Navigation System Acura TL III

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Anti-theft Feature

The navigation system and audio unit have a coded theft protection circuit. Be sure to get the customer's anti-theft security codes before

1. Disconnecting the battery.
2. Disconnecting the navigation unit 8P connector.
3. Removing the No. 7 (7.5 A) fuse from the under-dash fuse/relay box.

After service, reconnect power to the navigation unit, and turn the ignition switch ON (II). Enter the 4-digit anti-theft security code, then select "Done".

If the code cannot be found, use the interactive Network ( i N) to look it up. You can view the serial number in one of the Navi ECU diagnostic screen (see UNIT CHECK ). Alternatively, you will need the serial number from the navigation unit in the trunk. It is on a label on the underside of the unit.

When replacing the navigation unit, be sure to give the customer the new anti-theft security code.

Symptom Diagnosis

Certain circumstances and system limitations will 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 yaw rate sensor and the vehicle speed signal) can cause some discrepancies between the vehicle's actual position and the indicated vehicle's position (GPS vehicle position).

The following circumstances may cause vehicle positioning errors

1. 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.
2. 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
3. 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 during the following instances

1. For the first 5 to 10 minutes after reconnecting the battery (This process can take as long as 45 minutes).
2. When the satellite signals are blocked by tall buildings, mountains, tunnels, large trees, inside parking structures or large trucks.
3. 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.
4. When there is no satellite signal output (Signal output is sometimes stopped for satellite servicing).
5. 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 GPS is reduced during these instances

1. Metallic window tinting above the GPS antenna.
2. When only two satellite signals can be received (Three satellite signals are required for accurate positioning).
3. When driving near high tension power lines.
4. 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.
5. 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 HandsFreeLink is in use, the voice control system is unavailable.

LCD Display Unit Limitations

1. In cold temperatures, the display may stay dark for the first 2 or 3 minutes until it warms up.
2. 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).
3. When the humidity is high and the interior temperature is low, the display may appear cloudy. The display will clear up after some use.
4. Fingerprints on the touch panel may sometimes be noticeable because of the panel's low-reflection coating. 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.
5. The touch panel consists of a touch sensitive resistive memberance covering the display. Unlike previous systems, you must actually "touch" the display to activate it. Never use hard or sharp implements to operate the screen because you risk damaging the sensing membrane. If a touch "switch" does not function immediately, shift your finger slightly, and touch it again.

Note. The display is unaffected by sunlight, as in previous displays.

Symptom Duplication

1. When the symptom can be duplicated, verify that it is not a characteristic of the system. Review the navigation information manual and compare it to a known-good vehicle (with the same software and database), under the same conditions. If not the same, follow the self-diagnostic procedures and the appropriate troubleshooting procedures.
2. When the symptom does not reappear or only reappears intermittently, ask the customer about the conditions when the symptom occurred. 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. Try to duplication the symptom under the same conditions the customer was experiencing. 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.

Service Precautions

1. If the navigation unit needs to be replaced, inform the customer that personal information in the navigation system will be lost. If possible, have the customer record their personal information before the unit is replaced.
2. Before disconnecting the battery, make sure you have the anti-theft codes for the radio and the navigation system, and write down the XM radio channel presets. Also obtain any PGM-FI or transmission DTCs and freeze frame date (which will be lost when the ECM/PCM loses power).
3. When the battery is disconnected, the internal GPS clock is reset to "0:00". The clock will reset to the correct time after the system finishes GPS initialization.
4. After reconnecting the battery, you have to wait to get the initial signal from the satellite. It will take from 10 to 45 minutes.
5. Before returning the vehicle to the customer, enter the radio and navigation anti-theft security code, then enter the customer's XM radio channel presets, and set the clock.

System Initialization

If for any reason, you lose power to the navigation system (like the battery was disconnected). The navigation system will require initialization. Once completed, your system will be ready to use.

This initialization requires the following

1. Entry of the 4-digit anti-theft security code to "unlock" the system
2. GPS initialization (may not be needed depending of the length of time the system was without power)
3. Map matching to align the GPS to a location on the map

Entering Security Code

The navigation system and audio unit have a coded theft protection circuit. Be sure to get the customer's anti-theft security codes before

1. Disconnecting the battery
2. Disconnecting the navigation unit connector C (8P)
3. Removing the No. 7 (7.5 A) fuse from the under-dash fuse/relay box

After service, reconnect power to the navigation unit, and turn the ignition switch ON (II). Enter the 4-digit anti-theft security code, then select "Done".

When replacing the navigation unit or audio unit, be sure to give the customer the new anti-theft security code.

GPS Initialization

Depending on the length of time the battery was disconnected, your system may require GPS initialization. If it does, the following screen appears

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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.

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After 30 minutes with this screen displayed, turn off the engine, then restart the vehicle. If you now see the Disclaimer screen, 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 troubleshooting for the GPS icon is white (see GPS ICON IS WHITE OR NOT SHOWN ).

Map Matching

This part of the initialization matches the GPS coordinates with a road on the map screen. To perform this part of the procedure, ensure that the navigation system is displaying 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.

Obtaining A Navigation DVD

If the Navigation DVD is lost or damaged, or you need a yearly updated DVD, you have 2 ways to purchase one. You can either call (888) 549-3798, or order on-line at www.acura.com.

Both methods require a credit card. The DVD for this model has an orange label, and cannot be ordered through the parts system. The following DVDs will not work in this navigation system

1. Earlier model navigation DVDs (black label)
2. Map software programs manufactured by other companies
3. DVD movies, or DVDs containing audio recordings

Update DVDs are available for purchase usually in the fall of each year. They may contain the following

1. Enhanced maps and points of interest (POI) coverage
2. Fixes for minor software bugs
3. Additional features

Note. Updating is optional, and there is no program to provide free DVDs containing yearly mapping updates.

Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING CHART

Overview

The navigation system is a highly-sophisticated, hybrid locating system that uses satellites and a map database to show you where you are and to help guide you to a desired destination.

The navigation system receives signals from the global positioning system (GPS), a network of 24 satellites in orbit around the earth. By receiving signals from several of these satellites, the navigation system can determine the latitude, longitude, and elevation of the vehicle. In addition, signals from the system's yaw rate sensor and the ECM/PCM (vehicle speed pulse) enable the system to keep track of the vehicle's direction and speed of travel.

This hybrid system has advantages over a system that is either entirely self-contained or one that relies totally on the GPS. For example, the self-contained portion of the system can keep track of vehicle position even when satellite signals cannot be received. When the navigation system is on, the GPS can keep track of the vehicle position even when the vehicle is transported by ferry.

The navigation system applies all location, direction, and speed information to maps and calculates a route to the destination entered. As you drive to that destination, the system provides both visual and audio guidance.

This navigation system also has voice recognition that allows voice control of most of the navigation functions. The Talk and BACK buttons on the steering wheel activate the voice control. The voice control also allows control of the audio and climate control.

The illumination signal is used by the navigation unit to automatically switch the display between Night and Day brightness modes when display is set to Auto. When the instrument panel brightness control is set to full brightness (MAX button pressed), the navigation system stays in the Day mode, even with the headlights on.

The GA-NET II bus passes information back and forth between the display panel control unit, the navigation unit, and the audio system. The information passed on this bus are touch button commands, and audio and climate control settings directed by the navigation unit. The audio unit uses the bus to control the XM-receiver or other accessories.

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Navigation Function

The navigation system is composed of the navigation unit, the ECM/PCM (vehicle speed signal), the GPS antenna, microphone, voice control switch, audio unit and the display panel control unit.

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Vehicle Speed Pulse

The vehicle speed pulse is sent by the ECM/PCM. The ECM/PCM receives a signal from the countershaft speed sensor, then processes the signal and transmits it to the speedometer and other systems.

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Charge Signal

The ECM/PCM sends a charge signal to the navigation unit via F-CAN. A thermister inside the navigation unit monitors the units internal temperature. This information combined with charge signal determines the control units internal cooling fan operation.

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Yaw Rate-Lateral Acceleration Sensor

The yaw rate-lateral acceleration sensor (located in the navigation unit) detects the direction change (angular speed) of the vehicle. The sensor is an oscillation gyro built into the navigation unit.

Sensor Element Structure

The sensor element is shaped like a tuning fork, and it consists of the piezoelectric parts, the metal block, and the support pin. There are four piezoelectric parts: one to drive the oscillators, one to monitor and maintain the oscillation at a regular frequency, and two to detect angular velocity. The two oscillators, which have a 90-degree twist in the center, are connected at the bottom by the metal block and supported by the support pin. A detection piezoelectric part is attached to the top of each oscillator. The driving piezoelectric part is attached to the bottom of one oscillator, and the monitoring piezoelectric part is attached to the bottom of the other oscillator.

Oscillation Gyro Principles

The piezoelectric parts have "electric/mechanical transfer characteristics". They bend vertically when voltage is applied to both sides of the parts, and voltage is generated between both sides of the piezoelectoric parts when they are bent by an external force. The oscillation gyro functions by utilizing this characteristic of the piezoelectric parts and "Coriolis force". (Coriolis force deflects moving objects as a result of the earth's rotation.) In the oscillation gyro, this force moves the sensor element when angular velocity is applied.

