Mazda CX 7. Manual — part 362
SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]
09-03D–17
09-03D
End Of Sie
NO.9 AUDIO SYSTEM ILLUMINATION DOES NOT ILLUMINATE AT ALL[ENTIRE AUDIO SYSTEM]
id0903e2825200
Diagnostic procedure
End Of Sie
NO.10 LCD DOES NOT DISPLAY AT ALL[ENTIRE AUDIO SYSTEM]
id0903e2825300
Diagnostic procedure
End Of Sie
9
Audio system illumination does not illuminate at all/Possible DTC: 09:Er20, 21:Er19
Troubleshooting hints
• Poor connection of audio unit connector, terminal damage
• Audio unit malfunction
• Burnt fuse (TNS signal)
• Open or short circuit in TNS signal wiring harness
• Center panel malfunction
STEP
INSPECTION
ACTION
1
• Are all illumination on the audio unit turned
OFF?
Yes
Go to the next step.
No
Replace the center panel.
2
• Turn the ignition switch to the LOCK position.
• Inspect the fuse (ILLUMI).
• Is the fuse normal?
Yes
Go to the Step 4.
No
Go to the next step.
3
• Turn the ignition switch to the LOCK position.
• Disconnect the audio unit connector (24-pin)
and inspect the continuity between the audio
unit wiring harness-side connector terminal
E (TNS) and the ground.
• Is there continuity?
Yes
Repair or replace the short circuit in the suspect wiring
harness. After repair the harness, replace with the
appropriate standard fuse.
No
Go to the next step.
4
• Inspect the connection of the audio unit
connector (24-pin).
• Inspect both the audio unit and wiring
harness-side connector terminal E for poor
connection (such as damaged/pulled-out
pins, corrosion).
• Are all the pins normal?
Yes
Go to the next step.
No
If poor connection of audio unit connector:
• Securely connect the audio unit connector.
If the audio unit side connector is wrong:
• Replace the audio unit.
If the wiring harness-side connector is wrong:
• Repair or replace the pins and/or the connector.
5
• Connect the audio unit connector (24-pin).
• Turn the ignition switch to the ACC position.
• Inspect the voltage at the audio unit
connector terminal E (TNS).
• Is the voltage B+ when the light switch is
turned to the TNS position?
Yes
Replace the audio unit.
No
Repair or replace the suspect wiring harness (TNS signal).
10
LCD does not display at all/Possible DTC: 09:Er20, 21:Er19
Troubleshooting hints
• Audio unit malfunction
• Information display malfunction
STEP
INSPECTION
ACTION
1
• Turn the audio unit to ON.
• Press both POWER ON/OFF and SEEK UP
buttons for 0.2 seconds at the same time.
• Does the LCD display properly?
Yes
Go to the next step.
No
Replace the information display.
2
• Press either CLC or SET/INFO button on the
information display.
• Does the beep sound?
Yes
Replace the audio unit.
No
Replace both audio unit and information display.
(CAN communication malfunction)
1871-1U-06B(09-03D).fm 17 ページ 2006年3月15日 水曜日 午前11時45分
SYMPTOM TROUBLESHOOTING [RADIO]
09-03E–1
09-03E
09-03E SYMPTOM TROUBLESHOOTING [RADIO]
FOREWORD[RADIO] . . . . . . . . . . . . . . . 09-03E–1
Troubleshooting Index . . . . . . . . . . . . . 09-03E–1
Quick Diagnostic Chart (Radio) . . . . . . 09-03E–2
CONFIRMATION STEP 1: RECEPTION
CONDITION SYMPTOM (EXAMPLE)
[RADIO] . . . . . . . . . . . . . . . . . . . . . . . . . 09-03E–2
CONFIRMATION STEP 2: ANTENNA
SYSTEM SYMPTOM (EXAMPLE)
[RADIO] . . . . . . . . . . . . . . . . . . . . . . . . . 09-03E–3
CONFIRMATION STEP 3: ANTENNA
SYSTEM SIMPLE INSPECTION
[RADIO] . . . . . . . . . . . . . . . . . . . . . . . . . 09-03E–3
NO.1 NO RADIO RECEPTION
(AM/FM)/NO OR LOW VOLUME
[RADIO] . . . . . . . . . . . . . . . . . . . . . . . . . 09-03E–3
NO.2 NOISE FROM RADIO (AM ONLY)
[RADIO] . . . . . . . . . . . . . . . . . . . . . . . . . 09-03E–5
NO.3 NOISE FROM RADIO (FM ONLY)
[RADIO] . . . . . . . . . . . . . . . . . . . . . . . . . 09-03E–6
NO.4 CANNOT TUNE (SEEK DOES
