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 | Link |
|---|---|---|
| Black screen (no image appears on navigation/audio screen) | Proceed to "Black Screen" | |
| Proceed to "Check Software Error History" in Operation Check | ||
| Proceed to "Display Signal Circuit between Radio Receiver and Extension Module"*1 | ||
| 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" | |
| Proceed to "Display Signal Circuit between Radio Receiver and Extension Module"*1 | ||
| 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" | ||
| Proceed to "Display Signal Circuit between Radio Receiver and Extension Module"*1 | ||
| Navigation ECU | ||
| Radio and display receiver assembly |
*1: Before proceeding with the following procedure, activate and deactivate diagnostic mode by operating the panel switches. This will correct the display signal.
| Symptom | Suspected Area | Link |
|---|---|---|
| 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 being driven | 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 |
| Symptom | Suspected Area | Link |
|---|---|---|
| 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 | ||
| Illumination for steering pad switch does not come on with tail switch on | Proceed to "Illumination Circuit" |
| Symptom | Suspected Area | Link |
|---|---|---|
| Image data in USB device cannot be displayed | 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" | ||
| Proceed to "Display Signal Circuit between Radio Receiver and Extension Module"*1 | ||
| No. 1 stereo jack adapter assembly | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Message indicating that USB device cannot be accessed is displayed | Check that the USB device has not been disconnected while the extension module is recognizing it | - |
| Proceed to "USB Audio System Recognition/Play Error" | ||
| No. 1 stereo jack adapter assembly | ||
| Navigation ECU |
*1: Before proceeding with the following procedure, activate and deactivate diagnostic mode by operating the panel switches. This will correct the display signal.
| Symptom | Suspected Area | Link |
|---|---|---|
| Vehicle position mark deviates | Proceed to "Vehicle Position Mark Deviates Greatly" | |
| No. 1 navigation antenna cord sub-assembly | ||
| Navigation antenna assembly | ||
| Navigation ECU | ||
| Vehicle position mark deviates from correct position and does not return to correct position | Proceed to "Vehicle Position Mark Deviates Greatly" | |
| No. 1 navigation antenna cord sub-assembly | ||
| Navigation antenna assembly | ||
| Navigation ECU | ||
| Vehicle position mark moves slow or fast | Proceed to "Vehicle Position Mark Deviates Greatly" | |
| 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) | - | |
| No. 1 navigation antenna cord sub-assembly | ||
| 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 is not updated | Navigation ECU | |
| Current position display does not appear | No. 1 navigation antenna cord sub-assembly | |
| Navigation antenna assembly | ||
| Navigation ECU | ||
| Voice guidance does not function | Proceed to "Voice Guidance does not Function" | |
| Proceed to "Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier"*1 | ||
| Proceed to "Mute Signal Circuit between Radio Receiver and Extension Module" | ||
| Proceed to "Navigation Voice Circuit between Radio Receiver and Stereo Component Amplifier"*1 | ||
| Proceed to "Navigation Voice Circuit between Radio Receiver and Extension Module" | ||
| Proceed to "Speaker Circuit" | ||
| Stereo component amplifier assembly*1 | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Map display is incomplete | Proceed to "Map Display Incomplete" | |
| Proceed to "Display Signal Circuit between Radio Receiver and Extension Module"*2 | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Route cannot be calculated | Proceed to "Route cannot be Calculated" | |
| Navigation ECU | ||
| Extension module cannot record memory point registration or each item setting | 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 |
*1: for 9 Speakers
*2: Before proceeding with the following procedure, activate and deactivate diagnostic mode by operating the panel switches. This will correct the display signal.
