NAVIGATION SYSTEM > PROBLEM SYMPTOMS TABLE

for Preparation Click here

Before performing verification listed in the table below, check the fuse and relay.
Before performing verification listed in the table below, check the DTCs.
Methods used to verify the cause of the problem are listed in order of probability in the suspected area column.

Display function
Symptom	Suspected area	See page
Black screen (No image appears on navigation/audio screen).	1. "Black Screen (No Image Appears on Navigation and Audio Screen)"	Click here
	2. Dimmer signal circuit	Click here
	3. Multi-display power source circuit	Click here
	4. AVC-LAN circuit	Click here
	5. Replace multi-display	Click here
Illumination for panel switch does not come on with TAIL switch on.	1. "Illumination for Panel Switch does not Come on with Tail Switch ON"	Click here
	2. Illumination circuit	Click here
	3. Replace multi-display	Click here
Display does not dim (Night Screen) with TAIL switch on.	1. "Display does not DIM (Night Screen) with Tail Switch ON"	Click here
	2. Dimmer signal circuit	Click here
	3. Replace multi-display	Click here
Power does not turn off (The screen remains on).	1. Multi-display power source circuit	Click here
Power does not turn off (The screen remains on).	2. Replace multi-display	Click here
Panel switches do not function.	1. "Panel Switches do not Function"	Click here
	2. Steering pad switch circuit (audio function)	Click here
	3. Steering pad switch circuit (navigation function)	Click here
	4. Multi-display power source circuit	Click here
	5. Replace multi-display	Click here
Touch panel switch does not function.	1. "Touch Panel Switch does not Function"	Click here
	2. Steering pad switch circuit (audio function)	Click here
	3. Steering pad switch circuit (navigation function)	Click here
	4. Multi-display power source circuit	Click here
	5. Replace multi-display	Click here
Navigation screen is not displayed.	1. Display signal circuit between navigation ECU and television camera ECU	Click here
	2. Display signal circuit between television camera ECU and multi-display	Click here
	3. Replace multi-display	Click here
Screen flicker or color distortion.	1. "Screen Flicker or Color Distortion"	Click here
	2. Display signal circuit between navigation ECU and television camera ECU	Click here
	3. Display signal circuit between television camera ECU and multi-display	Click here
	4. Replace navigation ECU	Click here
	5. Replace multi-display	Click here
Navigation function switches can be operated while vehicle is running.	1. Vehicle speed signal circuit between multi-display and combination meter	Click here

Navigation function
Symptom	Suspected area	See page
Map disc cannot be inserted.	1. "Map Disc cannot be Inserted"	Click here
	2. Navigation ECU power source circuit	Click here
	3. Replace navigation ECU	Click here
Map disc cannot be ejected.	1. Navigation ECU power source circuit	Click here
Map disc cannot be ejected.	2. Replace navigation ECU	Click here
Vehicle position mark deviates greatly.	1. "Vehicle Position Mark Deviates Greatly"	Click here
	2. Replace GPS antenna	Click here
	3. Replace navigation ECU	Click here
Vehicle position mark is not updated.	1. "Vehicle Position Mark is not Updated"	Click here
	2. Replace map disc	-
	3. Replace navigation ECU	Click here
Current position display does not appear.	1. "Current Position Display does not Appear"	Click here
	2. Replace GPS antenna	Click here
	3. Replace navigation ECU	Click here
GPS mark is not displayed.	1. "GPS Mark is not Displayed"	Click here
	2. Replace GPS antenna	Click here
	3. Replace navigation ECU	Click here
Voice guidance does not function.	1. "Voice Guidance does not Function"	Click here
	2. Mute signal circuit between stereo component amplifier and navigation ECU	Click here
	3. Navigation voice speaker circuit	Click here
	4. Replace map disc	-
	5. Replace navigation ECU	Click here
Map display incomplete.	1. "MAP Display Incomplete"	Click here
	2. Replace map disc	-
	3. Replace navigation ECU	Click here
Route cannot be calculated.	1. "Route cannot be Calculated"	Click here
	2. Replace map disc	-
	3. Replace navigation ECU	Click here
Voice recognition difficulty.	1. "Voice Recognition Difficulty"	Click here
Voice recognition difficulty.	2. Replace navigation ECU	Click here
Voice is not recognized.	1. "Voice is not Recognized"	Click here
	2. Microphone circuit between overhead J/B and multi-display	Click here
	3. Microphone circuit between multi-display and navigation ECU	Click here
	4. Steering pad switch circuit	Click here
	5. Replace microphone	Click here
	6. Replace overhead J/B	Click here
	7. Replace navigation ECU	Click here
	8. Replace multi-display	Click here
	9. Replace radio receiver	Click here
RDS-TMC does not function.	1. "RDS-TMC does not Function"	Click here
	2. RDS-TMC signal circuit between radio receiver and navigation ECU	Click here
	3. Replace navigation ECU	Click here

Steering pad switch function
Symptom	Suspected area	See page
Voice navigation cannot be operated with steering pad switch.	1. Steering pad switch circuit	Click here
	2. Replace radio receiver	Click here
	3. Replace navigation ECU	Click here

Bluetooth function
Symptom	Suspected area	See page
Cellular phone registration failure, phone directory transfer failure.	1. "Cellular Phone Registration Failure, Phone Directory Transfer Failure"	Click here
Cellular phone cannot send/receive.	1. "Cellular Phone cannot Send/Receive"	Click here
	2. Cellular phone voice circuit between multi-display and navigation ECU	Click here
	3. Replace multi-display	Click here
	4. Replace navigation ECU	Click here
Cannot call in a certain place.	1. "Cannot call in a Certain Place"	Click here
The other caller's voice cannot be heard, is too quiet, or distorted.	1. "The Other Caller's Voice cannot be Heard, is too Quiet, or Distorted"	Click here
	2. Replace navigation ECU	Click here
	3. Replace multi-display	Click here
The other caller cannot hear your voice, or your voice is too quiet or distorted.	1. "The Other Caller cannot Hear Your Voice, or Your Voice is too Quiet or Distorted"	Click here