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1. The driving piezoelectric part oscillates the oscillator by repeatedly bending and returning when an AC voltage of 6 kHz is applied to the part. The monitoring-side oscillator resonates because it is connected to the driving-side oscillator by the metal block.
2. The monitoring piezoelectric part bends in proportion to the oscillation and outputs voltage (the monitor signal). The navigation unit control circuit controls the drive signal to stabilize the monitor signal.
3. When the vehicle is stopped, the detecting piezoelectric parts oscillate right and left with the oscillators, but no signal is output because the parts are not bent (no angular force)
4. When the vehicle turns to the right, the sensor element moves in a circular motion with the right oscillator bending forward and the left oscillator bending rearward. The amount of forward/rearward bend varies according to the angular velocity of the vehicle.
5. The detecting piezoelectric parts output voltage (the yaw rate signal) according to the amount of bend. The amount of vehicle direction change is determined by measuring this voltage.

Global Positioning System (GPS)

The global positioning system (GPS) enables the navigation system to determine the current position of the vehicle by utilizing the signals transmitted from the satellites in orbit around the earth. The satellites transmit the satellite identification signal, orbit information, transmission time signal, and other information. When the GPS receiver receives a signal from three or more satellites simultaneously, it calculates the current position of the vehicle based on the distance to each satellite and the satellite's position in its respective orbit.

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Precision of GPS

The precision of the GPS varies according to the number of satellites from which signals are received and the view of the sky. The precision is indicated by the color of the GPS icon shown on the display.

PRECISION OF GPS TABLE

GPS Antenna

The GPS antenna amplifies and transmits the signals received from the satellites to the GPS receiver.

GPS Receiver

The GPS receiver is built in the navigation unit. It calculates the vehicle position by receiving the signal from the GPS antenna. The vehicle position and signal reception condition is transmitted from the GPS receiver to the navigation control unit to adjust vehicle position.

Navigation Unit

The navigation unit calculates the vehicle position and guides you to the destination. The unit performs map matching correction, GPS correction, and distance tuning. It also controls the menu functions and the DVD-ROM drive, and interprets voice commands. With control of all these items, the navigation unit makes the navigation picture signal, then it transmits the signal to the display panel control unit and audio driving instructions to the audio unit.

Calculation of Vehicle Position

The navigation unit calculates the vehicle position (the driving direction and the current position) by receiving the directional change signals from the yaw rate sensor and the travel distance signals from vehicle speed pulse (VSP) signal of the ECM/PCM.

Map Matching Tuning

The map matching tuning is accomplished by indicating the vehicle position on the roads on the map. The map data transmitted from the DVD-ROM is checked against the vehicle position data, and the vehicle position is indicated on the nearest road. Map matching tuning does not occur when the vehicle travels on a road not shown on the map, or when the vehicle position is far away from a road on the map.

GPS Tuning

The GPS tuning is accomplished by indicating the vehicle position as the GPS's vehicle position. The navigation unit compares its calculated vehicle position data with the GPS vehicle position data. If there is large difference between the two, the indicated vehicle position is adjusted to the GPS vehicle position.

Distance Tuning

The distance tuning reduces the difference between the travel distance signal from the VSP and the distance data on the map. The navigation unit compares its calculated vehicle position data with the GPS vehicle position data. The navigation unit then decreases the tuning value when the vehicle position is always ahead of the GPS vehicle position, and it increases the tuning value when the vehicle position is always behind the GPS vehicle position.

Route Guidance

The navigation unit can calculate different routes to a selected destination. You have five options

1. Direct Route-Calculate a route that is the most direct.
2. Easy Route-Calculate a route that minimizes the number of turns needed.
3. Minimize Freeways-Calculate a route that avoids freeway travel. If that is not possible, keep the amount of freeway travel to a minimum. This is not selectable (button grayed out) for trips greater than 100 miles.
4. Minimize Toll Roads-Calculate a route that avoids, or minimizes travel on toll roads. This is not selectable (button grayed out) for trips greater than 100 miles.
5. Maximize Freeways-Calculate a route that uses freeways as much as possible.

Audio Guidance

The navigation unit transmits audio driving instructions before entering an intersection or passing a junction. The audio instructions come through the audio unit to the front speakers.

Note. The front speakers are muted whenever the navigation system is giving guidance commands, and all of the speakers when the voice control system is being used.

Muting Signal Logic

All muting signals are passed through the GA-Net II bus. The audio unit determines the muting logic and what audio source has priority to use the speakers.

If the HandsFreeLink (HFL) is in use, a signal is passed through the audio unit to tell the navigation unit that the HFL is in use. The navigation unit temporarily disables the voice control system and suppresses voice guidance commands. In addition, the audio unit suppresses the output from the radio, XM radio, disc player, or other audio accessories. When the navigation system sends out a voice guidance command, the front speakers are muted, and the navigation voice is heard from the center speaker. When the voice control system is in use, all of the speakers are muted, and the navigation voice prompts are heard from the center speaker. Signals sent on the bus also control turning on the external amplifier when the audio unit is off.

DVD-ROM

The map and points of interest data (including all scale rates) are stored in the DVD-ROM. The map data includes

1. Road distances, road widths, speed limits, traffic regulations, passing time at junction, distances to junctions, and the driving instructions for audio guidance.
2. Latitude and longitude GPS.

Audio Unit

The audio unit receives the voice guidance instructions from the navigation unit and transmits the instructions through the center speaker even when the audio system is in use.

Note. If the navigation volume is turned OFF, this feature is disabled.

Display Unit

The display unit uses a liquid crystal display (LCD). The LCD is a 8-inch-diagonal, thin film transistor (TFT), stripe type with 336,960 picture elements, The color film and fluorescent light are laid out on the back of the liquid crystal film. The touch sensor on the front of the LCD consists of a touch sensitive resistive membrane with an infinite number of possible touch locations. To maintain compatibility with earlier display units the sensing locations are confined to a grid of 20 vertical and 9 horizontal touch locations. This produces 180 total sensing zones. The display unit transmits the signal from each operation key and the touch switches to the navigation unit over the GA-Net bus.

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Microphone (Mic)

Receives voice commands and transmits them to the navigation unit or HFL control unit for interpretation.

Talk Button

Activates the voice control system in the navigation unit to accept voice commands.

BACK Button

Returns the display to the previous screen (similar function as the CANCEL button).

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Glossary

The following is a glossary of terms pertaining to the Voice Recognition Navigation System.

VOICE RECOGNITION NAVIGATION SYSTEM - ITEM DEFINITION CHART

System Function Diagram

This diagram shows the features of the navigation system starting at the center and working outward in layers. The navigation program starts at "Key ON", and then displays the globe screen. Once the disclaimer screen is acknowledged, the next shaded portions of the diagram become active. However, some functions of the INFO and SET UP buttons, and all functions of the AUDIO and A/C buttons can be accessed immediately after the globe screen (white).

This items above the map screen show various methods to begin a destination, such as "Go Home". Once you begin driving to your destination, you are provided with map/voice guidance, routing cautions (in unverified areas), and a directions list. While driving to your destination, use the voice control system as much as possible to interact with the navigation, audio, and climate control systems.

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Diagnostic Function Diagram

This diagram shows the diagnostic slice of the System Function Diagram. It has the diagnostic features of the navigation system starting at the center and working outward in layers. The diagnostic starts at "Key ON", and then displays the Diagnostic Main Menu (Select Diagnosis items) after

Starting the vehicle with the SCS connector plugged in to the navigation service check connector (see FORCED STARTING OF DISPLAY ) to get to the System Links screen, then selecting Return.

Simultaneously pressing and holding the MENU, MAP/GUIDE, and CANCEL buttons.

The diagram shows the available menu choices starting at the button left and moving clockwise.

You will find a detailed explanation of each feature on the given page numbers.

In most cases, do not clear or change settings in any diagnostic screen unless instructed to do so in the explanation or by the factory. If the factory supplies you with a PCMCIA card to place in the PC Card slot, then the features specified in the diagram with "Card" are available. The section labeled "For Developer Only" contains items for factory use. For instance, the factory might ask you for information from System History.

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Diagnostic Test: Navi System Link

Note. Always check the connectors for poor connections or loose terminals. Before troubleshooting, make sure you have the navigation system anti-theft code.

