Dodge Audio Repair Manual

BR/BE AUDIO 8A - 1

AUDIO

TABLE OF CONTENTS

page page

AUDIO

DESCRIPTION ..........................1

OPERATION ............................2

DIAGNOSIS AND TESTING - AUDIO ..........2

SPECIAL TOOLS

AUDIO SYSTEMS ......................4

ANTENNA BODY & CABLE

DESCRIPTION ..........................4

OPERATION ............................4

DIAGNOSIS AND TESTING - ANTENNA .......5

REMOVAL .............................6

INSTALLATION ..........................6

RADIO CHOKE RELAY

DESCRIPTION ..........................7

OPERATION ............................8

DIAGNOSIS AND TESTING - RADIO CHOKE

RELAY ...............................8

REMOVAL .............................8

INSTALLATION ..........................9

INSTRUMENT PANEL ANTENNA CABLE

REMOVAL .............................9

INSTALLATION ..........................9

RADIO

DESCRIPTION .........................10

OPERATION ...........................10

DIAGNOSIS AND TESTING - RADIO .........10

REMOVAL .............................11

INSTALLATION .........................11

RADIO NOISE SUPPRESSION COMPONENTS

DESCRIPTION .........................12

DIAGNOSIS AND TESTING - RADIO NOISE

SUPPRESSION COMPONENTS ...........12

ENGINE-TO-BODY GROUND STRAP

REMOVAL .............................12

INSTALLATION .........................13

CAB-TO- BED GROUND STRAP

REMOVAL .............................13

INSTALLATION .........................14

HEATER CORE GROUND STRAP

REMOVAL .............................14

INSTALLATION .........................14

REMOTE SWITCHES

DESCRIPTION .........................14

OPERATION ...........................15

DIAGNOSIS AND TESTING - REMOTE

SWITCHES ..........................15

REMOVAL .............................16

INSTALLATION .........................16

SPEAKER

DESCRIPTION .........................17

OPERATION ...........................17

DIAGNOSIS AND TESTING - SPEAKER ......17

A-PILLAR TWEETER SPEAKER

REMOVAL .............................18

INSTALLATION .........................19

FRONT DOOR SPEAKER

REMOVAL .............................19

INSTALLATION .........................19

REAR CAB SIDE PANEL SPEAKER

REMOVAL .............................20

INSTALLATION .........................20

REAR DOOR SPEAKER

REMOVAL .............................20

INSTALLATION .........................21

AUDIO

DESCRIPTION

An audio system is standard factory-installed equipment on this model, unless the vehicle is ordered with an available radio delete option. The standard equipment audio system includes an AM/FM/cassette (RAS sales code) receiver, and speakers in four locations. Several combinations of radio receivers and speaker systems are offered as optional equipment on this model. The audio system uses an ignition switched source of battery current so that the system will only operate when the ignition switch is in the On or Accessory positions. The audio system includes the following components:

• Antenna

• Clockspring (with remote radio switches only)

• Filter, choke and speaker relay (with premium

speaker system only)

• High-line or premium Central Timer Module

(CTM) (with remote radio switches)

• Radio noise suppression components

• Radio receiver

• Remote radio switches (optional with RAZ radio

receiver only)

• Speakers

Refer to Electrical, Restraints for more information on the clockspring. Refer to Electrical, Body Control/ Central Control Module for more information on the Central Timer Module. Refer to the appropriate wiring information. The wiring information includes wir-

8A - 2 AUDIO BR/BE

AUDIO (Continued)

ing 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 connectors, splices and grounds. Following are general descriptions of the remaining major components in the standard and optional factory-installed audio systems.

OPERATION

See the owner’s manual in the vehicle glove box for more information on the features, use and operation of each of the available audio systems.

CENTRAL TIMER MODULE

The high-line or premium Central Timer Module (CTM) can also control some features of the audio system when the vehicle is equipped with the optional RAZ radio receiver and remote radio switches. A high-line CTM is used on high-line versions of this vehicle. A premium CTM is used on vehicles equipped with the optional heated seats. The CTM combines the functions of a chime/buzzer module, an intermittent wipe module, an illuminated entry module, a remote keyless entry module, and a vehicle theft security system module in a single unit.

