Touch Panel Switch does not Function: Procedure

CHECK MULTI-DISPLAY
1. Check if there is any foreign matter caught between the display and exterior frame of the multi-display.
  OK
  
  No foreign matter is caught between the display and exterior frame of the multi-display.
  
  HINT:
  
  If there is foreign matter between the display and exterior frame of the multi-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 RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to REMOVAL