Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Navigation / Multi Info Display / Navigation System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

After replacing the navigation receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, registration of the XM radio ID is necessary.

HINT:

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 navigation/audio screen)	Proceed to "Black Screen"
	Proceed to "Check Software Error History" in Operation Check
	Navigation 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 receiver assembly
Power does not turn off (Screen remains on)	Proceed to "Navigation Receiver Assembly Power Source Circuit"
Power does not turn off (Screen remains on)	Navigation receiver assembly
Screen is distorted	Proceed to "Navigation Receiver Assembly Power Source Circuit"
Screen is distorted	Navigation receiver assembly
Screen flicker or color distortion	Proceed to "Screen Flicker or Color Distortion"
	Proceed to "Navigation Receiver Assembly Power Source Circuit"
	Navigation receiver assembly

Panel Switch and Touch 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"
	Proceed to "Illumination Circuit"
	Navigation receiver assembly
Panel switches do not function	Proceed to "Panel Switches do not Function"
	Proceed to "Navigation Receiver Assembly Power Source Circuit"
	Navigation receiver assembly
Touch panel switch does not function	Proceed to "Touch Panel Switch does not Function"
	Proceed to "Navigation Receiver Assembly Power Source Circuit"
	Navigation receiver assembly
Navigation function switches can be operated while vehicle is driving	Proceed to "Parking Brake Switch Circuit"
	Navigation receiver assembly

Steering Pad Switch Function

Symptom	Suspected Area	See page
System cannot be operated by steering pad switch	Proceed to "Panel Switches do not Function"
	Proceed to "Steering Pad Switch Circuit"
	Navigation receiver assembly
Illumination for steering pad switch does not come on with tail switch on	Proceed to "Illumination Circuit"
	Navigation receiver assembly

Customize Startup Image or Screen Off Image Function

Symptom	Suspected Area	See page
Screen cannot be changed to UIC setting screen	Navigation receiver assembly
Thumbnails for opening image setting or screen off image setting do not update when USB device is connected	Check that the USB device was not disconnected while transferring an image	-
	Check that the screen was not changed to another function menu while transferring an image	-
	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
Transfer button cannot be pressed	Check that a USB device is connected	-
	Check that the USB device is not in use (USB audio system is playing etc.)	-
	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
Image data in USB device cannot be displayed	Check that the designated folder name is used	-
	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"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
Set opening image or screen off image is not displayed	Check if it is the first start-up after disconnecting and reconnecting the +B terminal (Reading from the SD card may be slow when the system is first starting-up)	-
	Set the opening image or screen off image again	-
	Navigation receiver assembly
Stored image cannot be deleted	Navigation receiver assembly
Message indicating that USB device cannot be accessed is displayed	Check that the USB device has not been disconnected while the navigation system is recognizing it	-
	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
Thumbnail images for opening image or screen off image are not displayed on setting screen	Check if it is the first start-up after disconnecting and reconnecting the +B terminal (Reading from the HDD may be slow when the system is first starting-up)	-
	Set the opening image or screen off image again	-
	Navigation receiver assembly
Image cannot be set for opening image or screen off image on setting screen	Set the opening image or screen off image again	-
	Navigation receiver assembly