The high-line or premium CTM also controls and integrates many of the additional electronic functions and features included on models with this option. The RAZ radio receiver with a remote radio switch option is one of the features that the CTM controls. The CTM is programmed to send switch status mes-

sages over the Chrysler Collision Detection (CCD) data bus to control the volume, seek, and pre-set station advance functions of the RAZ radio receiver. The CTM monitors the status of the remote radio switches located on the steering wheel through a hard wired circuit. The CTM then sends the proper switch status messages to the radio receiver. The electronic circuitry within the radio receiver responds to the switch status messages it receives by adjusting the radio settings as requested.

Refer to Electrical, Body Control/Central Timer Module for more information on the high-line CTM. Refer to Remote Radio Switch in Description and Operation for more information on this component. In addition, radio receivers connected to the CCD data bus have several audio system functions that can be diagnosed using a DRBIIIt scan tool. Refer to the proper Diagnostic Procedures manual for more information on DRBIIIt testing of the audio systems.

DIAGNOSIS AND TESTING - AUDIO

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, 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.

Audio System Diagnosis

CONDITION POSSIBLE CAUSE CORRECTION

NO AUDIO 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.

6. Speakers faulty. 6. Refer to Speaker in the Diagnosis and Testing section of this group.

7. Amplifier faulty (if

equipped).

7. Refer to Speaker in the Diagnosis and Testing section of this group.

BR/BE AUDIO 8A - 3

AUDIO (Continued)

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 TIME

POOR RADIO RECEPTION

NO/POOR TAPE OPERATION

NO COMPACT DISC OPERATION

1. 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.

1. 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.

1. Faulty tape. 1. Insert known good tape and test operation.

2. Foreign objects behind

tape door.

3. Dirty cassette tape

head.

4. Faulty tape deck. 4. Exchange or replace radio, if required.

1. Faulty CD. 1. Insert known good CD and test operation.

2. Foreign material on

CD.

3. Condensation on CD

or optics.

4. Faulty CD player. 4. Exchange or replace radio, if required.

4. Refer to Radio Frequency Interference in the Diagnosis and Testing section of this group.

2. Remove foreign objects and test operation.

3. Clean head with Mopar Cassette Head Cleaner.

2. Clean CD and test operation.

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

8A - 4 AUDIO BR/BE

AUDIO (Continued)

SPECIAL TOOLS

AUDIO SYSTEMS

Antenna Nut Wrench C-4816

ANTENNA BODY & CABLE

DESCRIPTION

The antenna body and cable are not readily visible in their installed positions in the vehicle. The most visible component of the antenna body and cable are the antenna adapter and the antenna cap nut, which are located on the top of the right front fender panel of the vehicle, near the right end of the cowl plenum. The antenna body and cable are secured below the fender panel by the antenna cap nut through a prefabricated and dedicated mounting hole in the top of the right front fender. The primary coaxial antenna cable is then routed beneath the fender sheet metal and through a prefabricated and dedicated cable entry hole in the right cowl side panel into the interior of the vehicle. Inside the vehicle, the primary coaxial cable is connected to a secondary instrument panel antenna coaxial cable with an in-line connector that is located behind the right end of the instrument panel. The secondary coaxial cable is then routed behind the instrument panel to the back of the radio.

The factory-installed radio antenna body and cable consists of the following components:

• Antenna adapter - The antenna adapter is sometimes also referred to as the antenna bezel or escutcheon.

• Antenna body - The die cast white metal antenna body is the mating structure between the antenna mast and the primary antenna coaxial cable.

• Antenna cable - This vehicle uses a two-piece antenna coaxial cable. The primary antenna cable is integral to the antenna body, and the secondary antenna cable connects the primary cable to the radio.

• Antenna cap nut - The antenna cap nut is a special, bright-plated threaded fastener that captures the antenna adapter and retains the antenna body to the fender sheet metal.

The components of the radio antenna body and cable cannot be adjusted or repaired. All factory-installed radios automatically compensate for radio antenna trim. Therefore, no antenna trimmer adjustment is required or possible after replacing the antenna body and cable or the radio. If an antenna body and cable component is damaged or faulty, it must be replaced. Other than the primary antenna cable, which is integral to the antenna body, the individual components of the antenna are available for service replacement.

OPERATION

The antenna body and cable connects the antenna mast to the radio. The radio antenna is an electromagnetic circuit component used to capture radio frequency signals that are broadcast by local commercial radio stations in both the Amplitude Modulating (AM) and Frequency Modulating (FM) frequency ranges. These electromagnetic radio frequency 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.

