Part 1
Navigation System Diagnostic Mode
Start-up procedure and Diagnostic Menu
There are two ways to enter the diagnostic mode:
Method 1:
Start the vehicle When the globe screen appears, connect the SCS service connector. Navigation System Forced Starting of Display (With Navigation) to the navigation service connector located behind the navigation unit. Then turn the ignition switch to ON (II). The display will go directly to the diagnostic menu screen shown below.
NOTE: When finished troubleshooting, make sure to remove the SCS service connector.
Method 2:
Turn the ignition switch to ON (II). Use the navigation display hard buttons as described below:
Make sure the battery is in good condition then press and hold the three buttons MENU, MAP/GUIDE, and CANCEL), for about 5 seconds. The display screen goes directly to the Select Diagnosis Items menu shown below.
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)
- Monitor Check
- Unit Check
- Car Status
- F-CAN (System link)
- GPS Information
- Yaw Rate
- Tire Calibrate
- Functional Setup
- Version
- XM (HIP)
Factory diagnostic screen In Line Diag
NOTE: If the vehicle left the factory in the factory diagnostic mode, or if the navigation unit is replaced, you will see this screen every time you turn on the ignition.
When a navigation control unit is powered up for the first time at the factory or after replacement with a new or remanufactured navigation unit, the factory diagnosis screen (In Line Diag) appears. Normally the factory does the steps necessary to verify proper operation and terminate the factory diagnostic.
Until the proper confirmation sequence is done, the screen appears every time the vehicle is started.
Follow the steps below to prevent the screen from showing up in the future:
- Press and hold the buttons, MENU + MAP/GUIDE + CANCEL for about 5 seconds the Select Diagnosis items screen appears.
- Press and hold the Map/Guide button for 5-10 seconds a screen with a Complete button appears.
- Press Complete, then Return, and then turn the ignition switch to LOCK (0) for 5 seconds. Do not disconnect the battery during this period as the unit is saving the setting to the SRAM memory. The In Line Diag should not appear again.
- Restart the vehicle, and confirm normal operation by completing the TQI of the Navigation System Service Bulletin.
Navi System Link
- This diagnostic tests the cables connecting the navigation components. Ensure that the ignition switch is in the ON (II) position. When the diagnostic begins, you hear a bong sound. The system is in a Detecting mode, and is waiting for all items in white to be tested. This includes the navigation voice control TALK/BACK buttons, and microphone. Press the navigation TALK button on the steering wheel, and in a normal voice, say "testing." When the system is operating properly, the TALK indicator on the screen turns green, and the voice level indicator moves to at least the 6th bar to pass. The Cancel indicator turns green.
- If all of the communication lines connecting the system components, and the navigation TALK/BACK buttons/microphone check out OK (all block diagram items green), then the OK indicator turns green.
- If there is a problem with the system, the faulty system component items turn red, and the screen will show NG in red. Use the troubleshooting index, and other diagnostic screens to help locate the problem.
- The indication on the screen may not change until you cycle the ignition switch. After repairing the affected cable or system, repeat this diagnostic.
NOTE:
- Green boxes and a 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.
- A green box and link to the AcuraLink control unit (XM receiver) does not mean that the unit is receiving traffic information. Always verify that the client's account status is active, and compare to a known-good vehicle to ensure that there isn't a local coverage problem.
- Select Return to return to the Diagnosis Menu.
NOTE:
- The mic level indicator must reach the 6th bar or greater to pass the test.
- If the XM link is red or flashing red, go to audio system symptom troubleshooting, Symptom Troubleshooting or see XM (HIP) diagnostic screen.
Monitor Check
Overview of display unit
- The display unit communicates with the navigation unit over its own GA-Net bus. Information sent by the navigation unit to the display unit includes commands to control the LCD back light.
- The security system protects the navigation display unit by daisy-chaining the security signal through it, and then passing the signal to the audio unit.
- The illumination input from the gauge brightness control provides back lighting for the buttons surrounding the screen.
These screens allow you to troubleshoot the display unit. Select the item you want to troubleshoot, and follow the diagnostic instructions.
