Touch Panel Switch does not Function

CHECK TOUCH SWITCH (DISPLAY CHECK MODE)
1. Check the touch switch (Display Check Mode) (See DTC CHECK / CLEAR ).
NG: REPLACE MULTI-DISPLAY

OK: Go To Next Step
CHECK AVC-LAN CIRCUIT
1. Check the AVC-LAN circuit (see AVC-LAN CIRCUIT ).
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go To Next Step

CHECK TOUCH PANEL SWITCH

Result:

RESULT REFERENCE

Result	Proceed to
All switches do not operate	A
Navigation system switches do not operate	B
Air conditioning system switches do not operate	C

A: REPLACE MULTI-DISPLAY

B: REPLACE NAVIGATION ECU

C: Go To Next Step

CHECK WIRE HARNESS (GATEWAY ECU - AIR CONDITIONING AMPLIFIER ASSEMBLY)
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY