AUDIO AND VISUAL SYSTEM 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 Link
Black screen (no image appears on the screen) Proceed to "Black Screen"

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Proceed to "Check Software Error History" in Operation Check

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Radio and display receiver assembly

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Display does not dim (does not change to night screen) when light control switch in tail position Proceed to "Display does not Dim when Light Control Switch is Turned ON"

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Proceed to "Illumination Circuit"

Click here

Radio and display receiver assembly

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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

Radio and display receiver assembly

Click here

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

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Proceed to "Radio Receiver Power Source Circuit"

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

Radio and display receiver assembly

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

Click here

Radio and display receiver assembly

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General Audio Function
Symptom Suspected Area Link
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"*1

Click here

Proceed to "Mute Signal Circuit between Radio Receiver and Telematics Transceiver"*3

Click here

Proceed to "Speaker Circuit"

Click here

Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier"*1

Click here

Stereo component amplifier assembly*1

Click here

Telematics transceiver*3

Click here

Radio and display receiver assembly

Click here

Abnormal noise occurs Proceed to "Noise Occurs"

Click here

Stereo component amplifier assembly*1

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 Telematics Transceiver"*3

Click here

Proceed to "Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier"*1

Click here

Proceed to "Speaker Circuit"

Click here

Proceed to "Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier"*1

Click here

Stereo component amplifier assembly*1

Click here

Telematics transceiver*3

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 Radio Receiver and Combination Meter"*2

Click here

Proceed to "Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter"*1

Click here

Stereo component amplifier assembly*1

Click here

Radio and display receiver assembly

Click here

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

Click here

Proceed to "Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier"*1

Click here

Proceed to "Mute Signal Circuit between Radio Receiver and Telematics Transceiver"*3

Click here

Proceed to "Speaker Circuit"

Click here

Proceed to "Voice Guidance Circuit between Radio Receiver and Stereo Component Amplifier"*1

Click here

Telematics transceiver*3

Click here

Stereo component amplifier assembly*1

Click here

Radio and display receiver assembly

Click here


Panel Switch and Touch Panel Switch Function
Symptom Suspected Area Link
Illumination for panel switches does not illuminate when light control switch in tail position 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

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

Radio and display receiver assembly

Click here

Steering Pad Switch Function
Symptom Suspected Area Link
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

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Illumination for steering pad switch does not illuminate when light control switch in tail position Proceed to "Illumination Circuit"

Click here

Radio and display receiver assembly

Click here

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

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

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Radio station information can be displayed but radio broadcast cannot be heard from speakers Check audio system volume is not set to minimum -
Radio and display receiver assembly

Click here

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

Click here

No. 1 stereo jack adapter assembly

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

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Radio and display receiver assembly

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

Click here

No. 1 stereo jack adapter assembly

Click here

Radio and display receiver assembly

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

Click here

No. 1 stereo jack adapter assembly

Click here

Radio and display receiver assembly

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

Click here

Radio and display receiver assembly

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

Click here

Radio and display receiver assembly

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" -
Radio and display receiver assembly

Click here

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

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No. 1 stereo jack adapter assembly

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Radio and display receiver assembly

Click here

Screen is distorted or not displayed only when using the video function of an "iPod" (w/ "iPod" Video Function) Check if "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 the image is output -
Proceed to "Data Signal Circuit between Radio Receiver and Stereo Jack Adapter"

Click here

No. 1 stereo jack adapter assembly

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 (w/ USB Video Function) 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 the image is output -
Proceed to "Data Signal Circuit between Radio Receiver and Stereo Jack Adapter"

Click here

No. 1 stereo jack adapter assembly

Click here

Radio and display receiver assembly

Click here

Voice Recognition Function (w/ Voice Recognition Function)
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"

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Proceed to "Steering Pad Switch Circuit"

Click here

Radio and display receiver assembly

Click here

When voice recognition switch is pressed, a short beep is emitted but voice cannot be recognized properly Proceed to "Voice is not Recognized"

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Proceed to "Microphone Circuit between Microphone and Radio Receiver"

Click here

Radio and display receiver assembly

Click here

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

Click here

Radio and display receiver assembly

Click here

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

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

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 -
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

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

Radio and display receiver assembly

Click here

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 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

Radio and display receiver assembly

Click here

Phonebook data is cleared 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 -
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 the 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

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 "Check Hands-free Voice Quality Setting" in Operation Check

Click here

Proceed to "Cellular Phone Inspection"

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 "Check Hands-free Voice Quality Setting" in Operation Check

Click here

Proceed to "Cellular Phone Inspection"

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 "Check Hands-free Voice Quality Setting" in Operation Check

Click here

Proceed to "Cellular Phone Inspection"

Click here

Proceed to "Microphone Circuit between Microphone and Radio Receiver"

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 "Check Hands-free Voice Quality Setting" in Operation Check

Click here

Proceed to "Cellular Phone Inspection"

