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 |
---|---|---|
Black screen (no image appears on the navigation/audio screen) | Proceed to "Black Screen" | |
Proceed to "Check Software Error History" in Operation Check | ||
Navigation receiver assembly | ||
Display does not dim when the tail switch is turned 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" | |
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" | |
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 | ||
Navigation function switches can be operated while vehicle being driven | 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 are 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" | ||
Stereo component amplifier assembly | ||
Navigation receiver assembly | ||
Map display is incomplete | SD card (disc player disc) | - |
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) | - |
SD card (disc player disc) | - | |
Navigation receiver assembly | ||
A message is displayed because map data cannot be read, and current position screen is not displayed | If a message appears only when driving on rough roads, check if the message disappears when vehicle is stopped | - |
SD card (disc player disc) | - | |
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 the smallest (a scale that shows a large area) | - |
SD card (disc player disc) | - | |
Navigation receiver assembly | ||
Customize parameters cannot be changed (customize parameters can be changed by using the GTS) | Navigation receiver assembly | |
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 |
---|---|---|
Pressing power switch does not turn on system | Proceed to "Navigation Receiver Assembly Power Source Circuit" | |
Navigation receiver assembly | ||
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 "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier" | ||
Proceed to "Speaker 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 "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier" | ||
Proceed to "Speaker Circuit" | ||
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 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 |
Symptom | Suspected Area | See page |
---|---|---|
Sound cannot be heard/sound quality is poor/loud noise occurs only when DAB function is used (when receiving DAB-TA, sound temporarily may not be heard) | Operate the volume switch and turn up the volume level | - |
Proceed to "Check DAB Reception" in Operation Check | ||
Antenna cord sub-assembly | ||
No. 2 antenna cord sub-assembly | ||
No. 1 amplifier antenna assembly | ||
Navigation receiver assembly | ||
When time shift mode is not selected, DAB-TA cannot be used | Check if DAB-TA function is set to on | - |
Check that "TP" icon is displayed on the screen | - | |
Check if similar symptoms occur with another vehicle | - | |
Navigation receiver assembly | ||
DAB-DAB Link, DAB-FM Link or Time-Shift cannot be used | Check if each function is set to on | - |
Check if similar symptoms occur when receiving other broadcasts | - | |
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
CD 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 | ||
CD cannot be inserted/played or CD is ejected right after insertion | Proceed to "Check Optical Disc Error History" in Operation Check | |
Proceed to "CD cannot be Inserted or is Ejected Right After Insertion" | ||
CD cannot be ejected | Proceed to "Check Optical Disc Error History" in Operation Check | |
Proceed to "CD cannot be Ejected" | ||
CD sound skips | Proceed to "Check Optical Disc Error History" in Operation Check | |
Proceed to "CD Sound Skips" | ||
Sound quality is bad only when CD is played (volume is too low) | Proceed to "Check Optical Disc Error History" in Operation Check | |
Proceed to "Sound Quality is Bad Only when CD is Played (Volume is Too Low)" | ||
When CD is playing, some cover art is not displayed | When a song unregistered to the Gracenote CDDB is playing, its cover art cannot be displayed | - |
When CD is playing, cover art cannot be displayed | Navigation receiver assembly | |
Album cover art cannot be displayed | Check that Display Cover Art on the disc 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 |
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 | ||
Screen is distorted or not displayed only when using a device connected to the No. 1 stereo jack adapter assembly | Check if the appropriate image signal setting (NTSC/PAL) is selected | - |
Connect a known good device to the No. 1 stereo jack adapter assembly and check if an image is output | - | |
Connect using a known good cable and check if an 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 |
---|---|---|
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 is 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 play 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" or USB 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 if the priority display of Gracenote database album cover art setting is off | - |
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 | ||
"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 the "iPod" is set to output images | - |
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 an 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 |
---|---|---|
Voice menu screen is not displayed (voice recognition function does not turn on) | Check if the voice recognition prompt function is on | - |
Proceed to "Panel Switches do not Function" | ||
Proceed to "Steering Pad Switch Circuit" | ||
Navigation receiver assembly | ||
When voice recognition switch is pressed, a short beep is emitted but voice cannot be recognized properly | Proceed to "Voice is not Recognized" | |
Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly" | ||
SD card (disc player disc) | - | |
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
"Bluetooth" is inoperative (in-vehicle device cannot be recognized by the cellular phone) | Proceed to "Cellular Phone Inspection" | |
Navigation receiver assembly | ||
"Bluetooth" compatible cellular phone cannot be registered | Proceed to "Cellular Phone Registration Failure" | |
"Bluetooth" compatible cellular phone cannot be connected | Check that no other cellular phone is connected as a hands-free device | - |
Bring the cellular phone near the in-vehicle device and reconnect it | - | |
Proceed to "Cellular Phone Inspection" | ||
Navigation receiver assembly | ||
"Bluetooth" compatible cellular phone cannot be connected automatically (can be connected manually) | Check that "Bluetooth" automatic connection setting of the in-vehicle device is on | - |
Navigation receiver assembly | ||
"Bluetooth" compatible cellular phone connection is disconnected | Bring the cellular phone near the in-vehicle device and check if it is reconnected | - |
Proceed to "Cellular Phone Inspection" | ||