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1. Check the No. 7 (7.5 A) fuse and No. 32 (7.5 A) fuse in the under-dash fuse/relay box, and reinstall the fuses if they are OK. Are the fuses OK? YES- Go to step 2. NO- Replace the fuse and recheck.
2. Turn the ignition switch to ACC (I).
3. Operate the radio and listen to the audio. Can audio be heard? YES- Go to step 4. NO- Check the ACC circuit.
4. Turn the ignition switch ON (II).
5. Measure the voltage between body ground and navigation unit connector C (8P) terminals No. 1 and No. 2 individually. Is there battery voltage? YES- Go to step 6. NO- If the +B wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation unit. If the ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation unit.
6. Turn the ignition switch OFF.
7. Disconnect the navigation unit connector C (8P).
8. Check for continuity between navigation unit connector C (8P) terminal No. 4 and body ground. Is there continuity? YES- Go to step 9. NO- Repair open in the wire between the navigation unit and body ground (G604).
9. Reconnect the navigation unit connector C (8P).
10. Perform the forced starting of display (see «FORCED STARTING OF DISPLAY»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). Is the diagnosis menu of the picture diagnosis displayed? YES- Go into the Diagnostic mode and use the "Navi System Link" diagnostic (see «NAVI SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ) to check the links. NO- Go to step 11.
11. Shield the display panel from the sun with your hand, and check that the display is back lit (only back light is ON.) Can you see the back light? YES- Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ) and retest. If the problem is still present, replace the display panel control unit (see «DISPLAY PANEL CONTROL UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#display-panel-control-system) ). NO- Go to step 12.
12. Turn the ignition switch ON (II).
13. Measure the voltage between body ground and display panel control unit connector A (14P) terminal No. 5 and No. 6 individually. Is there battery voltage? YES- Replace the display panel control unit. NO- If the +B wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the display panel control unit connector A (14P). If the ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the display panel control unit connector A (14P).

Diagnostic Test: Monitor Check

Note. Always check the connectors for poor connections or loose terminals. Before troubleshooting, make sure you have the navigation system and radio anti-theft codes.

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1. Go into the Diagnostic mode and use "RGB Color" diagnostic under "Monitor Check" (see «F-CAN SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__f-can-system-link) ). Are the red, green, and blue colored circles shown? YES- The system is OK at this time. NO- Go to step 2.
2. Turn the ignition switch to OFF.
3. Disconnect the navigation unit connector A (20P) and display panel control unit connector E (22P).
4. Check for loose terminals at navigation unit connector A (20P) and display panel control unit connector E (22P). Are there loose terminals? YES- Repair the terminal. NO- Go to step 5.
5. Check for continuity between the appropriate terminals of navigation unit connector A (20P) and display panel control unit connector E (22P) based on the missing color(s). MISSING COLOR SPECIFICATION TABLE Missing color or input Navigation unit connector A (20P) Display panel control unit connector E (22P) Wire color Blue A11 E11 YEL Green A2 E2 RED Red A1 E1 WHT Is there continuity? YES- Go to step 6. NO- There is an open in the circuit between the display panel control unit and the navigation unit. Check for poor connections or loose terminals at the display panel control unit and navigation unit. If a poor connection or loose terminal is found, replace the affected shielded harness.
6. Check for continuity between the appropriate terminals of display panel control unit connector E (22P) based on the missing color(s). MISSING COLOR SPECIFICATION TABLE Missing color Display panel control unit connector E (22P) terminal Display panel control unit connector E (22P) terminals Blue E11 A1, E13 Green E2 A1, E13 Red E1 A1, E13 Is there continuity? YES- There is a short to body ground in the circuit between the display panel control unit and the navigation unit. Replace the affected shielded harness. NO- Check for poor connections or loose terminals at the navigation unit and recheck. If a poor connection or loose terminal is found, replace the shielded harness. If no poor connections or loose terminals are found, substitute a known-good navigation unit and recheck. If the problem is gone, replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ). If not replace the display panel control unit (see «DISPLAY PANEL CONTROL UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#display-panel-control-system) ).

Note. Always compare the screen image to a known-good vehicle. If the screen looks the same, inform the customer that it is characteristic. Always check the connectors for poor connections or loose terminals. Before troubleshooting, make sure you have the navigation system and radio anti-theft codes.

1. Check for electronic aftermarket accessories (possibly hidden) mounted near the display unit or the navigation unit. Are there any electronic accessories? YES- Disable the accessories, and recheck. NO- Go to step 2.
2. Start up the navigation picture. Is the picture scrolling horizontally (left to right or right to left)? YES- Check for an open or short to ground in the C SIG wire from navigation unit connector A (20P) terminal No. 12 to display panel control unit connector E (22P) terminal No. 12. Also check for a short to ground between display panel control unit connector E (22P) terminal No. 12 and terminal No. 13. NO- Go to step 3.
3. Go into the Diagnostic mode and use "RGB Color" diagnostic under Monitor Check (see «F-CAN SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__f-can-system-link) ). Is the picture missing a red, green or blue color? YES- Do troubleshooting for the picture is missing a color or tone (see «PICTURE IS MISSING A COLOR OR TONE»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). NO- Go to step 4.
4. Turn the ignition switch OFF.
5. Substitute a known-good display panel control unit (see «DISPLAY PANEL CONTROL UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#display-panel-control-system) ), and recheck. Is the picture OK? YES- Check for loose connections, then replace the original display panel control unit (see «DISPLAY PANEL CONTROL UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#display-panel-control-system) ). NO- Check for loose connections and recheck. If a poor connection or loose terminal is found, replace the shielded harness. If no poor or loose terminals are found, substitute a known-good navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ) and recheck. If the problem is gone, replace the original navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ).

Display panel control unit buttons or touch screen buttons do not work or respond properly

Note. Always check the connectors for poor connections or loose terminals. Before troubleshooting, make sure you have the navigation system and radio anti-theft codes.

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1. Turn the ignition switch to ACC (I).
2. Try several navigation buttons and touch screen buttons. Do all buttons function properly? YES- The system is OK at this time. NO- If all navigation buttons and touch screen are inoperative, go to step 3. If some navigation buttons operate normally, while others do not, go into the Diagnostic mode and use "Touch Panel" diagnostic under Monitor Check (see «F-CAN SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__f-can-system-link) ) and if necessary, "Display" diagnostic under unit check (see «UNIT CHECK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__unit-check) ).
3. Measure the voltage between body ground and display panel control unit connector A (14P) terminal No. 5 and No. 6 individually. Is there battery voltage? YES- Go to step 4. NO- If the +B wire does not have voltage, repair the open in the wire between the under-dash fuse/relay box and the display panel control unit. If the ACC wire does not have voltage, repair the open in the wire between the under-dash fuse/relay box and the display panel control unit.
4. Turn the ignition switch OFF.
5. Disconnect audio unit connectors A and B.
6. Disconnect the XM radio receiver.
7. Disconnect the display panel control unit connector A (14P).
8. Disconnect the navigation unit connector A (20P).
9. Check for continuity between display panel control unit connector A (14P) terminal No. 1 and body ground. Is there continuity? YES- Go to step 10. NO- Repair the open in the wire between the display panel control unit and body ground (G501).
10. Check for continuity between body ground and display panel control unit connector A (14P) terminal No. 3, No. 11 individually. Is there continuity? YES- There is a short to body ground in the circuit between the display panel control unit and the audio unit. Replace the affected shielded harness. NO- Go to step 11.
11. Check for continuity between body ground and display panel control unit connector E (22P) terminal No. 4 and No. 14 individually. Is there continuity? YES- There is a short to body ground in the circuit between the display panel control unit and the navigation unit. Replace the affected shielded harness. NO- Go to step 12.
12. Check for continuity between display panel control unit connector A (14P) terminal No. 10 and terminals No. 3 and No. 11 individually. Is there continuity? YES- There is a short between the display panel control unit and the audio unit. Replace the affected shielded harness. NO- Go to step 13.
13. Check for continuity between audio unit connector B (14P) terminal No. 3 and terminals No. 9 and No. 10 individually. Is there continuity? YES- There is a short between the audio unit and XM radio receiver. Replace the affected shielded harness. NO- Go to step 14.
14. Check for continuity between display panel control unit connector E (22P) terminal No. 15 and terminals No. 4 and No. 14 individually. Is there continuity? YES- There is a short between the display panel control unit and the navigation unit. Replace the affected shielded harness. NO- Go to step 15.
15. Check for continuity between display panel control unit connector E (22P) terminal No, 4 and navigation unit connector A (20P) terminal No. 10. Is there continuity? YES- Go to step 16. NO- There is an open in the circuit between the display panel control unit and the navigation unit. Check for poor connections or loose terminals at the display panel control unit and navigation unit. If a poor connection or loose terminal is found, replace the affected shielded harness.
16. Check for continuity between display panel control unit connector E (22P) terminal No. 14 and navigation unit connector A (20P) terminal No. 20. Is there continuity? YES- Go to step 17. NO- There is an open in the circuit between the display panel control unit and the navigation unit. Check for poor connections or loose terminals at the display panel control unit and navigation unit. If a poor connection or loose terminal is found, replace the affected shielded harness.
17. Check for continuity between display panel control unit connector A (14P) terminal No. 3 and audio unit connector C (26P) terminal No. 13. Is there continuity? YES- Go to step 18. NO- There is an open in the circuit between the display panel control unit and the audio unit. Check for poor connections or loose terminals at the display panel control unit and audio unit. If a poor connection or loose terminal is found, replace the affected shielded harness.
18. Check for continuity between display panel control unit connector A (14P) terminal No. 11 and audio unit connector C (26P) terminal No. 26. Is there continuity? YES- Replace the display panel control unit (see «DISPLAY PANEL CONTROL UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#display-panel-control-system) ). NO- There is an open in the circuit between the display panel control unit and the audio unit. Check for poor connections or loose terminals at the display panel control unit and audio unit. If a poor connection or loose terminal is found, replace the affected shielded harness.

Note. Make sure the vehicle is parked outside and away from buildings. Refer to GPS information (see GPS INFORMATION ) for realtime satellite reception display.