| Symptom | Suspected Area | Link |
|---|---|---|
| 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 "Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier"*1 | ||
| Proceed to "Mute Signal Circuit between Radio Receiver and Extension Module" | ||
| Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier"*1 | ||
| Proceed to "Sound Signal Circuit between Radio Receiver and Extension Module" | ||
| Proceed to "Speaker Circuit" | ||
| Stereo component amplifier assembly*1 | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Abnormal noise occurs | Proceed to "Noise Occurs" | |
| Stereo component amplifier assembly*1 | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Sound quality is bad in all modes (volume is too low) | Proceed to "Poor Sound Quality in All Modes (Low Volume)" | |
| Proceed to "Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier"*1 | ||
| Proceed to "Mute Signal Circuit between Radio Receiver and Extension Module" | ||
| Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier"*1 | ||
| Proceed to "Sound Signal Circuit between Radio Receiver and Extension Module" | ||
| Proceed to "Speaker Circuit" | ||
| Stereo component amplifier assembly*1 | ||
| 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"*2 | ||
| Proceed to "Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter"*1 | ||
| Stereo component amplifier assembly*1 | ||
| Navigation ECU | ||
| Radio and display receiver assembly |
*1: for 9 Speakers
*2: for 6 Speakers
| Symptom | Suspected Area | Link |
|---|---|---|
| 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 |
| Symptom | Suspected Area | Link |
|---|---|---|
| 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 / Played or CD 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)" |
| Symptom | Suspected Area | Link |
|---|---|---|
| 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" 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 | Link |
|---|---|---|
| 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" | ||
| Proceed to "Steering Pad Switch Circuit" | ||
| Radio and display 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 Radio Receiver and Extension Module" | ||
| Proceed to "Microphone Circuit between Microphone and Radio Receiver" | ||
| Navigation ECU | ||
| Radio and display receiver assembly |
| Symptom | Suspected Area | Link |
|---|---|---|
| Bluetooth is inoperative | 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 | ||
| Cellular phone registration failure | Proceed to "Cellular Phone Registration Failure, Phonebook Transfer Failure" | |
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Cellular phone cannot make outgoing/incoming calls or call in a certain place | Proceed to "Cellular Phone cannot Make Outgoing/Incoming Calls" | |
| Proceed to "Steering Pad Switch Circuit" | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| Message that prompts to check the cellular phone is displayed | Proceed to "Cellular Phone cannot Make Outgoing/Incoming Calls" | |
| Navigation ECU | ||
| 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" | ||
| Navigation ECU | ||
| 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 "The Other Caller's Voice cannot be Heard, is too Quiet, or Distorted" | |
| Navigation ECU | ||
| Radio and display 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 "The Other Caller cannot Hear Your Voice, or Your Voice is too Quiet or Distorted" | |
| Proceed to "Microphone Circuit between Microphone and Radio Receiver" | ||
| Proceed to "Microphone Circuit between Radio Receiver and Extension Module" | ||
| Navigation ECU | ||
| Radio and display receiver assembly | ||
| E-mail/SMS cannot be received or sent | 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/SMS via the navigation system setting | - | |
| Proceed to "Cellular Phone Registration Failure, Phonebook Transfer Failure" | ||
| Navigation ECU | ||
| Radio and display receiver assembly |
| Symptom | Suspected Area | Link |
|---|---|---|
| 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" | |
| Navigation ECU | ||
| 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 and 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" | |
| Navigation ECU | ||
| 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 | Link |
|---|---|---|
| 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 and 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" | |
| Proceed to "Data Signal Circuit between Stereo Jack Adapter and Extension Module" | ||
| No. 1 stereo jack adapter assembly | ||
| Navigation ECU | ||
| Track information such as track, artist and album names is not displayed | Proceed to "USB Audio System Recognition/Play Error" | |
| Proceed to "Data Signal Circuit between Stereo Jack Adapter and Extension Module" | ||
| No. 1 stereo jack adapter assembly | ||
| Navigation ECU | ||
| USB device or "iPod" is recognized but cannot play nor play in a sorted order | Proceed to "USB Audio System Recognition/Play Error" | |
| Proceed to "Data Signal Circuit between Stereo Jack Adapter and Extension Module" | ||
| No. 1 stereo jack adapter assembly | ||
| Navigation ECU | ||
| 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" | |
| No. 1 stereo jack adapter assembly | ||
| Navigation ECU |
| Symptom | Suspected Area | Link |
|---|---|---|
| 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 | Link |
|---|---|---|
| Connection to the search engine fails | Proceed to "Connected Services Outline" in System Description | |
| Check if each item is set correctly | - | |
| Check if the cellular phone is in standby mode | - | |
| Check if the cellular phone is compatible with the connected service | - | |
| Navigation ECU | ||
| 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 | ||
| 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 |
| Symptom | Suspected Area | Link |
|---|---|---|
| Graph is not displayed on "Trip Information" screen | Recheck with the hybrid control system operating | - |
| Radio and display receiver assembly | ||
| Cruise range is not displayed on "Trip Information" screen | Turn the power switch on (READY) and recheck | - |
| Radio and display receiver assembly | ||
| Graph is not updated on "Past record" screen even though "Clear" is selected | Turn the power switch on (READY) and recheck | - |
| Radio and display receiver assembly | ||
| Graph is not displayed on "Past record" screen | Turn the power switch on (READY) and recheck | - |
| Radio and display receiver assembly |