Navigation Function

Symptom	Suspected Area	See page
GPS mark is not displayed	Proceed to "GPS Mark is not Displayed"
	Navigation antenna assembly
	Navigation receiver assembly
Date and time on navigation screen is different from actual date and time	Proceed to "GPS Mark is not Displayed"
	Navigation antenna assembly
	Navigation receiver assembly
Vehicle position mark deviates from correct position and does not return to correct position	Proceed to "GPS Mark is not Displayed"
	Navigation antenna assembly
	Navigation receiver assembly
Cursor or map rotates when vehicle is stopped	Proceed to "Cursor or Map Rotates when Vehicle Stopped"
Cursor or map rotates when vehicle is stopped	Navigation receiver assembly
Vehicle position mark moves in the opposite direction to the vehicle	Proceed to "Cursor or Map Rotates when Vehicle Stopped"
	Proceed to "Reverse Signal Circuit"
	Navigation receiver assembly
Vehicle position mark deviates from and returns to correct position repeatedly even though GPS mark is displayed	Proceed to "GPS Mark is not Displayed"
	Drive the vehicle for sensor learning (At a place where GPS signals can be received, drive the vehicle clockwise and counterclockwise in at least a 200 meter square 2 times or more)	-
	Navigation antenna assembly
	Navigation receiver assembly
Vehicle position mark moves slow or fast	Proceed to "GPS Mark is not Displayed"
	Navigation antenna assembly
	Navigation receiver assembly
Voice guidance does not function	Proceed to "Voice Guidance does not Function"
	Proceed to "Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"*1
	Proceed to "Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver"*2
	Proceed to "Speaker Circuit"
	Proceed to "Navigation Voice Circuit"
	Proceed to "Stereo Component Amplifier Power Source Circuit"*1
	DCM (Telematics transceiver)*2
	Stereo component amplifier assembly*1
	Navigation receiver assembly
Map display is incomplete	SD card	-
Map display is incomplete	Navigation receiver assembly
Route cannot be calculated	Proceed to "Route cannot be Calculated"
Route cannot be calculated	Navigation receiver assembly
Navigation system cannot record memory point registration or each item setting	Navigation receiver assembly
A message indicating to wait for a while because of low temperature is displayed	Start the engine and increase cabin temperature (near navigation receiver assembly)	-
	Navigation receiver assembly
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	-
	SD card	-
	Navigation receiver assembly
Traffic information is not displayed on navigation screen	Proceed to "Traffic Information is not Displayed"
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)	-
	SD card	-
	Navigation receiver assembly
Reverse signal does not change in vehicle signal check mode	Proceed to "Reverse Signal Circuit"
Reverse signal does not change in vehicle signal check mode	Navigation receiver assembly
Parking brake switch signal does not change in vehicle signal check mode	Proceed to "Parking Brake Switch Circuit"
	Navigation receiver assembly

*1: for 9 Speakers
*2: w/ Manual (SOS) Switch

General Audio Function

Symptom	Suspected Area	See page
Pressing power switch does not turn on system	Proceed to "Navigation Receiver Assembly Power Source Circuit"
Pressing power switch does not turn on system	Navigation receiver assembly
No sound can be heard from speakers	Proceed to "No Sound can be Heard from Speakers"
	Proceed to "Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"*1
	Proceed to "Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver"*2
	Proceed to "Speaker circuit"
	Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"*1
	Proceed to "Stereo Component Amplifier Power Source Circuit"*1
	DCM (Telematics transceiver)*2
	Stereo component amplifier assembly*1
	Navigation receiver assembly
Abnormal noise occurs	Proceed to "Noise Occurs"
	Stereo component amplifier assembly*1
	Navigation receiver assembly
	DCM (Telematics transceiver)*2
Sound quality is bad in all modes (Volume is too low)	Check that the ASL function is off	-
	Proceed to "Poor Sound Quality in All Modes (Low Volume)"
	Proceed to "Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"*1
	Proceed to "Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver"*2
	Proceed to "Speaker circuit"
	Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier"*1
	DCM (Telematics transceiver)*2
	Stereo component amplifier assembly*1
	Navigation receiver assembly
ASL does not function	Check that the ASL function is on	-
	Proceed to "Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter"*1
	Stereo component amplifier assembly*1
	Navigation receiver assembly

*1: for 9 Speakers
*2: w/ Manual (SOS) Switch

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"
Radio broadcast can be received but radio station cannot be displayed (Some radio stations do not provide their name information)	Navigation receiver assembly
Radio broadcast can be displayed but radio broadcast cannot be heard from speakers	Check the volume settings	-
	Navigation receiver assembly
Radio broadcast can be received but station list cannot be displayed	Wait for 120 seconds in radio mode, and select the "Refresh" switch on the station list screen	-
	Navigation receiver assembly
Radio broadcast can be received but station list cannot be updated	Select the "Refresh" switch on the station list screen	-
	Wait for 10 minutes with the engine switch on (ACC), and select the "Refresh" switch on the station list screen again	-
	Navigation receiver assembly
After the voice recognition function or hands-free function is turned off, the cache radio does not operate	Check that the cache radio setting is on	-
	Navigation receiver assembly
When the cache radio is playing, sound is interrupted, sound cannot be heard or sound quality is poor	Check if similar symptoms occur when receiving conventional FM/AM radio broadcasts	-
	Check if similar symptoms occur when receiving other broadcasts	-
	Move the vehicle to a place where the reception sensitivity is good and check again	-
	Navigation receiver assembly
When the cache radio is playing, sound can be heard, but no information is displayed (some radio stations do not provide their name information)	Check if similar symptoms occur when receiving other broadcasts	-
	Move the vehicle to a place where the reception sensitivity is good and check again	-
	Navigation receiver assembly

HD Radio Function (w/ HD Radio Function)