1. Check for metallic window tint on the windshield and electronic aftermarket accessories (possibly hidden) mounted near the GPS antenna or the navigation unit. Is there metallic window tint or electronic accessories? YES- Remove tint or the accessories and recheck. NO- Go to step 2.
2. Go into the Diagnostic mode and use the "Navi System Link" diagnostic (see «NAVI SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ) to check the GPS antenna. Is "GPS Ant" icon red? YES- Check for a kinked, crushed, or disconnected GPS antenna wire. If icon is still red, replace the GPS antenna. NO- Check that nothing is blocking the GPS antenna located under the package shelf and recheck. Substitute a known-good GPS antenna, and recheck. If the symptom is gone, replace the GPS antenna. If the symptom is still present, substitute a known-good navigation unit and recheck. If the symptom is gone, replace the original navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ).

Note. Always check the connectors for poor connections or loose terminals. Before troubleshooting, write down the customer's XM radio channel presets, and get the radio and navigation system anti-theft codes. After troubleshooting, enter the XM radio and navigation system anti-theft codes, and the radio station presets.

Scheme 48

Scheme 49

Scheme 50

Scheme 51

1. Press the display unit SET-UP button.
2. Check the volume and voice feedback setting for the navigation system in set-up. Is the volume and voice feedback setting set to OFF? YES- Set the volume to ON and select an audible level. NO- Go to step 3.
3. Check the radio operation. Can you hear the radio? YES- Go to step 4. NO- Troubleshoot the audio system.
4. Go into the Diagnostic mode and use the "Navi System Link" diagnostic (see «NAVI SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ) to check the radio. Is "Radio" icon red? YES- Troubleshoot the audio system. NO- Go to step 5.
5. Turn the ignition switch OFF.
6. Disconnect the navigation unit connector B (14P) and the audio unit connector A (20P).
7. Check for continuity between body ground and navigation unit connector B (14P) terminals No. 5, No. 12 individually. Is there continuity? YES- Repair short to ground in the harness between the navigation and audio units. Replace the affected shielded harness. NO- Go to step 8.
8. Check for continuity between navigation unit connector B (14P) terminal No. 11 and terminals No. 5 and No. 12 individually. Is there continuity? YES- Repair short to ground in the harness between the navigation and audio units. Replace the affected shielded harness. NO- Go to step 9.
9. Check for continuity between navigation unit connector B (14P) terminal No. 5 and the audio unit connector A (20P) terminal No. 13. Is there continuity? YES- Go to step 10. NO- There is an open in the circuit between the navigation unit and audio unit. Check for poor connections or loose terminals at the audio and navigation units. If a poor connection or loose terminal is found, replace the affected shielded harness.
10. Check for continuity between navigation unit connector B (14P) terminal No. 12 and the audio unit connector A (20P) terminal No. 12. Is there continuity? YES- Go to step 11. NO- There is an open in the circuit between the navigation unit and the audio unit. Check for poor connections or loose terminals at the audio and navigation units. If a poor connection or loose terminal is found, replace the affected shielded harness.
11. Substitute a known-good audio unit, and recheck. Is the system OK? YES- Replace the audio unit. NO- Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ).

Diagnostic Test: Mic Level

Note. Before assuming that a voice complaint is hardware related, ensure that the voice control system is being operated correctly. Make sure you are on the correct screen when trying to issue a voice command. For instance, the command "Find the nearest Italian Restaurant" only works on Map screen. See the Navigation System Manual for a complete list of allowed voice commands for the information being displayed). Close the windows and sunroof. Set the fan speed to low (1 or 2). Adjust the air flow from the air conditioning vents so that they do not blow against the microphone on the celling. Pause after pressing the TALK button then give a voice command clearly in a natural speaking voice. If the system cannot recognize your command, speak louder. If the microphone picks up voices other than yours, the system may not interpret your voice commands correctly. If you speak a command with something in your mouth, or your voice is too husky, the system may misunderstand your command. Always check the connectors for poor connections or loose terminals. Check for a loose roof console microphone; if it's loose, tighten it. Before troubleshooting, write down the customer's XM radio channel presets, and get the radio and navigation system anti-theft codes. After troubleshooting, enter the radio and navigation system anti-theft codes, and the XM radio channel presets.

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Scheme 60

1. Use the HDS to check for HFL DTCs. Troubleshoot and resolve any HFL problems before continuing. Are there any HFL DTCs? YES- Perform the troubleshooting for the DTC indicated. NO- Go to step 2.
2. Go into the Diagnostic mode and use the "Mic Level" diagnostic the under Functional Setup (see «TIRE CALIBRATE»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__tire-calibrate) ) to check the operation of the TALK and BACK buttons. Are the TALK and BACK buttons operational? YES- Go to step 8. NO- Go to step 3.
3. Disconnect the HFL-voice control switch and test it (see «HFL SWITCH/HFL-VOICE CONTROL SWITCH TEST/REPLACEMENT»(/acura/tl/iii-2003-2006/remont/communication-devices/#handsfree-link-system__hfl-switchhfl-voice-control-switch-testreplacement) ). Does the switch test OK? YES- Go to step 4. NO- Replace the HFL-voice control switch.
4. Disconnect audio unit connector C (26P) and navigation unit connector B (14P).
5. Check for continuity between HFL-voice control switch 5P connector terminal No. 2 and audio unit connector A (20P) terminal No. 11. Is there continuity? YES- Go to step 6. NO- Repair open in the wire in the harness, or replace the cable reel.
6. Check for continuity between HFL-voice control switch 5P connector terminal No. 1 and navigation unit connector B (14P) terminal No.10. Is there continuity? YES- Go to step 7. NO- Repair open in the wire in the harness, or replace the cable reel.
7. Check for continuity between body ground and HFL-voice control switch 5P connector terminals No. 1 and No. 2. Is there continuity? YES- Repair short to body ground in the wire harness, or replace the cable reel. NO- Replace the navigation unit.
8. Use the "Mic Level" diagnostic under Functional Setup (see «TIRE CALIBRATE»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__tire-calibrate) ) to check the operation of the microphone. Is the microphone operational? YES- Check the operation of the voice control system. See the Navigation System Manual. NO- Go to step 9.
9. Check for continuity between navigation unit connector B (14P) terminal No. 6 and No. 14, and the HFL control unit 22P connector terminal No. 21 and No. 22. Is there continuity? YES- Go to step 10. NO- Replace the affected shielded harness between the navigation unit and HFL control unit.
10. Check for continuity between body ground and navigation unit connector B (14P) terminal No. 6 and No. 14 individually. Is there continuity? YES- Replace the shielded harness between the navigation unit and HFL control unit. NO- Go to step 11.
11. Check for continuity between the navigation unit connector B (14P) terminal No. 13 and body ground. Is there continuity? YES- Replace the shielded harness between the navigation unit and HFL control unit. NO- Go to step 12.
12. Check for continuity between the HFL control unit 22P connector terminal No. 20 and body ground. Is there continuity? YES- Replace the shielded harness between the navigation unit and HFL control unit. NO- Go to step 13.
13. Disconnect the roof console 22P connector (see «CONTROL UNIT INPUT TEST»(/acura/tl/iii-2003-2006/remont/communication-devices/#handsfree-link-system__control-unit-input-test) ).
14. Check for continuity between the HFL control unit 22P connector terminal No. 10 and terminals No. 9 and No. 8. Is there continuity? YES- Replace the shielded harness between the HFL control unit and the roof console. NO- Go to step 15.
15. Check for continuity between the appropriate HFL control unit 22P connector terminals and the roof console 20P connector terminals. Is there continuity? YES- Replace the roof console. NO- Replace the shielded harness between the HFL control unit and the roof console.

Diagnostic Test: Yaw Rate and Car status

1. Check the GPS icon on the navigation picture. Is the GPS icon white? YES- Do the troubleshooting for GPS icon is white (see «GPS ICON IS WHITE OR NOT SHOWN»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). NO- Go to step 2.
2. Go into the Diagnostic mode and use the "Yaw Rate" diagnostic (see «YAW RATE»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__yaw-rate) ) to check the yaw rate sensor.
3. Go into the Diagnostic mode and use the "Car Status" diagnostic (see «PC CARD INFO.»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__pc-card-info) ) to check the vehicle speed pulse. Are the yaw rate sensor and vehicle speed pulse OK? YES- The problem may be normal. Check to see if the problem occurs in the same place in a known-good vehicle. If it does, the problem could be in the database. Go to step 4. NO- If the problem is the yaw rate sensor, replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ). If the problem is the vehicle speed pulse, troubleshoot the vehicle speed signal circuit. BLU/WHT wire for open or short. If OK, swap a known-good ECM/PCM. If the problem or symptom goes away, replace the original ECM/PCM.
4. Substitute a known-good navigation unit and check to see if the problem occurs in the same place. Does the problem occur in the same place? YES- The problem is in the database. Report the problem according to the Navigation System Owner's Manual under "Reporting Errors". NO- Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ).

Diagnostic Test: Car Status

Note. Refer to the General Troubleshooting for a list of common DVD screen error messages and the probable cause (see ERROR MESSAGE TABLE ). Go into the Diagnostic mode and use the "Car Status" diagnostic (see PC CARD INFO. ) to check the status of the DVD lid.

