How to Troubleshoot the Audio System

How to Troubleshoot the Audio System

The audio system has a self-diagnostic function.

NOTE:

- Not all self-diagnostic functions appear on all models.

- They may be other self-diagnostic functions that are for factory use only.

How to Use the Audio System Self-diagnostic Function

1. Turn the ignition switch to ON (II).

2. Enter the anti-theft code.

3. Push, and hold the No. 1 and No. 6 buttons. While holding the buttons, push the PWR knob to on. Release the buttons, and the self-diagnostic function begins.

4. The word DIAG appears on the subdisplay.






How to exit the self-diagnosis mode

Turn the audio power off or the ignition switch to LOCK (0).

How to Obtain the Audio Unit Serial Number

NOTE: This procedure can only when the power has been disconnected from the audio unit, and the audio unit displays CODE.

With the audio unit switched off, push and hold the preset buttons No. 1, No. 6, and the PWR knob.

The audio unit displays the letter U with the first four digits of the serial number (example U1234).

The display then changes and displays the letter L and the last four digits of the serial number (example L5678).

Use all eight digits as the serial number when using the interactive network iN to get the 4 digit anti-theft code.






LCD lighting mode

When you press the No. 3 button, the entire LCD turns on to show if any LCDs are dead (off).






LCD lights-out mode

When you press the No. 4 button, the entire LCD turns off to show if any LCDs are stuck on.






LCD back-up light lighting/lights-out mode

Press the No. 4 button to turn off the entire LCD, then press and hold the DISC/AUX button for 5 seconds. The LCD back-up lights should come on. When you press and hold the DISC/AUX button for 5 seconds again, and the LCD back-up lights should go off.






Climate control system communication check mode

When you press the No. 5 button, the self-diagnostic checks the climate control unit communication line.






Audio amplifier communication check mode

When you press the No. 6 button, the self-diagnostic checks the audio amplifier communication line.






Active Noise Cancellation (ANC) system check mode

Active noise cancellation can be turned ON or OFF, and you can check the current status. The active noise cancellation switches ON and OFF with every push of the No. 1 button. If "--" appears on the display, use this check mode to check for loose wires or poor connections at the active noise cancellation control unit connector (16P).






How to check the active noise cancellation system in this check mode

- With the engine stopped, and while in DIAG mode, turn the ANC ON to OFF by pressing the No. 1 button. A low-frequency hum (50 Hz) should sound for about a minute.
- If the hum does not sound, check for an open in the wire between the active noise cancellation unit and the audio unit.

- If the hum does not sound for a minute, check for an open in the wire between active noise cancellation unit and the microphone.

- Start the engine while the hum is sounding. The hum should stop. If the hum does not stop, check for an open in the wire (NEP line) between the active noise cancellation unit and the PCM.

- Enter the DIAG mode with the engine running (900 rpm), apply the brake pedal and shift to D position, turn the ANC ON to ANC OFF by pressing the No. 1 button on the audio unit, then turn the ANC OFF to ANC ON. After about 3 seconds, the active noise cancellation system should activate. (NOTE: When any of the doors are opened, the function stops.)