Before DTC Troubleshooting

General Operation
Refer to the Owner’s Manual or the Navigation System Manual for the audio and visual system operating procedures.

Symptom Duplication
When the symptom can be duplicated, verify that it is not a characteristic of the system. Review the Owner’s Manual or the Navigation System Manual and compare it to a known-good vehicle (with the same software and database), under the same conditions. If the symptom is not the same as the known-good vehicle, follow the self-diagnostic procedures and the appropriate troubleshooting procedures.

When the symptom does not reappear or only reappears intermittently, ask the customer about the conditions when the symptom occurred.

• Always ask the customer to demonstrate the problem.
• Try to establish a possible user error or misunderstanding of the system.
• Try to establish if an outside interference may have been the cause.
• Vibration, temperature extremes, and moisture (dew, humidity) are factors that are difficult to duplicate.
• Inspect the vehicle for after-market electronic devices (vehicle locators, amps, radar detectors, etc.) that may be hidden.

When troubleshooting problems, ensure that the known-good vehicle is the same software version year and model as the vehicle being serviced. Mixing incompatible system components can delay the troubleshooting process by creating symptoms or issues unrelated to the original problem.

LCD Unit Limitations

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).
• If there is dirt on the LCD face, 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.

Global Navigation Satellite System (GNSS) Limitations
The GNSS signal is used for some functions about the audio unit. The GNSS 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 GNSS antenna is blocked by an object placed above it in the vehicle. The GNSS antenna requires a clear unobstructed view of the sky.
• When there is no satellite signal output (signal output is sometimes stopped for satellite servicing).

The accuracy of the GNSS is reduced during these instances:

• Metallic window tinting above the GNSS 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 control centers are experiencing problems.

Navigation Symptom Diagnosis
Certain circumstances and system limitations may result in occasional vehicle positioning errors. Some customers may think this indicates a problem with the navigation function when, in fact, the system is normal. Keep the following items in mind when interviewing customers about symptoms of the navigation function.

Self-Inertial Navigation Limitations
The limitations of the self-inertial portion of the navigation function (the gyro and the vehicle speed signal) can cause discrepancies between the vehicle’s actual position and the indicated vehicle’s position (GNSS vehicle position).

The following circumstances may cause vehicle positioning errors:

• Moving the vehicle with the OFF (LOCK) mode, such as by ferry or tow truck, or if the vehicle is spun on a turn table.
• Tyre slippage, changes in tyre rolling diameters, and some driving situations may cause discrepancies in travel distances. Examples of this include;
  －Continuous tyre slippage on a slippery surface
  －Driving with snow chains mounted
  －Abnormal tyre pressure
  －Incorrect tyre size
  －Frequent lane changes across a wide highway
  －Very bumpy roads
• Tolerances in the system and map inaccuracies sometimes limit how precisely the vehicle’s position is indicated. Examples of this include;
  －Driving on roads not shown on the map (map matching is not possible)
  －Driving on a road that winds in one direction, such as a loop bridge, an interchange, or a spiral parking garage
  －Driving on a road with a series of sharp hair-pin turns
  －Driving near a gradual highway exit or transition
  －Driving on one of two close parallel roads
  －Making many 90 degree turns

System Initialization
If the audio unit loses power (like the 12 volt battery was disconnected), the system requires initialization.

This initialization requires the following:

• Press and hold the AUDIO POWER (eng_4460341_1.0) button for at least 2 seconds. The audio unit exits the anti-theft mode. Or you can enter the 5-digit anti-theft code.
• GNSS initialization (may not be needed depending of the length of time the system was without power).
• Map matching aligns the GNSS to a location on the map.

GNSS Initialization
NOTE: You must park the vehicle outside with a clear view of the sky.

Depending on the length of time the 12 volt battery was disconnected, your system may require GNSS initialization.

NOTE:

• The average acquiring time is less than 10 minutes, but it can take as long as 45 minutes.
• If the system is still unable to acquire a signal, follow the instructions on the screen. If this screen appears again, check for hard error codes.

Map Matching
This part of the initialization matches the GNSS coordinates with a road on the map screen. To do this part of the procedure, make sure that the navigation system displays a map, and drive the vehicle on a mapped road shown on the map screen. Do not enter a destination at this time. When the name of the current road you are driving on appears at the upper of the screen, the entire procedure is complete. Your system is now ready to use.

Hands Free Telephone Symptom Diagnosis
The Hands Free Telephone (HFT) gives the user the convenience of hands free operation. It cannot control the mobile phone’s performance (call quality and signal strength). To avoid performance problems, do not put the mobile phone in a metal briefcase or in a purse under the seat.

If you want a complete description of this system (how to pair a mobile phone to the HFT and make and receive calls, and how to use simple voice tags), please refer to the Owner’s Manual.

Checking Mobile Phone Compatibility
The most important step in troubleshooting HFT issues is to identify the customer’s mobile phone model, the software version, and the cellular carrier that experiences the HFT problem. Not all phones with the Bluetooth feature and a hands-free profile are compatible with the Honda HFT system.

NOTE:

• The approved mobile phone list is constantly changing, so check them frequently.
• Mobile phones may be removed from the approved list if a software bug is discovered that makes the mobile phone incompatible.

Dropped Calls
Customers may perceive dropped calls as being an HFT fault, but most dropped calls are a result from mobile phone and phone carrier issues.

Always confirm with the customer if the number of dropped calls is higher while using the HFT as opposed to using the mobile phone only. Customers often confuse problems with their mobile phone or phone carrier as a problem with the HFT. The system cannot control or determine the following issues:

• Cellular connection quality
• Signal strength
• Cellular coverage
• Ambient weather conditions that affect cellular signals

When a customer complains about dropped calls, ask questions about when or where the calls are dropped, such as:

• Do you drive the same route on a regular basis?
• Does the call drop in the same location?
• Where do you keep your mobile phone?
• Have you compared the number of dropped calls using the HFT versus making calls from the handset?

There are many reasons for a dropped call that are not related to the HFT. Here are some causes for dropped calls:

• If the quantity of dropped calls is about the same when the customer uses the HFT versus the handset, the issue is likely due to the mobile phone or phone carrier.
• If a customer also notices that the calls tend to drop in the same areas, the HFT may be operating normally, but something about the area diminishes cellular coverage to a point where the call drops.
• Hills or mountains can block or interfere with cellular signals.
• High-rise buildings, bridges, or other large structures may block or interfere with cellular signals.
• Electrical storms, heavy rain, or overcast conditions interfere with signal strength.
• Placing the mobile phone in a purse, in a metal briefcase, under the seat, in the glove box, or in the trunk can all affect signal reception.
• There are coverage gaps in the mobile service. When driving, a call is typically passed from one tower to another. If the customer drives through an area where there is a coverage gap between towers, the call drops.

How to Check Error History (Audio Unit DTCs)
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 HOME button, SEEK DOWN (eng_255705_1.0) button, and the AUDIO POWER (eng_4460341_1.0) button until the Select Diagnosis Items menu screen is displayed.

3.When the Select Diagnosis Items menu appears, select the Self-Diagnosis Mode.

4.If the audio unit has hard error codes, the Error History icon turns yellow. When no hard error codes are stored, the icon is gray. To view the errors with their audio DTC, select the Error History icon.

5.Select the Hard Error icon in the Error History menu.

6.The Hard Error screen displays the following information by selecting the Date_Time icon:

• 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.