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Acura CSX. Manual - part 635

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Special Tools Required

Individual Speaker Test

Sound Balance Test

23-253

Diagnostics CD 07AAZ-SDBA100

Do this test to identify a faulty speaker.

1. Insert the diagnostics CD (T/N: 07AAZ-SDBA100)

into the navigation unit or audio unit.

2. Play track No. 30 (steady 300 Hz tone) at a normal,

or slightly higher than normal, volume level.

3. Listen to each speaker for poor sound compared to

the other speakers. Use the audio unit’s fader and
balance settings to help isolate the channel with the
problem.

• If the sound quality produced by a specific

speaker is poor, substitute it with a known-good
speaker. If the poor sound quality continues, go
to the sound balance test.

• If the sound quality is OK, go to the sound

balance test.

Diagnostics CD 07AAZ-SDBA100

Perform this test to identify a faulty channel or speaker.

1. Insert the diagnostics CD (T/N: 07AAZ-SDBA100)

into the navigation unit or audio unit.

2. Confirm the bass and treble are set to the center

positions.

3. Play track No. 3 (pink noise) at a normal, or slightly

higher then normal, volume level.

4. A static type sound should be heard through all

speakers.

5. Insert the diagnostics CD (T/N: 07AAZ-SDBA100)

into the navigation unit or audio unit of a known-
good vehicle.

6. Set the bass and treble to the center position.

7. Play track No. 3 (pink noise) all the same level as

was played in step 3.

8. Compare the sounds made by the two vehicles.

• If the noise sounds made by the two vehicles are

very similar, go to the Frequency Sweep Test
(see page 23-254).

• If the sound does not have as much bass, check

the subwoofer and circuit.

• If the sound does not have enough hiss, check

the tweeters and their circuits.

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Special Tools Required

Frequency sweep

Sound judging

23-254

Audio System

Diagnostics CD 07AAZ-SDBA100

Do this test to find rattles or reverberation that may
cause a perception of poor sound quality.

1. Insert the diagnostics CD (T/N: 07AAZ-SDBA100)

into the navigation unit or audio unit.

2. Play track No. 13 (sweep from 500 Hz to 35 Hz) at a

normal, or slightly higher than normal, volume
level.

3. Listen to each speaker for poor sound quality or

reverberations caused by specific frequencies. Use
the voice-over to estimate the frequency that
causes the vibration. Use the audio unit’s fader and
balance settings to help isolate the channel with the
problem.

• If vibrations or poor sound quality are heard, go

to step 4.

• If no vibrations or poor sound quality are heard,

go to sound judging.

4. Choose the appropriate track from No. 14 to 25

(small range frequency sweep) or 26 to 53 (single
frequencies) to recreate the frequency that caused
the poor sound quality or vibration located in step
3: this aids in diagnosis of the cause.

NOTE: When you get to the track that recreates the
problem, select the repeat function on the
navigation unit or audio unit, this will help you
isolate the cause.

5. Replace or insulate the source of the vibrations or,

if the speaker is the source of the poor sound
quality, replace it.

Diagnostics CD 07AAZ-SDBA100

• Do this test to compare overall sound quality,

imaging, and dynamics between the client’s vehicle
and a known-good vehicle. Only use a vehicle of the
same model and trim level for this test.

• Make sure the vehicle is using only OEM speakers.

1. In the client’s vehicle, set the bass, treble, fader,

and balance settings to the client’s normal settings
that were written down before beginning testing.

2. Insert the diagnostics CD (T/N: 07AAZ-SDBA100)

into the navigation unit or audio unit.

3. Play tracks No. 7 to 12 (sound quality, midland,

dynamics, and imaging demonstration tracks) at a
normal, or slightly higher than normal, volume
level. Write down the volume setting being used.

4. Listen to areas of the track that stand out as being

either very clear, or poorer than other areas of the
track.

5. Insert the diagnostics CD (T/N: 07AAZ-SDBA100)

into the navigation unit or audio unit of a known-
good vehicle.

6. Play the tracks at the same volume level and the

same bass, treble, balance, and fader settings as
used in step 3 in the client’s vehicle.

7. Listen to the same area of the track that stood out

as being either very clear or poorer than other
areas of the track.

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Seek Stop Test

23-255

8. Compare the client’s vehicle’s sound quality results

to the known-good vehicle’s results.

• If the sound quality in the client’s vehicle is

comparable to the sound quality in the known-
good vehicle, then the client’s vehicle is
operating as designed.

• If the sound quality is not comparable, check

these items in order.
– Loose or improperly installed speakers or

other hardware that may become excited by
the vibrations generated by the speakers

– Poor power or ground to the stereo amplifier

(Type S model)

– Damaged speaker(s)
– Faulty amplifier
– Faulty navigation unit
– Faulty audio unit

Do this test to check the performance of the audio unit’s
AM and FM reception. Refer to symptom
troubleshooting: audio sound weak or distorted, or no
sound is heard from speakers (display is normal)
(see page 23-206) before continuing with this test.

NOTE:

• Window tint, aftermarket theft-recovery devices and

other aftermarket accessories may reduce radio
reception.

• Changes in cloud cover and other atmosphere

conditions will affect the ability of the navigation unit
or audio unit to receive radio signals.

1. Park the client’s vehicle in an open area away from

buildings or other obstructions.

2. Park a known-good vehicle (same year, model, and

trim level) next to the client’s vehicle, facing the
same direction.

3. Start the engine in the client’s vehicle, and turn on

the radio.

4. Set the FM receiver to 87.7 MHz.

5. Press the Seek

button and record the first station

that the navigation unit or audio unit locks onto.

6. Press the Seek

button repeatedly, and write

down each station that the navigation unit or audio
unit locks onto until the station recorded in step 5 is
reached again.

7. Set the AM receiver to 530 kHz.

8. Press the Seek

button, and record the first

station that the navigation unit or audio unit locks
on to.

9. Press the Seek

button repeatedly, and write

down each station that the navigation unit or audio
unit locks onto until the station recorded in step 8 is
reached again.

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Without navigation

23-256

Audio System

Audio Unit Removal/Installation

10. Turn the ignition switch to LOCK (0).

11. Start the engine in the known-good vehicle, and

then do steps 4 thru 10 on the known-good vehicle.

12. Compare the number of stations received in steps 6

and 9 in the client’s vehicle with the number of
stations received in the known-good vehicle.

• If the number of stations received is the same, or

within 10 %, the audio unit’s tuner performance
is OK. The problem may be atmospheric
conditions, multi path interference, or other
obstructions to the radio signal.

• If the customer’s vehicle receives fewer stations

by at least 10 %, go to step 2 of poor AM or FM
radio reception of interference, with navigation
(see page 23-196), without navigation (see page
23-199).

SRS components are located in this area. Review the
SRS component location (see page 24-11).
Also review the precautions and procedures (see page
24-13) in the SRS section before doing repairs or
service.

NOTE:

• Put on gloves to protect your hands.
• Take care not to scratch the dashboard and related

parts.

• Lay a workshop towel under the parts when working

on them to protect the face panel from scratches or
other damage.

• Do not work in a dusty or dirty place.
• Discharge static electricity from your body before and

during the work.

• Do not touch the circuit board(s) with your bare

hands.

• Do not work with dirty hands.
• Be careful not to fold the flat plate cable.
• Do not touch the terminal connector of the flat plate

cable with your bare hands (If you have touched it,
wipe it off thoroughly.).

• Eject all the discs before removing the audio unit to

prevent damaging the CD/DVD player’s load
mechanism.

• If you are replacing the audio unit, write down the

audio presets (if possible), and enter them into the
new audio unit.

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