Navigation System Diagnostic Mode
NOTE: The screens detail indicated may change depending on equipment or specification.

Start-Up Procedure and Diagnostic Menu

NOTE: Check the vehicle 12 volt battery condition first.

1.
Start the engine.

2.
At any screen except the HOME screen, use the audio-navigation unit buttons:

Press and hold the EJECT button, the POWER (enu_4460341_1.0) button, and the HOME button until the Select Diagnosis Items menu screen is displayed:
Self-Diagnosis Mode (runs the automatic diagnosis of the navigation system)
Detail Information & Setting (allows you to manually diagnose the navigation system)
Displaying Select Diagnosis Items Menu Screen
System Links

1.
Select the Self-Diagnosis Mode from the Select Diagnosis Items menu. The message at the bottom of the screen flashes indicating ‘‘Diagnosis in progress...’’ and a bong sound is heard from the speakers While the diagnosis is running, do not turn the vehicle to the OFF (LOCK) mode.

2.
The diagnosis tests the following:
Most of the wires connecting the external navigation components shown in the block diagram.
The results from the various components shown in the block diagram.
The audio-navigation unit checks the microphone by listening to the bong sound produced by the audio-navigation unit from the speakers when the diagnosis is started. This requires that the audio system be operating normally.

3.
When the diagnosis finishes, the icons turn different colors based on their test status.

NOTE: By selecting the Help icon, you can see a description for each color.

Icon Colors
Description
Green
The system ran a diagnosis and the results are OK.
Red*
Errors that require replacement of hardware or harness. Examples are connection error or memory diagnosis errors. Check for hard error codes. Check for and troubleshooting all DTCs before continuing.
Yellow
Errors that do not require hardware replacement, such as leaving the vehicle in ACCESSORY mode or because of a missing accessory.
When the audio-navigation unit detects a failure, and stores DTC, the Error History icon turns yellow.
White
The diagnosis is running. The screen functions are locked out while the diagnosis runs.
Gray
The system cannot automatically check this function. You have to select the diagnosis item and manually do additional testing, like checking the audio-navigation unit buttons in the Hard Key test. When you complete the Hard Key test and return to the System Links screen, the gray icon turns green.
The Vehicle Status icon anytime shows gray.

*:
The F-CAN icon and the B-CAN icon turns red when the vehicle is in ACCESSORY mode. Check the System Links with the engine running, and if the F-CAN icon and the B-CAN icon turns green, the system is OK at this time. If they remain red, check for and troubleshoot and DTCs before continuing.

4.
Select the icon to see the details of that diagnostic function. The icon colors on the screen may not change until you exit and reenter the Self-Diagnosis mode. In some cases, you may have to restart the engine for the indication to change. After you repair the affected component or harness, repeat this diagnosis.
Factory Diagnostic Screen In Line Diag

If the vehicle left the factory in the factory diagnostic mode, you will see this screen every time you turn the vehicle to the ON mode. Sometimes this screen also appears after you replace the audio-navigation unit with a new or remanufactured unit. Normally the factory does the steps neccesary to verify proper operation and terminate the factory diagnosis. Until the proper confirmation sequence is done, the screen appears every time you turn the vehicle to the ON mode.

NOTE: The system cannot complete a full diagnosis unless vehicle is in the ON mode.

1.
Select the Start Diag icon to check the connection between the audio-navigation unit and related components. When the connection diagnosis is in progress, the icon (A) indicates Detecting... , and each icon turns white. If the connection is OK, the icon turns green. If the connection is NG, the icon turns red. Check for connection between the audio-navigation unit and related unit on the failure connection line.

NOTE: When the item is a variation equipment, the icon shows yellow, and it is not reflected in diagnosis.

2.
If the connection diagnosis is finished, press the steering commander switch buttons (the TALK button, the PICK-UP button, and the HANG-UP/BACK button) to check the HFL switch. As each button is pressed, the corresponding icon on the display should turn green.

3.
Press the TALK button, and within 6 seconds in a normal voice say ' 'testing' '. The Mic Level indicator on the screen should momentarily turn green.

