Toyota Tacoma (2015-2018) Service Manual: Problem Symptoms Table

Toyota Tacoma (2015-2018) Service Manual / Audio / Video / Audio And Visual System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

After replacing the stereo component tuner assembly of vehicles subscribed to pay-type satellite radio broadcasts, XM radio ID registration is necessary (w/ SDARS System).

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 the screen)	Proceed to "Black Screen"
Black screen (No image appears on the screen)	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"
	Radio and display receiver assembly
Power does not turn off (Screen remains on)	Proceed to "Radio Receiver Power Source Circuit"
Power does not turn off (Screen remains on)	Radio and display receiver assembly
Screen is distorted	Proceed to "Radio Receiver Power Source Circuit"
Screen is distorted	Radio and display receiver assembly
Screen flicker or color distortion	Proceed to "Screen Flicker or Color Distortion"
	Proceed to "Radio Receiver Power Source 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
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	Radio and display 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"
	Radio and display receiver assembly
Panel switches do not function	Proceed to "Panel Switches do not Function"
	Proceed to "Radio Receiver Power Source Circuit"
	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"
	Radio and display receiver assembly

Steering Pad Switch Function (w/ Steering Pad Switch)

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

General Audio Function

Symptom	Suspected Area	See page
Pressing ignition switch does not turn on system	Proceed to "Radio Receiver Power Source Circuit"
Pressing ignition switch does not turn on system	Radio and display receiver assembly
No sound can be heard from speakers	Proceed to "No Sound can be Heard from Speakers"
	Proceed to "Speaker Circuit"
	Radio and display receiver assembly
Abnormal noise occurs	Proceed to "Noise Occurs"
Abnormal noise occurs	Radio and display receiver assembly
Sound quality is bad in all modes (Volume is too low)	Check that the ASL function is off	-
	Proceed to "Poor Sound Quality in All Modes (Low Volume)"
	Proceed to "Speaker Circuit"
	Radio and display receiver assembly
ASL does not function	Check that the ASL function is on	-
	Proceed to "Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter"
	Radio and display receiver assembly
Voice guidance does not function	Proceed to "Voice Guidance does not Function"
	Proceed to "Speaker Circuit"
	Radio and display receiver assembly

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)	Radio and display receiver assembly
Only "HD Radio" stations cannot be heard or selected, or their analog or digital sound cannot be changed	Check the "HD Radio" settings	-
	Radio and display receiver assembly
"iPod" tagging function cannot be used	Check if a message indicating that the capacity for tag information is full is displayed	-
	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Radio and display 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	-
	Radio and display receiver assembly
"iPod" tagging function cannot be used	Check if a message indicating that the capacity for tag information is full is displayed	-
	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Radio and display receiver assembly
When the HD radio is playing, cover art is not 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	Radio and display 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	-
	Radio and display 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	-
	Radio and display 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	Radio and display 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
	Radio and display receiver assembly
Satellite radio cannot receive pay-type broadcasts	Proceed to "Satellite Radio Broadcast cannot be Received"
	Stereo component tuner assembly
	Radio and display 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
	Radio and display 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
	Radio and display receiver assembly
Broadcast station logo cannot be displayed	Proceed to "Satellite Radio Broadcast cannot be Received"
	Proceed to "Data Signal Circuit between Radio Receiver and Extension Module"
	Stereo component tuner assembly
	Radio and display receiver assembly
Satellite radio text information cannot be displayed	Proceed to "Satellite Radio Broadcast cannot be Received"
	Stereo component tuner assembly
	Radio and display 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
	Radio and display receiver assembly
When the satellite radio is playing, some cover art is not 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	Radio and display receiver assembly

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
	Proceed to "Check Optical Disc Error History" in Operation Check
	Radio and display receiver assembly
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
CD cannot be ejected	Proceed to "CD cannot be Ejected"
CD sound skips	Proceed to "Check Optical Disc Error History" in Operation Check
CD sound skips	Proceed to "CD Sound Skips"
Sound quality is bad only when CD is played (volume is too low)	Change the sound setting on the adjustment screen	-
	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)"
When CD is playing, some cover art is not displayed*	When a song unregistered to the Gracenote CDDB is playing, its cover art cannot be displayed	-
When CD is playing, cover art cannot be displayed*	Radio and display receiver assembly
Album cover art cannot be displayed*	Check that display cover art on the CD 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