Symptom	Suspected Area	See page
Only "HD Radio" stations cannot be heard or selected, or their analog or digital sound cannot be changed	Check the "HD Radio" settings	-
	Navigation receiver assembly
"iPod" tagging function cannot be used	Check if a message indicating that the capacity for tag information is full is displayed	-
	Check that the cache radio is not playing (when the cache radio is playing, "iPod" tagging function cannot be used)	-
	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
When the HD radio is playing, cover art may not be displayed	When a song unregistered to the Gracenote CDDB is playing or cover art information is not provided by the broadcast station, its cover art cannot be displayed	-
When the HD radio is playing, cover art cannot be displayed	Navigation receiver assembly
Broadcast station logo cannot be displayed	Check if similar symptoms occur when receiving other broadcasts	-
	Check if similar symptoms occur with another vehicle	-
	Navigation receiver assembly
SPS channel cannot be selected	Check that HD radio FM mode is selected	-
	After pressing the "Refresh" switch, check that the SPS channel is on the station list	-
	Navigation receiver assembly
When the SPS channel is selected, sound cannot be heard	After pressing the "Refresh" switch, select the SPS channel on the station list	-
When the SPS channel is selected, sound cannot be heard	Navigation receiver assembly

SDARS System Function (w/ SDARS System)

Symptom	Suspected Area	See page
Satellite radio broadcast cannot be received or reception is bad	Proceed to "Satellite Radio Broadcast cannot be Received"
	Stereo component tuner assembly
	Navigation receiver assembly
Satellite radio cannot receive pay-type broadcasts	Proceed to "Satellite Radio Broadcast cannot be Received"
	Stereo component tuner assembly
	Navigation receiver assembly
Satellite radio broadcast cannot be selected or after selecting broadcast, broadcast cannot be added into memory	Proceed to "Satellite Radio Broadcast cannot be Received"
	Proceed to "Satellite Radio Broadcast cannot be Selected or After Selecting Broadcast, Broadcast cannot be Added into Memory"
	Stereo component tuner assembly
	Navigation receiver assembly
Satellite radio can be displayed but radio broadcast cannot be heard from speakers	Check the volume settings	-
	Proceed to "Satellite Radio Broadcast cannot be Received"
	Stereo component tuner assembly
	Navigation receiver assembly
Broadcast station logo cannot be displayed	Proceed to "Satellite Radio Broadcast cannot be Received"
	Proceed to "Data Signal Circuit between Navigation Receiver Assembly and Extension Module"
	Stereo component tuner assembly
	Navigation receiver assembly
Satellite radio text information cannot be displayed	Proceed to "Satellite Radio Broadcast cannot be Received"
	Stereo component tuner assembly
	Navigation receiver assembly
Satellite radio broadcast station cannot be selected (scan cannot be performed)	Proceed to "Satellite Radio Broadcast cannot be Received"
	Stereo component tuner assembly
	Proceed to "Satellite Radio Broadcast cannot be Received"
When the satellite radio is playing, some cover art may not be displayed	When a song unregistered to the Gracenote CDDB is playing, its cover art cannot be displayed	-
When the satellite radio is playing, cover art cannot be displayed	Navigation receiver assembly

CD Player Function

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
	Navigation 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
Disc cannot be ejected	Proceed to "Disc cannot be Ejected"
Disc sound skips	Proceed to "Check Optical Disc Error History" in Operation Check
Disc sound skips	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)"
Album cover art cannot be displayed	Check that Display Cover Art on the disc settings screen is set to on	-
	Check if similar symptoms occur with another vehicle	-
	If an indication to update the Gracenote database appears on the album cover art screen and update data has been downloaded to the navigation receiver assembly, update the Gracenote database to the latest version	-
	Navigation receiver assembly

AUX (Stereo Jack) 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 Navigation Receiver Assembly and Stereo Jack Adapter"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
"AUX/VTR" is not displayed on system check mode screen	Proceed to "Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly

Voice Recognition Function

Symptom	Suspected Area	See page
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"
	Navigation receiver assembly
When voice recognition switch is pressed, a short beep is emitted but voice cannot be recognized properly	Proceed to "Voice is not Recognized"
	Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly"
	SD card	-
	Navigation receiver assembly

