Reading and Clearing Diagnostic Trouble Codes
How to Troubleshoot the Audio System
The audio system has a self-diagnostic function.
NOTE:
- Not all self-diagnostic functions appear on all models.
- There 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). Turn the audio unit off.
2. 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.
3. When you are in the self-diagnostic mode, pressing a preset button starts the diagnostic mode that is assigned to that preset switch.
No. 3 button
Entire LCD lighting/light-out mode: Turns on/off the entire LCD to show the presence or absence of an LCD.
No. 4 button (With navigation)
Illumination level indication mode: Indicates the duty cycle for the illumination dimmer control of the gauge assembly.
Gauge dimmer control values:
Headlights off: OFF
Headlights on: 01 (max low) through 22 (max high)
No. 5 button
Vehicle speed pulse indication mode: Indicates the Vehicle speed pulse input.
AM/FM button (Push and hold 5 sec.)
Reception level check mode: Indicates the reception level. When entering the reception level check mode, the AM/FM button is used to change the antenna.
How to Obtain the Audio Unit Serial Number
NOTE: This procedure can only be done 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, then release. The audio unit displays the eight digit serial number (example 12345678). Use the eight digit serial number when using the interactive network (iN) to get the 5 digit anti-theft code.
Serial Number
4. To end the self-diagnostic function, turn the audio unit off or turn the ignition switch to LOCK (0).
NOTE: Any other diagnostic screens not shown are for factory use only.
Display Specifications
Preparation
- Park the vehicle outdoors where you get good radio reception.
- Tune to a powerful local FM radio station then write down the radio station number.
- Tune to a powerful local AM radio station then write down the radio station number.
Check the reception level
1. Enter the audio system self-diagnostic function.
2. Press and hold the AM/FM button for more than 5 seconds to enter the FM reception mode. The antenna amplifier is ON (A-SEL or TP is not displayed in the audio unit).
3. Tune to the FM radio station you wrote down in Preparation using the Tuning Knob, and note the decibel level of that station when you release the button.
4. Press and release the SCAN button to turn the antenna amplifier OFF (A-SEL or TP is now displayed in the audio unit).
5. Tune to the FM radio station you wrote down in Preparation using the Tuning Knob, and note the decibel level of the FM station.
6. Press and release the SCAN button to turn the antenna amplifier back ON (A-SEL or TP is not displayed in the audio unit).
7. Press and hold the AM/FM button for more than 5 seconds to enter the AM reception mode.
8. Tune to the AM radio station you wrote down in Preparation using the Tuning Knob, and note the decibel level of that station when you release the button.
9. Press and release the SCAN button to turn the antenna amplifier OFF (A-SEL or TP is now displayed in the audio unit).
10. Tune to the AM radio station you wrote down in Preparation using the Tuning Knob, and note the decibel level of the AM station.
11. Turn the ignition switch to LOCK (0) or turn the audio unit OFF to exit the test mode.
12. Compare your results to a known-good vehicle, (make sure it is the same year and trim level) in the same location and direction, and under the same environmental conditions.
To check FM reception, press and hold the AM/FM button for 5 seconds, then release. To check the AM band, press and hold the AM/FM button for another 5 seconds, then release. The reception level is displayed in decibels (db). You can check the reception with or without the antenna amplifier. Press the A. SEL button to toggle between turning the antenna amplifier on and off. You can change the station with the tuner button to check the reception level of any specific radio station. Compare this value with a known-good vehicle to check the audio unit reception.
Speaker Check Mode
NOTE:
- Not all self-diagnostic functions appear on all models.
- There may be other self-diagnostic functions that are for factory use only.
- In some cases, you may not be able to enter a mode even if the designated button in pressed. In that case, try again.
1. Turn the ignition switch to ON (II). Turn the audio unit off.
2. Push and hold the No. 1 and No. 3 buttons. While holding the buttons, push the PWR knob to on. Release the buttons and the speaker check mode begins. A tone test should sound from one speaker.
NOTE: Make sure the volume is set to a normal or sightly higher than normal volume and set the balance and fader to the center position.
3. Each time you press the SEEK/SKIP button, the test moves to the next speaker in the order listed.
Display Specifications
NOTE: Any other diagnostic screens are shown for factory use only.
*: Except 1 CD type Audio System
4. To end the speaker check mode, turn the audio unit off or turn the ignition switch to LOCK (0).
NOTE: The volume level remains at the same level when you did the speaker test. If you turned the volume up to do the speaker check mode test, return the volume to its normal level.
