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.
Symptom | Suspected Area | See page |
---|---|---|
Pressing engine switch does not turn on system | Proceed to "Navigation Receiver Assembly Power Source Circuit" | |
Navigation receiver assembly | ||
Black screen (No image appears on navigation/audio screen) | Proceed to "Black Screen" | |
Navigation receiver assembly | ||
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" | |
Proceed to "Illumination Circuit" | ||
Navigation receiver assembly | ||
Power does not turn off (Screen remains on) | Proceed to "Navigation Receiver Assembly Power Source Circuit" | |
Navigation receiver assembly | ||
Screen is distorted | Proceed to "Navigation Receiver Assembly Power Source Circuit" | |
Navigation receiver assembly | ||
Screen flicker or color distortion | Proceed to "Screen Flicker or Color Distortion" | |
Proceed to "Navigation Receiver Assembly Power Source Circuit" | ||
Navigation receiver assembly | ||
Navigation function switches can be operated while vehicle being driven | Proceed to "Parking Brake Switch Circuit" | |
Navigation receiver assembly |
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" | |
Proceed to "Illumination Circuit" | ||
Navigation receiver assembly | ||
Panel switches do not function | Proceed to "Panel Switches do not Function" | |
Proceed to "Navigation Receiver Assembly Power Source Circuit" | ||
Navigation receiver assembly | ||
Touch panel switch does not function | Proceed to "Touch Panel Switch does not Function" | |
Proceed to "Navigation Receiver Assembly Power Source Circuit" | ||
Navigation receiver assembly | ||
The handwriting input screen is not displayed or potential matches for the character currently being entered and potential matches for the next character are not displayed. | Navigation receiver assembly | |
Navigation function switches can be operated while vehicle is driving | Proceed to "Parking Brake Switch Circuit" | |
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
System cannot be operated by steering pad switch | Proceed to "Panel Switches do not Function" | |
Proceed to "Steering Pad Switch Circuit" | ||
Navigation receiver assembly | ||
Illumination for steering pad switch does not come on with tail switch on | Proceed to "Illumination Circuit" | |
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
GPS mark is not displayed | Proceed to "GPS Mark is not Displayed" | |
Navigation antenna assembly | ||
Navigation receiver assembly | ||
Date and time on navigation screen is different from actual date and time | Proceed to "GPS Mark is not Displayed" | |
Navigation antenna assembly | ||
Navigation receiver assembly | ||
Vehicle position mark deviates from correct position and does not return to correct position | Proceed to "GPS Mark is not Displayed" | |
Navigation antenna assembly | ||
Navigation receiver assembly | ||
Cursor or map rotates when vehicle is stopped | Proceed to "Cursor or Map Rotates when Vehicle Stopped" | |
Navigation receiver assembly | ||
Vehicle position mark moves in the opposite direction to the vehicle | Proceed to "Cursor or Map Rotates when Vehicle Stopped" | |
Proceed to "Reverse Signal Circuit" | ||
Navigation receiver assembly | ||
Vehicle position mark deviates from and returns to correct position repeatedly even though GPS mark is displayed | Proceed to "GPS Mark is not Displayed" | |
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 | ||
Navigation receiver assembly | ||
Vehicle position mark moves slow or fast | Proceed to "GPS Mark is not Displayed" | |
Navigation antenna assembly | ||
Navigation receiver assembly | ||
Voice guidance does not function | Proceed to "Voice Guidance does not Function" | |
Proceed to "Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier" | ||
Proceed to "Navigation Voice Circuit" | ||
Proceed to "Speaker Circuit" | ||
Navigation receiver assembly | ||
Map display is incomplete | Navigation receiver assembly | |
Route cannot be calculated | Proceed to "Route cannot be Calculated" | |
Navigation receiver assembly | ||
Navigation system cannot record memory point registration or each item setting | Navigation receiver assembly | |
A message indicating to wait for a while because of low temperature is displayed | Start the engine and increase cabin temperature (Near navigation receiver assembly) | - |
Navigation receiver assembly | ||
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 | - |
Navigation receiver assembly | ||
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) | - |
Navigation receiver assembly | ||
Customizable parameters cannot be changed (customizable parameters can be changed by using the GTS) | Navigation receiver assembly | |
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 | |
Reverse signal does not change in vehicle signal check mode | Proceed to "Reverse Signal Circuit" | |
Navigation receiver assembly | ||
Parking brake switch signal does not change in vehicle signal check mode | Proceed to "Parking Brake Switch Circuit" | |
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
No sound can be heard from speakers | Proceed to "No Sound can be Heard from Speakers" | |
Proceed to "Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier" | ||
Proceed to "Speaker circuit" | ||
Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier" | ||
Proceed to "Stereo Component Amplifier Power Source Circuit" | ||
Stereo component amplifier assembly | ||
Navigation receiver assembly | ||
Abnormal noise occurs | Proceed to "Noise Occurs" | |
Stereo component amplifier assembly | ||
Navigation receiver assembly | ||
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)" | ||
Proceed to "Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier" | ||
Proceed to "Speaker circuit" | ||
Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier" | ||
Stereo component amplifier assembly | ||
Navigation receiver assembly | ||
