Question about Sony CDX-MP40 CD Player

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When i turn off the ignition and on again the unit loses its radio presets. Why is this and how can i rectify it?

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Hello jim_read!
please check your wiring, there is generally a red and a orange one, one is for permanent 12v the other for ignition, since your cdp does not get any 12volt after ignition turned off it can't keep memory.
regards

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  1. Turn on radio. The radio display shows "SAFE".
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The following is the procedure to re-activate the radio if the display shows "SAFE". It is important that the procedure be followed in the correct order.

  1. Turn on radio. The radio display shows "SAFE".
  2. Press the FM1/2 and DX buttons simultaneously and hold until "1000" shows on the display. Release the buttons. Do NOT press these buttons again, otherwise the radio will consider "1000" to be the code.
  3. Use Preset buttons 1 ... 4 to enter the four-digit code number from your radio card. Preset button 1 corresponds to the first digit, Preset button 2 corresponds to the second digit, etc. Each press of the button increments the number by 1.
  4. Once the code shown on the display is correct, press the FM1/2 and DX buttons simultaneously and hold until the word "SAFE" appears in the display, then release the buttons.
  5. The radio should unlock and be usable shortly afterwards.
  6. If an incorrect code is entered, the word "SAFE" appears, first flashing and then continuously. You can repeat the above steps to unlock the radio once more, the number of attempts will be shown in the display. If an incorrect code is entered again, you radio will be locked for about one hour. After one hour - the radio must stay on and the key must remain in the ignition lock - if the display goes out, the you can repeat the above procedure to unlock again. The cycle - two attempts, one hour lock-up - still applies.
  7. If you lose your radio code, contact your Audi dealer.

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I brought my son a 1997 Audi, and the radio is in safe mode, can anyonr help me get the code?


  1. Turn on radio. The radio display shows "SAFE".
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Visual Inspection Chart Mechanical Electrical
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  • Central junction box (CJB) fuse:
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Audio Unit Self-Diagnostic Mode
NOTE: To enter the speaker walk-around test or audio unit self-diagnostic mode, the audio unit must be turned on and in radio tuner mode (AM/FM).
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  1. To exit the audio unit self-diagnostic mode, turn the ignition switch or the audio unit off.
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  1. The audio unit self-diagnostic mode has five tests available:
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    • Preset button 3 = SIGNAL TEST. This test measures the average strength at the current tuner setting.
    • NOTE: Always DOCUMENT, CLEAR and CARRY OUT the audio unit on-demand self-test again.
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You don´t connect correctly the wire for the constant power suply that´s why the memories don´t stand still,always be a yellow one you need to connect to a direct power suply,good luck

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1 Answer

I have a 1999 Audi A6.


Entering anti-theft code The following is the procedure to re-activate the radio if the display shows "SAFE". It is important that the procedure be followed in the correct order.
  1. Turn on radio. The radio display shows "SAFE".
  2. Press the P.Scan and RBDS buttons simultaneously and hold until "1000" shows on the display. Release the buttons. Do NOT press these buttons again, otherwise the radio will consider "1000" to be the code.
  3. Use Preset buttons 1 ... 4 to enter the four-digit code number from your radio card. Preset button 1 corresponds to the first digit, Preset button 2 corresponds to the second digit, etc. Each press of the button increments the number by 1.
  4. Once the code shown on the display is correct, press the P.Scan and RBDS buttons simultaneously and hold until the word "SAFE" appears in the display, then release the buttons.
  5. The radio should unlock and be usable shortly afterwards.
  6. If an incorrect code is entered, the word "SAFE" appears, first flashing and then continuously. You can repeat the above steps to unlock the radio once more, the number of attempts will be shown in the display. If an incorrect code is entered again, you radio will be locked for about one hour. After one hour - the radio must stay on and the key must remain in the ignition lock - if the display goes out, the you can repeat the above procedure to unlock again. The cycle - two attempts, one hour lock-up - still applies.
  7. If you lose your radio code, contact your Audi dealer.

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1 Answer

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On the adapter cable if there is a separate cable for power connect the positive directly to battery power as opposed to ignition. The memory resides on the xmdirect2 module not on the head unit.

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