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 navigation/audio screen.) | Proceed to "Black Screen" | |
| Proceed to "Check Software Error History" in Operation Check | ||
| Navigation ECU | ||
| Radio and display 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 ECU | ||
| Radio and display receiver assembly | ||
| Power does not turn off. (Screen remains on.) | Proceed to "Radio Receiver Power Source Circuit" | |
| Radio and display receiver assembly | ||
| Screen is distorted. | Proceed to "Radio Receiver Power Source Circuit" | |
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Screen flicker or color distortion | Proceed to "Screen Flicker or Color Distortion" | |
| Proceed to "Radio Receiver Power Source Circuit" | ||
| Navigation ECU | ||
| Radio and display 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" | ||
| Radio and display receiver assembly | ||
| Panel switches do not function. | Proceed to "Panel Switches do not Function" | |
| Proceed to "Radio Receiver Power Source Circuit" | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Touch panel switch does not function. | Proceed to "Touch Panel Switch does not Function" | |
| Proceed to "Radio Receiver Power Source Circuit" | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Navigation function switches can be operated while vehicle is driving | Proceed to "Parking Brake Switch Circuit" | |
| Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter" | ||
| Navigation ECU | ||
| Radio and display 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" | ||
| Radio and display receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| GPS mark is not displayed. | Proceed to "GPS Mark is not Displayed" | |
| Navigation antenna assembly | ||
| Navigation ECU | ||
| Date and time on navigation screen is different from actual date and time. | Proceed to "GPS Mark is not Displayed" | |
| Navigation antenna assembly | ||
| Navigation ECU | ||
| 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 ECU | ||
| Cursor or map rotates when vehicle is stopped. | Proceed to "Cursor or Map Rotates when Vehicle Stopped" | |
| Navigation ECU | ||
| 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 ECU | ||
| 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 | ||
| Radio and display receiver assembly | ||
| Vehicle position mark is not updated. | Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Extension Module" | |
| Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter" | ||
| Navigation antenna assembly | ||
| Navigation ECU | ||
| Vehicle position mark moves slow or fast. | Proceed to "GPS Mark is not Displayed" | |
| Navigation antenna assembly | ||
| Navigation ECU | ||
| Voice guidance does not function. | Proceed to "Speaker Circuit" | |
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Map display is incomplete. | Navigation ECU | |
| Route cannot be calculated. | Proceed to "Route cannot be Calculated" | |
| Navigation ECU | ||
| Navigation system cannot record memory point registration or each item setting. | Navigation ECU | |
| A message indicating to wait for a while because of low temperature is displayed. | Start the engine and increase cabin temperature (near navigation ECU). | - |
| Navigation ECU | ||
| 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 ECU | ||
| Traffic information is not displayed on navigation screen. | Proceed to "Radio Broadcast cannot be Received or Poor Reception" | |
| 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 ECU | ||
| Reverse signal does not change in vehicle signal check mode. | Proceed to "Reverse Signal Circuit" | |
| Radio and display receiver assembly | ||
| Parking brake switch signal does not change in vehicle signal check mode. | Proceed to "Parking Brake Switch Circuit" | |
| Radio and display receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Pressing power switch does not turn on system. | Proceed to "Radio Receiver Power Source Circuit" | |
| Radio and display receiver assembly | ||
| No sound can be heard from speakers. | Proceed to "No Sound can be Heard from Speakers" | |
| Proceed to "Speaker circuit" | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Abnormal noise occurs. | Proceed to "Noise Occurs" | |
| Navigation ECU | ||
| Radio and display 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 "Speaker circuit" | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| ASL does not function. | Check that the ASL function is on. | - |
| Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter" | ||
| Radio and display 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.) | Radio and display receiver assembly | |
| Radio broadcast can be displayed but radio broadcast cannot be heard from speakers | Check the volume settings | - |
| Radio and display 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 | ||
| Radio and display 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 Sound Skips" | ||
| 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 Radio Receiver and Stereo Jack Adapter" | |
| No. 1 stereo jack adapter assembly | ||
| Radio and display receiver assembly | ||
| "AUX/VTR" is not displayed on system check mode screen. | Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter" | |
| No. 1 stereo jack adapter assembly | ||
| Radio and display 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 ECU | ||
| Radio and display 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 ECU | ||
| Radio and display 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 ECU | ||
| Radio and display 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 ECU | ||
| Radio and display 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 ECU | ||
| Radio and display receiver assembly | ||
| When the ignition switch is turned on (to 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 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 running | - | |
| 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 ECU | ||
| Radio and display receiver assembly | ||
| Phonebook data is cleared | Navigation ECU | |
| Radio and display receiver assembly | ||
| Phonebook data cannot be edited | Check that the phonebook data automatic transfer setting is off | - |
| Navigation ECU | ||
| Radio and display 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 ECU | ||
| Radio and display 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 "Cellular Phone Inspection" | ||
| Navigation ECU | ||
| Radio and display 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 "Cellular Phone Inspection" | ||
| Navigation ECU | ||
| Radio and display 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 "Cellular Phone Inspection" | ||
| Proceed to "Microphone Circuit between Radio Receiver and Extension module" | ||
| Proceed to "Microphone Circuit between Microphone and Radio Receiver" | ||
| Navigation ECU | ||
| Radio and display 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 "Cellular Phone Inspection" | ||
| Proceed to "Microphone Circuit between Radio Receiver and Extension module" | ||
| Proceed to "Microphone Circuit between Microphone and Radio Receiver" | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| "Bluetooth" can be connected while driving | Proceed to "Parking Brake Switch Circuit" | |
| Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Extension Module" | ||
| Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter" | ||
| Navigation ECU | ||