Click here

Proceed to "Microphone Circuit between Microphone and Radio Receiver"

Click here

Radio and display receiver assembly

Click here

"Bluetooth" can be connected while driving Proceed to "Parking Brake Switch Circuit"

Click here

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

Click here

Radio and display receiver assembly

Click here

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"

Click here

Radio and display receiver assembly

Click here

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"

Click here

Radio and display receiver assembly

Click here

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"

Click here

Radio and display receiver assembly

Click here


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

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

Radio and display receiver assembly

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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

Radio and display receiver assembly

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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

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

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

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

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

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

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

Radio and display receiver assembly

Click here

Portable player cannot pause, select file, fast forward, fast rewind or 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

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"

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Radio and display receiver assembly

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

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Radio and display receiver assembly

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Fuel Consumption Function
Symptom Suspected Area Link
Graph is not displayed on "Trip Information" screen Recheck with the hybrid control system operating -
Radio and display receiver assembly

Click here

Cruise range is not displayed on "Trip Information" screen Turn the power switch on (IG) and recheck -
Radio and display receiver assembly

Click here

Graph is not updated on "Past record" screen even though "Clear" is selected Turn the power switch on (IG) and recheck -
Radio and display receiver assembly

Click here

Graph is not displayed on "Past record" screen Turn the power switch on (IG) and recheck -
Radio and display receiver assembly

Click here

Digital Audio Broadcast (DAB) Function (w/ DAB Function)
Symptom Suspected Area Link
DAB-DAB Link, DAB-FM Link or Time-Shift cannot be used DAB-DAB Link, DAB-FM Link or Time-Shift cannot be used -
Radio and display receiver assembly

Click here

Disc Player Function
Symptom Suspected Area Link
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

Click here

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

Click here

Radio and display receiver assembly

Click here

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

Click here

Proceed to "Disc cannot be Inserted or is Ejected Right After Insertion"

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

Click here

Proceed to "Disc cannot be Ejected"

Click here

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

Click here

Proceed to "CD/DVD Sound Skips"

Click here

While vehicle is stopped, DVD cannot be viewed even when parking brake is set (parking brake switch is on)*1 Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter"

Click here

Radio and display receiver assembly

Click here

Screen color is poor only when watching a DVD*1 Change the color settings on the screen adjustment screen -
Replace the disc with a known good one and check that the malfunction disappears -
Radio and display receiver assembly

Click here

Sound quality is bad only when disc is played (volume is too low) Check audio system volume is not set to minimum -
Proceed to "Check Optical Disc Error History" in Operation Check

Click here

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

Click here

Album cover art cannot be displayed*2 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 radio and display receiver assembly, update the Gracenote database to the latest version. -
Radio and display receiver assembly

Click here


"MirrorLink" Function (w/ "MirrorLink" Function)
Symptom Suspected Area Link
Although USB device or "iPod" is recognized, "MirrorLink" function cannot be started (smartphone battery can be charged) Proceed to "MirrorLink Function cannot be Started"

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Image is not displayed Proceed to "MirrorLink Image is not Displayed"

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Sound cannot be heard Proceed to "MirrorLink Sound cannot be Heard"

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

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Toyota Link Function (w/ Toyota Link Function)
Symptom Suspected Area Link
A Toyota Link system error message is displayed on the screen Follow the on screen instructions -
Proceed to "Confirm Cellular Phone Functionality"

Click here

Proceed to "Confirm Vehicle Headunit Functionality"

Click here

Proceed to "Toyota Link Reset Procedure" in Operation Check

Click here

Radio and display receiver assembly

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Toyota Link apps and services are not operating as expected Proceed to "Confirm Cellular Phone Functionality"

Click here

Proceed to "Confirm Vehicle Headunit Functionality"

Click here

Proceed to "Toyota Link Reset Procedure" in Operation Check

Click here

Radio and display receiver assembly

Click here

Toyota Link voice recognition is not possible (voice recognition on the audio and visual system is normal) Proceed to "Confirm Cellular Phone Functionality"

Click here

Proceed to "Confirm Vehicle Headunit Functionality"

Click here

Proceed to "Toyota Link Reset Procedure" in Operation Check

Click here

Radio and display receiver assembly

Click here

Poor sound quality of Toyota Link system Confirm that cellular phone handset volume is turned up -
Confirm that adequate signal is maintained during driving -
Proceed to "Confirm Cellular Phone Functionality"

Click here

Proceed to "Confirm Vehicle Headunit Functionality"

Click here

Proceed to "Toyota Link Reset Procedure" in Operation Check

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Radio and display receiver assembly

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Remote Control Function (w/ Switch and Volume Assembly)
Symptom Suspected Area Link
Switch and volume assembly does not operate Clean the infrared receiving portion on the radio and display receiver assembly. -
Switch and volume assembly battery -
Switch and volume assembly -
Radio and display receiver assembly

Click here