Navigation System ('03-04 Models) Acura MDX I

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General Operation

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

Anti-Theft Feature

The navigation system and audio unit have a coded theft protection circuit. Be sure to get the customer's 4-digit navi and 5-digit audio anti-theft security code numbers before

1. Disconnecting the battery.
2. Disconnecting the navigation unit 8P connector.
3. Removing the No. 11 (10 A) fuse from the passenger's 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 will need the serial number from the navigation unit. You can view the serial number in the Navi ECU diagnostic screen or find it on a label on the underside of the navi unit that is located in the trunk (see UNIT CHECK ).

When replacing the navigation unit, be sure to give the customer the new 4-digit 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 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 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 can take as long as 45 minutes).
2. 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.
3. When the satellite signals are blocked by tall buildings, mountains, tunnels, large trees, inside parking structures or large trucks.
4. 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.

The accuracy of GPS is reduced during these instances

1. Metallic window tinting above or to the side of the GPS antenna.
2. When only two satellite signals can be received (At least four satellite signals are required for accurate positioning).
3. When the satellite control centers are experiencing problems.
4. When driving near high tension power lines.
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.

Muting Logic

Whenever the navigation system is giving guidance, all of the speakers are muted. When the voice control system is being used, all of the speakers are muted.

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 is an infrared system, so there is no need to press hard. If a touch switch does not function immediately, shift your finger slightly, and touch it again. NOTE: Input may be affected by direct sunlight.

Symptom Duplication

1. When the symptom can be duplicated, verify that it is not a characteristic of the system. Review the navigation 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 aftermarket 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 5-digit anti-theft codes for the radio and the 4-digit code for the navigation system, and write down the presets. Also obtain any PGM-FI or transmission DTCs and freeze frame date (which will be lost when the 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 presets, and adjust 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 navigation anti-theft security code to "unlock" the system
2. GPS initialization (may not be needed depending on 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 number before

1. disconnecting the battery
2. disconnecting the navigation unit 8P connector
3. removing the No. 11 (10 A) fuse from the passenger's 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.

DVD LABEL COLOR IDENTIFICATION

Customers may obtain navigation DVDs from a variety of sources (from friends, Internet auctions, etc.) outside of the normal ordering process. If they install an incorrect DVD, it can produce an error message, or cause the navigation system to malfunction. The DVD for this model has an ORANGE label.

The following DVDs will not work in the Acura navigation system

1. Acura navigation DVDs with a color other than ORANGE
2. Map software programs manufactured by other companies
3. DVD movies, or DVDs containing audio recordings
4. Copies of an original Acura DVD (DVD-R/RW)

Obtaining A Navigation DVD

If the Navigation DVD is lost or damaged, or you require 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 purchase. Updated DVDs are available for purchase usually in the fall of each year.

For general questions about whether a city is covered, view the "map coverage" link on the DVD order site. On the site, you enter a year and model, and then click on the "Coverage" link. You then select a state or province, and the cities listed.

Updated DVD's 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. Replacing a DVD just because there is a higher version number available is not always warranted. A higher version number DOES NOT necessarily mean it contains newer software for this model. The DVD contains software for ALL Acura models that use the same color DVD, and a revised number may or may contain software fixes or upgrades for this model. The DVD cannot be ordered through the Acura parts system.

Symptom Troubleshooting Index

Note. Also see the "Symptom Column"for the Navigation unit inputs and outputs for connectors A, B, C, D, and E for additional symptoms (see NAVIGATION UNIT INPUTS AND OUTPUTS FOR CONNECTOR A (20P) ).

SYMPTOM TROUBLESHOOTING INDEX

Overview (Refer To Diagram)

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 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 navigation system provides a trip computer function. The fuel economy display is calculated by data provided by the PCM. The PCM provides fuel pulses via the F-CAN bus, and a dedicated speed signal. The trip computer information is only approximate and will not usually agree with the customers actual fuel usage, or values from the odometer.

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. The dash brightness knob has no effect on the Navigation display for '03-'04 models.

The GA-NET bus provides communication between the navigation unit and the display unit. This bus also links the components in the audio-HVAC display module. The bus is used to pass button and touch-screen commands to the navigation unit. The audio unit uses the bus to control the other accessories (i, e, under seat CD changer).

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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, climate control unit, and the display 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 it processes the signal and transmits it to the speedometer and other systems.

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Charge Signal

The 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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Fuel Pulse and Fuel Level

The PCM sends a fuel pulse and fuel level signal to the navigation unit via F-CAN. This information is used to display mpg, range, and average fuel economy on the trip computer.

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Yaw Rate Sensor

The yaw rate 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 piezoelectric 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.

GPS PRECISION DESCRIPTION

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 and set the internal navigation clock.

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 color signal, then it transmits the signal to the display 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 the vehicle speed pulse (VSP) sensor.

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 a 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 and will take the least time.
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.
4. Minimize Toll Roads - Calculate a route that avoids, or minimizes travel on toll roads.
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 and the front speakers.

Note. The front and rear speakers are muted whenever the navigation system is giving guidance commands or is engaged in voice recognition.

Muting Signal Logic

The muting signal is used to ensure that the navi voice prompts are processed correctly if the radio is on or off. The navigation unit uses the voltage on the mute wire to determine if the audio is ON or OFF. If audio is ON (+12 V), the navigation unit will immediately output (300 ms) its audio upon muting. If audio is OFF (open), the navigation unit will wait 2.0 second until the audio "wakes-up." So if the mute line is open and the audio was ON, there would be a 1.7 second longer delay for the navigation audio output to be heard. The average customer would probable not notice the difference.

