415-00-2 Audio System — General Information 415-00-2
DIAGNOSIS AND TESTING
Audio System
Inspection and Verification
1. Verify the customer concern.
2. Make sure you understand the customer
concern; does the concern arise during start-
up, with the vehicle in motion, do ambient
conditions effect, alter or induce the
concern?
Visual Inspection Chart
Mechanical
Electrical
• Audio unit damage
• Cassette player
jammed, not loading
• Compact disc (CD)
player jammed, not
loading
• Audio entertainment
module damage
• Radio
receiver/cassette
player power amplifier
damage
• Antenna/alignment
• Speakers/water
damage
• Speakers/incorrectly
mounted
• Speaker cones
damaged
• Foreign material
contacting speaker
cone
• Accessory installation
• Trim reso-
nance/incorrectly fit-
ted trim.
• Fuse 2 (10 A)
• Fuse 19 (10 A)
• Wiring harness
• Loose or corroded
electrical connectors
• Over stressed wiring,
internally dam-
aged/chaffing of
wires.
3. Visually inspect for obvious signs of
mechanical or electrical damage.
4. If an obvious cause for an observed or
reported concern is found, correct the cause
(if possible) before proceeding to the next
step.
5. If the cause is not visually evident, verify the
symptom and refer to the Symptom Chart.
Symptom Chart
Condition
Possible Sources
Action
• The audio unit is inoperative /
does not operate correctly.
• Fuse(s).
• Ground circuit.
• Power circuit.
• Audio unit.
• Go to Pinpoint Test A.
• The display is blank-radio re-
ceiver / cassette player operates
• Audio unit.
• INSTALL a new audio unit.
• Poor reception AM only, FM
only or both AM/FM
• Antenna.
• Antenna connections.
• Suppression equipment.
• Audio unit.
• Go to Pinpoint Test B.
E6747 EN 07/2001 2002 Bantam
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