1. Check the DVD-ROM reading surface for scratches and finger prints. Are there any scratches or finger prints on the DVD-ROM reading surface? YES- Clean or replace the DVD-ROM (see «FORCED STARTING OF DISPLAY»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). NO- If the problem occurs occasionally when the system is cold, this is normal. If the problem occurs frequently when driving, replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ).

Navigation cannot control A/C by vice

Note. Always check the connectors for poor connections or loose terminals. Before troubleshooting, get the navigation system anti-theft codes. After troubleshooting, enter the navigation system anti-theft codes. Verify that the correct navigation unit is instakked for this model. Go into the Diagnostic mode and use "Version" (see VERSION ).

1. Go into the Diagnostic Mode and use the "Navi System Link" check (see «NAVI SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). Is the "Air-con" icon red? YES- Do the climate control system troubleshooting. NO- Check for an open or short to ground between display panel control unit connector B (5P) terminals No. 1, No. 2, No. 3, No. 4, No. 5, and climate control unit connector A (20P) terminals No. 2, No. 4, No. 11, No. 12, No. 13. If OK, check the climate control system for normal operation. If the climate control system works properly, substitute a known-good display unit and recheck.

Display day/night mode does not work

Note. Always check the connectors for poor connections or loose terminals. Before troubleshooting, get the navigation system anti-theft codes. After troubleshooting, enter the navigation system anti-theft codes.

1. Make sure the instrument panel brightness control is not on full brightness (MAX button pressed).
2. Change the day/night mode to AUTO under Set-up, and recheck. Does the display change to day and night modes using the headlights? YES- The system is OK at this time. NO- Go to step 3.
3. Go into the Diagnostic Mode and use diagnostic the "Car Status" diagnostic to check for an ILL signal (see «PC CARD INFO.»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__pc-card-info) ). Is the "ILL" signal OK? YES- The system is OK. NO- Check the ILL+ circuit for an open or short to ground between navigation unit connector A (20P) terminal No. 5 and under-dash fuse/relay box connector I terminal No. 2. If OK, substitute a known-good navigation unit and recheck.

System locks up constantly

1. Start the engine and turn the ignition switch OFF, then turn the ignition switch ON (II). Does the system reboot? YES- The system is OK at this time. NO- Check the DVD-ROM for scratches or damage and the navigation unit for water damage. If OK, go into the Diagnostic mode and do all of the "Unit Check" diagnostics (see «UNIT CHECK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__unit-check) ).

Vehicle icon wanders across the map when driving (does not follow a displayed road) or map or vehicle ICON spins

Note. This is not the same condition as when driving off-road (or on a fire or logging road). This condition is caused by a loss of map matching from a bad sensor input. Check for aftermarket or other objects that can block the GPS signal. Always perform map matching (see MAP MATCHING ) before proceeding with the troubleshooting.

1. Go into the Diagnostic mode and do the "Navi System Link"diagnostic (see «NAVI SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ), the Navi ECU diagnostic under "Unit Check" (see «UNIT CHECK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__unit-check) ), the Car Status check (see «PC CARD INFO.»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__pc-card-info) ), the GPS information check (see «GPS INFORMATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__gps-information) ), the GPS Detail check (see «GPS DETAIL»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__gps-detail) ), and the Yaw Rate check (see «YAW RATE»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__yaw-rate) ). Are all the tests OK? YES- The system is OK at this time. NO- Repair the affected system. If the problem persist, swap a known-good navigation unit and monitor the condition.

Navigation drives by itself when parked

Note. Always check the connectors loose terminals. Before troubleshooting, get the navigation system anti-theft codes. After troubleshooting, enter the anti-theft code, and initialize the navigation system.

1. Start the engine.
2. From the main menu, select places, then select any destination, and begin the trip.
3. With the vehicle parked, watch the vehicle icon on the display. Does the vehicle position icon move by itself? YES- Go to step 4. NO- The system is OK at this time.
4. Go into the Diagnostic mode and select "Demonstration", under Functional Setup. Is "Demonstration Mode" set to "Yes"? YES- Set the Demonstration mode to "NO". NO- Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ).

Navigation stays on with ignition switch off

Note. Always check the connectors for poor connections or loose terminals. Before troubleshooting, get the navigation system anti-theft codes. After troubleshooting, enter the anti-theft code, and initialize the navigation system.

1. With the key out of ignition. Does the navigation screen stay on? YES- Go to step 2. NO- The system is OK at this time.
2. Check for a short to power on the navigation unit connector C (8P) terminal No. 2. Is there a short? YES- Troubleshoot the ACC circuit. NO- Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ).

1. Make sure the anti-theft code for the audio system is entered.
2. Go into the Diagnostic mode and use the "Navi System Link" diagnostic (see «NAVI SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). Is the "Radio" icon red? YES- Do the troubleshooting for the voice guidance cannot be heard (see «GPS ICON IS WHITE OR NOT SHOWN»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). NO- Go to step 3.
3. Substitute a known-good navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ), and recheck. Can the navi control audio/disc? YES- Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ). NO- Do the audio system troubleshooting.

Audio-HVAC subdisplay unit does not work properly

1. Check the connections at the audio-HVAC subdisplay unit 10P connector and the display panel control unit connector E (22P). Are the connections and terminals connected properly? YES- Go to step 2. NO- Repair the connection and recheck.
2. Disconnect the audio-HVAC subdisplay unit 10P connector and display panel control unit connector E (22P).
3. Check for continuity between the audio-HVAC subdisplay unit 10P connector and the display panel control unit connector E (22P) terminals according to the table. HVAC SUBDISPLAY UNIT AND DISPLAY PANEL CONTROL UNIT - TERMINAL SPECIFICATION TABLE Wire color Audio-HVAC subdisplay unit 10P connector terminal Display panel control unit connector E (22P) terminal BLU/ORN 2 E20 YEL/RED 4 E22 YEL 5 E21 BLU/RED 6 E10 BLU 7 E9 BRN/BLK 8 E8 RED 9 E19 RED/BLU 10 E18 BLK 1 (Body ground) Is there continuity? YES- Go to step 4. NO- Repair the open in the wire between the display panel control unit and the audio-HVAC subdisplay unit.
4. Check for continuity between each audio-HVAC subdisplay unit 10P connector terminal and body ground. AUDIO-HVAC SUBDISPLAY UNIT - TERMINAL SPECIFICATION TABLE Wire color Audio-HVAC subdisplay unit 10P connector terminal BLU/ORN 2 YEL/RED 4 YEL 5 BLU/RED 6 BLU 7 BRN/BLK 8 RED 9 RED/BLU 10 BLK 1 Is there continuity? YES- Replace the shielded harness between the display panel control unit and the audio-HVAC subdisplay unit. NO- Go to step 5.
5. Check the same wires for continuity to terminal No. 8 (BRN/BLK) wire of the audio-HVAC subdisplay unit 10P connector. Is there continuity? YES- Replace the shielded harness between the audio-HVAC subdisplay unit and the display panel control unit. NO- Go to step 6.
6. Substitute a known-good audio-HVAC subdisplay unit and recheck. Does the subdisplay work properly? YES- Replace the original audio-HVAC subdisplay unit. NO- Substitute a known-good display panel control unit and recheck. If the problem is gone, replace the original display panel control unit.

1. Make sure the cell phone is paired to the HFL (see «PAIRING YOUR CELL PHONE (A ONE TIME PROCEDURE)»(/acura/tl/iii-2003-2006/remont/communication-devices/#handsfree-link-system__pairing-your-cell-phone-a-one) ) and working properly (see «GENERAL TROUBLESHOOTING INFORMATION»(/acura/tl/iii-2003-2006/remont/communication-devices/#handsfree-link-system__general-troubleshooting-information) ). Is the cell phone paired? YES- Go to step 2. NO- Pair the cell phone to the HFL and retry.
2. Go into the Diagnostic Mode and use the "Navi System Link" diagnostic (see «NAVI SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). Is the "HFL" icon red or flickering? YES- Go to step 3. NO- Go to step 6.
3. Disconnect navigation unit connector F (5P) and the HFL control unit connector (22P).
4. Check for continuity between navigation unit connector F (5P) terminals and HFL control unit connector (22P) terminals according to the table. NAVIGATION UNIT AND HFL CONTROL UNIT - TERMINAL SPECIFICATION TABLE Navigation Unit Connector (5P) HFL Control Unit Connector (22P) Wire color F1 5 ORN/BLU F2 15 BLU/GRN F3 16 BLU/YEL F4 17 WHT/BLU F5 18 BRN Is there continuity? YES- Go to step 5. NO- Replace the shielded harness.
5. Check for continuity between the navigation unit connector F (5P) terminals and body ground according to the table. NAVIGATION UNIT TERMINAL SPECIFICATION TABLE Navigation Unit Connector F terminals Wire color F1 ORN/BLU F2 BLU/GRN F3 BLU/YEL F4 WHT/BLU F5 BRN Is there continuity? YES- Replace the shielded harness. NO- Go to step 6.
6. Substitute a known-good HFL control unit and retest. Is the system OK? YES- Replace the original HFL control unit. NO- Replace the navigation unit.