4.
If all the diagnosis are OK, the icon (A) indicates OK. Select the EXIT Diag icon to exit the diagnostic mode. The In Line Diag should not appear again.
Forced Completing of In Line Diag

Follow the steps below to prevent the screen from showing up in the future:

1.
While displaying the In Line Diag screen, press and hold the EJECT button, the POWER (enu_4460341_1.0) button, and the HOME button until the Select Diagnosis Items menu screen is displayed.

2.
While displaying the Select Diagnosis Items menu screen, press and hold the HOME button until the In Line Diag setting screen is displayed.

3.
Set the Inline Diag Setting to Completion, the confirmation screen appears.

4.
When Yes is selected, the system restarts. After the restart, the In Line Diag should not appear again.
Detail Information & Setting

This section allows you to run a specific diagnosis and allows additional setting choices for some screens that are not shown when touching an icon from the System Links screen.

Select the item you want to check, and the test begins. To return to the previous screen, select the Return icon.
Monitor Check
Unit Check
Audio Check
Guideline Setup
Functional Setup
B-CAN
F-CAN
Version
Vehicle Status
GPS Information
Monitor Check

Overview of the audio-navigation unit display.

These screens allow you to troubleshoot the LCD display built into the audio-navigation unit. Select the item you want to check, and follow the diagnostic instructions.
RGB Color
Gray Tone
White Raster
Black Raster
Color Pattern
Touch Panel Check
Touch Panel Adjustment
Monitor Adjustment


RGB Color

NOTE: Displaying an anomaly in this diagnosis screen is not necessarily a failure.

This screen verifies that the display 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 color circles are missing, replace the audio-navigation display unit.

The diagnostic screen is displayed in full screen mode while pressing the HOME button.

Gray Tone

NOTE: Displaying an anomaly in this diagnosis screen is not necessarily a failure.

This screen checks problems with contrast in 16 gradations. 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.

The diagnostic screen is displayed in full screen mode while pressing the HOME button.

White Raster

NOTE: Displaying an anomaly in this diagnosis screen is not necessarily a failure.

This screen checks for pixels that may be dead (off). The entire display must be white.

The diagnostic screen is displayed in full screen mode while pressing the HOME button.

Black Raster

NOTE: Displaying an anomaly in this diagnosis screen is not necessarily a failure.

This screen checks for pixels that may be stuck on. The entire display must be black.

The diagnostic screen is displayed in full screen mode while pressing the HOME button.

Color Pattern

NOTE: Displaying an anomaly in this diagnosis screen is not necessarily a failure.

The screen 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 diagnosis.

The diagnostic screen is displayed in full screen mode while pressing the HOME button.

Touch Panel Check

This check allows you to check the sensitivity of touch panel. If the screen is operated in the state while the telop (A) is displayed, the traced locus changes to black, and the action name (Tap, Double tap, Pinch, Slide, and Flick) appears on the caption (B) for 5 seconds. The screen displays the coordinates of where the screen was touched. If the BACK button is pressed, the screen returns to the Monitor Check menu. If another location other than the location pressed responds, do the Touch Panel Adjustment.


Touch Panel Adjustment

This screen adjusts the alignment of these touch locations with the location of the buttons images on the screen.

The screen consists of the ? icons. Touch the center of the five ? icons on order 1?5. To store the settings, touch the Set.

NOTE: Touch the center of the ? icon correctly.

When selecting the Set icon, the confirmation screen appears.

When selecting the OK icon, the audio-navigation unit reflects the result of the touch panel adjustment.

Monitor Adjustment

This screen allows you to adjust the display position of touch screen. Select the item you want to adjust.
RGB: This allows you to center the display position.
NTSC: This allows you to adjust the rearview camera display position.
RGB

Touch each arrow icon to move the picture up/down or left/right. If the BACK button is pressed, the screen returns to Monitor Check menu.

Press the MENU button, then select the Set icon to store the settings. The Default icon resets the setting to factory specifications.

NTSC

Touch each arrow icon to move the picture up/down or left/right. To store the settings, select the Set icon. If the BACK button is pressed, the screen returns to Monitor Check menu.

If the Monitor Change icon is selected, the source sub menu is displayed. The Default icon resets the setting to factory specifications.
Unit Check (Quick Check)

These screens allow you to diagnose the audio-navigation unit and related units. Some of the tests and screens that are displayed under the Unit Check are same as the checks listed under the Detail Information & Setting.

