Part One
How to Troubleshoot the Navigation System
General Operation
Refer to the navigation system manual for the navigation system operating procedures.
Anti-Theft Feature
The navigation system has a coded theft protection circuit. Make sure you have the anti-theft security code before:
- Disconnecting the battery.
- Disconnecting the navigation unit connector A (8P).
- Removing the No. 5 (7.5 A) fuse from the driver's under-dash fuse/relay box.
After service, reconnect power to the navigation unit, and turn the ignition switch to ON (II). Enter the 4-digit anti-theft security code. If the code card is lost or unavailable, you can get the code from the iN using the navigation system serial number. The system serial number can easily be obtained without removing the navigation unit.
To get the serial number and the code, do this:
- Press and hold the MENU, MAP/GUIDE, and CANCEL buttons at the same time.
- At the select diagnosis items screen, select Detail Information & Settings, select Unit Check, then ECU Info. The system runs a brief diagnosis, then the navigation unit serial number is displayed at the bottom of the screen.
- Use the Anti-theft code inquiry option on the iN to look up the 4-digit anti-theft code. The iN may display more than one code for a given serial number. This is because serial numbers are not unique. You may have to try more than one 4-digit code. If no code is shown, or if the code(s) given do not work in the navigation unit, contact the Automobile Warranty department. Alternatively, you can find the serial number on the upper label which is located on the navigation unit in the trunk.
When replacing the navigation unit, be sure to give the client the new anti-theft security code.
Symptom Diagnosis
Certain circumstances and system limitations will result in occasional vehicle positioning errors. Some client's 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 client's about symptoms of the navigation system.
Self-Inertial Navigation Limitations
The limitations of the self-inertial portion of the navigation system (the yaw rate sensor and the vehicle speed pulse) 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
- Continuous driving on a straight or gently curving 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 (radio, CD players/changers, radar detectors and theft recovery systems) 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 less 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.
Muting Logic
Whenever the navigation system is giving guidance, the front speakers are muted. When the voice control system is being used, all of the speakers are muted. If the AcuraLink or HandsFreeLink is in use, the voice control system is unavailable and a message appears on screen.
LCD Unit Limitations
NOTE: The screen is not touch sensitive. Use the interface dial and buttons to select items on the screen.
- In cold temperatures, the display may stay dark for the first 2 or 3 minutes until it warms up.
- When the display is too hot because of direct summer sunlight, it will remain dark until the temperature drops (you may see an error message displayed stating this fact).
- When the humidity is high and the interior temperature is low, the display may appear cloudy. The display will clear up after some use.
- 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, follow the self-diagnostic procedures and the appropriate troubleshooting procedures.
- When the symptom does not reappear or only reappears intermittently, ask the client about the conditions when the symptom occurred.
- Always ask the client 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.
- Try to duplication the symptom under the same conditions the client experienced.
- 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.
NOTICE
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 DVDs or other system components can delay the troubleshooting process by creating symptoms or issues causing effects unrelated to the original problem.
Service Precautions
- If you need to replace the navigation unit, you can back-up the navigation data and transfer it to a new navigation unit. See Save users memory.
- When the battery is disconnected, the internal GPS clock is reset to 0:00. The clock resets to the correct time after the system finishes GPS initialization.
- Before disconnecting the battery, make sure you have the anti-theft codes for the audio system and the navigation system. Also obtain any PGM-FI or transmission DTCs and freeze frame data (which are lost when the PCM loses power).
- After reconnecting the battery, you have to wait to get the initial signal from the satellite. It will take from 10 to 45 minutes.
- Adjust the setup clock settings (time zone and daylight savings) in the navigation system.
- Before returning the vehicle to the client, enter the anti-theft codes for the audio system and the navigation system.
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:
- Entering the 4-digit anti-theft security code to unlock the system
- GPS initialization (may not be needed depending of the length of time the system was without power)
- Map matching to align the GPS to a location on the map
Entering the Security Code
Any time the navigation system loses power, you need to enter the 4-digit anti-theft code on the navigation system display. This 4-digit code is located on a small code card that was given to the client. Enter the 4-digit code, than select Done.
If the navigation system anti-theft code is missing, get the serial number from the navigation unit and use the iN to look it up. You do not need to remove the navigation unit. See Anti-Theft Feature.
When replacing the navigation unit or audio unit, make sure you give the client the new anti-theft security code.
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 following 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. During this procedure the vehicle should be out in the open with a clear view of the sky.
If the navigation system finds the satellites properly, this box clears, and changes to the Disclaimer screen. If within 10 minutes the system fails to locate a sufficient number of satellites to locate your position, the following screen appears.
It 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, go to GPS icon is white or not shown troubleshooting Symptom Troubleshooting.
- Skip to a CSF screen by pushing the MENU and INFO buttons at the same time and you can move to a System Links 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.