*: w/ Gracenote media database

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

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"
	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 Microphone and Radio Receiver"
	Radio and display receiver assembly
Mobile Assistant function does not work (w/ Mobile Assistant Function)	Check if the "Siri" voice recognition application can be used on the device	-
	Check if a hard reset of the device corrects the problem	-
	Proceed to "Steering Pad Switch Circuit"
	Proceed to "Voice is not Recognized"
	Proceed to "Microphone Circuit between Microphone and Radio Receiver
	Radio and display 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"
	Radio and display receiver assembly
"Bluetooth" compatible cellular phone cannot be registered	Proceed to "Cellular Phone Registration Failure"
"Bluetooth" compatible cellular phone cannot be connected	Check that no other cellular phone is connected as a hands-free device	-
	Bring the cellular phone near the in-vehicle device and reconnect it	-
	Proceed to "Cellular Phone Inspection"
	Radio and display receiver assembly
"Bluetooth" compatible cellular phone cannot be connected automatically (can be connected manually)	Check that "Bluetooth" automatic connection setting of the in-vehicle device is on	-
	Radio and display receiver assembly
"Bluetooth" compatible cellular phone connection is disconnected	Bring the cellular phone near the in-vehicle device and check if it is reconnected	-
	Proceed to "Cellular Phone Inspection"
	Radio and display receiver assembly
Message that prompts to check the cellular phone is displayed	Bring the cellular phone near the in-vehicle device and check if it is reconnected	-
	Proceed to "Cellular Phone Inspection"
	Radio and display receiver assembly
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	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"
	Radio and display receiver assembly
Phonebook data is cleared	Radio and display receiver assembly
Phonebook data cannot be edited	Check that the phonebook data automatic transfer setting of the in-vehicle device is off	-
Phonebook data cannot be edited	Radio and display receiver assembly
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"
	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"
	Radio and display receiver assembly
Other caller's voice is interrupted by noise or sound quality is poor	Check the receiving voice volume (if it is too high, voice may sound distorted)	-
	Make a call with the cellular phone disconnected from "Bluetooth" and check that other caller's voice can be heard clearly	-
	Proceed to "Check Hands-free Voice Quality Setting" in Operation Check
	Proceed to "Cellular Phone Inspection"
	Radio and display receiver assembly
Other caller's voice cannot be heard	Check that reception voice volume is not set to minimum	-
	Make a call with the cellular phone disconnected from "Bluetooth" and check that other caller's voice can be heard clearly	-
	Proceed to "Check Hands-free Voice Quality Setting" in Operation Check
	Proceed to "Cellular Phone Inspection"
	Radio and display receiver assembly
Caller's voice (your voice) is interrupted by noise or sound quality is poor	Check the transmitting voice volume (if it is too high, voice may sound distorted)	-
	Check that nothing can cause noise around the microphone (an outlet of the air conditioning system facing the microphone, wind from an open window, additional devices, etc. may affect noise occurrence)	-
	Proceed to "Check Hands-free Voice Quality Setting" in Operation Check
	Proceed to "Cellular Phone Inspection"
	Proceed to "Microphone Circuit between Microphone and Radio Receiver"
	Radio and display receiver assembly
Other caller cannot hear your voice	When talking on the cellular phone, check that the mute button is not pressed	-
	Check that nothing can cause noise around the microphone (an outlet of the air conditioning system facing the microphone, wind from an open window, additional devices, etc. may affect noise occurrence)	-
	Proceed to "Check Hands-free Voice Quality Setting" in Operation Check
	Proceed to "Cellular Phone Inspection"
	Proceed to "Microphone Circuit between Microphone and Radio Receiver"
	Radio and display receiver assembly
No notification when a new SMS/MMS/e-mail has been received*	Check the SMS/MMS/e-mail notification settings on the cellular phone and the radio and display receiver assembly	-
	Proceed to "Cellular Phone Inspection"
	Radio and display receiver assembly
Received SMS/MMS/e-mail cannot be read*	Check the SMS/MMS/e-mail transfer settings on the cellular phone and the radio and display receiver assembly	-
	Proceed to "Cellular Phone Inspection"
	Radio and display receiver assembly
SMS 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"
	Radio and display receiver assembly