Clock Logic

The navigation unit uses GPS data to set and update its internal clock. The navigation system does not set the radio display clock. Consequently, the navigation time (by asking "What time is it") will probably disagree with the manually set time shown on the audio unit display.

DVD-ROM

The map data (including all scale rates) is 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 audio driving instructions from the navigation unit and transmits the instructions through the front speakers even when the audio system is in use.

Display Unit

The display unit uses liquid crystal display (LCD). The LCD is a 7-inch-diagonal, thin film transistor (TFT), stripe type with 280,800 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 is an infrared type with 20 vertical and 9 horizontal infrared rays to produce 180 sensing points. The display unit transmits the signal from each button and the touch screen commands to the navigation unit.

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Microphone (Mic)

Receives voice commands and transmits them to the navigation 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).

Glossary

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

VOICE RECOGNITION NAVIGATION SYSTEM GLOSSARY

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).

These items above the map screen show various methods to enter 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.

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FEMALE TERMINALS WIRE SIDE DESCRIPTION

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No Picture Is Displayed

Note. If there is no image only when in reverse, go to No Rearview Camera Picture is Displayed or Screen goes Black in Reverse troubleshooting (see NO REARVIEW CAMERA PICTURE IS DISPLAYED OR SCREEN GOES BLACK IN REVERSE ).

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1. Check the No. 11 (10 A) fuse in the passenger's under-dash fuse relay box, and reinstall the fuse if it is OK. Is the fuse 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. Open the navigation unit door and look for an error message "Navigation Unit Door is Open" or "No DVD Disc Installed Please Check System" to appear on the screen. Did the error message appear? YES - Go to step 5. NO - Go to step 6 .
5. Close the navigation unit door and unplug the navigation unit connector E (2P). Turn the ignition switch OFF, and then back to ACC (I). Does either message appear on the screen now? YES - Replace the GPS antenna. NO - Plug the navigation unit connector back in, then go to step 6.
6. Turn the ignition switch ON (II).
7. 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 8. NO - If the +B wire does not have voltage, repair open in the wire between the passenger's under-dash fuse relay box and the navigation unit. If the ACC wire does not have voltage, repair open in the wire between the driver's under-dash fuse relay box and the navigation unit.
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 (G501).
9. Check for continuity between display unit connector H (20P) terminal No. 10 and body ground. Is there continuity? YES - Go to step 10. NO - Repair an open in the wire between the display unit and G502.
10. Turn the ignition switch OFF.
11. Perform the forced starting of the display (see «FORCED STARTING OF DISPLAY»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ). 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/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ) to check the links. NO - Go to step 12.
12. Shield the display unit from the sun with your hand, and check that the display is black (only back light is ON). Can you see the back light? YES - Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ). NO - Replace the display unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ).

Picture Is Missing A Color Or Tone (In All Gear Positions)

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. Check for aftermarket accessories.

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1. Go into Diagnostic mode and use "RGB Color" diagnostic under Monitor Check (see «MONITOR CHECK»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__monitor-check) ). 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 unit connector B (20P).
4. Check for loose terminals at navigation unit connector A (20P) and display unit connector B (20P). Are there loose terminals? YES - Repair the terminal, then recheck. NO - Go to step 5.
5. Check for continuity between the appropriate terminals of navigation unit connector A (20P) to display unit connector B (20P) based on the missing color(s). DISPLAY UNIT CONNECTOR CHART Missing color Navigation unit connector A (20P) Display unit connector B (20P) Wire color Blue A11 B18 YEL Green A2 B9 RED Red A1 B8 WHT Is there continuity? YES - Go to step 6. NO - There is an open in the circuit between the display unit and the navigation unit. Check for poor connections or loose terminals at the display and navigation units. If a poor connection or loose terminal is found, replace the affected shielded harness.
6. Check for continuity between the appropriate terminals of the display unit connector B (20P) based on the missing color(s). DISPLAY UNIT CONNECTOR CHART Missing color Display unit connector B (20P) From To Blue B18 (YEL) B10 (BLK) B20 (BRN/BLK) Green B9(RED) B10 (BLK) B20 (BRN/BLK) Red B8 (WHT) B10 (BLK) B20 (BRN/BLK) Is there continuity? YES - There is a short to body ground in the circuit between the display unit and the navigation unit. Replace the affected shielded harness. NO - Replace the navigation unit. If the problem is still unresolved, replace the display unit.

Picture Has Lines/Rolls/Other Issues

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. 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 unit connector B (20P) terminal No. 18. Also check for a short to ground between display unit connector B terminal No. 19 and terminal No. 20. NO - Go to step 3.
3. Go into the Diagnostic mode and use "RGB Color" diagnostic under Monitor Check (see «MONITOR CHECK»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__monitor-check) ). Is the picture missing a red, green or blue color? YES - Do the troubleshooting for the picture is missing a red, green or blue color or tone (see «PICTURE IS MISSING A COLOR OR TONE (IN ALL GEAR POSITIONS)»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__picture-is-missing-a-color-or) ). NO - Go to step 4.
4. Turn the ignition switch OFF.
5. Substitute a known-good display unit, and recheck. Is the picture OK? YES - Replace the display unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ). NO - Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ).

Display 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, get the navigation system anti-theft codes. After troubleshooting, enter the navigation system anti-theft codes.