1. Make sure the anti-theft code for the audio system is entered.
2. Go into the Diagnostic mode and use the "Navi System Link" diagnostic (see «NAVI SYSTEM LINK»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). Is the "XM" icon red? YES- Do the troubleshooting for the voice guidance cannot be heard (see «GPS ICON IS WHITE OR NOT SHOWN»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ). NO- Go to step 3.
3. Substitute a known-good navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ) Can the navi control XM radio? YES- Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__navigation-unit-removalinstallation) ). NO- Do the audio system troubleshooting.

Navigation frequently asks for code and needs GPS initialization

1. Check for an open on navigation unit connector C (8P) terminals No. 1 and No. 2. Are the circuits OK? YES- Replace the navigation unit. NO- Repair the circuits.

Start-up procedure and Diagnosis Menu

There are two ways to enter the diagnostic mode

Scheme 61

1. Connect the SCS service connector (see «FORCED STARTING OF DISPLAY»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ) to the navigation service connector located in the trunk. Turn the ignition switch to the ON (II) position. The display will go directly to the diagnostic menu screen. NOTE: When finished troubleshooting, make sure to remove the SCS service connector.
2. Turn the ignition switch ON (II). Use the navigation display hard buttons as described below: If the battery has not been disconnected, then press and hold the 3 buttons (Menu, Map/Guide, and Cancel), and keep them pressed for about 5 seconds. The display screen will go directly to the "Select Diagnosis Items" menu. If the battery was disconnected and reconnected prior to this test, hold down the Menu and Zoom Out buttons at the "Code" or "GPS Acquire" screen. The display will go to the "Navi System Link" screen. Push the joystick to go to the "Functional Setup menu", then touch the Return icon to get to the "Select Diagnosis Items" menu. NOTE: This only allows access to the diagnostic screens. All other navigation functions are disabled.
3. After the display changes to the Select Diagnosis Items menu, select the item you want to check and the diagnostic will start. To return to the previous screen, select "RETURN". Navi System (Link) F-CAN (System link) B-CAN (System link) Monitor Check Unit Check Car Status GPS Information Yaw Rate Tire Calibrate Functional Setup Version

Scheme 62

1. This diagnostic tests the cables connecting the navigation components. Ensure that the ignition switch is in the ON (II) position. When the diagnostic begins, a "bong" sound is heard. The system is in a "Detecting" mode, and is waiting for all items in white to be tested. This includes the navigation voice control (TALK/BACK) buttons, and microphone. Press the navigation TALK button on the steering wheel, and in a normal voice, say "testing". The Talk indicator on the screen should become green, and the voice level indicator should move to at least the 6th bar to pass. Next, press the navigation BACK button. This should cause the "Cancel" indicator to go green.
2. If all of the communication lines connecting the system components, and the navigation TALK/BACK buttons/microphone check out OK (all block diagram items green), then the "OK" indicator will become green.
3. If there is a problem with the system, the faulty system component item will change to red, and the screen will show "NG" in red. Use the troubleshooting index, and other diagnostic screens to help locate the problem.
4. The indication on the screen will not change until the ignition switch is cycled. After repairing the affected cable or system, repeat this diagnostic. NOTE: Green boxes and green "OK" indicate that the communications lines (cables) are intact. This diagnostic does not necessarily imply that the individual components are functioning properly. For instance, the GPS antenna wire may be crushed, but still show as "green". A road test, or other diagnostic may be necessary to find the problem.
5. This navigation system is designed for use in the US or Canada market. US Market: English is the only language choice. Canada Market: On the disclaimer screen, English or French can be selected. Touch the "Chg Canada" or "Chg US" button to select the desired choice.
6. Select "Return" to return to the Diagnosis Menu.

Note. The mic level indicator must reach the 6th bar or greater to pass the test. If the XM link is red or flashing red, go to audio system symptom troubleshooting (see POOR OR NO SOUND WITH XM RADIO ).

F-CAN System Link

F-CAN (Fast Controller Area Network) passes information between processors on the network. For example, the F-CAN network is used to pass charge signal between the ECM/PCM and the navigation unit for the computer cooling fan function. The F-CAN network uses a communication protocol that transmits data at 500 Kbps.

Scheme 63

1. If the diagnostic screen below reads NG with the ignition switch ON (II), then diagnostic trouble codes (DTCs) for the F-CAN can be retrieved with the HDS (Honda Diagnostic System). The data displayed in the ID boxes is irrelevant.
2. For more details on troubleshooting the F-CAN, refer to the multiplex system.

B-CAN System Link

B-CAN (Body Controller Area Network) communication moves at a slower speed for convenience related items, and for other functions.

Scheme 64

1. If the diagnostic screen below reads NG, then diagnostic trouble codes (DTCs) for the B-CAN can be retrieved with the HDS (Honda Diagnostic System). The data displayed in the ID boxes is irrelevant.
2. For more details on troubleshooting the B-CAN, refer to the multiplex system.

Monitor Check

Overview of the display unit

1. The display unit communicates with the navigation unit over its own GA-Net bus. Information is sent to the navigation unit whenever the user activates the touch screen, or buttons. Information sent by the navigation unit to the display unit includes commands to control the LCD back light.
2. The navigation unit also sends navigation and rear camera video information to the screen using the Red, Green, Blue, and Composite Video signals.
3. The display unit is protected by the security system by daisy-chaining the security signal through it, and then passing the signal to the audio unit.
4. The illumination input from the gauge brightness control provides back lighting for the buttons surrounding the screen.
5. The display unit also communicates with the climate control unit to set the A/C mode and fan speed, and to receive the outside temperature that is displayed on the A/C-INFO screen.

These screens allow troubleshooting of the display unit. Select the item you want to troubleshoot, and follow the diagnostic instructions.

Scheme 65

RGB Color

This screen verifies that the display unit is receiving the video (R, G, B and Composite sync) signals properly. The three primary colors should all be shown without distortion. The combination of all three should produce a central white section. If any of the colors are missing, troubleshoot for the color signal (see PICTURE IS MISSING A COLOR OR TONE ). If the picture has lines in it or scrolls horizontally, or vertically, troubleshoot for a Composite sync problem (see PICTURE HAS LINES/ROLLS/OTHER ISSUES OR IS AN ODD COLOR ).

Scheme 66

Gray Tone

This screen diagnosis problems with contrast. You should be able to see the changes from bar to bar across the scale. It is normal for the 2 bars on either side to appear the same.

Scheme 67

White Raster

The entire display must be shown in white.

Scheme 68

Black Raster

The entire display must be shown in black.

Scheme 69

Test Pattern

The chart below shows the colors being used for the map and menu screens. This is for factory use only. To check the color signal use the "RGB Color" diagnostic found under the Monitor Check.

Scheme 70

Monitor Adjustment

This allows the navigation display to be centered. Use the joystick to move the picture up/down or left/right. It is unlikely that you will ever need to adjust the monitor position. The "Default" button will reset the display position to factory specifications.

Scheme 71

Touch Panel Check

The panel touch sensing system consists of a touch sensitive resistive membrane covering the display. Contrary to other systems using infrared beams, the screen has to be physically "touched" to make it work. The display has capability of an almost infinite number of touch locations. However, to be compatible with earlier systems, the software only senses the locations shown on the diagnostic screen below. Every possible touch button position is shown on this diagnostic screen. Touching one of these areas should cause its color to reverse, and sound a "beep". If the touch locations are off slightly (by less than one touch location), use the "Touch Panel Calibration" diagnostic to re-align the touch "zones" with the screen image. If any areas of the screen either don't respond, or respond at some other location when touched, then replace the display unit.

Note. Unlike earlier screens that used infrared sensors, direct sunlight will not affect this test.

Scheme 72

Touch Panel Calibration

The display screen uses a touch sensitive membrane instead of fixed infrared "beams". This means that every location of the entire surface of the display is touch sensitive.

For the display to be compatible with earlier navi systems, the system software creates "touch zones" emulating the touch "switches" created by the intersections of 20 vertical and 9 horizontal infrared beams. This diagnostic allows alignment of these artificially created "zones" with the location of the button's images on the screen.

Normally this should never need adjustment, and it used only to adjust the touch locations for parallax (the touch locations appear different when viewed at an angle). However if an adjustment is necessary, the procedure is as follows

Scheme 73

1. The screen consists of four test areas consisting of a "+" button and an adjacent box with a black border. Touch the four "+" buttons to verify alignment. If when you touch a "+" button, the adjacent box becomes yellow, then perform the following. Continue to hold the "+" button, and simultaneously move the joystick to shift the screen slightly from side to side or up and down. The adjustment is complete when you can touch all four "+" boxes and not see any of the adjacent boxes become yellow.
2. To store any changes you make, push in the joystick.
3. To reset the touch zones to the factory default touch the MAP/GUIDE button.
4. Use Return to exit the diagnostic.

Unit Check

Select the item you want to check and the diagnostic starts.

Scheme 74

Display

This diagnostic performs additional checks on the communication bus between the control unit and the display. In addition, the internal electronics and touch screen functionality are confirmed.