ASL does not function | Check that the ASL function is on. | - |
Proceed to "Vehicle Speed Signal Circuit between Navigation Receiver Assembly and Combination Meter" | ||
Proceed to "Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter" | ||
Stereo component amplifier assembly | ||
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
Radio broadcast cannot be received or poor reception | Proceed to "Radio Broadcast cannot be Received or Poor Reception" | |
Radio broadcast can be received but radio station cannot be displayed (Some radio stations do not provide their name information) | Navigation receiver assembly | |
Radio broadcast can be displayed but radio broadcast cannot be heard from speakers | Check the volume settings | - |
Navigation receiver assembly | ||
Radio broadcast can be received but station list cannot be displayed | Wait for 120 seconds in radio mode, and select the "Refresh" switch on the station list screen | - |
Navigation receiver assembly | ||
Radio broadcast can be received but station list cannot be displayed | Select the "Refresh" switch on the station list screen | - |
Wait for 10 minutes with the engine switch on (ACC), and select the "Refresh" switch on the station list screen again | - | |
Navigation receiver assembly | ||
After the voice recognition function or hands-free function is turned off, the cache radio does not operate | Check that the cache radio setting is on | - |
Navigation receiver assembly | ||
When the cache radio is playing, sound is interrupted, sound cannot be heard or sound quality is poor | Check if similar symptoms occur when receiving conventional FM/AM radio broadcasts | - |
Check if similar symptoms occur when receiving other broadcasts | - | |
Move the vehicle to a place where the reception sensitivity is good and check again | - | |
Navigation receiver assembly | ||
When the cache radio is playing, sound can be heard, but no information is displayed (some radio stations do not provide their name information) | Check if similar symptoms occur when receiving other broadcasts | - |
Move the vehicle to a place where the reception sensitivity is good and check again | - | |
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
Disc cannot be played or player does not function with disc | Proceed to "Disc Player Outline" in System Description and check if the disc is compatible with the disc player | |
Proceed to "Check Optical Disc Error History" in Operation Check | ||
Navigation receiver assembly | ||
Disc cannot be inserted/played or disc is ejected right after insertion | Proceed to "Check Optical Disc Error History" in Operation Check | |
Proceed to "Disc cannot be Inserted or is Ejected Right After Insertion" | ||
Disc cannot be ejected | Proceed to "Check Optical Disc Error History" in Operation Check | |
Proceed to "Disc cannot be Ejected" | ||
Disc sound skips | Proceed to "Check Optical Disc Error History" in Operation Check | |
Proceed to "CD/DVD Sound Skips" | ||
While vehicle is stopped, DVD cannot be viewed even when parking brake is set (parking brake switch is on) | Proceed to "Parking Brake Switch Circuit" | |
Navigation receiver assembly | ||
Screen color is poor only when watching a DVD | Change the color settings on the screen adjustment screen | - |
Navigation receiver assembly | ||
Sound quality is bad only when disc is played (volume is too low) | Proceed to "Check Optical Disc Error History" in Operation Check | |
Proceed to "Sound Quality is Bad Only when Disc is Played (Volume is Too Low)" |
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" | |
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
"AUX/VTR" is not displayed on system check mode screen | Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter" | |
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
"Bluetooth" is inoperative. | Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly" | |
Navigation receiver assembly | ||
Cellular phone registration failure. | Proceed to "Cellular Phone Registration Failure, Phonebook Transfer Failure" | |
Navigation receiver assembly | ||
Cellular phone cannot make outgoing/incoming calls or call in a certain place. | Proceed to "Cellular Phone cannot Make Outgoing/Incoming Calls" | |
Navigation receiver assembly | ||
Message that prompts to check the cellular phone is displayed. | Proceed to "Cellular Phone cannot Make Outgoing/Incoming Calls" | |
Navigation receiver assembly | ||
Phonebook data cannot be transferred manually or automatically. | Check the automatic download contract 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" | ||
Navigation receiver assembly | ||
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 | |
Proceed to "The Other Caller's Voice cannot be Heard, is too Quiet, or Distorted" | ||
Navigation receiver assembly | ||
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 | |
Proceed to "The Other Caller cannot Hear Your Voice, or Your Voice is too Quiet or Distorted" | ||
Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly" | ||
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
Portable player cannot be registered | Proceed to "Portable Player cannot be Registered" | |
Navigation receiver assembly | ||
Portable player cannot be connected manually/automatically | Proceed to "Portable Player cannot be Registered" | |
Proceed to "Portable Player cannot be Connected Manually/Automatically" | ||
Navigation receiver assembly | ||
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" | |
Proceed to "Portable Player cannot be Connected Manually/Automatically" | ||
Navigation receiver assembly | ||
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" | |
Navigation receiver assembly | ||
Portable player does not play even after "Bluetooth" audio mode is selected | Proceed to "Does not Play even after Bluetooth Audio Mode is Selected" | |
Navigation receiver assembly | ||
Portable player does not play | Proceed to "Does not Play even after Bluetooth Audio Mode is Selected" | |
