NAVIGATION SYSTEM (for Navigation Receiver Type) PROBLEM SYMPTOMS TABLE

Tech Tips


  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Display Function
Symptom Suspected Area See page
Pressing power switch does not turn on system. Proceed to "Navigation Receiver Assembly Power Source Circuit"

Click here

Navigation ECU sub-assembly

Click here

Black screen (No image appears on navigation/audio screen.) Proceed to "Black Screen"

Click here

Proceed to "Check Software Error History" in Operation Check

Click here

Hard disk drive

Click here

Navigation ECU sub-assembly

Click here

Display does not dim (does not change to night screen) with tail switch on. Proceed to "Display does not Dim when Light Control Switch is Turned ON"

Click here

Proceed to "Illumination Circuit"

Click here

Navigation ECU sub-assembly

Click here

Power does not turn off. (Screen remains on.) Proceed to "Navigation Receiver Assembly Power Source Circuit"

Click here

Navigation ECU sub-assembly

Click here

Display panel does not open, tilt, or tilts improperly. Proceed to "Display Panel does not Open, Tilt or Tilts Improperly"

Click here

Proceed to "Navigation Receiver Assembly Power Source Circuit"

Click here

Navigation ECU sub-assembly

Click here

Screen is distorted. Proceed to "Navigation Receiver Assembly Power Source Circuit"

Click here

Navigation ECU sub-assembly

Click here

Screen flicker or color distortion. Proceed to "Screen Flicker or Color Distortion"

Click here

Proceed to "Navigation Receiver Assembly Power Source Circuit"

Click here

Navigation ECU sub-assembly

Click here

Panel Switch and Touch Switch Function
Symptom Suspected Area See page
Illumination for panel switches does not come on with tail switch on. Proceed to "Illumination for Panel Switch does not Come on with Tail Switch ON"

Click here

Proceed to "Illumination Circuit"

Click here

Navigation ECU sub-assembly

Click here

Panel switches do not function. Proceed to "Panel Switches do not Function"

Click here

Proceed to "Navigation Receiver Assembly Power Source Circuit"

Click here

Navigation ECU sub-assembly

Click here

Touch panel switch does not function. Proceed to "Touch Panel Switch does not Function"

Click here

Proceed to "Navigation Receiver Assembly Power Source Circuit"

Click here

Navigation ECU sub-assembly

Click here

Navigation function switches can be operated while vehicle is driving. Proceed to "Parking Brake Switch Circuit"

Click here

Navigation ECU sub-assembly

Click here

Steering Pad Switch Function
Symptom Suspected Area See page
System cannot be operated by steering pad switch. Proceed to "Panel Switches do not Function"

Click here

Proceed to "Steering Pad Switch Circuit"

Click here

Navigation ECU sub-assembly

Click here

Illumination for steering pad switch does not come on with tail switch on. Proceed to "Illumination Circuit"

Click here

Navigation ECU sub-assembly

Click here

Navigation Function
Symptom Suspected Area See page
GPS mark is not displayed. Proceed to "GPS Mark is not Displayed"

Click here

Navigation antenna assembly

Click here

Navigation ECU sub-assembly

Click here

Date and time on navigation screen is different from actual date and time. Proceed to "GPS Mark is not Displayed"

Click here

Navigation antenna assembly

Click here

Navigation ECU sub-assembly

Click here

Vehicle position mark deviates from correct position and does not return to correct position. Proceed to "GPS Mark is not Displayed"

Click here

Navigation antenna assembly

Click here

Navigation ECU sub-assembly

Click here

Cursor or map rotates when vehicle is stopped. Proceed to "Cursor or Map Rotates when Vehicle Stopped"

Click here

Navigation ECU sub-assembly

Click here

Vehicle position mark moves in the opposite direction to the vehicle. Proceed to "Cursor or Map Rotates when Vehicle Stopped"

Click here

Proceed to "Reverse Signal Circuit"

Click here

Navigation ECU sub-assembly

Click here

Vehicle position mark deviates from and returns to correct position repeatedly even though GPS mark is displayed. Proceed to "GPS Mark is not Displayed"

Click here

Drive the vehicle for sensor learning. (At a place where GPS signals can be received, drive the vehicle clockwise and counterclockwise in at least a 200 meter square 2 times or more.) -
Navigation antenna assembly

Click here

Navigation ECU sub-assembly

Click here

Vehicle position mark moves slow or fast. Proceed to "GPS Mark is not Displayed"

Click here

Navigation antenna assembly

Click here

Navigation ECU sub-assembly

Click here

Voice guidance does not function. Proceed to "Voice Guidance does not Function"

Click here

Proceed to "Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"

