Dodge Viper SRT-10 (ZB). Manual - part 55

WARNING:

DISABLE

THE

AIRBAG

SYSTEM

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 PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.

AUDIO SYSTEM DIAGNOSIS TABLE

CONDITION

POSSIBLE CAUSES

CORRECTION

NO AUDIO

1. Fuse faulty.

1. Check radio fuse in the Power Distribution
Center (PDC). Replace fuses, if required.

2. Radio/amplifier connector
faulty.

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

3. Wiring faulty.

3. Check for shorted or open wires. Repair wir-
ing, if required.

4. Radio/amplifier ground
faulty.

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

5. Radio/amplifier faulty.

5. Refer to appropriate Diagnostic Service Man-
ual.

6. Speakers faulty.

6. Replace speaker as necessary.

NO RADIO DISPLAY

1. Fuse faulty.

1. Check radio fuse in the Power Distribution
Center (PDC). Replace fuses, 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 Man-
ual.

CLOCK WILL NOT KEEP
SET TIME

1. Fuse faulty.

1. Check radio fuse in the Power Distribution
Center (PDC). Replace fuses, 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 Man-
ual.

8A - 2

AUDIO/VIDEO

AUDIO (Continued)

CONDITION

POSSIBLE CAUSES

CORRECTION

POOR RADIO RECEPTION

1. Antenna faulty.

1. Refer to Antenna 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.

3. Repair or replace ground strap as necessary.

4. Radio faulty.

4. Refer to appropriate Diagnostic Service Man-
ual.

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

1. Door trim panel loose or
missing fasteners.

1. Inspect door trim panel and correct as neces-
sary. Replace any missing fasteners.

2. Water shield loose or
misaligned.

2. Inspect water shield and adjust as required.

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 OPERA-
TION

1. 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 OPER-
ATION

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.

3. Allow temperature of vehicle interior to stabi-
lize and test operation.

4. Faulty CD player.

4. Refer to appropriate Diagnostic Service Man-
ual.

AMPLIFIER

DESCRIPTION

The audio system includes a separate audio power

amplifier. The amplifier is a seven channel unit and
is rated at 310 watts (RMS @ 10% THD). The ampli-
fier is located below the passenger seat.

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.

The amplifier receives audio signal inputs for

speaker channels from the radio, then sends ampli-
fied audio outputs through seven separate channels
with dedicated feed and return circuits to the indi-
vidual speakers.

The amplifier operates on battery current received

through a fuse in the Power Distribution Center
(PDC).

AUDIO/VIDEO

8A - 3

AUDIO (Continued)

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Remove passenger seat (Refer to 23 - BODY/

SEATS/SEAT - REMOVAL).

(3) Disconnect wire harness connectors (Fig. 1).

(4) Remove mounting fasteners and remove ampli-

fier.

INSTALLATION

(1) Position amplifier into place.
(2) Install mounting fasteners. Tighten to 12 N·m

(105 in. lbs.)

(3) Connect wire harness connectors.
(4) Install passenger seat (Refer to 23 - BODY/

SEATS/SEAT - INSTALLATION).

(5) Connect battery negative cable.

ANTENNA

DESCRIPTION

The antenna is integral to the windshield. The

antenna attaches to a single terminal wire that is
part of the antenna module.

OPERATION

The windshield antenna sends a signal to the

antenna module and it reduces any RFI received in
the signal.

DIAGNOSIS AND TESTING - ANTENNA

Any diagnosis of the Audio system should

begin with the use of a scan tool and the appro-
priate Diagnostic Service Manual.

Refer to the appropriate wiring information.

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 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 PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.

(1) Check the following electrical connections:
• Antenna lead connection at the radio

• Windshield antenna lead connector at front of

the instrument panel (Fig. 2).

• Three antenna amplifier connectors.
(2) Using an ohmmeter check for continuity at the

antenna module:

• Antenna module lead connector to the radio

antenna lead connector

• Antenna module lead connector to the connector

at the front of the instrument panel

• Antenna module bracket to a good ground
(3) Using an voltmeter, turn ignition switch to ON

position, check for battery voltage at the antenna
module connector.

(4) Move the vehicle outside and at least 10 meters

(35 feet) from the nearest building. Turn ignition
switch to the accessory position, turn radio ON, with
a very weak AM station ON. Very weak is defined as
a station the radio will not seek to. You should hear
background noise, but still be able to understand the
program material.

(a) Disconnect antenna lead connector at the

front of the instrument panel. There should be a
great drop in reception quality. If this occurs, the
antenna and antenna module are OK. Using an
ohmmeter, check for continuity of antenna. Place
one probe on antenna lead and the other at the
end of the antenna. If no continuity, repair using
Mopar rear window defogger repair kit or equiva-
lent (Refer to 8 - ELECTRICAL/HEATED GLASS/
WINDSHIELD

GRID

STANDARD

PROCEDURE). Check for continuity after repair. If
not OK, verify by connecting a 1.5 meters (5 ft.)
piece of wire to the terminal and holding it verti-
cal. Check for improvement in radio reception qual-
ity. If OK, replace windshield. If not OK, go to Step
b.

Fig. 1 AMPLIFIER

1 - MOUNTING FASTENER
2 - AMPLIFIER
3 - WIRE HARNESS CONNECTORS

8A - 4

AUDIO/VIDEO

AMPLIFIER (Continued)

(b) Connect antenna lead connector in the front

of the instrument panel. Disconnect connector at
antenna module. There should be a great drop in
reception quality. If not OK, replace antenna mod-
ule.

REMOVAL

The antenna is integral to the windshield. For ser-

vice procedures, (Refer to 23 - BODY/STATIONARY
GLASS/WINDSHIELD - REMOVAL).

ANTENNA MODULE

DESCRIPTION

The antenna module is an electromagnetic circuit

component designed to capture and enhance RF
(Radio Frequency) signals in both the AM and FM
broadcast bands. The antenna module is mounted
under the right front corner of the instrument panel.
The module is grounded through the mounting
bracket and fastener. The module has a one wire
electrical connector that connects to the integral
radio antenna, located in the windshield. There is an
electrical connector for battery voltage and a coax
cable connector.

OPERATION

The antenna module receives both AM and FM

radio signals supplied by the windshield integral
radio antenna system and selectively amplifies them.
The amplified signal is then sent through the coax
cable to the radio input.

DIAGNOSIS AND TESTING - ANTENNA
MODULE

Any diagnosis of the Audio system should

begin with the use of a scan tool and the appro-
priate Diagnostic Service Manual.

Refer to the appropriate wiring information.

WARNING:

DISABLE

THE

AIRBAG

SYSTEM

For diagnostic procedures, (Refer to 8 - ELECTRI-

CAL/AUDIO/ANTENNA - DIAGNOSIS AND TEST-
ING)

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Remove the Instrument panel (Refer to 23 -

BODY/INSTRUMENT

PANEL/INSTRUMENT

PANEL ASSEMBLY - REMOVAL).

(3) Remove mounting fasteners from module (Fig.

3).

Fig. 2 ANTENNA MODULE CONNECTION TO

WINDSHIELD

1 - WINDSHIELD
2 - ANTENNA MODULE CONNECTOR

Fig. 3 ANTENNA MODULE

1 - ANTENNA MODULE
2 - INSTRUMENT PANEL

AUDIO/VIDEO

8A - 5

ANTENNA (Continued)

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