| Radio and display 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 Radio and display receiver assembly | - |
| Proceed to "Cellular Phone Inspection" | ||
| Navigation ECU | ||
| Radio and display 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 radio and display receiver assembly and cellular phone | - |
| Check that the cellular phone can send an SMS/MMS/e-mail | - | |
| Proceed to "Cellular Phone Inspection" | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Received SMS/MMS/e-mail cannot be read | Check the SMS/MMS/e-mail transfer settings on the cellular phone and the radio and display receiver assembly | - |
| Proceed to "Cellular Phone Inspection" | ||
| Navigation ECU | ||
| Radio and display receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Portable player cannot be registered. | Proceed to "Portable Player cannot be Registered" | |
| Navigation ECU | ||
| Radio and display 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 ECU | ||
| Radio and display 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 ECU | ||
| Radio and display 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 ECU | ||
| Radio and display 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" | |
| Radio and display receiver assembly | ||
| Portable player does not play. | Proceed to "Does not Play even after Bluetooth Audio Mode is Selected" | |
| Navigation ECU | ||
| Radio and display 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 ECU | ||
| Radio and display 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" | |
| Radio and display 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 ECU | ||
| Radio and display 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 ECU | ||
| Radio and display 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 ECU | ||
| Radio and display receiver assembly | ||
| Noise occurs or sound skips when portable player plays. | Proceed to "Noise Occurs or Sound Skips when Portable Player Plays" | |
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Registered device cannot be deleted. | Proceed to "Registered Device cannot be Deleted" | |
| Navigation ECU | ||
| Radio and display 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 Stereo Jack Adapter an Extension Module" | |
| No. 1 stereo jack adapter assembly | ||
| Navigation ECU | ||
| USB device or "iPod" is not recognized. | Proceed to "USB Audio System Recognition/Play Error" | |
| No. 1 stereo jack adapter assembly | ||
| Navigation ECU | ||
| 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 ECU | ||
| 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 ECU | ||
| 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" - Radio and display receiver assembly | - | |
| Navigation ECU | ||
| "iPod" battery cannot be charged. | Proceed to "USB Audio System Recognition/Play Error" | |
| No. 1 stereo jack adapter assembly | ||
| Navigation ECU |
| Symptom | Suspected Area | See page |
|---|---|---|
| Connection to search engine fails | Proceed to "Connected Services" in System Description | |
| 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 | - | |
| Check if similar symptoms occur with another vehicle | - | |
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| POIs are not displayed on list (when using a USB device) | Check if POIs are stored in the USB device root folder | - |
| Check that POIs with extension ".poi" are stored in the USB device | - | |
| Check that 256 character (ASCII) file names are 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 | ||
| Radio and display receiver assembly | ||
| POIs cannot be registered to 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 | ||
| Radio and display receiver assembly | ||
| Panoramio photos or Google street view cannot be displayed on map even though map scale is changed | Check if Panoramio photos or Google street view can be displayed at a different point | - |
| Navigation ECU | ||
| Google street view "Next" or "Previous" switches cannot be selected | Wait for 90 seconds and check if the switches can be selected | - |
| Navigation ECU | ||
| Radio and display receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| TPEG information (traffic/parking) is not displayed on navigation screen | After turning the ignition switch from off to ACC, check if TPEG information (traffic/parking) is displayed | - |
| Check that the reception setting is set to a position other than off If the symptom occurs in the roaming area, check the roaming reception setting | - | |
| Check that the following settings are set to on ? Traffic information: "Show traffic info" ? Parking information: "Show parking icon" | - | |
| Check if similar symptoms occur with another vehicle | - | |
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| TPEG information (traffic/parking) cannot be received automatically | Check that the reception setting is set to auto If the symptom occurs in the roaming area, check the roaming reception setting | - |
| Change the reception setting to auto and wait for 10 minutes with the navigation screen on If an error code or error message is displayed, perform the inspection according to the displayed error code or error message | - | |
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| TPEG information (traffic/parking) cannot be received manually | Check that the reception setting is set to manual If the symptom occurs in the roaming area, check the roaming reception setting | - |
| Push the update switch and wait for 1 minute with the navigation screen on Then, if an error code or error message is displayed, perform the inspection according to the displayed error code or error message | - | |
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Detour search using TPEG information does not operate | Check that "Show traffic info" is set to "On" | - |
| Check that "Avoid traffic events" is set to "Auto" or "Manual" | - | |
| Check that "Consider predictive traffic events" is set to "On" | - | |
| Navigation ECU | ||
| Radio and display receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Although USB device or "iPod" is recognized, MirrorLink function cannot be started (smartphone battery can be charged) | Proceed to "MirrorLink Function cannot be Started" | |
| Image is not displayed | Proceed to "MirrorLink Image is not Displayed" | |
| Sound cannot be heard | Proceed to "MirrorLink Sound cannot be Heard" | |
| MirrorLink is inoperative only when smartphone is connected to head unit | Proceed to "MirrorLink is Inoperative" |
| 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 | - |
| Radio and display receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| "Fuel Consumption" icon is dimmed. | Check if other icons or items displayed on screen have any problems. | - |
| Radio and display receiver assembly | ||
| Graph is not displayed on "Trip Information" screen. | Recheck with the engine running. | - |
| Radio and display receiver assembly | ||
| Cruise range is not displayed on "Trip Information" screen. | Turn ignition switch to ON and recheck. | - |
| Radio and display receiver assembly | ||
| Graph is not updated on "Past record" screen even though "Clear" is selected. | Turn ignition switch to ON and recheck. | - |
| Radio and display receiver assembly | ||
| Graph is not displayed on "Past record" screen. | Turn ignition switch to ON and recheck. | - |
| Radio and display receiver assembly |