Click here

Proceed to "Speaker Circuit"

Click here

Proceed to "Navigation Voice Circuit"

Click here

Stereo component amplifier assembly

Click here

Navigation ECU sub-assembly

Click here

Map display is incomplete. Hard disk drive

Click here

Navigation ECU sub-assembly

Click here

Route cannot be calculated. Proceed to "Route cannot be Calculated"

Click here

Navigation ECU sub-assembly

Click here

Navigation ECU cannot record memory point registration or each item setting. Hard disk drive

Click here

Navigation ECU sub-assembly

Click here

A message indicating to wait for a while because of low temperature is displayed. Start the engine and increase cabin temperature near navigation ECU sub-assembly. -
Hard disk drive

Click here

Navigation ECU sub-assembly

Click here

A message is displayed because map data cannot be read, and current position screen is not displayed. If message appears only when driving on rough roads, check if message disappears when vehicle is stopped. -
Hard disk drive

Click here

Navigation ECU sub-assembly

Click here

Map screen turns white or blue. (GPS receiving status is displayed normally, and switches and own vehicle position mark are also displayed normally.) Change map scale to smallest (a scale that shows a large area). -
Hard disk drive

Click here

Navigation ECU sub-assembly

Click here

Customizable parameters cannot be changed. (Customizable parameters can be changed by using the GTS.) Navigation ECU sub-assembly

Click here

The password set using the memory point export/import function has been forgotten. Proceed to "Clear Backup Password of Export/Import Memory Point Function" in Operation Check

Click here

Reverse signal does not change in vehicle signal check mode. Proceed to "Reverse Signal Circuit"

Click here

Navigation ECU sub-assembly

Click here

Parking brake switch signal does not change in vehicle signal check mode. Proceed to "Parking Brake Switch Circuit"

Click here

Navigation ECU sub-assembly

Click here

General Audio Function
Symptom Suspected Area See page
No sound can be heard from speakers. Proceed to "No Sound can be Heard from Speakers"

Click here

Proceed to "Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"

Click here

Proceed to "Speaker Circuit"

Click here

Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"

Click here

Stereo component amplifier assembly

Click here

Navigation ECU sub-assembly

Click here

Abnormal noise occurs. Proceed to "Noise Occurs"

Click here

Stereo component amplifier assembly

Click here

Navigation ECU sub-assembly

Click here

Sound quality is bad in all modes. (Volume is too low.) Check that the ASL function is off. -
Proceed to "Poor Sound Quality in All Modes (Low Volume)"

Click here

Proceed to "Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"

Click here

Proceed to "Speaker Circuit"

Click here

Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"

Click here

Stereo component amplifier assembly

Click here

Navigation ECU sub-assembly

Click here

ASL does not function. Check that the ASL function is on. -
Proceed to "Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter"

Click here

Stereo component amplifier assembly

Click here

Navigation ECU sub-assembly

Click here

FM or AM Radio Function
Symptom Suspected Area See page
Radio broadcast cannot be received or poor reception. Proceed to "Radio Broadcast cannot be Received or Poor Reception"

Click here

Radio broadcast can be received but radio station cannot be displayed. (Some radio stations do not provide their name information.) Navigation ECU sub-assembly

Click here

DAB (Digital Audio Broadcast) Function (w/ DAB Function)
Symptom Suspected Area See page
DAB-DAB Link, DAB-FM Link or Time-Shift cannot be used. Check if each function is set to on -
Navigation ECU sub-assembly

Click here

CD or DVD Player Function
Symptom Suspected Area See page
Disc cannot be inserted/played or disc is ejected right after insertion. Proceed to "Check Optical Disc Error History" in Operation Check

Click here

Proceed to "Disc cannot be Inserted or is Ejected Right After Insertion"

Click here

Disc cannot be ejected. Proceed to "Check Optical Disc Error History" in Operation Check

Click here

Proceed to "Disc cannot be Ejected"

Click here

Disc sound skips. Proceed to "Check Optical Disc Error History" in Operation Check

Click here

Proceed to "CD/DVD Sound Skips"

Click here

While vehicle is stopped, DVD cannot be viewed even when parking brake is set. (Parking brake switch is on.)*1 Proceed to "Parking Brake Switch Circuit"

Click here

Navigation ECU sub-assembly

Click here

Screen color is poor only when watching DVD.*1 Change the color settings on the screen adjustment screen. -
Navigation ECU sub-assembly

Click here

Sound quality is bad only when disc is played. (Volume is too low.) Proceed to "Check Optical Disc Error History" in Operation Check

Click here

Proceed to "Sound Quality is Bad Only when Disc is played (Volume is Too Low)"