The antenna body includes an integral flange that mates with and grounds the antenna body to the underside of the fender panel sheet metal. Above the fender panel, the antenna body has a short nipple that is externally threaded to accept the antenna cap nut. Inside the nipple is a plastic insulator tube, and inside this insulator is an internally threaded metal receptacle that accepts the adapter stud on the bottom of the antenna mast. The antenna adapter serves as an above fender interface to mount and secure the antenna body to the vehicle. The antenna adapter is a black molded plastic component that provides a functional transition between the top of the fender and the antenna cap nut, while concealing the edges of the antenna mounting hole and protecting the painted finish of the fender from marring as the antenna cap nut is tightened. The adapter is installed over and shrouds the threaded nipple of the antenna body, which is installed from under and protrudes through the top of the mounting hole in the fender. The antenna cap nut is installed on top of the antenna adapter and tightened onto the external threads of the antenna body nipple to effectively secure and ground the antenna body to the fender.

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ANTENNA BODY & CABLE (Continued)

Three notches on the outer circumference of the cap nut are engaged by matching projections of an antenna nut wrench (Special Tool C-4816) to facilitate the removal and installation of this special fastener. Proper tightening of the antenna cap nut is critical to ensuring proper grounding of the antenna body to the fender sheet metal, which is necessary for clear radio signal reception.

A short length of coaxial cable serves as the primary antenna cable. The center conductor of the cable is connected to the antenna mast receptacle. The outer wire mesh of the cable is connected to and grounded through the antenna body. One end of the primary antenna cable is securely crimped to the lower end of the antenna body, while the opposite end features a simple push/pull-type male coaxial cable connector that serves as the in-line connector to the instrument panel (secondary) antenna coaxial cable. The primary coaxial cable includes a grommet that seals the cable to an entry hole in the right cowl side outer panel where the cable passes into the passenger compartment of the vehicle. The secondary antenna cable has a push/pull-type male coaxial cable connector on the radio end, and a push/pulltype female coaxial cable connector on the opposite end, which serves as the in-line connector to the primary antenna cable. In the passenger compartment the primary cable is routed to the lower right side of the instrument panel, where it is connected to the secondary instrument panel antenna cable. The instrument panel antenna cable is routed near the instrument panel wire harness through the instrument panel to the radio and is secured to the instrument panel structural support with small metal push-on retainers. This two-piece antenna cable arrangement allows the instrument panel or the antenna body and cable to be removed or installed without disturbing the radio.

DIAGNOSIS AND TESTING - ANTENNA

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 coaxial shield test.

The ohmmeter test lead connections for each test

are shown in Antenna Tests (Fig. 1).

NOTE: This model has a two-piece antenna coaxial cable. Tests 2 and 4 must be conducted in two steps to isolate a coaxial cable problem; from the coaxial cable connection under the right end of the instrument panel near the right cowl side inner panel to the antenna base, and then from the coaxial cable connection to the radio receiver chassis connection.

Fig. 1 Antenna Tests

TEST 1

Test 1 determines if the antenna mast is insulated

from the base. Proceed as follows:

(1) Disconnect and isolate the antenna coaxial

cable connector from the radio receiver chassis.

(2) Connect one ohmmeter test lead to the tip of the antenna mast. Connect the other test lead to the antenna base. Check for continuity.

(3) There should be no continuity. If continuity is found, replace the faulty or damaged antenna base and cable assembly.

TEST 2

Test 2 checks the antenna for an open circuit as follows:

(1) Disconnect the antenna coaxial cable connector from the radio receiver chassis.

(2) Connect one ohmmeter test lead to the tip of the antenna mast. Connect the other test lead to the center pin of the antenna coaxial cable connector.

(3) Continuity should exist (the ohmmeter should only register a fraction of an ohm). High or infinite resistance indicates damage to the base and cable

8A - 6 AUDIO BR/BE

ANTENNA BODY & CABLE (Continued)

assembly. Replace the faulty or damaged antenna base and cable, if required.

TEST 3

Test 3 checks the condition of the vehicle body ground connection. This test should be performed with the battery positive cable removed from the battery. Disconnect both battery cables, the negative cable first. Reconnect the battery negative cable and perform the test as follows:

(1) Connect one ohmmeter test lead to the vehicle fender. Connect the other test lead to the battery negative terminal post.

(2) The resistance should be less than one ohm.

(3) If the resistance is more than one ohm, check the braided ground strap(s) connected to the engine and the vehicle body for being loose, corroded, or damaged. Repair the ground strap connections, if required.