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1. Turn the ignition switch to ACC (I).
2. Go into the Diagnostic mode and use the "Touch Panel" diagnostic under Monitor Check (see «MONITOR CHECK»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__monitor-check) ) and, if necessary, the "Display" diagnostic under Unit Check (see «UNIT CHECK»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__unit-check) ). Do the buttons work properly? YES - System is OK. NO - Go to step 3.
3. Measure the voltage between body ground and display unit connector B (20P) terminal No. 1 and No. 2 individually. Is there battery voltage? YES - Go to step 4. NO - If the +B wire does not have voltage, check fuse No. 11 (10 A) in the passenger's under-dash fuse/relay box. If OK, repair the open in the wire between the passenger's under-dash fuse/relay box and the display unit. If the ACC wire does not have voltage, repair the open in the wire between the passenger's under-dash fuse/relay box and the display unit. If OK, check the ACC relay circuit.
4. Turn the ignition switch OFF.
5. Disconnect the display unit connector B (20P).
6. Check for continuity between display unit connector B (20P) terminal No. 10 and body ground. Is there continuity? YES - Go to step 7. NO - Repair the open in the wire between the display unit and body ground (G401).
7. Disconnect the navigation unit connector A (20P).
8. Check for continuity between body ground and display unit connector B (20P) terminal No. 5 and No. 15 individually. Is there continuity? YES - There is a short to body ground in the circuit between the display unit and the navigation unit. Replace the affected shielded harness. NO - Go to step 9.
9. Check for continuity between display unit connector B (20P) terminal No. 5 and navigation unit connector A (20P) terminal No. 10. Is there continuity? YES - Go to step 10. NO - There is an open in the circuit between the display unit and the navigation unit. Check for poor connections or loose terminals at the display and navigation units. If a poor connection or loose terminal is found, replace the affected shielded harness.
10. Check for continuity between display unit connector B (20P) terminal No. 15 and navigation unit connector A (20P) terminal No. 20. Is there continuity? YES - Substitute a known-good display unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ) and recheck. If problem is gone, replace the display unit. If problem is still present, replace the navigation unit. NO - There is an open in the circuit between the display unit and the navigation unit. Check for poor connections or loose terminals at the display and navigation units. If a poor connection or loose terminal is found, replace the affected shielded harness.

GPS Icon Is White Or Not Shown

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

1. Check for electronic aftermarket accessories (possibly hidden) mounted near the GPS antenna or the navigation unit. Are there any electronic accessories? YES - Disable 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/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ) to check the GPS antenna. Is "GPS Ant" icon red? YES - Use the "Navi ECU" diagnostic under Unit Check (see «UNIT CHECK»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__unit-check) ) to check for a kinked, crushed, or disconnected GPS antenna wire. If necessary, try a known-good GPS antenna. If icon is still red, replace the navigation unit. NO - Check that nothing is blocking the GPS antenna located under the dashboard and recheck. Substituted a known-good navigation unit, and recheck.

Voice Guidance Cannot Be Heard

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

Scheme 40

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

1. Press the display unit A/C INFO button, and select "set-up".
2. Check the volume setting for the navigation system. Is it set OFF? YES - Set the volume to 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. Some possible causes might be a lack of power or ground to the audio unit, or a short to ground in one of the speakers or speaker wires.
4. Go into the Diagnostic mode and use the "Navi System Link" diagnostic (see «NAVI SYSTEM LINK»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ) to check the radio. Is "Radio" icon red? YES - Troubleshoot the wiring and connectors between the navigation unit and the audio system. If OK, substitute a known-good audio unit and recheck. NO - Go to step 5.
5. Turn the ignition switch OFF.
6. Disconnect the navigation unit connector B (14P).
7. Check for continuity between body ground and navigation unit connector B (14P) terminals No .5 and No. 12 individually. Is there continuity? YES - Replace the affected shielded harness. NO - Go to step 8.
8. Disconnect the navigation unit connector A (20P).
9. Check for continuity between the navigation unit connector A (20P) terminal No. 15 and body ground. Is there continuity? YES - Repair short to body ground in the wire between the audio unit and the navigation unit. NO - Go to step 10.
10. Check for continuity between navigation unit connector B (14P) terminal No. 5 and the audio unit 20P connector terminal No. 13. Is there continuity? YES - Go to step 11. 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.
11. Check for continuity between navigation unit connector B (14P) terminal No. 12 and the audio unit 20P connector terminal No. 11. Is there continuity? YES - Go to step 12. 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.
12. Check for continuity between navigation unit connector A (20P) terminal No. 15 and the audio unit 20P connector terminal No. 14. Is there continuity? YES - For vehicle with touring package, go to step 13. For vehicles without touring package, go to step 17 . NO - Repair open in the wire between the navigation unit and the audio unit.
13. Disconnect the navigation unit connector D (16P) and the front amplifier unit 26P connector.
14. Check for continuity between body ground and navigation unit connector D (16P) terminal No. 1. Is there continuity? YES - Repair short to body ground in the wire between the navigation unit, the audio unit, and the front amplifier unit. NO - Go to step 15.
15. Check for continuity between navigation unit connector D (16P) terminal No. 1 and the audio unit 20P connector terminal No. 1. Is there continuity? YES - Go to step 16. NO - Repair open in the wire between the navigation unit and the audio unit.
16. Check for continuity between navigation unit connector D (16P) terminal No. 1 and the amplifier unit 26P connector terminal No. 5. Is there continuity? YES - Go to step 17. NO - Repair open in the wire between the navigation unit and the amplifier unit.
17. Substitute a known-good audio unit and recheck. Is the system OK? YES - Replace the audio unit. NO - For vehicles with touring package, go to step 18. For vehicles without touring package, replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ).
18. Substitute a known-good amplifier unit and recheck. Is the system OK? YES - Replace the amplifier unit. NO - Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ).

