How to Troubleshoot the Navigation System (Display Audio)

How to Troubleshoot the Navigation System

General Operation

Refer to the Navigation Manual for the navigation system operating procedures.

How to Recognize Audio unit and Audio-Navigation Unit

There are two kinds of 7-inch display audio units depending on vehicle model. These units exist as an audio unit (without navigation) and an audio-navigation unit (with navigation), appear the same, but 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. If the unit does not displayed any screen, according to failure of the unit or the vehicle, remove the unit, and check for SD card is built in, the unit can be recognized as an audio-navigation unit.

Anti-Theft Feature

The audio-navigation unit has an anti-theft protection circuit. When one of the following occurs, the unit enters the anti-theft mode:

	Disconnecting the battery.
	Disconnecting audio-navigation unit connector A (24P).
	Removing the No. A22 (10 A) fuse from the under-hood fuse/relay box.

After the service, reconnect power to the audio-navigation unit, and press the engine start/stop button to select the ON mode. There are two ways to exit the anti-theft mode:

	Press and hold the POWER () button for at least 2 seconds. The audio-navigation unit automatically exits the anti-theft mode. If the audio-navigation unit does not exit anti-theft mode, like in cases where a known-good unit was substituted for testing, enter the 5-digit anti-theft code.
	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 replacing the audio-navigation unit, be sure to give the customer the new anti-theft security code.

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 system when, in fact, the system is normal. Keep the following items in mind when interviewing customers about symptoms of the navigation system.

Self-Inertial Navigation Limitations

The limitations of the self-inertial portion of the navigation system (the gyro and the vehicle speed signal) can cause discrepancies between the vehicle's actual position and the indicated vehicle's position (GPS vehicle position).

The following circumstances may cause vehicle positioning errors:

Moving the vehicle with the engine stopped and the vehicle stopped, such as by ferry or tow truck, or if the vehicle is spun on a turn table.

Tire slippage, changes in tire rolling diameters, and some driving situations may cause discrepancies in travel distances. Examples of this include;

?	Continuous tire slippage on a slippery surface
?	Driving with snow chains mounted
?	Abnormal tire pressure
?	Incorrect tire 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

Global Positioning System (GPS) Limitations

The GPS cannot detect the vehicle's position or elevation during the following instances:

	For the first 5 to 10 minutes after reconnecting the 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

The LCD display built into the audio-navigation 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.

Symptom Duplication

When the symptom can be duplicated, verify that it is not a characteristic of the system. Review 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 possible user error or misunderstanding of the system.
	Try to establish if 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 navigation system problems, ensure that the known-good vehicle is the same software version year and model as the vehicle being serviced. Mixing incompatible navigation systems or other system components can delay the troubleshooting process by creating symptoms or issues unrelated to the original problem.

SD Card Module Service Precautions

The audio-navigation unit and the SD card module cannot be substituted separately for testing purposes. You can substitute a combined audio-navigation unit and SD card module with a known-good combined audio-navigation unit and SD card module. When the audio-navigation unit and the SD card module are connected to a vehicle, and powered up for the first time, the audio-navigation unit and the SD card module go through a mating process where the SD card module writes the audio-navigation unit's serial number to its memory. The audio-navigation unit and the SD card module are available separately.

When you get a replacement audio-navigation unit, it does not come with an SD card module, but the unit is able to mate one time to an SD card module. When you connect the audio-navigation unit to the SD card module and power it up for the first time, the two components are mated. Once the audio-navigation unit is mated, it does not accept an SD card module that is already mated to another audio-navigation unit. It does accept a new SD card module.

The SD card module is removable from the audio-navigation unit. If the audio-navigation unit is replaced, install the original SD card module into the new audio-navigation unit. When you transfer the SD card module, the map data, the system data, the application program, and all the customer's settings are transferred.

The SD card module is able to mate more than once, allowing you to transfer the SD card module with the customer's information to a new audio-navigation unit. The SD card module must mate to a new audio-navigation unit. It cannot mate to an audio-navigation unit that has been mated to another SD card module.

A new audio-navigation unit is defined as a unit that has not been mated to an SD card module. A new unit may be new or remanufactured.

Audio-Navigation Unit	SD Card	Result
New	New	OK
Original	New	OK
New	Original	OK
Original	An audio-navigation unit mated to a different SD card module	NG
An audio-navigation unit mated to a different SD card module	Original	NG

System Initialization

If the navigation system loses power (like the battery was disconnected), the navigation system requires initialization. Once completed, your system is ready to use.

This initialization requires the following:

	Exiting the anti-theft mode (Press and hold the POWER () button for at least 2 seconds or enter the 5-digit anti-theft code).
	GPS initialization (may not be needed depending of the length of time the system was without power).
	Map matching (aligns the GPS to a location on the map).

GPS Initialization

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

Depending on the length of time the battery was disconnected, your system may require GPS initialization. If it does, the CSF (Cold Start Fix) screen appears.

If this procedure is not necessary, the system proceeds directly to the Disclaimer screen. During initialization, the system searches for all available GPS satellites, and obtains their orbital information. Park the vehicle out in the open with a clear view of the sky for this procedure.

If the navigation system finds the satellites properly, the CSF screen changes to the Disclaimer screen. If within 10 minutes the system fails to locate a sufficient number of satellites to locate your position, the confirmation screen appears.

If this screen appears, turn off the engine, then restart the vehicle and move it to a different location. If the Disclaimer screen appears, the GPS initialization is complete.

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 Navigation DTCs or refer to symptom troubleshooting.
	Skip a CSF screen by pressing the DAY/NIGHT () button and the MENU button at the same time and you can move to the Disclaimer screen.

Map Matching

This part of the initialization matches the GPS 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 bottom of the screen, the entire procedure is complete. Your system is now ready to use.

Ordering Update Navigation Software

If the customer wants a yearly navigation software, update, there are two ways to purchase one. They can either call 1-888-628-6275, or order on-line at www.hondanavi.com.

How to Check Error History (Navigation DTCs)

NOTE: The navigation 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 POWER () button, the MENU button, and the DAY/NIGHT () button.

Displaying Select Diagnosis Items Menu Screen

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

When the audio-navigation 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.

NOTE: The display differs depending on the equipments and specifications.

5.	Select the Hard Error icon in the Error History menu. NOTE: The Soft Error feature is for factory use only.

The Hard Error screen displays the following information by selecting the Date_Time icon (A):

	The date and time when the error occurred.
	The navigation DTC for the error.
	A brief description of the navigation DTC.

NOTE: The Save feature is for factory use only.

7.	Use the audio DTC Troubleshooting table to troubleshoot the error. Press the BACK button to exit the Error History main menu.

How to Clear Error History

NOTE: The navigation 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. The system returns to the Error History menu automatically.