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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Symptom Troubleshooting [Entire Audio System] >> No.1 AF Noise Or Pop Noise At All Sources (Radio, Cd) [Entire Audio System] >> Diagnostic Procedure

Diagnostic Procedure

STEP INSPECTION ACTION
1
  • Inspect the vehicle battery voltage.
  • Is the vehicle battery voltage normal?

    Specification: 

  • Switch the ignition ON.: 11.5 V or more 
  • Idle: 12.5 V or more 
 Yes Go to the next step.
No Charge the battery, then go to the next step.
2
  • Turn the audio system to ON.
  • Is there any noise?
 Yes Go to the next step.
No The system is normal. Explain to the customer that the vehicle battery voltage was low.
3
  • Is any of the following after-market equipment installed? (Inspect especially near the antenna.)
    • Radar
    • Remote engine starter
    • Anti-theft device
    • Other
 Yes Go to the next step.
No Go to Step 5.
4
  • Remove the after-market equipment.
  • Turn the audio system to ON.
  • Is there any noise?
 Yes Go to the next step.
No The system is normal. The after-market electrical devices might make a noise.
5
  • Is there the noise from all speakers?
 Yes Go to Step 7.
No Go to the next step.
6
  • Inspect the suspect speaker.
  • Is the speaker normal?
 Yes Go to the next step.
No If there is any foreign material on the speaker: 
7
  • Attempt to duplicate the symptom on the other vehicle.
  • Is the noise better than the customer's vehicle?
 Yes Go to the next step.
No The system is normal. Explain the noise generation mechanism to the customer.
NOTE:
  • The noise may be heard depends on the operating speed of audio power and/or mode switch.
8
  • Switch the ignition OFF (LOCK).
  • Remove the audio unit.
  • Inspect the connection of the audio unit connector (24-pin) (for sound signal line).
  • Is the connector connected securely?
 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.

    (See AUDIO UNIT REMOVAL/INSTALLATION .)

    If the wiring harness-side connector is wrong: 

  • Repair or replace the pins and/or the connector.

    After treating either the above-mentioned, then go to the next step.
9
  • Is there any noise?
 Yes Go to the next step.
No The system is normal.
10
  • Inspect the ground condition of the antenna.
  • Is the ground condition normal?
 Yes Go to the next step.
No Repair or replace the ground. Go to the next step.
11
  • Is there any noise?
 Yes Replace the audio unit.
(See AUDIO UNIT REMOVAL/INSTALLATION .)
No The system is normal.
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