Navigation receiver assembly | ||
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" | |
Navigation receiver assembly | ||
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" | |
Navigation receiver assembly | ||
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" | |
Navigation receiver assembly | ||
"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" | |
Navigation receiver assembly | ||
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" | |
Navigation receiver assembly | ||
Noise occurs or sound skips when portable player plays | Proceed to "Noise Occurs or Sound Skips when Portable Player Plays" | |
Navigation receiver assembly | ||
Registered device cannot be deleted | Proceed to "Registered Device cannot be Deleted" | |
Navigation receiver assembly |
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 Assembly and Stereo Jack Adapter" | |
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
USB device or "iPod" is not recognized | Proceed to "USB Audio System Recognition/Play Error" | |
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
Track information such as track, artist and album names are not displayed | Proceed to "USB Audio System Recognition/Play Error" | |
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
USB device or "iPod" is recognized but cannot play, or can play but not in a sorted order | Proceed to "USB Audio System Recognition/Play Error" | |
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
Album cover art cannot be displayed | Check that Display Cover Art on the "iPod" Settings screen is set to on | - |
Check if similar symptoms occur with another vehicle | - | |
If an indication to update the Gracenote database appears on the album cover art screen and update data has been downloaded to the Navigation receiver assembly, update the Gracenote database to the latest version. | - | |
Navigation receiver assembly | ||
User set album cover art cannot be displayed | Check that a JPEG file is used for the album cover art registered to the music data in the USB device or "iPod" - Navigation receiver assembly | - |
Navigation receiver assembly | ||
"iPod" battery cannot be charged | Proceed to "USB Audio System Recognition/Play Error" | |
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
Screen is distorted or not displayed only when using the video function of an "iPod" | Check if "iPod" is set to output images | - |
Proceed to "USB Audio System Outline" in System Description and check if the "iPod" is compatible with the navigation receiver assembly | ||
Check if the appropriate image signal setting (NTSC/ PAL) is selected | - | |
Check if video sound input is set to "A/V" | - | |
Connect using a known good cable and check if the image is output | - | |
Proceed to "Display Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter" | ||
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
Screen cannot be changed to UIC setting screen | Navigation receiver assembly | |
Thumbnails for opening image setting or screen off image setting do not update when USB device is connected | Check that the USB device was not disconnected while transferring an image | - |
Check that the screen was not changed to another function menu while transferring an image | - | |
Proceed to "USB Audio System Recognition/ Play Error" | ||
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
Transfer button cannot be pressed | Check that a USB device is connected | - |
Check that the USB device is not in use (USB audio system is playing etc.) | - | |
Proceed to "USB Audio System Recognition/ Play Error" | ||
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
Image data in USB device cannot be displayed | Check that the designated folder name is used | - |
Check that the file extension of the data is JPG or JPEG | - | |
Check that the file name is 32 characters or less and available language is used | - | |
Check that the image data size is 10 MB or less | - | |
Check that the file system of the USB device is FAT16 or FAT32 | - | |
Proceed to "USB Audio System Recognition/ Play Error" | ||
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
Set opening image or screen off image is not displayed | Check if it is the first start-up after disconnecting and reconnecting the +B terminal | - |
Set the opening image or screen off image again | - | |
Navigation receiver assembly | ||
Stored image cannot be deleted | Navigation receiver assembly | |
Message indicating that USB device cannot be accessed is displayed | Check that the USB device has not been disconnected while the navigation system is recognizing it | - |
Proceed to "USB Audio System Recognition/ Play Error" | ||
No. 1 stereo jack adapter assembly | ||
Navigation receiver assembly | ||
Thumbnail images for opening image or screen off image are not displayed on setting screen | Check if it is the first start-up after disconnecting and reconnecting the +B terminal | - |
Set the opening image or screen off image again | - | |
Navigation receiver assembly | ||
Image cannot be set for opening image or screen off image on setting screen | Set the opening image or screen off image again | - |
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
"Fuel Consumption" icon is dimmed | Check if other icons or items displayed on screen have any problems | - |
Navigation receiver assembly | ||
Graph is not displayed on "Trip Information" screen | Recheck with the engine running | - |
Navigation receiver assembly | ||
Cruise range is not displayed on "Trip Information" screen | Turn engine switch on (IG) and recheck | - |
Navigation receiver assembly | ||
Graph is not updated on "Past record" screen even though "Clear" is selected | Turn engine switch on (IG) and recheck | - |
Navigation receiver assembly | ||
Graph is not displayed on "Past record" screen | Turn engine switch on (IG) and recheck | - |
Navigation receiver assembly |