"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"
	Navigation receiver assembly
"Bluetooth" compatible cellular phone cannot be registered	Proceed to "Cellular Phone Registration Failure"
"Bluetooth" compatible cellular phone cannot be connected	Check that no other cellular phone is connected as a hands-free device	-
	Bring the cellular phone near the in-vehicle device and reconnect it	-
	Proceed to "Cellular Phone Inspection"
	Navigation receiver assembly
"Bluetooth" compatible cellular phone connection is disconnected	Bring the cellular phone near the in-vehicle device and check if it is reconnected	-
	Proceed to "Cellular Phone Inspection"
	Navigation receiver assembly
"Bluetooth" compatible cellular phone cannot be connected automatically (can be connected manually)	Check that "Bluetooth" automatic connection setting of the in-vehicle device is on	-
	Navigation receiver assembly
Message that prompts to check the cellular phone is displayed	Bring the cellular phone near the in-vehicle device and check if it is reconnected	-
	Proceed to "Cellular Phone Inspection"
	Navigation receiver assembly
When the 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 receiver assembly
Phonebook data is cleared	Navigation receiver assembly
Phonebook data cannot be edited	Check that the phonebook data automatic transfer setting is off	-
Phonebook data cannot be edited	Navigation receiver assembly
All the transferred phonebook data is sorted to "Other"	Check that no applications on the cellular phone are operating	-
	Check that phonebook data in the cellular phone is not stored to the SIM card	-
	Proceed to "Cellular Phone Inspection"
	Explain to the customer that all the transferred phonebook data may be stored to "Other" depending on cellular phone	-
Cellular phone cannot make outgoing/incoming calls	Move the vehicle into a cellular phone service area, check that the "Bluetooth" device is connected to the vehicle and operate device again	-
	Check that the cellular phone can make outgoing/incoming calls properly when not connected via "Bluetooth"	-
	Proceed to "Cellular Phone Inspection"
	Navigation receiver assembly
Other caller's voice is interrupted by noise or sound quality is poor	Check the receiving voice volume (if it is too high, voice may sound distorted)	-
	Make a call with the cellular phone disconnected from "Bluetooth" and check that other caller's voice can be heard clearly	-
	Proceed to "Check Hands-free Voice Quality Setting" in Operation Check
	Proceed to "Cellular Phone Inspection"
	Navigation receiver assembly
Other caller's voice cannot be heard	Check that reception voice volume is not set to minimum	-
	Make a call with the cellular phone disconnected from "Bluetooth" and check that other caller's voice can be heard clearly	-
	Proceed to "Check Hands-free Voice Quality Setting" in Operation Check
	Proceed to "Cellular Phone Inspection"
	Navigation receiver assembly
Caller's voice (your voice) is interrupted by noise or sound quality is poor	Check the transmitting voice volume (if it is too high, voice may sound distorted)	-
	Check that nothing can cause noise around the microphone (an outlet of the air conditioning system facing the microphone, wind from an open window, additional devices, etc. may affect noise occurrence)	-
	Proceed to "Check Hands-free Voice Quality Setting" in Operation Check
	Proceed to "Cellular Phone Inspection"
	Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly"
Other caller cannot hear your voice	When talking on the cellular phone, check that the mute button is not pressed	-
	Check that nothing can cause noise around the microphone (an outlet of the air conditioning system facing the microphone, wind from an open window, additional devices, etc. may affect noise occurrence)	-
	Proceed to "Check Hands-free Voice Quality Setting" in Operation Check
	Proceed to "Cellular Phone Inspection"
	Proceed to "Microphone Circuit between Microphone and Navigation Receiver Assembly"
No notification when a new SMS/MMS/e-mail has been received	Check the SMS/MMS/e-mail notification settings on the cellular phone and the navigation receiver assembly	-
	Proceed to "Cellular Phone Inspection"
	Navigation receiver assembly
SMS/MMS/e-mail cannot be replied to	Move the vehicle into a cellular phone service area, and check the operation of the navigation receiver assembly and cellular phone	-
	Check that the cellular phone can send an SMS/MMS/e-mail	-
	Proceed to "Cellular Phone Inspection"
	Navigation receiver assembly
Received SMS/MMS/e-mail cannot be read	Check the SMS/MMS/e-mail transfer settings on the cellular phone and the navigation receiver assembly	-
	Proceed to "Cellular Phone Inspection"
	Navigation receiver assembly