1. When the connection is NG, first check for loose terminals at the navigation unit and the display unit connections. Next check for an open or short in the communication line between the navigation unit and the display unit. If the line is found to have an open or short, replace the affected shielded harness.
2. If the ROM or RAM is NG, replace the display unit.
3. Touch sensor checks the functionality of the touch screen.
4. The version represents the software version in the display.

Note. When selecting this diagnostic from "Unit Check," quickly remove your fingers from the touch screen to avoid a false detection.

Scheme 75

Radio

If the NG is indicated, check for loose audio unit connector.

Note. If the XM link was displayed red, but the radio link was displayed green in the navigation system link, refer to the audio system symptom troubleshooting (see ERROR CODES ).

Scheme 76

Navi ECU

This screen looks for problems the navigation unit. When this diagnostic is initiated, there is a delay of up to a minute while it runs.

Note. Do not try to end this diagnostic by pressing "OK" or "Mem clear" before it finishes, otherwise the system will reboot.

Scheme 77

1. "ROM (Application)", and "RAM (Loader)" are for factory use.
2. If "V-RAM" or "D-RAM" is NG, then replace the navigation unit.
3. If "GPS" indicates "NG (ANT)", then check the entire GPS antenna wire from the navigation unit to the antenna. If the wire is crushed or damaged, try a known-good antenna. If this diagnostic reads OK, then replace the GPS antenna. If the diagnostic still reads NG (ANT), then replace the navigation unit.
4. "DVD ROM" represents the database version on the DVD. This information can also be found in Setup Screen 4 by Selecting System Information.
5. "Serial No." should be the same as the serial number found on the underside of the navigation unit. This number is needed to obtain the security code from the Interactive Network (IN) system.
6. The "Mem Clr" is for factory use and should not be used unless instructed by the factory. Selecting this will erase the customer's settings, personal information, GPS orbital data, and anything else stored in memory.

PC Card info.

There is no PC Card in the PC card slot, and the screen should say, "PC Card is not inserted".

Note. Do not insert any card or object into the slot.

Scheme 78

If the factory provides a PC card and instructs you to insert a card, then the screen displays the Manufacturer, and Product Name as shown in the following screen.

Scheme 79

Car Status

This screen is used to confirm that navigation unit is properly receiving input signals. Signals equal to (0) are OFF, and signals equal to (1) are ON. If the value on the display does not match the actual vehicle status, then check the wire carrying the signal.

1. CHG-(OBSELETE-NOT USED) Charge indicator (Pin 3 of C-connector) OFF (0) when engine is off, or alternator is not charging ON (1) when engine is running

This signal was used by the previous DVD navigation system. If CHG was off, then the screen was shut off after 10 minutes of inactivity to minimize battery consumption.

1. VSP-Vehicle Speed Pulse from ECM/PCM (Pin 6 of navigation unit C-connector) OFF (0) when vehicle is not moving ON (1) when vehicle is moving

The VSP comes from the ECM/PCM as a dedicated signal. Internally, the navigation unit compares the actual VP on the map against street data to adjust the pulse to speed scaling factor. As this scaling factor becomes more accurate, the "Level" gradually increases from 0 to 10 (see the Tire Calibrate diagnostic screen).

1. BACK-Reverse indication from multiplex integrated control unit (A/T) or back-up light switch (M/T) (Pin 5 of navigation unit C-connector) OFF (0) when shift lever is in any position other than reverse ON (1) when shift lever is in reverse

The Back signal is used by the navigation unit to allow the map screen to show the VP moving backwards when in reverse. This signal is needed because the Speed Pulse has no direction indication.

1. CHG (CAN)-Charge indicator from ECM/PCM using F-CAN bus (Pin 8,18 of navigation unit A-connector) OFF (0) when engine is off ON (1) when engine is running

This signal is obtained off of the F-CAN bus, and is used for navigation unit cooling fan function. For problems, perform F-CAN troubleshooting. Diagnostic trouble codes (DTCs) for the F-CAN can be retrieved with the HDS (Honda Diagnostic System).

1. ILL-lllumination Indication (Pin 5 of navigation unit A-connector) OFF (0) when parking lights, or headlights are off ON (1) when parking lights, or headlights are off

This signal is used by the navigation unit to determine whether to put the navigation screen into the Day or Night brightness mode. (Setup screen 1)

1. DVD Lid-senses if DVD door is open (Close) when door is closed (Open) when door is open

The navigation unit has a micro switch to detect this. If open is indicated when the door is closed, replace the navigation unit.

1. PC Card Lid-senses if PC Card door is open (Close) when door is closed (Open) when door is open

The navigation unit has a micro switch to detect this. If open is indicated when the door is slid shut, then replace the navigation unit. This slot is for insertion of PC Flash memory cards for gathering diagnostic information. This is for factory use only.

Note. If the customer is complaining that the PC door open message appears, but the operation of the door appears to be normal. Take a piece of clear tape and cover the door latch handle to prevent accidental opening.

Scheme 80

GPS Information

This screen shows the current status of GPS reception. The circular diagram shows the current location of the GPS satellites (yellow numbers) as they would appear in the sky. The outer circle represents the horizon (0 degrees elevation). The middle and inner circles represents 30 and 60 degrees respectively. The very center of the diagram (90 degrees elevation) is directly overhead. Naturally, nearby obstructions, like tall buildings will block satellites in that direction. That is why it is necessary to be in an open area to effectively troubleshoot GPS reception issues. The satellite numbers shown on the diagram correspond to the "PRN" number in the "GPS Details" screen. There are always at least 24 "active" GPS satellites in orbit. Because satellites fail, and have to be removed from service, spares are always parked in orbit, ready to be activated. This is why the PRN (satellite ID number) can be greater than 24.

Note. To use this screen for troubleshooting, the vehicle should be out side away from buildings, tall trees, and high-tension wires for at least 10 minutes with the engine running.

Scheme 81

1. The "Number of Satellites" box shows the number of acquired satellites (maximum of 12). It should contain 3 or more icons. If not, troubleshoot for "GPS icon is white" (see «GPS ICON IS WHITE OR NOT SHOWN»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ).
2. The "Current Position" shows latitude, longitude, and elevation (in feet). If there are less than 3 satellites, the elevation can be grossly inaccurate.
3. The Date/Time field shows the current date, and also a time that includes daylight savings and other offsets entered by the customer in Setup screen 4 "Adjust Time Zone/Clock".

GPS Detail

By pressing and holding the MENU button for 10 seconds, a GPS Detail screen is displayed. This screen displays real time incoming satellite positional data when the vehicle is outside in the open. The information shown on this screen is for factory use.

Scheme 82

1. The box TS/AS and HDop/VDop is for factory use.
2. The Speed and Direction information is updated in real time when driving.
3. The Date/Time Information is the same as in Setup screen 2 "Adjust Time Zone/Clock".
4. If the "3D" icon is shown above the yellow dots, this implies that at least 4 satellites are available for map positioning, and the "GPS" indicator on the map screen will be green. See the "Global Positioning System" detailed explanation in the "System Description".
5. If the row of data in the table below begins with a "yellow dot", the AZI and EL fields can be used to locate each satellite on the circular GPS diagram (see prior screen).

Note. The data shown in the GPS Detail screen is an example only.

The table of values shown on the screen below has the following columns

Scheme 83

Yaw Rate

This diagnostic checks the yaw rate sensor in the control unit. This device detects when the vehicle turns, and repositions the vehicle position icon on the map screen. For more detailed information, see the yaw rate sensor theory of operation under "System Description".

1. "Sensor" indicates the voltage output from the yaw rate sensor. It should indicate about 2.500 V when stopped.
2. "Offset" is the reference voltage or standard within the yaw rate sensor. It also should indicate about 2.500 V when stopped.
3. A "sensor" output voltage HIGHER than the "Offset" voltage indicates that the vehicle is turning to the right. A "sensor" output voltage LOWER than the "Offset" voltage indicates that the vehicle is turning to the left.
4. The yaw rate offset, and sensor should both indicate about 2.500 V when stopped. If either reads zero, or 5.000 V, replace the navigation unit.
5. The yaw rate offset and sensor should be within +/-0.01 V of each other when stopped. The sensor value should change relative to the offset as the car is turned while driving. If not, replace the navigation unit.

Example: Car stopped

CAR STOPPED - NORMAL AND ABNORMAL SPECIFICATION TABLE

Example: Car turning

CAR TURNING - NORMAL AND ABNORMAL SPECIFICATION TABLE

Scheme 84

1. Auto tuning should always be on. If it is off, turn it on.
2. "Sensitivity study" represents the status of the internal tuning function. At initialization, this value starts at 6 and increases to # 10 as the internal correction values become more accurate.
3. The settings "CCW Cal Factor", "CW Cal Factor", and "Set" are for factory use only. THIS SHOULD NEVER BE ADJUSTED.

Tire Calibrate

As the vehicle moves, the navigation system receives speed pulses from the PCM. These pulses are converted using a conversion factor to a mph speed that moves the vehicle position (VP) on the map. The navigation system has an internal tuning function that generates and refines this factor based on actual driving. The "Level" indicates the status of the tuning. At navigation initialization, it begins at 0, and increases to 10 as the navigation system is used.

Scheme 85

1. The "Auto Tuning" is factory set to "ON", and should remain on.
2. The "LEVEL" indicates the tuning status. If it is less than 10, the unit is still calibrating.
3. The "Tire-Cal. Tuning" and Set should not be used. It is for factory use only.

