Part Two
Navigation System Diagnostic Mode
Car Status
Use this screen to confirm that navigation unit is properly receiving input signals. Signals equal to (0) are OFF, and signals equal to (1) are ON. If the value on the display does not match the actual vehicle status, then check the wire carrying the signal.
- VSP-Vehicle Speed Pulse from PCM (Pin 6 of navigation unit C-connector)
a) OFF (0) when vehicle is not moving
b) 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.
- BACK-Reverse indication from multiplex integrated control unit (Pin 5 of navigation unit C-connector)
a) OFF (0) when shift lever is in any position other than reverse
b) 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 trigger the back-up camera. This signal is needed because the Speed Pulse does not provide any directional information to the system.
- ILL-Illumination Indication (Pin 5 of navigation unit A-connector)
a) OFF (0) when parking lights, or headlights are off
b) 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)
- DVD Lid-senses if DVD door is open
a) (Close) when door is closed
b) (Open) when door is open
The navigation unit uses a microswitch to detect this.
If open is indicated when the door is closed, replace the navigation unit.
- ILL CANCEL
a) OFF (0) when dash brightness is not set to maximum brightness
b) ON (1) when headlights are on, but dash brightness is set to max brightness
This item detects whether the illumination cancel function is in use. The illumination cancel function is activated by rotating the dash brightness knob fully clockwise (full bright) when the headlights off (day mode) and on (night mode). The signal is passed from the gauge control module by B-CAN to the climate control ECU. From there the signal travels to the navigation unit on the climate UART bus.
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.
Nearby obstructions, like tall buildings, will block satellites in that direction. That is why it is necessary to troubleshoot GPS reception issues in an open area. The satellites 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 are always parked in orbit, ready to be activated. This is why the PRN (satellite ID number) can be greater than 24.
NOTE:
- When you use this screen for troubleshooting, park the vehicle outside, away from buildings, tall trees, and high-tension wires for at least 10 minutes with the engine running.
- Metallic window tinting on the front window or after-market electronic accessories mounted near the navigation unit, GPS antenna, or navigation display can interfere with GPS acquisition.
- The Number of Satellites box shows the number of acquired satellites (maximum of 12). It should contain 4 or more icons. If not, troubleshoot for GPS icon is white, or not shown GPS Icon Is White or Not Shown.
- The Current Position shows latitude, longitude, and elevation (in meters). If there are less than 4 satellites, the elevation can be grossly inaccurate.
- 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 appears. 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.
NOTE: The data shown is an example only.
- The box TS/AS and HDop/VDop is for factory use.
- The Speed and Direction information is updated in real time when driving, and can be used to detect intermittent speed sensor problems.
- The Date/Time Information is the same as in Setup screen 2 Adjust Time Zone/Clock.
- If the 3D icon is shown above the yellow dots, this implies that at least 4 satellites are available for map positioning, and the GPS indicator on the map screen will be green. See the Global Positioning System detailed explanation in the System Description Description and Operation.
- 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).
The table of values as shown define the terms at the top of the columns in the GPS Detail screen.
Yaw Rate
This diagnosis checks the yaw rate sensor in the navigation 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 Description and Operation.
- Sensor indicates the voltage output from the yaw rate sensor. It should indicate about 2.500 V when the vehicle is stopped.
- Offset is the reference voltage or standard within the yaw rate sensor. It also should indicate about 2.500 V when the vehicle is stopped.
- A sensor output voltage LOWER than the Offset voltage indicates that the vehicle is turning to the right.
A sensor output voltage HIGHER than the Offset voltage indicates that the vehicle is turning to the left.
- The yaw rate offset and sensor should both indicate about 2.500 V when the vehicle is stopped. If either reads zero or 5.000 V, replace the navigation unit.
- The yaw rate offset and sensor should be within +/-0.01 V of each other when the vehicle is stopped. The sensor value should change relative to the offset as the vehicle turns while driving. If not, replace the navigation unit.
Example: Vehicle stopped
Example: Vehicle turning
- Auto tuning should always be on. If it is off, turn it on.
- 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.
- The settings CCW Cal Factor, CW Cal Factor, and Set are for factory use only. THIS SHOULD NEVER BE USED.
NOTE: Do not try to tune the yaw rate sensor without instructions from American Honda.
Yaw Rate Tuning
This diagnosis allows you to graphically display problems with the yaw rate sensor.
- The ANG-Disp value accumulates any differences between the offset, and sensor voltages (see Yaw Rate diagnosis). When the sensor functions properly, the random changes in these two voltage generally cancels out, so the value is 0. However if one voltage is consistently higher than the other, then the ANG-Disp value accumulates the constant change.
- The Reset button temporarily clears the angular accumulation (ANG-Disp), and clears the display dots.
- Do not touch the CCW or CW, or Set buttons. These are used for factory setup only.
For gross problems with the sensor, the stationary test usually confirms whether the sensor is defective. For yaw rate issues related to driving, do the road test described below.
1. Stationary test: If the VP icon spins in place and the ANG-Disp value slowly increases or decreases in value, the yaw rate sensor is defective. Replace the navigation unit.
