Touch Panel Switch does not Function: Procedure

CHECK DISPLAY (FOREIGN MATTER)
1. Check if there is any foreign matter caught between the display and exterior frame of the display.
  OK
  
  No foreign matter is caught between the display and exterior frame of the display.
  
  HINT:
  
  If there is foreign matter between the display and exterior frame of the display, the touch panel will remain pressed, preventing touch switch operation.
NG → REMOVE FOREIGN MATTER

OK: Go to next step
CHECK TOUCH PANEL
1. Check for foreign matter on the display.
  OK
  
  The display is clean.
NG → CLEAN DISPLAY AND RECHECK TOUCH PANEL

OK: Go to next step
CHECK TOUCH SWITCH (OPERATION CHECK)

Fig 1: Screen Display - Touch Switch Check
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Enter the "Touch Switch Check" screen. Refer to Check Touch Switch in Operation Check. Refer to OPERATION CHECK .
2. Touch the display in the area where the switch malfunction occurs.
  OK
  
  A "+" mark appears at the touched position.
NG → See step 4

OK → See step 5
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to REMOVAL