Voice Control Does Not Work/Respond

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 a 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 ceiling. 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. Before troubleshooting, write down the customer's radio station presets, and get the radio and navigation system anti-theft codes. After troubleshooting, enter the radio and navigation system anti-theft codes, and the radio station presets.

1. Go into the Diagnostic mode and use the "Mic Level" diagnostic the under Functional Setup (see «FUNCTIONAL SETUP»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__functional-setup) ) to check the operation of the TALK and BACK buttons. Are the TALK and BACK buttons operational? YES - Go to step 3 . NO - Go to step 2.
2. Substitute a known-good steering button assembly. Are the TALK and BACK buttons operational? YES - Replace the steering button assembly. NO - Check for an open or short to ground on navigation unit connector B (14P) terminal No. 10.
3. Use the "Mic Level" diagnostic under Functional Setup (see «FUNCTIONAL SETUP»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__functional-setup) ) 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 - Check for a loose front map light (microphone) assembly. If OK, check for an open or short to ground on navigation unit connector B (14P) terminals No. 6 and No. 14 and the microphone assembly. If found, replace the affected shielded harness.

Vehicle Position Icon Constantly Leaves Road, Moves Erratically, Is Very Far From Actual Position, Or Spins When Parked On Land Or Icon Will Not Move When Driving

1. Check the GPS icon on the navigation picture. Is the GPS icon white? YES - Do the troubleshooting for GPS icon is white or not shown (see «GPS ICON IS WHITE OR NOT SHOWN»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__gps-icon-is-white-or-not) ). NO - Go to step 2.
2. Go into the Diagnostic mode and use the "Yaw Rate" diagnostic (see «YAW RATE»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__yaw-rate) ) to check the yaw rate sensor.
3. Go into the Diagnostic mode and use the "Car Status" diagnostic (see «CAR STATUS»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__car-status) ) to check the vehicle speed pulse. Are the yaw rate sensor and vehicle speed pulse OK? YES - The problem may be a normal characteristic. Check to see if the problem occurs in the same place and in other like vehicles with the same DVD version. If it does, the problem could be in the database. Report the problem according to the Navigation system manual under "Reporting Errors". Go to step 4. NO - If the problem is the yaw rate sensor, replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ). If the problem is the vehicle speed pulse, troubleshoot the vehicle speed signal circuit.
4. Substitute a known-good navigation unit that has the same DVD version (transfer the DVD discs if necessary) 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 Manual under "Reporting Errors". NO - Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ).

DVD Screen Error Messages

Note. Check the Navigation System Manual for a list of common DVD screen error messages and the probable cause. Go into the Diagnostic mode and use the "Car Status" diagnostic (see CAR STATUS ) to check the status of the DVD lid.

1. Check the DVD-ROM reading surface for scratches. Are there scratches? YES - Replace the DVD-ROM (see «FORCED STARTING OF DISPLAY»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ). 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/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ).

No Rearview Camera Picture Is Displayed Or Screen Goes Black In Reverse

Note. The rearview camera only works when the vehicle is in reverse (R) and the reverse lights are on. 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. Check the rearview camera brightness setting. Use touch/info button to adjust.