"Bluetooth" Audio Function

Symptom	Suspected Area	See page
Portable player cannot be registered	Proceed to "Portable Player cannot be Registered"
Portable player cannot be registered	Navigation receiver assembly
Portable player cannot be connected manually/automatically	Proceed to "Portable Player cannot be Registered"
	Proceed to "Portable Player cannot be Connected Manually/Automatically"
	Navigation receiver assembly
Cellular phone with portable audio function cannot be recognized as "Bluetooth" audio device even when connected using "Bluetooth"	Proceed to "Portable Player cannot be Registered"
	Proceed to "Portable Player cannot be Connected Manually/Automatically"
	Navigation receiver assembly
Sound of portable player cannot be heard from speakers, or sound is low	Proceed to "Sound of Portable Player cannot be Heard from Speakers or Sound is Low"
	Navigation receiver assembly
Portable player does not play even after "Bluetooth" audio mode is selected	Proceed to "Does not Play even after Bluetooth Audio Mode is Selected"
	Navigation receiver assembly
Portable player does not play	Proceed to "Does not Play even after Bluetooth Audio Mode is Selected"
Portable player does not play	Navigation receiver assembly
Track information such as track number, track name, elapsed play time and playlist is not displayed	Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"
	Navigation receiver assembly
Operation switches for portable player such as play, pause, repeat, random and scan are not displayed	Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"
	Navigation receiver assembly
Battery condition of portable player is not displayed	Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"
Battery condition of portable player is not displayed	Navigation receiver assembly
"Bluetooth" signal condition is not displayed	Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"
"Bluetooth" signal condition is not displayed	Navigation 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 receiver assembly
Noise occurs or sound skips when portable player plays	Proceed to "Noise Occurs or Sound Skips when Portable Player Plays"
Noise occurs or sound skips when portable player plays	Navigation receiver assembly
Registered device cannot be deleted	Proceed to "Registered Device cannot be Deleted"
Registered device cannot be deleted	Navigation receiver assembly

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 Navigation Receiver and Stereo Jack Adapter"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
USB device or "iPod" is not recognized	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
Track information such as track, artist and album names are not displayed	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
USB device or "iPod" is recognized but cannot play nor play in a sorted order	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
Album cover art cannot be displayed	Check that Display Cover Art on the "iPod" Settings screen is set to on	-
	Check if similar symptoms occur with another vehicle	-
	If an indication to update the Gracenote database appears on the album cover art screen and update data has been downloaded to the Navigation receiver assembly, update the Gracenote database to the latest version	-
	Navigation receiver assembly	-
User set album cover art cannot be displayed	Check if the priority display of Gracenote database album cover art setting is off	-
	Check that a JPEG file is used for the album cover art registered to the music data in the USB device or "iPod" - Navigation receiver assembly	-
	Navigation receiver assembly
"iPod" battery cannot be charged	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly
Screen is distorted or not displayed only when using the video function of an "iPod"	Check if "iPod" is set to output images	-
	Check if appropriate image signal setting (NTSC/PAL) is selected	-
	Check if video sound input is set to "A/V"	-
	Connect using a known good cable and check if the image is output	-
	Proceed to "Data Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter"
	No. 1 stereo jack adapter assembly
	Navigation receiver assembly

Entune Function (w/ Entune Function)

Symptom	Suspected Area	See page
An Entune system error message is displayed on the screen	Follow on screen instructions	-
	Proceed to "Confirm Cellular Phone Functionality"
	Proceed to "Confirm Vehicle Headunit Functionality"
	Proceed to "Entune Reset Procedure" in Operation Check
	Navigation receiver assembly
Entune apps and services are not operating as expected	Proceed to "Confirm Cellular Phone Functionality"
	Proceed to "Confirm Vehicle Headunit Functionality"
	Proceed to "Entune Reset Procedure" in Operation Check
	Navigation receiver assembly
Entune voice recognition is not possible (Voice recognition on the navigation system is normal)	Proceed to "Confirm Cellular Phone Functionality"
	Proceed to "Confirm Vehicle Headunit Functionality"
	Proceed to "Entune Reset Procedure" in Operation Check
	Navigation receiver assembly
Poor sound quality of Entune system	Confirm that cellular phone handset volume is turned up	-
	Confirm that adequate signal is maintained during driving	-
	Proceed to "Confirm Cellular Phone Functionality"
	Proceed to "Confirm Vehicle Headunit Functionality"
	Proceed to "Entune Reset Procedure" in Operation Check
	Navigation receiver assembly

Operation Check

OPERATION CHECK 1. CHECK NAVIGATION SYSTEM NORMAL CONDITION (a) If the symptom is applicable to any of the following, it is intended behavior, and not a malfunction. Symptom ...

Terminals Of Ecu

TERMINALS OF ECU 1. NAVIGATION RECEIVER ASSEMBLY (for 9 Speakers) Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified ...

Other materials about Toyota 4Runner:

Weight limits
• The gross trailer weight must never exceed the TWR described in the table. • The gross combination weight must never exceed the GCWR described in the table. • The gross vehicle weight must never exceed the GVWR indicated on the Certification ...

System Description
SYSTEM DESCRIPTION 1. GENERAL (a) When the ultrasonic sensors detect any obstacles at the corners and rear of the vehicle, the system informs the driver of the distance between the sensors and the obstacles by sounding a buzzer. 2. FUNCTION OF COMPONENT ...