Navigation receiver assembly | ||
Message that prompts to check the cellular phone is displayed | Bring the cellular phone near the in-vehicle device and check if it is reconnected | - |
Proceed to "Cellular Phone Inspection" | ||
Navigation receiver assembly | ||
When the power switch is turned on (ACC), instructions for checking the connection condition between the in-vehicle device and cellular phone are displayed | Turn the cellular phone connection conformation display on the in-vehicle device off | - |
Phonebook data cannot be transferred | Check that the phonebook data automatic transfer setting of the in-vehicle device is on | - |
Enter "1234" into the "Bluetooth" phone (when transferring phonebook data, OBEX authentication may be required) | - | |
Check that no applications on the cellular phone are operating | - | |
If using "Bluetooth" audio function, cancel the "Bluetooth" audio player connection and check the operation | - | |
Transfer phonebook data manually | - | |
Proceed to "Cellular Phone Inspection" | ||
Navigation receiver assembly | ||
Phonebook data is cleared | Navigation receiver assembly | |
Phonebook data cannot be edited | Check that the phonebook data automatic transfer setting is off | - |
Navigation receiver assembly | ||
All the transferred phonebook data is sorted to "Other" | Check that no applications on the cellular phone are operating | - |
Check that phonebook data in the cellular phone is not stored to the SIM card | - | |
Proceed to "Cellular Phone Inspection" | ||
Explain to the customer that all the transferred phonebook data may be stored to "Other" depending on cellular phone | - | |
Cellular phone cannot make outgoing/incoming calls | Move the vehicle into a cellular phone service area, check that the "Bluetooth" device is connected to the vehicle and operate device again | - |
Check that the cellular phone can make outgoing/incoming calls properly when not connected via "Bluetooth" | - | |
Proceed to "Cellular Phone Inspection" | ||
Navigation receiver assembly | ||
Other caller's voice is interrupted by noise or sound quality is poor | Check the receiving voice volume (if it is too high, voice may sound distorted) | - |
Make a call with the cellular phone disconnected from "Bluetooth" and check that other caller's voice can be heard clearly | - | |
Proceed to "Check Hands-free Voice Quality Setting" in Operation Check | ||
Proceed to "Cellular Phone Inspection" | ||
Navigation receiver assembly | ||
Other caller's voice cannot be heard | Check that reception voice volume is not set to minimum | - |
Make a call with the cellular phone disconnected from "Bluetooth" and check that other caller's voice can be heard clearly | - | |
Proceed to "Check Hands-free Voice Quality Setting" in Operation Check | ||
Proceed to "Cellular Phone Inspection" | ||
Navigation receiver assembly | ||
Caller's voice (your voice) is interrupted by noise or sound quality is poor | Check the transmitting voice volume (if it is too high, voice may sound distorted) | - |
Check that nothing can cause noise around the microphone (an outlet of the air conditioning system facing the microphone, wind from an open window, additional devices, etc. may affect noise occurrence) | - | |
Proceed to "Check Hands-free Voice Quality Setting" in Operation Check | ||
Proceed to "Cellular Phone Inspection" | ||
Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly" | ||
Navigation receiver assembly | ||
Other caller cannot hear your voice | When talking on the cellular phone, check that the mute button is not pressed | - |
Check that nothing can cause noise around the microphone (an outlet of the air conditioning system facing the microphone, wind from an open window, additional devices, etc. may affect noise occurrence) | - | |
Proceed to "Check Hands-free Voice Quality Setting" in Operation Check | ||
Proceed to "Cellular Phone Inspection" | ||
Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly" | ||
Navigation receiver assembly | ||
No notification when a new SMS/MMS/e-mail has been received | Check the SMS/MMS/e-mail notification settings on the cellular phone and the navigation receiver assembly | - |
Proceed to "Cellular Phone Inspection" | ||
Navigation receiver assembly | ||
Received SMS/MMS/e-mail cannot be read | Check the SMS/MMS/e-mail transfer settings on the cellular phone and the navigation receiver assembly | - |
Proceed to "Cellular Phone Inspection" | ||
Navigation receiver assembly | ||
SMS/MMS/e-mail cannot be replied to | Move the vehicle into a cellular phone service area, and check the operation of the navigation receiver assembly and cellular phone | - |
Check that the cellular phone can send an SMS/MMS/e-mail | - | |
Proceed to "Cellular Phone Inspection" | ||
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 | 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 |
---|---|---|
"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 hybrid control system operating | - |
Navigation receiver assembly | ||
Cruise range is not displayed on "Trip Information" screen | Turn the power switch on (IG) and recheck | - |
Navigation receiver assembly | ||
Graph is not updated on "Past record" screen even though "Clear" is selected | Turn the power switch on (IG) and recheck | - |
Navigation receiver assembly | ||
Graph is not displayed on "Past record" screen | Turn the power switch on (IG) and recheck | - |
Navigation receiver assembly |
Symptom | Suspected Area | See page |
---|---|---|
A Toyota Link function error message is displayed on the screen | Follow the on screen instructions | - |
Proceed to "Confirm Cellular Phone Functionality" | ||
Proceed to "Confirm Vehicle Headunit Functionality" | ||
Proceed to "Toyota Link Reset Procedure" in Operation Check | ||
Navigation receiver assembly | ||
Toyota Link apps and services are not operating as expected | Proceed to "Confirm Cellular Phone Functionality" | |
Proceed to "Confirm Vehicle Headunit Functionality" | ||
Proceed to "Toyota Link Reset Procedure" in Operation Check | ||
Navigation receiver assembly | ||
Toyota Link voice recognition is not possible (voice recognition on the navigation system is normal) | Proceed to "Confirm Cellular Phone Functionality" | |
Proceed to "Confirm Vehicle Headunit Functionality" | ||
Proceed to "Toyota Link Reset Procedure" in Operation Check | ||
Navigation receiver assembly | ||
Sound quality of Toyota Link function is poor | Check that cellular phone handset volume is turned up | - |
Check that adequate signal is maintained while the vehicle is being driven | - | |
Proceed to "Confirm Cellular Phone Functionality" | ||
Proceed to "Confirm Vehicle Headunit Functionality" | ||
Proceed to "Toyota Link Reset Procedure" in Operation Check | ||
Navigation receiver assembly |