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

1. Turn the ignition switch ON (II).
2. Check the fuses No. 9 and No. 13 in the passenger's under-dash fuse/relay box and fuse No. 8 in the driver's under-dash fuse/relay box. Are fuses OK? YES - Go to step 3. NO - Replace the fuse, and recheck.
3. Put the vehicle in Reverse. Do the reverse lights come on? YES - Go into the Diagnostic mode and use the "Car Status" diagnostic to check the back up signal. If OK, go to step 4. NO - Troubleshoot the backup light circuit.
4. Measure the voltage between body ground and the rearview camera control unit connector B (20P) terminal No. 1 and No. 2 individually. Is there battery voltage? YES - Go to step 5. NO - Repair open in the wire between the passenger's under-dash fuse/relay box and the rearview camera control unit.
5. Measure the voltage between the rearview camera control unit connector B (20P) terminal No. 11 and body ground. Is the voltage less than 0.2 V? YES - Go to step 6. NO - Repair open in the wire between the rearview camera control unit and body ground (G501).
6. Turn the ignition switch OFF.
7. Disconnect the rearview camera control unit connector A (7P) and rearview camera 6P connector.
8. Turn the ignition switch ON (II).
9. Measure the voltage between body ground and the rearview camera control unit connector A (7P) terminal No. 1, No. 2, No. 4, No. 5, No. 7 individually. Is the voltage more than 1 V? YES - Repair short to power in the wire between the rearview camera control unit and the rearview camera. NOTE: If terminal No. 5 is more than 0 V. Replace the affected shielded harness. NO - Go to step 10.
10. Turn the ignition switch OFF.
11. Check for continuity between the rearview camera control unit connector A (7P) terminal No. 5 and body ground, and between terminals No. 5 and No. 6. Is there continuity? YES - Replace the affected shielded harness. NO - Go to step 12.
12. Check for continuity between body ground and the rearview camera control unit connector A (7P) terminal No. 1, No. 2, No. 4, No. 7 individually. Is there continuity? YES - Repair short to body ground in the wire between the rearview camera control unit and the rearview camera. NO - Go to step 13.
13. Check for continuity between the rearview camera control unit connector A (7P) terminal No. 1 and No. 2, and the rearview camera 6P connector terminal No. 1 and No. 2 individually. Is there continuity? YES - Go to step 14. NO - Repair open in the wire between the rearview camera control unit and the rearview camera.
14. Check for continuity between the rearview camera control unit connector A (7P) terminal No. 4 and No. 5, and the rearview camera 6P connector terminal No. 3 and No. 4 individually. Is there continuity? YES - Go to step 15. NO - Replace the affected shielded harness.
15. Check for continuity between the rearview camera control unit connector A (7P) terminal No. 7 and the rearview camera 6P connector terminal No. 6. Is there continuity? YES - Go to step 16. NO - Repair open in the wire between the rearview camera control unit and the rearview camera.
16. Disconnect the navigation unit connector D (16P) and rearview camera control unit connector B (20P).
17. Turn the ignition switch ON (II).
18. Measure the voltage between body ground and the navigation unit connector D (16P) terminal No. 2, No. 10 individually. Is the voltage more than 1 V? YES - Replace the affected shielded harness. NO - Go to step 19.
19. Turn the ignition switch OFF.
20. Check for continuity between body ground and the navigation unit connector terminal No. 2, No. 10 individually. Is there continuity? YES - Replace the affected shielded harness. NO - Go to step 21.
21. Check for continuity between the navigation unit connector D (16P) terminal No. 2, No. 10 and rearview camera control unit connector B (20P) terminal No. 4, No. 5 individually. Is there continuity? YES - Go to step 22. NO - Replace the affected shielded harness.
22. Check the pinfits and recheck. If the problem is still present, substitute a known-good rearview camera and recheck. Is the rearview camera view shown? YES - Replace the rearview camera (see «REARVIEW CAMERA CONTROL UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ). NO - Go to step 23.
23. Substitute a known-good rearview camera control unit. Is the rearview camera view shown? YES - Replace the rearview camera control unit (see «REARVIEW CAMERA CONTROL UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ). NO - Go to step 24.
24. Substitute a known-good rearview camera. Is the rearview camera view shown? YES - Replace the rearview camera. NO - Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ).

The Rearview Camera Picture Is Missing A Color Or Tone, Or Picture Rolls

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. Disconnect the navigation unit connector D (16P) and the rearview camera control unit connector B (20P).
2. Check for loose terminals at the navigation unit connector D (16P) and the rearview camera control unit connector B (20P). Are there loose terminals? YES - Repair the terminal. NO - Go to step 3.
3. Check for continuity in the CAM circuits between the navigation unit connector D (16P) terminals No. 6, No. 7, No. 14 and body ground. Is there continuity? YES - Repair short to body ground in the circuit between the navigation unit and the rearview camera control unit. If necessary, replace the affected shielded harness. NO - Go to step 4.
4. Check for continuity in the CAM circuits between the navigation unit connector D (16P) terminals No. 6, No. 7, and No. 14 and the rearview camera control unit connector B (20P) terminals No. 20, No. 9, and No. 19. Is there continuity? YES - Substitute a known-good rearview camera control unit (see «REARVIEW CAMERA CONTROL UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ) and recheck. If the problem is still unresolved, replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ). NO - Repair open in the wire between the navigation unit and the rearview camera control unit. If necessary, replace the affected shielded harness.

Trip Computer - No Distance

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. If the Previous button on the Trip Computer screen is not active, make sure to answer OK to the Disclaimer screen. Verify the correct navigation unit is installed for this model. Go into the Diagnostic mode and use "Version" (see VERSION ).

1. Go into the Diagnostic Mode and use "Car Status" diagnostic (see «CAR STATUS»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__car-status) ) to check for a vehicle speed pulse (VSP). Is there a VSP when the vehicle is moving? YES - Check the CAN bus wires for an open or short to ground between navigation unit connector A (20P) terminals No. 8 and No. 18 and PCM connector B (56P) terminals No. 6 and No. 2. If OK, replace the navigation unit. NO - Check the VSP wire for an open or short to ground between navigation unit connector C (8P) terminal No. 6 and PCM connector B (56P) terminal No. 46.

Trip Computer - No Fuel Information

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. If the Previous button on the Trip Computer screen is not active, make sure to answer OK to the Disclaimer screen. Verify the correct navigation unit is installed for this model. Go into the Diagnostic mode and use "Version" (see VERSION ).

Do the "Navi System Link" diagnostic (see NAVI SYSTEM LINK ) to check the communication line between the PCM (Fl-ECU) and the navigation unit.

1. Go into the Diagnostic mode and use "Trip Information" diagnostic under Functional Setup (see «FUNCTIONAL SETUP»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__functional-setup) ) with the engine running. Are the values greater than zero? YES - The system is OK. NO - Check the CAN bus wires for an open or short to ground between navigation unit connector A (20P) terminals No. 8 and No. 18 and PCM connector B (56P) terminal No. 6 and No. 2. If OK, replace the navigation unit.

Trip Computer Distance To Empty Calibration Is Incorrect

Note. Check the F-CAN system links (see F-CAN System Link ). If NG, refer to the multiplex system in Body Electrical for DTC's and troubleshooting.