Click here


AUX Function
Symptom Suspected Area See page
External device sound cannot be heard or sound quality is bad. (Stereo jack is used.) Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter"

Click here

No. 1 stereo jack adapter assembly

Click here

Navigation ECU sub-assembly

Click here

"AUX" is not displayed on system check mode screen. Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter"

Click here

No. 1 stereo jack adapter assembly

Click here

Navigation ECU sub-assembly

Click here

Voice Recognition Function
Symptom Suspected Area See page
Voice menu screen is not displayed. (Voice recognition function does not turn on.) Check if the voice recognition prompts function is "On". -
Proceed to "Panel Switches do not Function"

Click here

Proceed to "Steering Pad Switch Circuit"

Click here

Navigation ECU sub-assembly

Click here

When voice recognition switch is pressed, a short beep is emitted but voice cannot be recognized properly. Proceed to "Voice is not Recognized"

Click here

Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly"

Click here

Hard disk drive

Click here

Navigation ECU sub-assembly

Click here

"Bluetooth" Hands-free Function
Symptom Suspected Area See page
Bluetooth is inoperative. Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly"

Click here

Navigation ECU sub-assembly

Click here

Cellular phone registration failure. Proceed to "Cellular Phone Registration Failure, Phonebook Transfer Failure"

Click here

Navigation ECU sub-assembly

Click here

Cellular phone cannot make outgoing/incoming calls or call in a certain place. Proceed to "Cellular Phone cannot Make Outgoing/Incoming Calls"

Click here

Navigation ECU sub-assembly

Click here

Message that prompts to check the cellular phone is displayed. Proceed to "Cellular Phone cannot Make Outgoing/Incoming Calls"

Click here

Navigation ECU sub-assembly

Click here

Phonebook data cannot be transferred manually or automatically. Check the automatically download contact setting -
When transferring phonebook data, OBEX authentication may be required. Enter "1234" into the "Bluetooth" phone. -
Proceed to "Cellular Phone Registration Failure, Phonebook Transfer Failure"

Click here

Navigation ECU sub-assembly

Click here

Volume of other caller's voice is not at an appropriate volume level, there is noise, sound quality is poor or other caller's voice cannot be heard. Proceed to "Check Hands-free Voice Quality and Volume Setting" in Operation Check

Click here

Proceed to "The Other Caller's Voice cannot be Heard, is too Quiet, or Distorted"

Click here

Navigation ECU sub-assembly

Click here

Stereo component amplifier assembly

Click here

Other caller cannot hear your voice at an appropriate volume level, there is noise or an echo, sound quality is poor or other caller cannot hear your voice. Proceed to "Check Hands-free Voice Quality and Volume Setting" in Operation Check

Click here

Proceed to "The Other Caller cannot Hear Your Voice, or Your Voice is too Quiet or Distorted"

Click here

Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly"

Click here

Navigation ECU sub-assembly

Click here

E-mail/SMS cannot be received or sent.*1 Check whether messages can be received/sent using the cellular phone. -
Check that the phone is registered as a hands-free device. -
Check the sending and receiving e-mails via the navigation system setting. -
Proceed to "Cellular Phone Registration Failure, Phonebook Transfer Failure"

Click here

Navigation ECU sub-assembly

Click here


"Bluetooth" Audio Function
Symptom Suspected Area See page
Portable player cannot be registered. Proceed to "Portable Player cannot be Registered"

Click here

Navigation ECU sub-assembly

Click here

Portable player cannot be connected manually/automatically. Proceed to "Portable Player cannot be Registered"

Click here

Proceed to "Portable Player cannot be Connected Manually/Automatically"

Click here

Navigation ECU sub-assembly

Click here

Cellular phone with portable audio function cannot be recognized as "Bluetooth" audio device even when connected using "Bluetooth". Proceed to "Portable Player cannot be Registered"

Click here

Proceed to "Portable Player cannot be Connected Manually/Automatically"

Click here

Navigation ECU sub-assembly

Click here

Sound of portable player cannot be heard from speakers, or sound is low. Proceed to "Sound of Portable Player cannot be Heard from Speakers or Sound is Low"

Click here

Navigation ECU sub-assembly

Click here

Portable player does not play even after "Bluetooth" audio mode is selected. Proceed to "Does not Play even after Bluetooth Audio Mode is Selected"

Click here

Navigation ECU sub-assembly

Click here

Portable player does not play. Proceed to "Does not Play even after Bluetooth Audio Mode is Selected"

Click here

Navigation ECU sub-assembly

Click here

Track information such as track number, track name, elapsed play time and playlist is not displayed. Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"

