How to Troubleshoot the Audio System
NOTE: Refer to How to Troubleshoot the Navigation System for information about the audio-navigation unit.
How to Recognize Audio Unit and Audio-Navigation Unit (Display audio type)
There are two kinds of audio units with a 7-inch display unit depending on the vehicle model. These units exist as an audio unit (without navigation) and an audio-navigation unit (with navigation), and appear the same. However, the audio-navigation unit displays a Honda Globe screen after displaying a Honda logo screen* every time when you turn the vehicle to the ACCESSORY mode.

*: When the vehicle is turned to the ACCESSORY or ON mode.
Forced Rebooting of Audio Unit (Display audio type)
If the system is frozen, and the screen does not respond, you can attempt rebooting the audio unit by pressing and holding the AUDIO POWER (enu_4460341_1.0) button for 5 seconds. When the function is effective, the confirmation screen appears.
Anti-Theft Feature (With audio system theft protection)
The audio unit has an anti-theft protection circuit. When one of the following occurs, the unit enters the anti-theft mode:
Disconnecting the 12 volt battery terminal.
Disconnecting audio unit connector A (24P).
Removing the ?B line's fuses.

After the service, reconnect power to the audio unit, and turn the vehicle to the ON mode. There are two ways to exit the anti-theft mode:
Press and hold the AUDIO POWER (enu_4460341_1.0) button for at least 2 seconds. The audio unit automatically exits the anti-theft mode. If the audio unit does not exit anti-theft mode, turn the vehicle to the OFF (LOCK) mode then the ON mode (if possible, start the engine), and try to release the anti-theft several times.
Enter the 5-digit anti-theft code. If the input of code fails 10 times in a row, the screen is locked for 60 minutes.

When the audio unit is installed in another vehicle (same Year/Model/Trim), like in cases where a known-good unit was substituted for testing, do the Anti-Theft Skip mode in the System Diagnostic Mode (display audio type), or do the Anti-Theft Temporary Cancellation in the System Diagnostic Mode (color audio type). These mode will release the anti-theft code for 150 seconds.
Global Positioning System (GPS) Limitations (Display audio type)
The GPS signal is used for some functions about the audio unit. The GPS cannot detect the vehicle's position or elevation during the following instances:
For the first 5 to 10 minutes after reconnecting the 12 volt battery (this process can take as long as 45 minutes).
When the satellite signals are blocked by tall buildings, mountains, tunnels, large trees, inside parking structures or large trucks.
When the GPS antenna is blocked by metallic window tinting or by an object placed above it in the vehicle. The GPS antenna requires a clear unobstructed view of the sky.
When there is no satellite signal output (signal output is sometimes stopped for satellite servicing).
When the satellite signals are blocked by the operation of some electronic aftermarket accessories including, but not limited to non-OEM in-dash entertainment units (amp, CD players/changers, radar detectors, theft recovery systems, etc.) and cell phones placed near the navigation system.

The accuracy of the GPS is reduced during these instances:
Metallic window tinting above the GPS antenna.
When only three or fewer satellite signals are received (Four satellite signals are required for accurate positioning).
When driving near high tension power lines.
When the satellite signals are blocked by the operation of some electronic aftermarket accessories including, but not limited to non-OEM in-dash entertainment units (amp, CD players/changers, radar detectors, theft recovery systems, etc.) and cell phones placed near the navigation system.
When the satellite control centers are experiencing problems.
LCD Unit Limitations (Display audio type)
The center display unit is touch sensitive. Touch the display directly to select items on the screen.
Heavy gloves, fingernails or pens cannot be used on the touch panel.
In cold temperatures, the display may stay dark for the first minute until it warms up.
When the display is too hot because of direct summer sunlight, it remains dark until the temperature drops (you may see an error message displayed stating this fact).
Fingerprints on the screen may be noticeable. Clean the screen with a soft, damp cloth. You may use a mild cleaner intended for eye glasses or computer screens. To avoid scratching the panel, do not rub too hard or use abrasive cleaners or shop towels.
How to Check Error History (Audio DTCs) (Display audio type)
NOTE: The audio DTCs cannot be retrieved with the HDS.

The Error History feature is to record intermittent audio/navigation issues that occur while the customer is using the system. Sometimes the customer complaint cannot be duplicated. The error history may record the information needed to diagnose the problem. To check the error history:

1.
Turn the vehicle to the ON mode.

2.
Press and hold the PHONE button, the DISPLAY MODE (enu_1740914_1.0) button, and the AUDIO POWER (enu_4460341_1.0) button until the Select Diagnosis Items menu screen is displayed:

NOTE: The buttons needs to be pressed together simultaneously.
Displaying Select Diagnosis Items Menu Screen

3.
When the Select Diagnosis Items menu appears, select the Self-Diagnosis Mode.
4.
When the audio unit has hard error codes, the Error History icon (A) appears yellow. When no hard error codes are stored, the icon appears gray. To view the errors with their navigation DTC, select the Error History icon.
5.
Select the Hard Error icon in the Error History menu.

NOTE: The Soft Error feature is for factory use only.
6.
The Hard Error screen displays the following information by selecting the Date/Time icon (A):
The date and time when the error occurred. Swipe the screen to check the next items.
The audio DTC for the error.
A brief description of the audio DTC.

NOTE: The Save feature is for factory use only.

7.
Use the audio DTC Troubleshooting table to troubleshoot the error. Select the Return icon to exit the Error History main menu.
How to Clear Error History
NOTE: The audio DTCs cannot be deleted with the HDS.

8.
Select the Clear icon in the Hard Error. The confirmation screen appears.

9.
Select the Yes icon. All Hard Error histories are cleared. Select the Return icon to exit the Error History.