To start the test, select the item you want to check.

NOTE: These items describe in indication order.
DA Unit
F-CAN
B-CAN
USB
SD
Vehicle Status
HFT/Mic
Hard Key
Error History
Rear Wide Camera
LaneWatch
HD Radio
XM
Center display
Display
A/C
GPS antenna
HD Traffic
Yaw Sensor
MirrorLink
iPhone


DA Unit

This diagnosis looks for problems in the audio-navigation unit ECU. When you start this diagnosis, the audio-navigation unit may freeze or delay up to a minute while the diagnosis runs.
D-RAM Check: Displays the result of the access to the D-RAM (OK/NG). If NG, replace the audio-navigation unit.
Model: Displays the vehicle's model name.
Serial No. : Displays the audio-navigation unit serial number. That should be the same as the serial number found on the upper side of the audio-navigation unit.
Flash: Displays the result of the access to the flash memory (OK/NG). If NG, replace the audio-navigation unit.


F-CAN

NOTE: This diagnosis must have the engine running.

This diagnosis checks whether the audio-navigation unit has received specific F-CAN data. If F-CAN shows NO ERROR, an error is not detected between the F-CAN bus and the audio-navigation unit.
If F-CAN shows RX ERROR, replace the audio-navigation unit.
If F-CAN shows TIME OUT, There is a possibility that some items are NG (red icon). When all the items from each transmitting unit is NG, check for F-CAN DTCs with the HDS. If DTCs not detected, check for continuity in the F-CAN lines between the audio-navigation unit and the transmitting unit.

NOTE: When the item is a variation equipment, the item shows NG (yellow icon), and it is not reflected in diagnosis.



B-CAN

NOTE: This diagnosis must have the engine running.

This diagnosis checks whether the audio-navigation unit has received specific B-CAN data. If B-CAN shows NO ERROR, an error is not detected between the B-CAN bus and the audio-navigation unit.
If B-CAN shows RX ERROR, replace the audio-navigation unit.
If B-CAN shows TIME OUT, There is a possibility that some items are NG (red icon). When all the items from each transmitting unit is NG, check for B-CAN DTCs with the HDS. If DTCs not detected, check for continuity in the B-CAN lines between the audio-navigation unit and the transmitting unit.

NOTE: When the item is a variation equipment, the item shows NG (yellow icon), and it is not reflected in diagnosis.

Item
Transmitting Unit
VSPNE, AT, ILLUMI, VINNO, STRG_ANG, ODO_TRIP, TRICOM1 - 4, METER_RMD, GUIDE_INFO
Gauge control module
ACINFO
Climate control unit
HLSW_ICU/ICD, MICU_ICU
MICU
IMID_AUDIOSW
Multi-information display unit



USB

This diagnosis displays the USB device status that is connected to the audio-navigation unit.

If the USB memory device is connected to the USB port, the screen displays the USB controller status, the Bus power status, and the device status.

When you connect a USB mass storage device, you can see the capacity used and the amount of free space available.



SD

This diagnosis checks the SD card module status.
Connection Status: Displays the result of the insert status about the SD card module (OK; Inserted, NG; Not Inserted).
Access Status: Displays the result of the access to the SD card module (OK/NG). If NG, replace the SD card module, and recheck.
Vehicle Status

Use this screen to confirm that the audio-navigation unit is properly receiving input signals. The displayed value changes each time according to the state of input signal.

