Part 2
Navigation System Diagnostic Mode
GPS
If GPS indicates NG (Antenna), then check the entire GPS antenna wire from the audio-navigation unit to the GPS antenna. If the wire is crushed or damaged, substitute a known-good GPS antenna Service and Repair. If the diagnostic reads OK, replace the original GPS antenna Service and Repair. If the diagnostic still reads NG (Antenna), replace the audio-navigation unit Audio-Navigation Unit Removal/Installation.
Select information to see the GPS satellite details.
ECU Info.
This screen looks for problems in the audio-navigation unit. When you initiate this diagnosis, the audio-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 audio-navigation unit Audio-Navigation Unit Removal/Installation.
- DVD lid displays the position of the audio-navigation unit lid.
- Program Flash: Displays the version of the navigation software in memory.
- Program on DVD: If displayed, this value represents the version of the navigation software on the navigation DVD.
- DVD version 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 audio-navigation unit.
You need this number to obtain the security code from the Interactive Network (iN) system.
- Model: For this model, the field should begin with SZT.
- Mem Clear is used to initialize the memory in the navigation ECU, and to delete the old data program completely. Do not select Mem Clear except when using the Download procedure in Version.
Selecting this will clear the customer's settings, personal information, GPS orbital data, and anything else stored in memory.
HFL
This checks the four-wire communication bus between the HandsFreeLink control unit and the audio-navigation unit.
Hard Key
This diagnostic screen checks the status of each of the hard buttons surrounding the navigation display. When you press each hard button, the corresponding item on the screen should flash blue. Touch the return key, or press and hold the joystick to exit.
NOTE: It is normal for the VOL (+, -), CH (+, -) and MODE button to be inactive. Press the steering wheel remote buttons VOL (+, -), CH (+, -) and MODE to check their status on the screen.
Yaw Sensor
This screen gives a quick test of the yaw sensor functionality based on the two voltages Sensor and Offset. For more information see the Yaw Rate diagnostic.
DVD
This diagnostic tests the navigation DVD reader.
NOTE: If this test fails, remove the navigation DVD, clean it, and retest before ordering a new navigation DVD.
Aircon
This diagnostic tests the climate bus connection (AC-SI and AC-SO) between the audio-navigation unit and climate control unit. Make sure the engine is running for this test.
NOTE: If this test is run with the ignition switch in ACCESSORY (I), the result will be NG.
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. Follow the instructions provided by the factory to complete the test.
Functional Setup
Select the item you want to check.
- Save Users Memory
- Demo Mode
- Mic Level
Save Users Memory
When replacing the audio-navigation unit, this function allows the technician to transfer the customer's personal data to the new audio-navigation unit. The transferred information includes customer setup settings and personal addresses. The dealer inserts a PC card into the audio-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 audio-navigation unit.
You need to insert a PC card for these functions to work.
Before starting this function, see the PC Card FAQs for information regarding PC cards, and how to use this function.
1. Select the EXPORT button to move the customer's data from the original audio-navigation unit to the PC card. 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 audio-navigation unit (with a flashlight) for damage.
2. After installing the customer's original navigation DVD in the new audio-navigation unit, allow the system to boot up. Insert the PC card into the new audio-navigation unit and enter the Save Users Memory in the navigation system diagnostic mode.
3. Select the IMPORT button to move the two files stored by the Export process from the PC card to the new audio-navigation unit. Select YES on the Import User Data Confirmation screen. When the transfer is finished (a few seconds) the system automatically reboots. 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 for the two (original and replacement) audio-navigation unit.
Demo Mode
This screen is for factory use only, and should always be set to OFF. Occasionally the DEMO 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. The Speed Rate changes the speed of the demo mode.
Mic Level
This diagnostic 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 on the ceiling. The microphone can now isolate the driver's voice even when there is noise or other conversations in the vehicle. To properly check the microphones, make sure you are sitting in the driver's seat.
- Press the navigation TALK button on the steering wheel, wait until 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 talk indicator shown on the screen does not briefly turn green, check the wiring from the steering wheel navigation TALK button to the audio-navigation unit. If there is no Mic Level movement when you speak, then you should check the wires running from the microphone to the HandsFreeLink control unit and the audio-navigation unit. If the wires are OK, the microphone must be faulty; replace the microphone.
- 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 audio-navigation unit.
Coverage Area
This screen allows the dealer to select the area that applies to their location. The choice is US (continental) or Hawaii. The default is US. Select the coverage area (the system may reboot), exit the diagnostic mode, and restart the vehicle.
If a customer relocates a vehicle from the US mainland to Hawaii, or from Hawaii to the US mainland, you need to change the coverage area to display the correct maps.
NOTE: This function operates only when the vehicle is physically located in the coverage area you select.
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 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 Detail screen. There are always at least 24 active GPS satellites in orbit. Because satellites fail, and have to be removed from service, spares are always parked in orbit, ready to be activated. This is why the PRN (satellite ID number) can be greater than 24.
NOTE: 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.
- The Number of Satellites box shows the number of acquired satellites (maximum of 12). It should contain three or more icons. If not, go to GPS icon is white or not shown troubleshooting GPS Icon Is White or Not Shown.
- The Current Position shows latitude, longitude, and elevation (in feet). If there are less than four satellites, the elevation can be grossly inaccurate.
- The Date/Time field shows the current date, and also a time that includes daylight saving and other offsets entered by the customer in Setup screen 2 Adjust Time Zone/Clock.
NOTE: Pressing the map/guide button displays the satellite number on each circle.
GPS Detail
By pressing and holding the MENU button for 2 seconds, a GPS Detail screen appears. This screen displays real time incoming satellite positional data when the vehicle is outside in the open. The information shown on this screen is for factory use.
NOTE: The data shown is an example only.
- The box TS/AS and H Dop/V Dop is for factory use.
- The Speed and Direction information is updated in real time when driving.
- 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 four 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.
- 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 table of values defines the terms at the top of the columns in the GPS Detail screen.
Yaw Rate
This diagnostic checks the yaw rate sensor in the audio-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.
- 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 audio-navigation unit Audio-Navigation Unit Removal/Installation.
- 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 audio-navigation unit Audio-Navigation Unit Removal/Installation.
Example: Vehicle stopped
Example: Vehicle turning
- 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 ADJUSTED.
- For detailed analysis of the yaw rate select tuning.