Click here

Navigation ECU sub-assembly

Click here

Operation switches for portable player such as play, pause, repeat, random and scan are not displayed. Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"

Click here

Navigation ECU sub-assembly

Click here

Battery condition of portable player is not displayed. Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"

Click here

Navigation ECU sub-assembly

Click here

"Bluetooth" signal condition is not displayed. Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"

Click here

Navigation ECU sub-assembly

Click here

Portable player cannot pause, select file, fast forward, fast rewind, play at random or scan. Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"

Click here

Navigation ECU sub-assembly

Click here

Noise occurs or sound skips when portable player plays. Proceed to "Noise Occurs or Sound Skips when Portable Player Plays"

Click here

Navigation ECU sub-assembly

Click here

Registered device cannot be deleted. Proceed to "Registered Device cannot be Deleted"

Click here

Navigation ECU sub-assembly

Click here

Connected Services (w/ Connected Services)
Symptom Suspected Area See page
Connection to the search engine fails. Check "Connected Services" in System Description

Click here

Contact the mobile network provider and check if the items in "Detail Setting" are set correctly. -
Check if the cellular phone is in standby mode. -
Check if the cellular phone is compatible with the connected service. -
Navigation ECU sub-assembly

Click here

POIs are not displayed on the list. (When using a USB device) Check if POIs are stored in USB device root folders. -
Check that POIs with extension .csi are stored in the USB device. -
Check that 8.3 filename is used for POIs. -
Check that the file size of POIs is not 400 kb or more. -
Check that nothing has been changed for downloaded POIs other than renaming them. -
Navigation ECU sub-assembly

Click here

POIs cannot be registered to the navigation system. Check if the maximum number of memory points has been registered. -
Check that nothing has been changed for downloaded POIs other than renaming them. -
Navigation ECU sub-assembly

Click here

USB Audio System Function
Symptom Suspected Area See page
USB audio system sound cannot be heard or sound quality is bad. (USB connector is used.) Proceed to "Data Signal Circuit between Navigation Receiver and Stereo Jack Adapter"

Click here

No. 1 stereo jack adapter assembly

Click here

Navigation ECU sub-assembly

Click here

USB device or "iPod" is not recognized. Proceed to "USB Audio System Recognition/Play Error"

Click here

No. 1 stereo jack adapter assembly

Click here

Navigation ECU sub-assembly

Click here

Track information such as track, artist and album names are not displayed. Proceed to "USB Audio System Recognition/Play Error"

Click here

No. 1 stereo jack adapter assembly

Click here

Navigation ECU sub-assembly

Click here

USB device or "iPod" is recognized but cannot play nor play in a sorted order. Proceed to "USB Audio System Recognition/Play Error"

Click here

No. 1 stereo jack adapter assembly

Click here

Navigation ECU sub-assembly

Click here

Album cover art cannot be displayed. Check that Display Cover Art on the "iPod" Settings screen is set to on. -
Check that a JPEG file is used for the cover art. -
"iPod" battery cannot be charged. Proceed to "USB Audio System Recognition/Play Error"

Click here

No. 1 stereo jack adapter assembly

Click here

Navigation ECU sub-assembly

Click here

Fuel Consumption Function
Symptom Suspected Area See page
"Fuel Consumption" icon is dimmed. Check if other icons or items displayed on screen have any problems. -
Navigation ECU sub-assembly

Click here

Graph is not displayed on "Trip Information" screen. Recheck with the hybrid system operating. -
Navigation ECU sub-assembly

Click here

Cruise range is not displayed on "Trip Information" screen. Turn power switch on (IG) and recheck. -
Navigation ECU sub-assembly

Click here

Graph is not updated on "Past record" screen even though "Clear" is selected. Turn power switch on (IG) and recheck. -
Navigation ECU sub-assembly

Click here

Graph is not displayed on "Past record" screen. Turn power switch on (IG) and recheck. -
Navigation ECU sub-assembly

Click here

TPEG Information (w/ Connected Services)
Symptom Suspected Area See page
TPEG information is not displayed on the navigation screen. Check that "Show traffic info" is set to on. -
Check whether the area is where TPEG information can be received. -
Navigation ECU sub-assembly

Click here

TPEG provider logo mark is not displayed on the information screen. Check if the DAB function for audio is being used. -
Check if the select traffic info service is set to AUTO. -
Check whether DAB could be received. -
Proceed to "Check DAB Reception" in Operation Check

Click here

Navigation ECU sub-assembly

Click here

Detoured search using TPEG information does not operate. Check that "Show traffic info" is set to on. -
Check that "Realtime traffic events" or "Predictive traffic events" are set to on. -
Navigation ECU sub-assembly

Click here