Unit 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 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.
- The "1" following the X, indicate the 20 working vertical infrared beams/receptors (from left to right). The "1s" following the Y, indicate the 10 working horizontal beams (from top to bottom). If any one of the "1s" is a zero, this indicates that there is a problem with one of the beams or receptors. Check all around the inside rim of the navigation screen for dirt or anything that may be blocking a beam. If nothing is found, replace the display unit. See the display unit diagram in the "System Description" showing the infrared beam layout. Individual touch positions can be verified by running the "Touch Panel" diagnostic under Monitor Check.NOTE: When selecting this diagnostic from "Unit Check," quickly remove your fingers from the touchscreen to avoid a false detection of the infrared sensors.