Item
Input
Description
VSP
VSP line
1: When the vehicle speed pulse is received from the PCM
0: When the vehicle speed pulse is not received from the PCM
BACK
BACK LT line
1: When the transmission is shifted to R position/mode
0: When the transmission is shifted to any position/mode other than R position/mode
IG
B-CAN lines
1: When the vehicle is in ON mode
0: When vehicle is in ACCESSORY mode
ILL
B-CAN lines
1: When parking lights, or headlights are on
0: When parking lights, or headlights are off
ILL CANCEL
B-CAN lines
1: When the dashlights brightness control knob is more than 90 % brightness with the parking lights turned on
0: When the dashlights brightness control knob is less than 90 % brightness with the parking lights turned on
ILL STEP
B-CAN lines
With the parking lights on, use the dashlights brightness control knob to dim and brighten the gauge. The value changes from 1 (max low) to 22 (max high).
Speed
B-CAN lines
This item indicates the vehicle speed (km/h).
PARK-VIDEO
PARKING BRAKE SW line
1: When the parking brake is applied
0: When the parking brake is not applied
PARK
B-CAN lines
1: When the parking brake is applied
0: When the parking brake is not applied
Current received VIN
B-CAN lines
This item indicates the VIN that received from the PCM.
Initial registered VIN
B-CAN lines
This item indicates the initial registration VIN that is saved in the audio-navigation unit.
Last registered VIN
B-CAN lines
This item indicates the additional registration VIN when the audio-navigation unit is substituted into another vehicle, or when a PCM is substituted or replaced into this vehicle.



HFT/Mic

This diagnosis allows you to independently test the Bluetooth module and microphone. The Bluetooth module and the microphone are built into the audio panel. To properly check the microphones, make sure you are sitting in the driver's seat.

If the Bluetooth Connection Diagnosis shows NG, replace the audio-navigation unit. Press the TALK button, and in a normal voice say ''testing'' within 5 seconds. The Mic Level indicator on the screen should momentarily turn green. If there is no Mic Level movement when you speak, go to HFL does not respond troubleshooting.

If you select the Transmitter Volume Change icon, the transmitter volume can be selected from three selection (Large, Middle, Small).


Hard Key

This diagnosis checks the audio-navigation unit hard buttons, face switches (AUDIO, HOME, MENU, VOL+, VOL?, BACK), and the HFL switch.

To complete the test, press each buttons. As each function is tested, the corresponding button on the display should highlight.

Note: The DISPLAY button and the MENU button on the audio remote switch are not supported with this diagnosis.
If any button of the audio-navigation unit does not respond, replace the audio-navigation unit.
If any button of the HFL switch does not respond, do the HFL switch test.


Error History

If you select Hard Error or Soft Error, you can see the error information. Refer to How to Check for Error History to use this diagnosis.



Rear Wide Camera

This diagnosis checks the rearview camera connection.
If Connection shows NG, check for hard error codes.
If Connection shows OK, press the HOME button to display the rearview camera image. To return to the previous screen, press the HOME button again.
LaneWatch

This diagnosis checks the LaneWatch camera connection.
If Connection shows NG, check for hard error codes.
If Connection shows OK, press the HOME button to display the LaneWatch camera image. To return to the previous screen, press the HOME button again.


HD Radio

This diagnosis displays the radio tuner status.

NOTE: When the radio tuner is built in the audio-navigation unit, a diagnostic result is displayed as always OK.
Frequency can be changed by selecting each icon (A).
Source can be changed in this order: AM?FM by selecting the Band Change icon.
Electric Field Intensity displays radio reception sensitivity (dB?V).


XM

This diagnosis checks the GA-Net bus between the audio-navigation unit and the XM receiver.

If Connection shows NG, the connection may be open or short between the XM receiver and the audio-navigation unit. Check for hard error codes.



Center Display

This diagnosis checks the multi-information display unit connection.

If Connection shows NG, check the connection between the multi-information display unit and the audio-navigation unit.



Display

This diagnosis checks the display controller. In this model, OK is always indicated.



A/C

This diagnosis detects if the vehicle is in ON mode using information provided over the B-CAN bus, then it tests the climate control signal via the B-CAN bus between the audio-navigation unit and the climate control unit. Make sure the engine is running for this test.

If Connection shows NG, check for hard error codes.



GPS antenna

This diagnosis checks the GPS antenna connection.

If Antenna shows NG, the GPS antenna may be failure. Check for hard error codes.

Select Information to see the GPS satellite details (see GPS Information).



HD Traffic

This diagnosis displays the HD Traffic status.
Service Status: Displays the HD Traffic service status on (1) or off (except 1).
Frequency can be changed by selecting each icon (A).
Electric Field Intensity displays radio reception sensitivity (dB).
Receive Status: Displays the reception status of HD Traffic.
?
01h: Reception is stopped
?
02h: Seek station
?
03h: Under reception
?
Reserved: Other status


Yaw Sensor

This diagnosis checks the gyro and the acceleration sensor in the audio-navigation unit. This devices detect how the vehicle moves, and repositions the vehicle position icon on the map screen. Select the item you want to check.