TEST 4

Test 4 checks the condition of the ground between the antenna base and the vehicle body as follows:

(1) Connect one ohmmeter test lead to the vehicle fender. Connect the other test lead to the outer crimp on the antenna coaxial cable connector.

(2) The resistance should be less then one ohm.

(3) If the resistance is more then one ohm, clean and/or tighten the antenna base to fender mounting hardware.

REMOVAL

(1) Disconnect and isolate the battery negative cable.

(2) Reach under the passenger side of the instrument panel near the right cowl side inner panel to disengage the coaxial cable connector from the retainer clip located on the bottom of the heater-A/C housing (Fig. 2).

(3) Remove the foam tape to access the coaxial cable connector. Disconnect the connector by pulling it apart while twisting the metal connector halves. Do not pull on the cable.

(4) Securely tie a suitable length of cord or twine to the antenna half of the coaxial cable connector. This cord will be used to pull or “fish” the cable back into position during installation.

(5) Reach above the Powertrain Control Module (PCM) on the right side of the dash panel in the engine compartment to disengage the antenna coaxial cable grommet from the hole in the dash panel (Fig. 3).

(6) Pull the antenna coaxial cable out of the passenger compartment and into the engine compartment through the hole in the dash panel.

Fig. 2 Antenna Coaxial Cable Connector

1 - RETAINER CLIP 2 - TO RADIO 3 - TO ANTENNA 4 - FOAM TAPE

(7) Raise the sleeve on the antenna mast far enough to access and unscrew the antenna mast from the antenna body (Fig. 4).

(8) Remove the antenna cap nut using an antenna nut wrench (Special Tool C-4816) (Fig. 5).

(9) Remove the antenna adapter from the top of the fender.

(10) Lower the antenna body and cable assembly through the top of the fender.

(11) Pull the antenna body and cable out through the opening between the right cowl side outer panel and the top of the fender, while feeding the antenna coaxial cable out of the engine compartment through the hole in the right cowl side reinforcement.

(12) Untie the cord or twine from the antenna body and cable coaxial cable connector, leaving the cord or twine in the place of the cable through the vehicle.

(13) Remove the antenna body and cable from the vehicle.

INSTALLATION

(1) Tie the end of the cord or twine that was used during instrument panel antenna cable removal securely to the connector on the end of the antenna cable being installed into the instrument panel. This cord will be used to pull or “fish” the cable back into position.

BR/BE AUDIO 8A - 7

ANTENNA BODY & CABLE (Continued)

Fig. 5 Antenna Cap Nut Remove/Install - Typical

1 - CAP NUT 2 - ANTENNA ADAPTER 3 - TOOL

Fig. 3 Antenna Mounting

1 - COWL SIDE REINFORCEMENT 2 - DASH PANEL 3 - GROMMET 4 - ANTENNA BODY AND CABLE 5 - ADAPTER 6 - MAST 7 - SLEEVE 8 - NUT

(4) Reach through the glove box opening to engage the antenna cable with the retainer clips on the back of the instrument panel.

(5) Install the glove box onto the instrument panel.

(6) Untie the cord or twine from the instrument panel antenna cable connector.

(7) Reach under the passenger side of the instrument panel near the right cowl side inner panel to reconnect the two halves of the radio antenna coaxial cable connector. Wrap the connection with a piece of foam tape.

(8) Engage the coaxial cable connector with the retainer clip located on the bottom of the heater-A/C housing.

(9) Reconnect the battery negative cable.

Fig. 4 Antenna Mast Remove/Install - Typical

1 - ANTENNA MAST 2 - CAP NUT 3 - ADAPTER

(2) Using the cord or twine, pull the antenna cable through the radio receiver opening from under the instrument panel.

(3) Install the radio receiver onto the instrument panel.

RADIO CHOKE RELAY

DESCRIPTION

Models equipped with the Infinity premium speaker package have a filter, choke, and speaker relay unit. The filter, choke, and speaker relay unit is mounted to the lower instrument panel center brace, inboard of the Central Timer Module (CTM) and directly above the 16-way data link connector. The filter, choke, and speaker relay unit can be accessed for service without instrument panel disassembly or removal.

The filter, choke, and speaker relay unit should be checked if there is no sound output noted from the speakers. The filter, choke, and speaker relay unit cannot be repaired or adjusted and, if faulty or damaged, the unit must be replaced.

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