Navi ECU This screen looks for problem with the navigation unit. When this diagnostic is initiated, there is a delay of up to a minute while it runs.

- ‘‘ROM (Application)'', and ‘‘ROM (Loader)'' are for factory use.
- 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 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. This information can also be found 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. This number is needed to obtain the security code from the Interactive Network (IN) system.
- Mem Clr is for factory use and should not be used unless instructed by the factory.
  Selecting this will erase the customer's settings, personal information, GPS orbital data, and anything else stored in memory.