Dodge Factory Audio 2003 Service Manual

DR AUDIO 8A - 1

AUDIO

TABLE OF CONTENTS

page page

AUDIO

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

OPERATION ............................1

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

AMPLIFIER

DESCRIPTION ..........................3

OPERATION ............................3

REMOVAL .............................3

INSTALLATION ..........................4

ANTENNA BODY & CABLE

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

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

DIAGNOSIS AND TESTING - ANTENNA BODY

AND CABLE ..........................4

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

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

INSTRUMENT PANEL ANTENNA CABLE

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

INSTALLATION ..........................7

RADIO

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

AUDIO

DESCRIPTION

An audio system is standard factory-installed equipment on this model. Several combinations of radio receivers and speaker systems are offered. 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 RUN or ACCESSORY positions.

The audio system includes the following components:

• Antenna

• Power amplifier (with premium speaker system

only)

• Radio noise suppression components

• Radio receiver

• Remote radio switches (if equipped)

• Speakers

Certain functions and features of the audio system rely upon resources shared with other electronic modules in the vehicle over the Programmable Communication Interface (PCI) bus network. The data bus network allows the sharing of sensor information. For diagnosis of these electronic modules or of the data bus network, the use of a DRB IIIt scan tool

OPERATION ............................7

REMOVAL .............................7

INSTALLATION ..........................8

RADIO NOISE SUPPRESSION GROUND STRAP

DESCRIPTION ..........................8

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

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

INSTALLATION .........................10

REMOTE SWITCHES

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

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

DIAGNOSIS AND TESTING - REMOTE

SWITCHES ..........................11

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

INSTALLATION .........................12

SPEAKER

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

OPERATION ...........................12

DIAGNOSIS AND TESTING - SPEAKER ......13

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

INSTALLATION .........................15

and the proper Diagnostic Procedures manual are recommended.

Refer to the appropriate wiring information for complete standard and premium audio system circuit diagrams. The wiring information includes proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices, and grounds.

OPERATION

The audio system components are designed to provide audio entertainment and information through the reception, tuning and amplification of locally broadcast radio signals in both the Amplitude Modulating (AM) and Frequency Modulating (FM) commercial frequency ranges.

The audio system components operate on battery current received through a fuse in the Integrated Power Module (IPM) on a fused ignition switch output (run-acc) circuit so that the system will only operate when the ignition switch is in the Run or Accessory positions.

On vehicles that are equipped with the optional remote radio switches, the Instrument Cluster receives hard wired resistor multiplexed inputs from the remote radio switches. The programming in the

8A - 2 AUDIO DR

AUDIO (Continued)

Instrument Cluster allows it to process those inputs and send the proper messages to the radio receiver over the Programmable Communication Interface (PCI) bus network to control the radio volume up or down, station seek up or down, preset station advance, and mode advance functions.

Refer to the owner’s manual for more information on the features, use and operation of each of the available audio systems.

DIAGNOSIS AND TESTING - AUDIO

Any diagnosis of the Audio system should begin with the use of the DRB IIIt diagnostic tool. For information on the use of the DRB IIIt, refer to the appropriate Diagnostic Service Manual.

Refer to the appropriate 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 connectors, splices and grounds.

WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, SEAT BELT TENSIONER, SIDE AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

AUDIO SYSTEM DIAGNOSIS TABLE

CONDITION POSSIBLE CAUSES CORRECTION

NO AUDIO 1. Fuse faulty. 1. Check radio fuse and Ignition-Off Draw (IOD)

fuse in the Integrated Power Module (IPM). Replace fuses, if required.

2. Radio/amplifier (if equipped) connector faulty.

3. Wiring faulty. 3. Check for shorted or open wires. Repair wiring,

4. Radio/amplifier (if equipped) ground faulty.

5. Radio/amplifier (if equipped) faulty.

6. Speakers faulty. 6. Replace speaker as necessary.

NO RADIO DISPLAY 1. Fuse faulty. 1. Check radio fuse and Ignition-Off Draw (IOD)

2. Radio connector faulty. 2. Check for loose or corroded radio connector.

3. Wiring faulty. 3. Check for battery voltage at radio connector.

4. Radio ground faulty. 4. Check for continuity between radio chassis and

5. Radio faulty. 5. Refer to appropriate Diagnostic Service

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

if required.

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

5. Refer to appropriate Diagnostic Service Manual.

fuse in Integrated Power Module (IPM). Replace fuses, if required.

Repair, if required.