1. Check the fuel gauge. Does the fuel gauge operate properly? YES - Go to step 2. NO - Refer to «FUEL AND EMISSIONS»(/acura/mdx/i-2000-2006/remont/gauges-instrument-panels/#specifications__fuel-and-emissions) for fuel gauge troubleshooting.
2. Start the car.
3. Check the F-CAN system Link (see «F-CAN System Link»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__f-can-system-link) ). Does the diagnostic screen display "OK"? YES - Change the Trip Calibration Range Tuning to match the customer's expectations (see «FUNCTIONAL SETUP»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__functional-setup) ). NO - If the diagnostic screen displays "NG", refer to the «FUEL AND EMISSIONS»(/acura/mdx/i-2000-2006/remont/gauges-instrument-panels/#specifications__fuel-and-emissions) Section for F-CAN troubleshooting.

Navigation Cannot Control A/C

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 installed 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/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ). Is "Air-con" icon red? YES - Do the climate control system troubleshooting. NO - Check for an open or short to ground between display unit connector A (5P) terminals No. 2, No. 3, No. 4 and climate control unit connector A (16P) terminals No. 16, No. 15, No. 8. 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. Change the day/night mode under Set-up to AUTO, 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 2.
2. Go into the Diagnostic Mode and use the "Car Status" diagnostic to check for an ILL signal (see «CAR STATUS»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__car-status) ). 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 passenger's 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, then turn the ignition switch OFF, and turn the ignition switch ON (II). Does the system reboot? YES - The system is OK at this time. NO - Check the DVD 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/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__unit-check) ).

Vehicle Icon Wanders Across The Map (Does Not Follow A Displayed Road) Or Spins When Driving

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 electronic devices (possibly hidden) 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/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ), the Navi ECU diagnostic under "Unit Check" (see «UNIT CHECK»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__unit-check) ), the Car Status check (see «CAR STATUS»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__car-status) ), the GPS Information check (see «GPS INFORMATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__gps-information) ), the GPS Detail check (see «GPS INFORMATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__gps-information) ), and the Yaw Rate check (see «YAW RATE»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__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 for poor connections or loose terminals. Before troubleshooting, get the navigation system anti-theft codes. After troubleshooting, re-enter the anti-theft code, and re-initialize the navigation system. Aftermarket accessories or cell phone charger.

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/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__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, re-enter the anti-theft code, and re-initialize the navigation system. Aftermarket accessories or cell phone charger.

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. The vehicle may have been used as a demonstration vehicle at an event like an auto show. In these events, power is often jumpered to the navigation system so that the ignition key is not needed in the vehicle. At the end of the show, the jumper wire may not have been removed. Check the navigation unit "C" connector (8P) for a "non-factory" jumper wire in series with the factory cable. Is there a jumper wire? YES - Remove the jumper wire, and re-test. NO - Go to step 3.
3. The display or audio unit may have been jumpered behind the dash to allow the navigation system to run without the ignition key. Does the radio function with the ignition switch off? YES - Go to step 4. NO - Go to step 5 .
4. Remove the display unit and check to see if the audio 20P connector has a non-factory jumper wire in series with the factory connector. Is there a jumper wire? YES - Remove the jumper wire, and re-test. NO - Go to step 5.
5. Check the interior lights with the ignition switch off. Can you turn on the interior lights with the ignition switch off? YES - Troubleshoot the ACC circuit. NO - Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__navigation-unit-removalinstallation) ).

Start-Up Procedure And Diagnosis Menu

There are two ways to enter the diagnostic mode

Scheme 59

1. Connect the SCS connector (see step 2 ) 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 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 approximately 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) Monitor Check Unit Check Car Status GPS Information Yaw Rate Tire Calibrate Functional Setup Version

Scheme 60

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 voice control (TALK/BACK) buttons, and microphone. Press the 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 BACK button. This should cause the "Cancel" indicator to go green.
2. If all of the communication lines connecting the system components, and the 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 or "Exit Diag" to exit. NOTE: The mic level indicator must reach the 6th bar or greater to pass the test.

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 fuel pulses between the PCM and the navigation unit for the trip computer function. The F-CAN network uses a communication protocol that transmits data at 500 Kbps.

Scheme 61

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.

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 62

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 (IN ALL GEAR POSITIONS) ). 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 ).

Scheme 63

Gray Tone

This screen looks for 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 64

White Raster

The entire display must be shown in white.

Scheme 65

Black Raster

The entire display must be shown in black.

Scheme 66

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 67

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 68

Touch Panel

The panel touch sensing system consists of 10 horizontal and 20 vertical infrared beams. Touching the screen blocks both a horizontal and a vertical beam. Every possible touch position is shown on this diagnostic screen. Touching one of these areas should cause its color to reverse, and sound a "beep". If any areas of the screen either don't respond, or respond at some other location when touched, then replace the display unit. The "Display" diagnostic under in Unit Check provides an additional method to determine if one of the infrared sources or detectors is bad.

Note. Direct sunlight can affect this test by falsely triggering the infrared detectors, so perform this diagnostic inside or in a shaded area.

Scheme 69

Unit Check

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

Scheme 70

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.

Scheme 71

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. If the touch sensor is NG, then check for zeros in the "X", or "Y" values below.
4. The version represents the software version in the display.
5. The "1" following the X, indicate the 20 working vertical infrared beams/receptors (from left to right). The "1s" following the Y, indicate the 10 working horizontal beams (from top to bottom). If any one of the "1s" is a zero, this indicates that there is a problem with one of the beams or receptors. Check all around the inside rim of the navigation screen for dirt or anything that may be blocking a beam. If nothing is found, replace the display unit. See the display unit diagram in the "System Description" showing the infrared beam layout. Individual touch positions can be verified by running the "Touch Panel" diagnostic under Monitor Check. NOTE: When selecting this diagnostic from "Unit Check," quickly remove your fingers from the touchscreen to avoid a false detection of the infrared sensors.