Yaw Rate
Sensor: Indicates the voltage output from the gyro. It should indicate about 2.100 V?2.900 V when the vehicle is stopped.
Offset: Indicates the reference voltage or standard within the gyro. It also should indicate about 2.100 V?2.900 V when the vehicle is stopped.
?
The Offset and Sensor should both indicate about 2.100 V?2.900 V when the vehicle is stopped. If either reads below 2.100 V, or above 2.901 V, replace the audio-navigation unit.
?
The Offset and Sensor should be within ?/?0.05 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.
?
A sensor voltage higher than the offset voltage indicates that the vehicle is turning to the right.
?
A sensor voltage lower than the offset voltage indicates that the vehicle is turning to the left.
Temperature: Indicates the temperature of the gyro.
Auto Tuning: For factory use only. This setting should be ON.
Learning Level: Displays the status of the internal tuning function. At initialization, this value starts at 0 and increases to 10 as the internal correction values become more accurate.
CCW Factor, CW Factor: For factory use only.
Gyro AD: Displays the result of the AD value (OK/NG). If NG, check for hard error codes.
Gyro Zero: Displays the result of the zero point output voltage (OK/NG). If NG, check for hard error codes.
Slant angle sensor
Offset: Indicates the reference voltage or standard within the acceleration sensor. It also should indicate about 1.550 V ?2.350 V when the vehicle is stopped.
Sensor: Indicates the voltage output from the acceleration sensor. It should indicate about 1.550 V ?2.350 V when the vehicle is stopped.
?
The Offset and Sensor should both indicate about 1.550 V ?2.350 V when the vehicle is stopped. If either reads below 1.550 V, or above 2.351 V, replace the audio-navigation unit.
?
A sensor voltage higher than the offset voltage indicates that the vehicle is stopped on an upward slope.
?
A sensor voltage lower than the offset voltage indicates that the vehicle is stopped on a downward slope.
iPhone/MirrorLink

This screen shows the information about the connected smartphone.
Audio Check

These screens allow you to troubleshoot the audio function. The ANC Check is not supported in this model.

Speaker Check

NOTE: Make sure the audio system is off before this diagnosis.

This diagnosis checks the audio speakers individually. Select the UP icon or the Down icon to check speakers. A tone should sound from the speaker.

Each time you select the Up icon, the system checks the speakers in this order:
????????
Each time you select the Down icon, the system checks the speakers in this order:
????????

 
Display Message
Vehicle Test Condition
FL
You should hear a tone from the driver's door speaker.
FR
You should hear a tone from the front passenger's door speaker.
RR
You should hear a tone from the right rear door speaker.
SWF
You should hear a tone from the subwoofer.
RL
You should hear a tone from the left rear door speaker.
FL-TW
You should hear a tone from the left front tweeter.
FR-TW
You should hear a tone from the right front tweeter.
All
You should hear a tone from all speakers.
Guideline Setup

These screens adjusts the rearview camera image guide lines. Select the Rear Wide Camera icon to adjust the guide lines.

Rear Wide Camera

Select the item you want to adjust.

Select the view mode icons (Wide View, Normal View, Top Down View) you want to adjust.

NOTE: The Top Down View cannot be selected when the dynamic guideline is selected.

Press the MENU button to display the sub menu.
Default: All guidelines can be reset to the factory specification.
Save: Reflects the result of the guideline adjustment.
Guideline Setup: Adjust the guideline.
Message Setup: Adjust the caution message position.
Rudder Angle: The steering angle which adjusts the position of the chosen guideline.
Guideline Setup

Touch each arrow icon to move the guidelines up/down or left/right. The screen displays the information about the adjusted distance and its direction.

Message Setup

Touch each arrow icon to move the message (A) up/down or left/right.