NOT STOP)[RADIO] . . . . . . . . . . . . . . . . 09-03E–8
NO.5 CANNOT PRESET (PRESET
FUNCTION DOES NOT OPERATE)
[RADIO] . . . . . . . . . . . . . . . . . . . . . . . . . 09-03E–9
NO.6 RECEPTION FREQUENCY OF
RADIO SLIPS[RADIO] . . . . . . . . . . . . . . 09-03E–9
REFERENCE[RADIO] . . . . . . . . . . . . . . . 09-03E–10
1. Multipath Noise . . . . . . . . . . . . . . . . . 09-03E–10
2. Flutter/Skip Noise . . . . . . . . . . . . . . . 09-03E–10
3. Stereo and Monaural Receptions . . . 09-03E–10
Measures in Audio System . . . . . . . . . . 09-03E–10
Effect Setting of Separation Control and
High Tone Control . . . . . . . . . . . . . . . . 09-03E–10
End of Toc
WM: AUDIO UNIT
FOREWORD[RADIO]
id0903e3803900
Note
• l If the case location, time, and broadcasting station etc. can be specified through interview with the
customer, there is the possibility that the signal reception environment is the cause of the problem.
• Perform confirmation of symptom and evaluation under conditions that customer reported (location, time,
broadcasting station etc.). If not possible, perform it under equivalent conditions.
• Before inspection or repair, record the broadcasting stations that customer preset and reset them
accordingly after the inspection or repair. Adjust the clock too.
Troubleshooting Index
No.
Symptom
Possible DTC
1
No radio reception (AM/FM)/No or low volume
09:Er20, 09:Er22
2
Noise from radio (AM only)
09:Er22
3
Noise from radio (FM only)
09:Er22
4
Cannot tune (SEEK does not stop)
09:Er20, 09:Er22
5
Cannot preset (preset function does not operate)
21:Er19
6
Reception frequency of radio slips
09:Er22
1871-1U-06B(09-03E).fm 1 ページ 2006年3月16日 木曜日 午後4時10分
SYMPTOM TROUBLESHOOTING [RADIO]
09-03E–2
Quick Diagnostic Chart (Radio)
End Of Sie
CONFIRMATION STEP 1: RECEPTION CONDITION SYMPTOM (EXAMPLE)[RADIO]
id0903e3804000
End Of Sie
1
2
3
4
5
6
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Troubleshooting item
Possible factor
Jamming from aftermarket electronic equipment (two-way radio, navigation system, mobile phone, etc)
Audio unit
Antenna plug poor connection
Antenna feeder
Electronic jamming from outside, or inferior condition of broadcasting station radio wave
Antenna rod not installed
Noise from electrical system on vehicle (e.g. fuel pump)
Battery
Charging system
Antenna installation loosened
Center panel
No r
adio reception (AM/FM)/No or lo
w v
olume
Noise from r
adio (AM only)
Noise from r
adio (FM only)
Cannot tune (SEEK does not stop)
Cannot preset (preset function does not oper
ate)
Reception frequency of r
adio slips
X: Applicable
acxuuw00000947
Symptom
Antenna signal condition
Source
Only a buzzing sound from
the speakers
• There is no broadcasting wave.
• Signals from antenna to audio unit are not
transmitted.
• Electric noise caused by the operation of
internal circuit from audio unit itself
• Atmosphere noise
A buzzing or crunching sound
and normal sound produced
at the same time from the
speakers
• Though signals are transmitted from
antenna to audio unit, electric noise from
other sources is larger.
• Electrical noise caused by operation of
electrical component on vehicle
• Electrical noise from high tension wire,
transformer substation (factory), electrical
feeder line (street car), or motorcycle.
A thumping sound and
normal sound produced at the
same time from the speakers
(FM only)
• Noise occurs due to radio wave
environment at specific places (e.g. in
valleys between buildings). Noise varies
when own vehicle or surrounding vehicles
moves. (FM only)
• Interference between direct and reflected
waves of FM signals causes noise
(Multipass noise).
1871-1U-06B(09-03E).fm 2 ページ 2006年3月16日 木曜日 午後4時10分
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