Part 3

Navigation System Diagnostic Mode

Yaw Rate Tuning

This diagnostic 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 diagnostic). When the sensor functions properly, the random changes in these two voltages 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, CW, or Set buttons. These are used for factory setup only.

Two tests are explained below. For large problems with the sensor values, the stationary test usually confirms whether the sensor is defective. For yaw rate issues related to driving, do the road test.

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 audio-navigation unit Audio-Navigation Unit Removal/Installation.

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 audio-navigation unit's yaw rate sensor is defective. You can touch Reset to clear ANG-Disp, and dotted lines.

If either test above fails, please enter Yaw rate sensor defective for the problem description, on the Navigation core return form.

NOTE: The CCW, CW, and Set buttons are disabled and cannot be activated.






Car Status

Use this screen to confirm that the audio-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 the ECM/PCM (audio-navigation unit connector A (24P) terminal No. 23)
a) OFF (0) when vehicle is not moving
b) ON (1) when vehicle is moving

The VSP comes from the ECM/PCM as a dedicated signal. Internally, the audio-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 taillight relay (audio-navigation unit connector C (8P) terminal No. 8)
a) OFF (0) when the shift lever is in any position other than reverse
b) ON (1) when the shift lever is in reverse

The Back signal is used by the audio-navigation unit to allow the map screen to show the VP moving backwards when in reverse. This signal is needed because the Speed Pulse does not indicate direction.






- ILL-Illumination Indication (audio-navigation unit connector A (24P) terminal No. 4)
a) OFF (0) when parking lights, or headlights are off
b) ON (1) when parking lights, or headlights are on

The navigation uses the signal to determine whether to put the navigation screen into the Day or Night brightness mode (Setup screen 1).

- ILL CANCEL
This item detects whether the illumination cancel function is in use.
a) OFF (0) when the dashlights brightness control button is less than 90 % brightness with the headlights turned on.
b) ON (1) when the dashlights brightness control button is more than 90 % brightness with the headlights turned on.

Version

This screen displays the current version information for the navigation system software. In addition, this screen allows the loading of updated software if requested by the factory, or instructed by a Service Bulletin. Software may be loaded from a CD or a PC card.

- Program Flash: Displays the version of the navigation software in memory.
- Program Disc: If displayed, this value represents the version of the navigation software on the navigation DVD.
NOTE: The last two letters of the Program Flash or DVD fields indicate which DVD is installed in the unit. The letters KA imply that a United States DVD is installed. If the letters are KC, then a Canada DVD is installed. (See coverage discussion below.)
- IPL, APL, DBOOT, and System uCom, are all for factory use.
- Model: For this model, the field should begin with SZT.
- Download: Do not touch, unless instructed by the factory.
Check any official Honda service website for more service information about navigation DVDs.





The navigation system uses a turquoise disc that is for the US market and contains maps for the contiguous 48 US states, and some southern portions of Canada. Customers wanting additional northern coverage in Canada, can purchase a Canada DVD by contacting the DVD fulfillment desk.

An older navigation DVD cannot be used in a audio-navigation unit that is uploaded with newer software. You may see this error if you order a new audio-navigation unit as it may arrive with a higher software version loaded into its memory.

You may also see this error if a customer inserted a newer navigation DVD into their unit. This is why it is never recommended that you show a customer a new navigation DVD by inserting it into their current vehicle. Once the newer software is uploaded, they will see an error message when they reinstall their original navigation DVD.





If you need to Download (install) an older software version into the audio-navigation unit, do this:

1. Install the original navigation DVD from the original navigation unit into the new audio-navigation unit.

2. Select Download in the Version menu. The confirmation screen appears.






3. Select YES on the confirmation screen. The navigation system reboots.






4. After the navigation system reboots, go into the System Diagnostic Mode and select ECU Info. diagnosis, then select Mem Clear. The navigation system reboots.

NOTE: This step is necessary to delete all of the unwanted software version and to initialize the navigation ECU memory. Do not use Mem Clear except when doing this procedure.

5. Check that the navigation display shows the map properly.

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