Acura 3.5 RL Manual page 1329

Unit Check
Touch the item you want to check and the check starts.
Display
This diagnostic performs additional checks on the com-
munication bus between the control unit and the dis-
play. In addition, the internal electronics and touch
screen functionality are confirmed.
• When the connection is NG, first check for loose ter-
minals 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.
• If the touch sensor is NG, then check for zeros in the
"X", or "Y" values below.
• The version represents the software version in the
display.
• The "1" following the X, indicate the 20 working ver-
tical infrared beams/receptors (from left to right).
The "Is" following the Y, indicate the 9 working hori-
zontal beams (from top to bottom). If any one of the
"1s" is a zero, this indicates that these is a problem
with one of the beams or receptors. Check all around
the inside rim of the navigation screen for dirt or any-
thing 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 the Monitor Check menu choice.
NOTE: When selecting this diagnostic from "Unit
Check," quickly remove your fingers from the touch-
screen to avoid a false detection of the infrared sen-
sors.