*: w/ SMS/MMS/e-mail Function

"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	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"
	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"
	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"
	Radio and display receiver assembly
Portable player does not play even after "Bluetooth" audio mode is selected	Proceed to "Does not Play even after Bluetooth Audio Mode is Selected"
	Radio and display receiver assembly
Portable player does not play	Proceed to "Does not Play even after Bluetooth Audio Mode is Selected"
Portable player does not play	Radio and display receiver assembly
Track information such as track number, track name, elapsed play time and playlist is not displayed	Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"
	Radio and display receiver assembly
Operation switches for portable player such as play, pause, repeat, random and scan are not displayed	Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"
	Radio and display receiver assembly
Battery condition of portable player is not displayed	Proceed to "Portable Player cannot be Operated Using In-vehicle Device or Track Information is not Displayed on In-vehicle Device"
Battery condition of portable player is not displayed	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"
"Bluetooth" signal condition is not displayed	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"
	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"
Noise occurs or sound skips when portable player plays	Radio and display receiver assembly
Registered device cannot be deleted	Proceed to "Registered Device cannot be Deleted"
Registered device cannot be deleted	Radio and display 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 Radio Receiver and Stereo Jack Adapter"
	No. 1 stereo jack adapter assembly
	Radio and display receiver assembly
USB device or "iPod" is not recognized	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Radio and display 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
	Radio and display 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
	Radio and display receiver assembly
Album cover art cannot be displayed	Check that display cover art on the "iPod" settings screen is set to on	-
Album cover art cannot be displayed	Check that a JPEG file is used for the cover art	-
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"	-
User set album cover art cannot be displayed	Radio and display receiver assembly
"iPod" battery cannot be charged	Proceed to "USB Audio System Recognition/Play Error"
	No. 1 stereo jack adapter assembly
	Radio and display receiver assembly

Fuel Consumption Function

Symptom	Suspected Area	See page
Graph is not displayed on "Trip Information" screen	Recheck with the engine running	-
Graph is not displayed on "Trip Information" screen	Radio and display receiver assembly
Cruise range is not displayed on "Trip Information" screen	Turn the ignition switch to ON and recheck	-
Cruise range is not displayed on "Trip Information" screen	Radio and display receiver assembly
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
Graph is not displayed on "Past record" screen	Turn the ignition switch to ON and recheck	-
Graph is not displayed on "Past record" screen	Radio and display receiver assembly

Connected Navigation App Function (w/ Connected Navigation App Function)

Symptom	Suspected Area	See page
A Connected Navigation App function error message is displayed on the screen	Follow the on screen instructions	-
	Proceed to "Confirm Cellular Phone Functionality"
	Proceed to "Confirm Vehicle Headunit Functionality"
	Proceed to "Connected Navigation App Reset Procedure" in Operation Check
	Radio and display receiver assembly
Connected Navigation App Suite and service is not operating as expected	Proceed to "Confirm Cellular Phone Functionality"
	Proceed to "Confirm Vehicle Headunit Functionality"
	Proceed to "Connected Navigation App Reset Procedure" in Operation Check
	Radio and display receiver assembly
Connected Navigation App voice recognition is not possible (voice recognition of the audio and visual system is normal)	Proceed to "Confirm Cellular Phone Functionality"
	Proceed to "Confirm Vehicle Headunit Functionality"
	Proceed to "Connected Navigation App Reset Procedure" in Operation Check
	Radio and display receiver assembly
Poor sound quality of Connected Navigation App function	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 "Connected Navigation App Reset Procedure" in Operation Check
	Radio and display receiver assembly

Operation Check

OPERATION CHECK 1. CHECK PANEL & STEERING SWITCH HINT: The radio and display receiver assembly panel switches and steering switches are checked in the following procedure. Illus ...

Terminals Of Ecu

TERMINALS OF ECU 1. RADIO AND DISPLAY RECEIVER ASSEMBLY Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition ...

Other materials:

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Steering Angle Sensor Unusual Bank Angle Detected (C1440)
DESCRIPTION If the skid control ECU (master cylinder solenoid) determines that the vehicle is being driven at a steep bank angle, the skid control ECU (master cylinder solenoid) stores DTC C1440 while VSC operation is temporarily disabled. It is not a malfunction if the system and sensor circ ...

Combination Meter ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Combination Meter ECU Communication Stop Mode Either condition is met: Communication stop for "Combination Meter" is indicated on the "Communication Bus Ch ...