wiring, if required.
4. Ground faulty. 4. Check for continuity between radio chassis and a
known good ground. There should be continuity. Repair
ground, if required.
5. Radio faulty. 5. Refer to Radio in the Diagnosis and Testing section of
this group.
POOR RADIO
RECEPTION1. Antenna faulty. 1. Refer to Antenna in the Diagnosis and Testing section
of this group.
2. Ground faulty. 2. Check for continuity between radio chassis and a
known good ground. There should be continuity. Repair
ground, if required.
3. Radio faulty. 3. Refer to Radio in the Diagnosis and Testing section of
this group.
4. Faulty EMI or RFI
noise suppression.4. Refer to Radio Frequency Interference in the Diagnosis
and Testing section of this group.
NO/POOR TAPE
OPERATION1. Faulty 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. Faulty tape deck. 4. Exchange or replace radio, if required.
NO COMPACT DISC
OPERATION1. Faulty CD. 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. Faulty CD player. 4. Exchange or replace radio, if required.
BR/BEAUDIO 8A - 3
AUDIO (Continued)

RADIO
DESCRIPTION
Available factory-installed radio receivers for this
model include an AM/FM/cassette (RAS sales code),
an AM/FM/CD/3-band graphic equalizer (RBR sales
code), or an AM/FM/CD/cassette/3-band graphic
equalizer (RAZ sales code). The factory-installed RAZ
sales code radio receivers can also communicate on
the Chrysler Collision Detection (CCD) data bus net-
work through a separate two-way wire harness con-
nector. All factory-installed receivers are stereo
Electronically Tuned Radios (ETR) and include an
electronic digital clock function.
These radio receivers can only be serviced by an
authorized radio repair station. See the latest War-
ranty Policies and Procedures manual for a current
listing of authorized radio repair stations.
All vehicles are equipped with an Ignition-Off
Draw (IOD) fuse that is removed when the vehicle is
shipped from the factory. This fuse feeds various
accessories that require battery current when the
ignition switch is in the Off position, including the
clock. The IOD fuse is removed to prevent battery
discharge during vehicle storage.
When removing or installing the IOD fuse, it is
important that the ignition switch be in the Off posi-
tion. Failure to place the ignition switch in the Off
position can cause the radio display to become scram-
bled when the IOD fuse is removed and replaced.
Removing and replacing the IOD fuse again, with the
ignition switch in the Off position, will correct the
scrambled display condition.
The IOD fuse should be checked if the radio or
clock displays are inoperative. The IOD fuse is
located in the junction block. Refer to the fuse layout
label on the back of the instrument panel fuse access
panel for IOD fuse identification and location.
OPERATION
The radio receiver operates on fused battery cur-
rent that is available only when the ignition switch is
in the On or Accessory positions. The electronic digi-
tal clock function of the radio operates on fused bat-
tery current supplied through the IOD fuse,
regardless of the ignition switch position.
For more information on the features, setting pro-
cedures, and control functions for each of the avail-
able factory-installed radio receivers, see the owner's
manual in the vehicle glove box. For complete circuit
diagrams, refer to the appropriate wiring informa-
tion. The wiring information includes wiring dia-
grams, proper wire and connector repair procedures,
details of wire harness routing and retention, connec-
tor pin-out information and location views for the
various wire harness connectors, splices and grounds.
DIAGNOSIS AND TESTING - RADIO
If the vehicle is equipped with the optional remote
radio switches located on the steering wheel and the
problem being diagnosed is related to one of the
symptoms listed below, be certain to check the
remote radio switches and circuits. Refer to Audio,
Remote Radio Switch prior to attempting radio diag-
nosis or repair.
²Stations changing with no remote radio switch
input
²Radio memory presets not working properly
²Volume changes with no remote radio switch
input
²Remote radio switch buttons taking on other
functions
²CD player skipping tracks
²Remote radio switch inoperative.
For complete circuit diagrams, refer to the appro-
priate wiring information. The wiring information
includes wiring diagrams, proper wire and connector
repair procedures, details of wire harness routing
and retention, connector pin-out information and
location views for the various wire harness connec-
tors, splices and grounds.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO ELECTRICAL, RESTRAINTS
BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, OR INSTRUMENT PANEL
COMPONENT DIAGNOSIS OR SERVICE. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
CAUTION: The speaker output of the radio receiver
is a ªfloating groundº system. Do not allow any
speaker lead to short to ground, as damage to the
radio receiver may result.
(1) Check the fused B(+) fuse in the junction block.
If OK, go to Step 2. If not OK, repair the shorted cir-
cuit or component as required and replace the faulty
fuse.
(2) Check for battery voltage at the fused B(+) fuse
in the junction block. If OK, go to Step 3. If not OK,
repair the open fused B(+) circuit to the Power Dis-
tribution Center (PDC) as required.
(3) Check the fused ignition switch output (acc/
run) fuse in the junction block. If OK, go to Step 4. If
not OK, repair the shorted circuit or component as
required and replace the faulty fuse(s).
(4) Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output (acc/run) fuse in the junction block. If OK, go
to Step 5. If not OK, repair the open fused ignition
8A - 10 AUDIOBR/BE