NAVIGATION SYSTEM (for Radio and Display Type) PROBLEM SYMPTOMS TABLE

Tech Tips


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

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

Display Function
Symptom Suspected Area See page
Black screen (no image appears on the screen) Proceed to "Black Screen"

Click here

Proceed to "Check Software Error History" in Operation Check

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Proceed to "Illumination Circuit"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

Power does not turn off (screen remains on) Proceed to "Radio Receiver Power Source Circuit"

Click here

Radio and display receiver assembly

Click here

Screen is distorted Proceed to "Radio Receiver Power Source Circuit"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Proceed to "Radio Receiver Power Source Circuit"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

Navigation function switches can be operated while vehicle being driven Proceed to "Parking Brake Switch Circuit"

Click here

Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Extension Module"

Click here

Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

Navigation Function
Symptom Suspected Area See page
Date and time on navigation screen are different from actual date and time Proceed to "Vehicle Position Mark Deviates Greatly"

Click here

Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Extension Module"

Click here

Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter"

Click here

Navigation antenna assembly

Click here

Navigation ECU

Click here

Vehicle position mark moves slow or fast Proceed to "Vehicle Position Mark Deviates Greatly"

Click here

Drive the vehicle for sensor learning (at a place where GPS signals can be received, drive the vehicle clockwise and counterclockwise in at least a 200 meter square 2 times or more) -
Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Extension Module"

Click here

Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter"

Click here

Navigation antenna assembly

Click here

Navigation ECU

Click here

Vehicle position mark deviates from correct position and does not return to correct position Proceed to "Vehicle Position Mark Deviates Greatly"

Click here

Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Extension Module"

Click here

Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter"

Click here

Navigation antenna assembly

Click here

Navigation ECU

Click here

Vehicle position mark is not updated Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Extension Module"

Click here

Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter"

Click here

Navigation antenna assembly

Click here

Navigation ECU

Click here

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

Click here

Navigation ECU

Click here

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

Click here

Navigation ECU

Click here

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

Click here

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

Click here

Proceed to "Voice Guidance Circuit between Radio Receiver and Stereo Component Amplifier"

Click here

Proceed to "Speaker Circuit"

Click here

Stereo component amplifier assembly

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

Map display is incomplete Proceed to "Map Display Incomplete"

Click here

Navigation ECU

Click here

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

Click here

Navigation ECU

Click here

Traffic information is not displayed on navigation screen Proceed to "Radio Broadcast cannot be Received or Poor Reception"

Click here

Navigation system cannot record memory point registration or each item setting Navigation ECU

Click here

A message indicating to wait for a while because of low temperature is displayed Start the engine and increase cabin temperature (near navigation ECU) -
Navigation ECU

Click here

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 -
Navigation ECU

Click here

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

Click here

Customize parameters cannot be changed (customize parameters can be changed by using the GTS) Navigation ECU

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

General Audio Function
Symptom Suspected Area See page
Pressing power switch does not turn on system Proceed to "Radio Receiver Power Source Circuit"

Click here

Radio and display receiver assembly

Click here

No sound can be heard from speakers Proceed to "No Sound can be Heard from Speakers"

Click here

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

Click here

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

Click here

Proceed to "Speaker Circuit"

Click here

Stereo component amplifier assembly

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

Abnormal noise occurs Proceed to "Noise Occurs"

Click here

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

Click here

Stereo component amplifier assembly

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

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

Click here

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

Click here

Proceed to "Speaker Circuit"

Click here

Stereo component amplifier assembly

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Stereo component amplifier assembly

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Proceed to "Illumination Circuit"

Click here

Radio and display receiver assembly

Click here

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

Click here

Proceed to "Radio Receiver Power Source Circuit"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Proceed to "Radio Receiver Power Source Circuit"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

Navigation function switches can be operated while vehicle being driven Proceed to "Parking Brake Switch Circuit"

Click here

Radio and display receiver assembly

Click here

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

Click here

Proceed to "Steering Pad Switch Circuit"

Click here

Radio and display receiver assembly

Click here

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

Click here

Radio and display receiver assembly

Click here

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

Click here

Radio broadcast can be received but radio station cannot be displayed (some radio stations do not provide their name information) Radio and display receiver assembly

Click here

Radio broadcast can be displayed but radio broadcast cannot be heard from speakers Operate the volume switch and turn up the volume level -
Radio and display receiver assembly

Click here

CD Player Function
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 CD is compatible with the CD player

Click here

Proceed to "Check Optical Disc Error History" in Operation Check

Click here

Radio and display receiver assembly

Click here

CD cannot be inserted/played or CD is ejected right after insertion Proceed to "Check Optical Disc Error History" in Operation Check

Click here

Proceed to "CD cannot be Inserted / Played or CD is Ejected Right After Insertion"

Click here

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

Click here

Proceed to "CD cannot be Ejected"

Click here

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

Click here

Proceed to "CD Sound Skips"

Click here

Sound quality is bad only when CD is played (volume is too low) Change the sound settings on the adjustment screen -
Proceed to "Check Optical Disc Error History" in Operation Check

