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 the line is found 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 of the infrared sensors. |