Repair wiring, if required.

a known good ground. There should be continuity. Repair ground, if required.

Manual.

DR AUDIO 8A - 3

AUDIO (Continued)

CONDITION POSSIBLE CAUSES CORRECTION

CLOCK WILL NOT KEEP SET TIME

POOR RADIO RECEPTION 1. Antenna faulty. 1. (Refer to 8 - ELECTRICAL/AUDIO/ANTENNA

NO/POOR TAPE OPERATION

NO COMPACT DISC OPERATION

1. Fuse faulty. 1. Check Ignition-Off Draw (IOD) fuse in the Integrated Power Module (IPM). Replace fuse, if required.

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

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

4. Radio 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 appropriate Diagnostic Service Manual.

BODY & CABLE - DIAGNOSIS AND TESTING).

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

3. Radio noise suppression

faulty.

4. Radio faulty. 4. Refer to appropriate Diagnostic Service

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

2. Foreign objects behind

tape door.

3. Dirty cassette tape head. 3. Clean head with Mopar Cassette 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. 2. Clean CD and test operation.

3. Condensation on CD or

optics.

4. Faulty CD player. 4. Refer to appropriate Diagnostic Service

3. Repair or replace ground strap as necessary.

Manual.

2. Remove foreign objects and test operation.

Cleaner.

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

Manual.

AMPLIFIER

DESCRIPTION

The optional Infinity premium speaker system includes a separate Infinity audio power amplifier. The amplifier is a six channel unit and is rated at 240 total output watts. The amplifier is located behind the glove box.

OPERATION

The power amplifier electronically increases the frequency response of the normal audio signal output from the radio amplifier in order to improve the acoustic performance of the speakers. On vehicles

equipped with an amplifier, the amplifier section of the radio becomes a pre-amplifier.

The amplifier receives audio signal inputs for speaker channels from the radio, then sends amplified audio outputs through six separate channels with dedicated feed and return circuits to the individual speakers.

REMOVAL

(1) Disconnect and isolate the battery negative cable.

(2) Remove glove box (Refer to 23 - BODY/INSTRUMENT PANEL/GLOVE BOX - REMOVAL).

8A - 4 AUDIO DR

AMPLIFIER (Continued)

(3) Remove instrument panel center bezel (Refer to 23 - BODY/INSTRUMENT PANEL/INSTRUMENT PANEL CENTER BEZEL - REMOVAL).

(4) Remove instrument panel lower right center bezel (Refer to 23 - BODY/INSTRUMENT PANEL/IP LOWER RIGHT CENTER BEZEL - REMOVAL).

(5) Disconnect electrical harness connector from amplifier (Fig. 1).

Fig. 1 AMPLIFIER MOUNTING

1 - INSTRUMENT PANEL 2 - AMPLIFIER 3 - MOUNTING BOLTS 4 - ELECTRICAL CONNECTOR

(6) Remove mounting bolts.

INSTALLATION

(1) Connect electrical harness connector and install amplifier.

(2) Install mounting bolts. Tighten to 10 N·m (90 in. lbs.).

(3) Install instrument panel lower right center bezel (Refer to 23 - BODY/INSTRUMENT PANEL/IP LOWER RIGHT CENTER BEZEL - INSTALLATION).

(4) Install instrument panel center bezel (Refer to 23 - BODY/INSTRUMENT PANEL/INSTRUMENT PANEL CENTER BEZEL - INSTALLATION).

(5) Install glove box (Refer to 23 - BODY/INSTRUMENT PANEL/GLOVE BOX - INSTALLATION).

(6) Connect battery negative cable.

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 connected 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 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.

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.

The ohmmeter test lead connections for each test are shown in the illustration (Fig. 2).

DR AUDIO 8A - 5

ANTENNA BODY & CABLE (Continued)

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 behind the right side kick panel to the antenna body. Then, test the secondary antenna cable (instrument panel antenna cable) from the coaxial cable connector behind the right side kick panel to the coaxial cable connector at the radio.

Fig. 2 Antenna Tests - Typical

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 behind the right side kick panel.

(2) Touch one ohmmeter test lead to the tip of the antenna mast. Touch the other test lead to known ground. 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 connector at the radio. If an open circuit is detected, each of the three antenna conductor components (antenna mast, antenna body and cable, instrument panel antenna 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 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 follows:

(1) This test must be performed with the battery positive cable disconnected from the battery. Disconnect 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 vehicle 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 behind the right side kick 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. 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

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