Page 689 of 2543

Problem No.
Noise Noise produced by vibration or shock while driving. 30
Noise produced when engine starts. 31
Antenna Antenna±related. 32
ANTI±THEFT SYSTEM Troubleshooting for ANTI±THEFT SYSTEM 33
HOW TO USE DIAGNOSTIC CHART
Is tape player operating
Is ACC applied to radio?Tape player faulty.
Check if GND (wire harness side)
to radio is OK.
Radio faulty.Radio assembly faulty.
Check if CIG & RAD fuse is OK.Replace fuse.
Is ACC applied to radio?
Is ACC applied to tape player?
Is ACC applied to power amplifier?
ACC wire harness faulty?
NO POWER COMING INRadio
(1) Audio system type and symbol used.
HINT: Confirm the applicable type of audio system.
(2) Symbol for type of audio system the question applies to.
HINT: If the audio system type is not applicable, proceed to next question below.
(3) Junction without black circle.
HINT: Proceed to next question below.
(4) Junction with black circle.
HINT: Proceed to question for applicable audio system type.
(5) HINT: Select question for applicable audio system type.
± BODY ELECTRICAL SYSTEMAUDIO SYSTEMBE±87
Page 690 of 2543
1 Radio NO POWER COMING IN
Is tape player operating normally?
Is ACC applied to power amplifier?
Replace fuse.Check if RAD No. 2 fuse is OK?
Power amplifier faulty.
GND faulty.
Power amplifier faulty.
ACC wire harness faulty.Is ACC applied to radio assembly?
GND faulty.
ACC wire harness faulty.
Check if GND (wire harness side) to
radio is OK?
Radio assembly faulty.
Radio assembly faulty.
Check if GND (wire harness side)
to power amplifier is OK?
BE±88± BODY ELECTRICAL SYSTEMAUDIO SYSTEM
Page 691 of 2543
2 Radio POWER COMING IN, BUT RADIO NOT OPERATING
Is tape player operating normally?
Speaker wire harness faulty?
Speaker faulty?
Radio assembly faulty?
Hissing sound from speaker?
Radio assembly faulty. Recheck system after repair.
Radio assembly faulty.
Go to No. 32
Is power for the antenna
being output from the
radio or radio assembly?Radio assembly
faulty.
Is power for the antenna
being output from the
power amplifier?Power amplifier
faulty.
Is there continuity in speaker wire
harness
Temporarily install another speaker
Functions OK?
Power amplifier faulty. Recheck system
after repair.
± BODY ELECTRICAL SYSTEMAUDIO SYSTEMBE±89
Page 692 of 2543
3 Radio NOISE PRESENT BUT AM±FM NOT OPERATING
Is power for the antenna being output from
the radio assembly?
Is power for the antenna being output
from the power amplifier?
Radio assembly faulty.
Radio assembly faulty.
Radio assembly faulty.
Power amplifier faulty.
Power amplifier faulty. Recheck system after repair.
Radio assembly faulty. Recheck system after repair.
Go to No. 32
Is tape player operating normally?
Hissing sound from speaker?
BE±90± BODY ELECTRICAL SYSTEMAUDIO SYSTEM
Page 693 of 2543
Temporarily install another speaker.
Functions OK?
Radio assembly faulty. Recheck system
after repair.
Is tape player operating normally?
Is this produced by non±functioning speaker?
Is there continuity in speaker wire harness?
Radio assembly faulty.
Radio assembly faulty.
Radio assembly faulty.
Speaker wire harness faulty.
Speaker faulty.
Power amplifier faulty. Recheck system after repair.
RadioEITHER SPEAKER DOES NOT WORK
± BODY ELECTRICAL SYSTEMAUDIO SYSTEMBE±91
Page 694 of 2543
w/ Power Amplifier
Check if RAD No. 2 fuse is OK?
Is there continuity in wire harness? (Radio
receiver to power amplifier)
Temporarily install another woofer speaker.
Functions OK?
Temporarily install another power amplifier.
Functions OK?
RadioWOOFER SPEAKER DOES NOT WORK
Replace fuse.
Radio receiver assembly faulty.
GND faulty.
+B wire harness faulty.
Check the radio receiver assembly.
Wire harness Faulty.
Woofer speaker faulty.
Is tape player operating normally?
Check if GND to power amplifier is OK?
Is +B applied to power amplifier?
Is AMP applied to power amplifier?
Is there continuity in speaker wire harness?Speaker wire harness faulty.
Radio receiver assembly faulty.
Power amplifier faulty.
BE±92± BODY ELECTRICAL SYSTEMAUDIO SYSTEM
Page 695 of 2543
Poor signals, poor location.
Radio assembly faulty.
Power amplifier faulty.
Go to No. 32.
Is tape player operating normally?Radio assembly faulty?
Speaker faulty.
Radio assembly faulty.
Hissing sound from speaker?Power amplifier faulty. Recheck system after repair.
Radio assembly faulty. Recheck system after repair.
Problem with radio wave signals or
location? (See SYSTEM DESCRIPTION)
Are both AM and FM defective?
Is power for the antenna being output
from the radio assembly.
Is power for the antenna being output
from the power amplifier?
Temporarily install another speaker.
Functions OK?
RadioEITHER AM OR FM DOES NOT WORK, RECEPTION
POOR (VOLUME FAINT), FEW PRESET TUNING BANDS
± BODY ELECTRICAL SYSTEMAUDIO SYSTEMBE±93
Page 696 of 2543
RadioSOUND QUALITY POOR
Is sound quality bad in
certain area only?Poor signals, poor
location.
Is power for the antenna
being output from the
radio assembly?Radio assembly
faulty.
Is power for the antenna
being output from the
power amplifier?Power amplifier
faulty.
Temporarily install another speaker.
Functions OK?
Is sound quality always bad?
Radio assembly faulty.Is tape player operating normally?
Radio assembly or power amplifier faulty.
Is tape player operating normally?
Go to No. 32
Radio assembly faulty.
Is speaker properly installed?Install properly.
Speaker faulty.
Radio assembly faulty.
Radio assembly or power amplifier faulty. Recheck system after repair.
BE±94± BODY ELECTRICAL SYSTEMAUDIO SYSTEM