Click here

Proceed to "Sound Quality is Bad Only when CD is Played (Volume is Too Low)"

Click here

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

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Radio and display receiver assembly

Click here

"AUX/VTR" is not displayed on system check mode screen Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter"

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Radio and display receiver assembly

Click here

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 the image is output -
Connect using a known good cable and check if an image is output -
Proceed to "Display Signal Circuit between Radio Receiver and Stereo Jack Adapter"

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Radio and display receiver assembly

Click here

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

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Navigation ECU

Click here

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

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Navigation ECU

Click here

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

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Navigation ECU

Click here

USB device or "iPod" is recognized but cannot play or play in a sorted order Proceed to "USB Audio System Recognition/Play Error"

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Navigation ECU

Click here

Album cover art cannot be displayed Check that Display Cover Art on the USB device or "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 radio and display receiver assembly, update the Gracenote database to the latest version -
Navigation ECU

Click here

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 "iPod" -
Navigation ECU

Click here

"iPod" battery cannot be charged Proceed to "USB Audio System Recognition/Play Error"

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Navigation ECU

Click here

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 mode -
Connect using a known good cable and check if an image is output -
Proceed to "Data Signal Circuit between Stereo Jack Adapter and Extension Module"

Click here

Proceed to "Display Signal Circuit between Radio Receiver and Stereo Jack Adapter"

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

Screen is distorted or not displayed only when using the USB device connected to the No. 1 stereo jack adapter assembly Check if the appropriate image signal setting (NTSC/PAL) is selected -
Check if video sound input is set to A/V mode -
Connect a known good USB device to the No. 1 stereo jack adapter assembly and check if the image is output -
Connect using a known good cable and check if an image is output -
Proceed to "Data Signal Circuit between Stereo Jack Adapter and Extension Module"

Click here

Proceed to "Display Signal Circuit between Radio Receiver and Stereo Jack Adapter"

Click here

No. 1 stereo jack adapter assembly (w/ Wireless Charger)

Click here

No. 1 stereo jack adapter assembly (w/o Wireless Charger)

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

"Bluetooth" Hands-free Function
Symptom Suspected Area See page
"Bluetooth" is inoperative (In-vehicle device cannot be recognized by the cellular phone) Proceed to "Cellular Phone Inspection"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

"Bluetooth" compatible cellular phone cannot be registered Proceed to "Cellular Phone Registration Failure"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

"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"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

"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

Click here

Radio and display receiver assembly

Click here

"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"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

When the ignition switch is turned 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 to Navigation ECU 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 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"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

Phonebook data is cleared Navigation ECU

Click here

Radio and display receiver assembly

Click here

Phonebook data cannot be edited Check that the phonebook data automatic transfer setting of the in-vehicle device is off -
Navigation ECU

Click here

Radio and display receiver assembly

Click here

All the transferred phonebook data is sorted to "Other" Check that no applications on the cellular phone are running -
Check that phonebook data in the cellular phone is not stored to the SIM card -
Proceed to "Cellular Phone Inspection"

Click here

Explain to the customer that all the transferred phonebook data may be stored to "Other" depending on the 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"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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"

Click here

Proceed to "Microphone Circuit between Radio Receiver and Extension Module"

Click here

Proceed to "Microphone Circuit between Microphone and Radio Receiver"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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"

Click here

Proceed to "Microphone Circuit between Radio Receiver and Extension Module"

Click here

Proceed to "Microphone Circuit between Microphone and Radio Receiver"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

No notification when a new SMS/MMS/e-mail has been received*1 Check the SMS/MMS/e-mail notification settings on the cellular phone and the radio and display receiver assembly -
Proceed to "Cellular Phone Inspection"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

Received SMS/MMS/e-mail cannot be read*1 Check the SMS/MMS/e-mail transfer settings on the cellular phone and the radio and display receiver assembly -
Proceed to "Cellular Phone Inspection"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

SMS cannot be replied to*1 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"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here


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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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"

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

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

Click here

Navigation ECU

Click here

Radio and display receiver assembly

Click here

MirrorLink Function (w/ MirrorLink Function)
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"

Click here

Image is not displayed (image of USB audio system can be displayed) Proceed to "MirrorLink Image is not Displayed"

Click here

Sound cannot be heard (sound of USB audio system can be heard) Proceed to "MirrorLink Sound cannot be Heard"

Click here

"MirrorLink" is inoperative only when smartphone is connected to head unit Proceed to "MirrorLink is Inoperative"

Click here

Fuel Consumption Function
Symptom Suspected Area See page
Graph is not displayed on "Trip Information" screen Recheck with the engine running -
Radio and display receiver assembly

Click here

Cruise range is not displayed on "Trip Information" screen Turn the ignition switch to ON and recheck -
Radio and display receiver assembly

Click here

Graph is not updated on "Past record" screen even though "Clear" is selected Turn the ignition switch to ON and recheck -
Radio and display receiver assembly

Click here

Graph is not displayed on "Past record" screen Turn the ignition switch to ON and recheck -
Radio and display receiver assembly

Click here