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 appear 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. Symptom Troubleshooting If the picture has lines in it or scrolls horizontally, or vertically, troubleshoot for a Composite sync problem. Symptom Troubleshooting
Gray Tone
This screen diagnoses problems with contrast. You should be able to see the changes from bar to bar across the scale. It is normal for the two bars on either side to appear the same. If you can't see changes from bar to bar, replace the navigation unit.
White Raster
This diagnostic screen checks for pixels that may be dead (off). The entire display must be white. If there are dead pixels, replace the navigation unit.
Black Raster
This diagnostic screen checks for pixels that may be stuck on. The entire display must be black. If pixels ate stuck on, replace the navigation unit.
Color 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.
Monitor Adjustment
This allows you to center the navigation display. 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.
Unit Check
To start the test, select the item you want to check.
- Display
- Radio
- Navi ECU
- PC Card Info
- Hard Key
Display
This diagnostic does additional checks on the communication bus between the control unit and the display. This test also checks the internal electronic functions.
- 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 has an open or short, replace the affected shielded harness.
- If the ROM or RAM is NG, replace the display unit.
- The version represents the software version in the display.
Radio
This test checks the connection between the audio unit and the navigation system. If NG is indicated, check for loose audio unit connectors.
NOTE: If the XM link appears red, but the radio link appears green in the navigation system link, refer to audio system symptom troubleshooting. Symptom Troubleshooting
Navi ECU
This screen looks for problems in the navigation unit. When you initiate this diagnosis, the navigation unit may freeze or delay up to a minute while the diagnosis runs.
NOTE: Do not try to end this diagnostic by pressing OK or Mem clear before it finishes, otherwise the system may reboot.
- If V-RAM or D-RAM is NG, replace the navigation unit.
- 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.
- DVD ROM represents the database version on the DVD. You can find this information in either the Setup Screen Version, or in the Diagnostic Screen Version.
- Serial No. should be the same as the serial number found on the underside of the navigation unit. You need this number to obtain the security code from the Interactive Network (iN) system.
- The Mem Clr is for factory use and should not be used unless instructed by the factory.
Selecting this will clear the client'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 display, "PC Card is not inserted."
NOTE: Do not insert any card or object into the slot.
If the factory provides a PC card and instructs you to insert it, the screen displays the Manufacturer, and Product Name as shown in the following screen.
Hard Key
This diagnostic tests the interface dial and the buttons that surround it. For this model, the interface dial and buttons do not use the GA-Net bus for communications.
To complete the test, touch each button or the vehicle's control panel, and move the interface dial to each indicated position. As each function is tested, the corresponding button on the display should highlight. To exit, push in and hold the selector knob.
NOTE: You cannot use the onscreen return button to exit this function
Car Status
Use this screen 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.
- VSP-Vehicle Speed Pulse from PCM (Pin 6 of 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 (see the Tire Calibrate diagnostic screen).
- BACK-Reverse indication from taillight relay (Pin 5 of C-connector)
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 navigation unit to allow the map screen to show the VP moving backwards when in reverse. This signal is needed because the Speed Pulse has no direction indication.
ILL CANCEL
This item detects whether the illumination cancel function is in use.
a) OFF (0) if illumination cancel is not selected
b) ON (1) if illumination cancel is activated
The illumination cancel function is activated by increasing the dash brightness to MAX using the + button. The CAN bus passes this information from the gauge assembly to the climate control unit. The climate control unit then passes this information to the navigation control unit using the U-ART BUS.
NOTE: This setting is unaffected by the display mode hard button located below and to the left of the interface dial.
- 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
The navigation uses the signal to determine whether to put the navigation screen into the Day or Night brightness mode. (Setup screen 1)
- DVD Lid-senses if the DVD door is open
a) (Close) when the door is closed
b) (Open) when the 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. Service and Repair
F-CAN System Link
F-CAN (Fast Controller Area Network) passes information between processors on the network. For example, the F-CAN network passes trip computer information between the gauge and the navigation unit for the trip computer cooling fan function. The F-CAN network uses a communication protocol that transmits data at 500 Kbps.
- 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.
- For more details on troubleshooting the F-CAN.