2. Road test: Drive the vehicle on a very straight road. Enter the diagnostic mode, select Yaw rate, and touch the Tuning button. While driving down a straight road, the white dots should trace a straight line across the screen. However, if you are driving on a straight road, and you notice the dots constantly dropping down or heading up as you drive, the navigation unit's yaw rate sensor is defective. You can touch Reset to clear ANG-Disp, and the dotted line.
3. If either test fails, please enter Yaw rate sensor defective for the problem description, on the Navigation core return form.
Tire Calibrate
As the vehicle moves, the navigation system receives speed pulses from the PCM. These pulses are converted using a conversion factor to a mph speed that moves the vehicle position (VP) on the map. The navigation system has an internal tuning function that generates and refines this factor based on actual driving. The Level indicates the status of the tuning. At navigation initialization, it begins at 0, and increases to 10 as the navigation system is used.
- The Auto Tuning is factory set to ON, and should remain on.
- The Study indicates the tuning status. If it is less than 10, the unit is still calibrating.
- 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.
Log Data
This screen allows the factory to collect log data to troubleshoot navigation system issues.
- Normally there is no card in the PC card Slot, and the PC card slot door should always be closed. The screen should look like below.
- However, if the factory provides a PC card, insert it into the card slot (label side up), and then slide the PC card slot door shut. Follow the factory procedure for gathering test data and properly ending the test.
GPS Send Time
This screen is for factory use only. It allows adjustment of the GPS time. This display updates in real time.
- GPS Time is the time as received from the GPS satellites. It is in Greenwich Mean Time (GMT).
- 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).
- 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.
- Date, Hour, Minute, and Set should not be used.
Demo Mode
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 a route to a destination when the vehicle is stationary.
Mic Level
This diagnosis allows you to independently test the microphone and the navigation TALK and navigation 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.
- Press the navigation TALK button on the steering wheel, wait unit you hear a beep and in a normal voice say "testing" The Talk indicator on the screen should momentarily turn green, and the text Now Recording... should appear in yellow. If the Mic Level indicator on the screen does not briefly turn green, check the wiring from the navigation 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 navigation unit.
- If the Mic Level bar is full or almost full without you speaking or other back ground noise, replace the microphone and recheck.
- Press the navigation BACK button on the steering wheel. This should cause the Cancel indicator on the screen to momentarily turn green. If it does not briefly turn green, check the wiring from the steering wheel navigation BACK button to the navigation unit.
NOTE:
- The Mic Level indicator must reach the 6th bar or greater to pass the test.
- If the radio is off, and there is movement in the indicator-even without speaking, then ensure that the vents are not blowing on the microphone.
- This should resolve voice control complaints such as:
- sometimes the system does not understand my commands.
- I have to shout at the navi for a command to be recognized.
- The system just says "pardon".
Save Users Memory
When replacing the navigation unit, this function allows the dealer to transfer the customer's personal data to the new navigation unit. The transferred information includes their Setup settings, and personal addresses. The dealer inserts a PC card to the navigation unit, and then selects the Save Users Memory function. The two functions in this diagnostic screen are EXPORT and IMPORT. EXPORT saves the customer's data to the PC card, and IMPORT moves the PC card files to the new navigation unit.
Before starting this function, see the PC Card FAQs for information regarding PC cards, and how to use this function.
1. Select EXPORT button to move the customer's data from the original navigation unit to the PC card. Select YES on the Export User Data Confirmation screen. The process takes only a couple of seconds. The system stores two files on the card.
NOTE: If the EXPORT button is grayed out, check the PC card's edge connector, and the pins inside the navigation unit (with a flashlight) for damage.
2. After installing the customer's original DVD in the new navigation unit, allow the system to boot up. Insert the PC card in the new navigation unit and enter the Save Users Memory in the navigation system diagnostic mode.
3. Select IMPORT button to move the two files stored by the Export process from the PC card to the new navigation unit. Select YES on the Import User Data Confirmation screen. When the transfer is finished (a few seconds) the system will automatically reboot. After the system reboots, remove the PC card from the PC slot.
NOTE: If the IMPORT button is grayed out, check if the Model and the Program Flash shown on the Version screen are the same.
PC Card FAQs
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 SHJA ('07 model) or SHJX ('08-10 models), and is for factory use only. This code is stored on a chip in the navigation unit. Therefore, every model has a unique part number for the navigation unit.
NOTE: If any model number other than SHJA or SHJX is displayed, replace the navigation unit with the correct part. The model code tells the navigation unit what software to load off the DVD.
Do not use Download, unless instructed to do so by the factory.
'07 model
'08-10 models (With premium audio system)
'08-09 models (Without premium audio system)
There are two navigation DVDs produced for this model.
- The DVD labeled United States is for the US market and contains maps for the contiguous 48 US states, Hawaii, and some southern portions of Canada.
Customers wanting additional northern coverage in Canada, can purchase a Canada DVD by contacting the DVD fulfillment desk.
- The DVD labeled Canada, is for the Canada market, and contains maps for all of Canada, plus some of the northern US states. If customers with this DVD require full US coverage (including states like Florida and Texas), they may purchase a United States DVD by contacting the DVD fulfillment desk.
Error Message Table