Rudder Angle

Select different steering angles (90° - Lock end) from the sub menu. After selecting, do the Guideline Adjustment. The adjustment method for the guideline locations is the same as the Fixed Guideline.
Functional Setup

Select the item you want to check.
Backup Data Clear
Save User's Memory
LaneWatch
Phone Picture
Anti-Theft Skip
Other
Backup Data Clear

This screen initializes the back-up data in the audio-navigation unit.

All Clear

The all clear function deletes the data in the audio-navigation unit, and restores it to the factory defaults.

When selecting the All Clear icon, the confirmation screen appears.

When selecting the Yes icon, the second confirmation screen appears.

When selecting the Yes icon, the system restarts after performing the All Clear process. After the restart, a normal start-up process occurs.
Save User's 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 their setup settings and personal addresses. The dealer inserts a USB device into the USB port, 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 USB device, and Import moves the USB device files to the new audio-navigation unit.

This function does not start until you connect a USB device to the USB port.
1.
Select the Export icon to move the customer's data from the original audio-navigation unit to the USB device. Select the Yes icon on the Export User Data Confirmation screen. The process takes only a couple of seconds. The system stores .DAT files on the USB device.

NOTE: If the Export icon is grayed out, check the USB port.

2.
After replacing the new audio-navigation unit, allow the system to boot up. Insert the USB device into the USB port and enter the Save User's Memory in the System Diagnostic Mode.
3.
Select the Import icon to move the two files stored by the Export process from the USB device to the new audio-navigation unit. Select the Yes icon 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 USB device from the USB port.

NOTE: If the Import icon is grayed out, check if the Model and the Program Version shown on the DA Unit and Version screens are the same.
LaneWatch

This diagnosis checks the LaneWatch status.
If Connection shows NG, check for hard error codes.
Error Status: Indicates LaneWatch camera status OK or NG. If Error Status shows NG, replace the LaneWatch camera. When the LaneWatch camera is disconnected, the status shows hyphen ( - ).
If Error Status shows OK, press the HOME button to display the LaneWatch camera image. To return to the previous screen, press the HOME button again.
LaneWatch Switch: LaneWatch switch status on or off. When the LaneWatch switch is pressing, the status shows ON. When the LaneWatch switch is released, the status shows hyphen ( - ).
B-CAN: Checks whether the audio-navigation unit has received specific B-CAN data from the MICU. If B-CAN shows NG, check for B-CAN DTCs with the HDS. If DTCs are not detected, check for B-CAN lines continuity between the audio-navigation unit and the MICU.
If Connection, Error Status, LaneWatch Switch, and B-CAN shows OK, the LaneWatch camera aiming procedure is available. If the LaneWatch camera need to aiming, refer to the LaneWatch Camera Aiming. When the aiming fails, Aiming shows NG.
Phone Picture

This screen allows you to enable or disable the Show Contact Picture with On/Off.
Anti-Theft Skip

This selection can cancel the anti-theft mode temporarily (for 150 seconds).

The Anti-Theft Skip icon is grayed out when the anti-theft mode is already canceled.
Other

Select the item you want to check.
Pandora Setting
HIR Setting
Demo Mode
HD Radio Setting
Pandora Setting

This screen allows you to restrict the Pandora function to the running vehicle. Refer to the Owner's Manual for more information about the Pandora setting function.

HIR Settings

This screen allows you to restrict the internet radio function. Refer to the Owner's Manual for more information about the internet radio setting function.

Demo Mode

This screen is for factory use only, and should always be set to Off. Occasionally 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. Speed Rate changes the speed of the demo mode.

HD Radio Setting

This screen allows you to restrict the HD radio album art function to the running vehicle. Refer to the Owner's Manual for more information about the album art function.
B-CAN

Refer to the B-CAN in the Unit Check for details.
F-CAN

Refer to the F-CAN in the Unit Check for details.
Version

This screen displays the current version information about each module in the audio-navigation unit.
Vehicle Status

Refer to the Vehicle Status in the Unit Check for details.
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 while pressing the HOME button that correspond to the PRN (satellite ID number). 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 can be greater than 24.

NOTE: When you use this screen for troubleshooting, park the vehicle outside, away from buildings, tall trees, and hightension 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.
The Current Position shows latitude, longitude, and elevation (in feet). If there are less than four satellites, the elevation can be grossly inaccurate.
The Time 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.