Navi ECU

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

Note. This diagnostic cannot be canceled when running.

Scheme 72

1. "ROM (Application)", and "ROM (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 order a new 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 slot, and the screen should say, "PC Card is not inserted."

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

Scheme 73

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 74

Car Status

This screen is used to confirm that the 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 - (OBSOLETE-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 PCM (Pin 6 of C-connector) OFF (0) when vehicle is not moving ON (1) when vehicle is moving

The VSP comes from the 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 (seethe Tire Calibrate diagnostic screen).

1. BACK - Reverse indication from taillight relay (Pin 5 of 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 and to activate the rearview camera. This signal is needed because the Speed Pulse has no direction indication.

1. CHG (CAN) - Charge indicator from 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. 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 on

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, then most likely their passenger may be accidentally kicking the door open with the heel of their shoes. Take a piece of clear tape and cover the door latch handle to prevent accidental opening.

Scheme 75

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 24 "active" GPS satellites in orbit. Because satellites fail, and have to be removed from service, spares 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 outside, away from buildings, tall trees, and high-tension wires for at least 10 minutes with the engine running.

Scheme 76

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/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__gps-icon-is-white-or-not) ).
2. The "Current Position" shows latitude, longitude, and elevation (in meters). 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 2 "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. Most of the information shown on this screen is for factory use, however some of the data can indicate partial GPS signal interference.

Scheme 77

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, and can be used to detect intermittent speed sensor problems.
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»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models__global-positioning-system-gps) " 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

GPS DETAIL SCREEN VALUES

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"

Scheme 78

1. "Sensor" indicates the voltage output from the yaw rate sensor. It should indicate about 2.500 volts when stopped.
2. "Offset" is the reference voltage or standard within the yaw rate sensor. It also should indicate about 2.500 volts 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 volts when stopped. If either reads zero, or 5.000 volts, 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 Normal Offset 2.526 V Sensor 2.516-2.536 V Abnormal Offset 2.526 V Sensor 2.623 V Example: Car turning Normal Offset 2.526 V Sensor 2.678 V (right turn) 2.478 V (left turn) Abnormal Offset 2.526 V Sensor 2.623 V (no change on turns)
6. Auto tuning should always be on. If it is off, turn it on.
7. "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.
8. The settings "CCW Cal Factor", "CW Cal Factor", and "Set" are for factory use only. THIS SHOULD NEVER BE USED.

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 initialization, it begins at 0, and increases to 10 as the navigation system is used.

Scheme 79

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 80

Trip Information

This screen shows current internal values used for trip computer calculations. They are for factory use only.

Scheme 81

1. Simulation "Start" is for factory use.
2. "Data Save" should always be on. It is for factory use only.

Trip Calibrate

By holding down the MENU button while on the "Trip Information" screen, you will see the screen below. This screen allows you to adjust the vehicle range (distance to empty).

1. "Calc. RANGE" is the calculated value.
2. "Disp. RANGE" is the distance displayed on the trip computer "Range" field. If it reads "0", the vehicle will have enough fuel to travel approximately 20 miles.
3. Range Tuning can be adjusted "+" or "-" to adjust the range to empty. It is recommended that this value not be changed.

Note. Setting the range offset too low (+10) could result in the vehicle running out of gas before the display reads "0". Make changes slowly when changing this value.

Scheme 82

Log Data

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

Scheme 83

Scheme 84

1. Normally there is no card in the "PC Card slot", and the PC slot door should always be closed.
2. However, if the factory provides a PC card and instructs you to insert it into the card slot (label side up), and then slide the PC Card 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 85

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 system. The microphone is located near the map light in the ceiling. It is directional, and works best if the voice is coming from the drivers seat.

Scheme 86

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 must move at least to the 7 th bar. If the Talk indicator on the screen does not briefly become green, then check the wiring from the TALK button to the navigation unit. If there is no "Mic Level" movement when you speak, then you should check the wire running from the microphone to the control unit.
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 87

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 does not apply to this model. For other models, this screen determines whether to automatically send the navigation time to the upper display. The navigation time can be found in the Setup screen 2 "Adjust Time Zone/Clock" setting.

Scheme 88

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

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 89

Outside Temp. Cal.

The navigation unit receives the outside temperature signal from the climate control unit, then the display unit indicates the outside temperature. If you think the indicated temperature different from actual temperature, calibrate the indicated temperature using this screen.

Std. button: Return to default setting.

"UTRIF; button: 1° F up

"DTRIF" button: 1° F down

Set button: Set the calibration setting.

Scheme 90

Note. In almost all cases, the temperature does not actually need adjustment. The customer is typically unaware that there is damping logic deliberately built into the temperature reading to avoid temperature spikes due to the hot pavement, or heat from the vehicle in front of you. The damping logic causes sluggishness that the customer interprets as inaccuracy.

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 21H, and identifies the control unit as a MDX part. Do not substitute any other control units with other model codes.

