Honda Accord 2008 Manual page 2517

07/11/02 09:49:47 61TA0000_230_0073
Audio System
Symptom Troubleshooting (cont'd)
Volume does not change
NOTE:
• Check the vehicle battery condition first.
• Check the connectors for poor connections or loose
terminals.
• Set the fader and balance positions to the center.
1. Turn the ignition switch to ON (II).
2. Turn on the audio unit and check for sound in each
mode (AM, FM, XM, and CD).
Is the sound normal?
−
YES Go to step 3.
NO − Go to Sound Quality Diagnosis (see page
23-103) or no sound is heard from speaker(s) with
premium audio system (see page 23-63), without
premium audio system (see page 23-68).
3. Operate the volume knob to see if the volume
changes.
Does the volume change?
−
YES Operation is normal.
NO − Substitute a known-good audio unit with
navigation system (see page 23-109), without
navigation system (see page 23-111) and recheck. If
the symptom/indication goes away, replace the
audio unit with navigation system (see page
23-109), without navigation system (see page
23-111).
23-72 23-72
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Volume does not increase with speed
NOTE:
• Check the vehicle battery condition first.
• Check the connectors for poor connections or loose
terminals.
1. Test-drive the vehicle at highway speeds and
monitor if the volume increases.
Does the volume increase?
YES − Intermittent failure, the system is OK at this
time.
−
NO Go to step 2.
2. Verify SVC mode setting in audio unit sound
adjustment set-up.
Is the SV C set to of f ?
YES − Change setting to MID and retest.
NO − Go to step 3.
3. Do the self-diagnostic function for the vehicle
speed pulse indication (see page 23-46).
Does self -diagnostic f unction indicate a V SP
signal?
−
YES Substitute a known-good audio unit with
navigation system (see page 23-109), without
navigation system (see page 23-111) and retest. If
the symptom/indication goes away, replace the
original audio unit with navigation system
(see page 23-109), without navigation system
(see page 23-111).
NO −
• 1 CD type: Go to step 4.
• Except 1 CD type: Check for B-CAN DTCs
(communication BUS Line Error) with the HDS
and go to the indicated DTC's troubleshooting. If
no B-CAN DTCs or communication bus line
errors are found, substitute a known-good audio
unit with navigation system (see page 23-109),
without navigation system (see page 23-111) and
recheck. If the symptom goes away, replace the
original audio unit with navigation system
(see page 23-109), without navigation system
(see page 23-111).
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