Functional Setup

Select the item you want to check.

Scheme 86

Note. Trip Information not available.

Solar Angle

This screen is used to graphically display the sun's position as determined by GPS. The Navi System uses the sun's angle, along with the sunlight sensor to control the driver/passenger A/C airflow. The heat that must be removed by the A/C unit varies, depending on the angle of the sun entering the vehicle. This screen is for factory use only, and should not be adjusted.

Scheme 87

1. The screen shows a circular diagram of the sky oriented in the direction that the vehicle is pointing. During daylight hours a red dot is shown, representing the direction and elevation of the sun. The outer circle represents the horizon (0 degrees elevation). The middle circle is 30 degrees, the center circle is 60 degrees, and the very center is directly overhead (90 degrees).
2. The "Auto button" should always be on (yellow).
3. The "Angle", "Dir", and "Reliability" settings are used by the factory to simulate the sun's position for debugging this function.

Log Data

This screen allows the factory to select log data to troubleshoot navigation system issues.

Scheme 88

Scheme 89

1. Normally there is no card in the "PC Card Slot", and the screen should say, "PC Card is not inserted". The PC card slot door should always be closed.
2. However, if the factory provides a PC card and instructs you to insert it into the PC card slot (label side up), and then slide the PC Card slot door shut. If instructed by the factory, Select "Gyro. Sensor Logs ON". Follow the factory procedure for gathering test data, and properly ending the test.

GPS Offset Time

This screen is for factory use only. It allows adjustment of the GPS time. This display updates in real time.

Scheme 90

1. "GPS Time" is the time as received from the GPS satellites. It is in Greenwich Mean Time (GMT).
2. "System Time" is the internal time used by the navigation unit to calculate your position on the map. It is also in Greenwich Mean Time (GMT).
3. "Display Time" is the time shown on Setup screen 2 "Adjust Time Zone/Clock", and reflects any changes due to daylight savings time or time adjustments entered by the customer.
4. Date, Hour, Minute, and "Set" should not be used.

Mic Level

This diagnostic allows you to independently test the microphone and the TALK and BACK buttons. They are used to activate the voice control and HFL system. The microphone is located near the map light in the roof console. It is directional, and works best with the voice coming from the driver's seat.

Scheme 91

1. Press the TALK button on the steering wheel, and in a normal voice say "testing". The TALK indicator on the screen should momentarily become green, and the text "Now Recording..." should appear in yellow. In addition, the Mic Level indicator should on the screen does not briefly become green, then check the wiring from the steering wheel talk button to the navigation unit. If there is no "Mic Level" movement when you speak, then you should check the wires running from the microphone in the roof console to the HFL control unit and the navigation unit. If the wires are OK, the microphone must be faulty; replace the roof console (see step 4 on «HEADLINER REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/exteriorinterior-trim/#interior-trim__headliner-removalinstallation) ).
2. Press the BACK button on the steering wheel. This should cause the Cancel indicator on the screen to momentarily become green. If it does not briefly change to green, then check the wiring from the steering wheel BACK button to the navigation unit.

VSP Count

This screen displays the number of pulses per revolution of the tire. This is for factory use only, and should not be changed.

Scheme 92

1. "Pulse Count Setting" should always be set to "Auto".
2. "VSP Count" should always be "4", and should never be adjusted or set to any other value.

H/U Time Send

This screen determines whether to automatically send the navigation time to the audio-HVAC subdisplay unit. The audio-HVAC display panel connector C (10P) passes this information to the audio-HVAC subdisplay unit. The navigation time can be found in the Setup screen 2 "Adjust Time Zone/Clock" setting.

1. "H/U Time Send" should always be set to "ON".

Note. Touching "Reset" on the Adjust Time Zone/ Clock screen automatically resets this diagnostic function to "ON".

Scheme 93

Demonstration

This screen is for factory use only, and should always be set to "OFF". Occasionally this setting is turned "ON" when vehicles are being used at Auto Shows or similar events. Turning this feature on, allows the navigation system to automatically follow a route to a destination when the vehicle is stationary.

Scheme 94

Version

This screen displays the current version of the program, and allows the loading of a new version of the program either from a CD/DVD or from a PC card.

The D-RAM Program version should always be greater than or equal to the Disc Program version. The mapped database version is the date of the database on the DVD.

The Model code is 24H ('04 model) or 26H ('05-06 models), and is for factory use only.

Do not use DISC LOAD or Card LOAD, unless instructed to do so by the factory.

Scheme 95

Note. If any model number other than 24H ('04 model) or 26H ('05-06 models) is displayed, replace the navigation unit with the correct part. The model code tells the navigation unit what software to load off the DVD.

Error Message Table

ERROR MESSAGE TABLE

Scheme 96

1. Remove the trunk trim (see «TRIM REMOVAL/INSTALLATION - TRUNK AREA»(/acura/tl/iii-2003-2006/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-trunk-area) ).
2. Turn the ignition switch OFF, and connect the SCS service connector (A) to the navigation service check connector (B) located upper of the navigation unit.
3. Turn the ignition switch ON (II), and check that the diagnosis menu for the picture diagnosis starts up, and then changes to the system link menu.

Note. If the display fails to display the "Navi System Link" screen, refer to no picture is displayed (see NO PICTURE IS DISPLAYED ).

DVD-ROM Replacement

Note. When the DVD-ROM is re-inserted or replaced, a Map Matching must be done (see MAP MATCHING ).

Scheme 97

1. Turn the ignition switch ON (II).
2. Open the cover (A) on the right side of the trunk to gain access to the navigation unit.
3. Open the door (B), then press the EJECT button (C).
4. Remove the DVD-ROM.
5. Insert the new DVD-ROM with the orange label facing up.
6. Close the front cover. Do not turn the ignition switch OFF; watch the navigation screen until the data is down loaded to the navigation unit.

Note. After servicing, the front cover and PC card slot door must be closed. If you start up the navigation system with the front cover or PC card slot door open, the display will indicate an error message.

Navigation Unit Removal/Installation

Note. If possible, have the customer record any personal information from the navigation system that will be lost. If the navigation unit is replaced or disconnected, a Map Matching must be done (see MAP MATCHING ).

Scheme 98

1. Remove the trim lining (see «TRIM REMOVAL/INSTALLATION - TRUNK AREA»(/acura/tl/iii-2003-2006/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-trunk-area) ).
2. Remove the DVD-ROM (see «FORCED STARTING OF DISPLAY»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system) ).
3. Remove the four screws (A) from the bracket (B) located in the trunk.
4. Disconnect the navigation unit connectors (C).
5. Remove the navigation unit (D).
6. Install in the reverse order of removal.
7. Install the DVD-ROM, then enter the 4-digit security code.
8. Do the system initialization (see «SYSTEM INITIALIZATION»(/acura/tl/iii-2003-2006/remont/navigation-system/#navigation-system__system-initialization) ).
9. Give the new anti-theft code to the customer.

Scheme 99

1. Remove the rear shelf (see «TRIM REMOVAL/INSTALLATION - REAR SHELF AREA»(/acura/tl/iii-2003-2006/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-rear-shelf-area) ).
2. Remove the trunk trim (see «TRIM REMOVAL/INSTALLATION - TRUNK AREA»(/acura/tl/iii-2003-2006/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-trunk-area) ).
3. Remove the rear seat-back (see «REAR SEAT REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/seats/#seats__rear-seat-removalinstallation) ).
4. Disconnect the GPS antenna connector (A).
5. Remove the GPS antenna (B).
6. Install in the reverse order of removal.

See also:
• DISPLAY PANEL CONTROL UNIT REMOVAL/INSTALLATION
• HFL SWITCH/HFL-VOICE CONTROL SWITCH TEST/REPLACEMENT
• CONTROL UNIT INPUT TEST
• PAIRING YOUR CELL PHONE (A ONE TIME PROCEDURE)
• GENERAL TROUBLESHOOTING INFORMATION
• POOR OR NO SOUND WITH XM RADIO
• ERROR CODES
• HEADLINER REMOVAL/INSTALLATION
• TRIM REMOVAL/INSTALLATION - TRUNK AREA
• TRIM REMOVAL/INSTALLATION - REAR SHELF AREA
• REAR SEAT REMOVAL/INSTALLATION
• UNIT CHECK
• GPS ICON IS WHITE OR NOT SHOWN
• SYSTEM INITIALIZATION
• SYSTEM FUNCTION DIAGRAM
• DISPLAY PANEL CONTROL UNIT BUTTONS OR TOUCH SCREEN BUTTONS DO NOT WORK OR RESPOND PROPERLY
• NAVIGATION CANNOT CONTROL A/C BY VICE
• SYSTEM LOCKS UP CONSTANTLY
• NAVIGATION DRIVES BY ITSELF WHEN PARKED
• TIRE CALIBRATE
• NAVIGATION UNIT REMOVAL/INSTALLATION
• F-CAN SYSTEM LINK
• GPS INFORMATION
• YAW RATE
• PC CARD INFO.
• ERROR MESSAGE TABLE
• VERSION
• MAP MATCHING
• GPS DETAIL