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

Scheme 91

Note. If any model number other than 21H 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

Scheme 92

Scheme 93

1. Slide the passenger's seat (A) forward.
2. Connect the SCS service connector (B) to the navigation service check connector (C) located behind the navigation unit.
3. Turn the ignition switch ON (II).
4. Check that the system starts up and then changes to the "Navi System Link" screen.
5. If the display does not turn on, turn the ignition switch OFF, press and hold the A/C-INFO button (A), push and hold the joystick (B) up, then turn the ignition switch to ACC (I). NOTE: If the system fails to display the "Navi System Link" screen, refer to No picture is displayed (see «SYMPTOM TROUBLESHOOTING»(/acura/mdx/i-2000-2006/remont/navigation-system/#navigation-system-03-04-models) ).

DVD-ROM Replacement

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

Scheme 94

1. Slide the passenger's seat (A) to the rear.
2. Turn the ignition switch ON (II).
3. Open the front cover (B) of the navigation unit.
4. Press the EJECT button (C).
5. Remove the DVD-ROM.
6. Insert the new DVD-ROM.
7. Close the front cover. Do not turn the ignition switch OFF until data is down loaded to the navigation unit. NOTE: After servicing, the front cover must be closed. If you start up the navigation system with the front cover open, the display will indicate. "Navigation unit door is open or No DVD Disk installed. Please check system".

Navigation Unit Removal/Installation

Note. If the navigation unit is replaced or disconnected, a Map Match must be done (see MAP MATCHING ).

Scheme 95

1. Slide the passenger's seat (A) to the rear.
2. Remove the navigation unit bracket (B) from the passenger's seat.
3. Remove the bracket from the navigation unit (C).
4. Install in the reverse order of removal.

Scheme 96

1. Remove the center panel (see «DASHBOARD CENTER PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/exteriorinterior-trim/#dashboard) ).
2. Remove the display unit/audio unit.
3. Remove the bracket (A), then remove the display unit (B) from the audio unit (C).
4. Install in the reverse order of removal.

Scheme 97

1. Remove the right rear side trim panel (see «TRIM REMOVAL/INSTALLATION - TAILGATE AREA»(/acura/mdx/i-2000-2006/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-tailgate-area) ).
2. Remove the rearview camera unit (A).
3. Install in the reverse order of removal.

Scheme 98

1. Remove the tailgate trim panel (see «TRIM REMOVAL/INSTALLATION - TAILGATE AREA»(/acura/mdx/i-2000-2006/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-tailgate-area) ).
2. Remove the rear license trim.
3. Remove the rearview camera (A).
4. Install in the reverse order of removal.

Scheme 99

1. Remove the center panel (see «DASHBOARD CENTER PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/exteriorinterior-trim/#dashboard) ).
2. Loosen the two screw-bolts (A).
3. Pull and pry up the GPS antenna (B), then remove it.
4. Install the parts in the reverse order of removal.

Scheme 100

1. Remove the driver's airbag assembly (see «DRIVER'S AIRBAG REPLACEMENT»(/acura/mdx/i-2000-2006/remont/airbag/#srs-supplemental-restraint-system) ).
2. Disconnect the 5P connector (A), the IP connector (B) and the 1P connector (C) from the radio remote switch (D).
3. Measure the resistance between the 5P connector No. 2 terminal and 1P connector (C) in each switch position according to the table. POSITION AND RESISTANCE DESCRIPTION Position Resistance OFF about 10 k ohms Talk about 3.2 k ohms Back about 1.6 k ohms
4. If the resistance is not as specified, go to step 5.
5. Remove the four screws and the cruise control set/resume/cancel switch (E) from the steering wheel.
6. Remove the four screws and the radio remote switch.

See also:
• FUEL AND EMISSIONS
• DASHBOARD CENTER PANEL REMOVAL/INSTALLATION
• TRIM REMOVAL/INSTALLATION - TAILGATE AREA
• DRIVER'S AIRBAG REPLACEMENT
• UNIT CHECK
• GPS ICON IS WHITE OR NOT SHOWN
• NAVIGATION UNIT INPUTS AND OUTPUTS FOR CONNECTOR A (20P)
• SYSTEM INITIALIZATION
• PICTURE IS MISSING A COLOR OR TONE (IN ALL GEAR POSITIONS)
• PICTURE HAS LINES/ROLLS/OTHER ISSUES
• DISPLAY UNIT BUTTONS OR TOUCH SCREEN BUTTONS DO NOT WORK OR RESPOND PROPERLY
• VOICE CONTROL DOES NOT WORK/RESPOND
• VEHICLE POSITION ICON CONSTANTLY LEAVES ROAD, MOVES ERRATICALLY, IS VERY FAR FROM ACTUAL POSITION, OR SPINS WHEN PARKED ON LAND OR ICON WILL NOT MOVE WHEN DRIVING
• NO REARVIEW CAMERA PICTURE IS DISPLAYED OR SCREEN GOES BLACK IN REVERSE
• THE REARVIEW CAMERA PICTURE IS MISSING A COLOR OR TONE, OR PICTURE ROLLS
• TRIP COMPUTER-NO DISTANCE
• TRIP COMPUTER-NO FUEL INFORMATION
• NAVIGATION CANNOT CONTROL A/C
• SYSTEM LOCKS UP CONSTANTLY
• NAVIGATION DRIVES BY ITSELF WHEN PARKED
• RGB COLOR
• NAVIGATION UNIT REMOVAL/INSTALLATION
• MONITOR CHECK
• GPS INFORMATION
• FUNCTIONAL SETUP
• YAW RATE
• CAR STATUS
• VERSION
• F-CAN System Link
• MAP MATCHING
• GLOBAL POSITIONING SYSTEM