Unit Check

Unit Check

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






Display

This diagnostic performs additional checks on the communication bus between the control unit and the display. In addition, the internal electronics and touch screen functionality are confirmed.

- 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 you find the line to have 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.

NOTE: When selecting this diagnostic from "Unit Check," quickly remove your fingers from the touch screen to avoid a false detection.






Radio

If the NG is indicated, check for loose audio unit connector.

NOTE: If the XM link was displayed red, but the radio link was displayed green in the navigation system link, refer to the audio system error codes list.






Navi ECU

This screen looks for problems the navigation unit. When you initiate this diagnostic, the navigation unit may 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 will reboot.

- If "V-RAM" or "D-RAM" is NG, then 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 GPS antenna. If this diagnostic reads OK, then replace the 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 also find this information in Setup Screen 4 by selecting system Information.
- "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 Clear" is for factory use and should not be used unless instructed by the factory.
Selecting this will erase 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 card slot, and the screen should say, "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 the card, then the screen displays the Manufacturer, and Product Name as shown in the following screen.






Hard Key

This diagnostic tests the joystick, and the buttons that surround it. For this model, the joystick 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 joystick to each indicated position. As you test each function, the corresponding button on the display should highlight. To exit, push in and hold the selector knob.