Tech Tips
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Pressing power switch does not turn on system | Proceed to "Pressing Power Switch does not Turn on System" | |
| Proceed to "Steering Pad Switch Circuit" | ||
| Radio receiver assembly | ||
| Panel switch does not function | Radio receiver assembly | |
| Radio receiver does not illuminate at night | Proceed to "Illumination Circuit" | |
| Radio receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| No sound can be heard from speakers (audio is mute) | Proceed to "Radio Receiver Power Source Circuit" | |
| Proceed to "No Sound can be Heard from Speakers" | ||
| Proceed to "Speaker Circuit" | ||
| Radio receiver assembly | ||
| Sound quality is bad in all modes (volume is too low) | Proceed to "Poor Sound Quality in All Modes (Low Volume)" | |
| Proceed to "Speaker Circuit" | ||
| Radio receiver assembly | ||
| ASL does not function | Proceed to "Speed Signal Circuit" | |
| Abnormal noise occurs | Proceed to "Noise Occurs" | |
| Radio receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Radio broadcast cannot be received or poor reception | Proceed to "Radio Broadcast cannot be Received (Bad Reception)" | |
| Radio broadcast can be received but radio station cannot be displayed (some radio stations do not provide their name information) | Radio receiver assembly | |
| Radio broadcast can be displayed but radio broadcast cannot be heard from speakers | Operate the volume switch and turn up the volume level | - |
| Radio receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| CD cannot be inserted/played or CD is ejected right after insertion | Proceed to "Radio Receiver Power Source Circuit" | |
| Proceed to "CD cannot be Inserted/ Played or CD is Ejected Right After Insertion" | ||
| CD cannot be played or player does not function with disc | Proceed to "CD (Compact Disc) PLAYER OUTLINE" in System Description and check if the CD is compatible with the CD player | |
| Radio receiver assembly | ||
| CD cannot be ejected | Proceed to "Radio Receiver Power Source Circuit" | |
| Proceed to "CD cannot be Ejected" | ||
| Sound quality is bad only when CD is played (volume is too low) | Proceed to "Sound Quality is Bad Only when CD is Played (Volume is Too Low)" | |
| CD sound skips | Proceed to "CD Sound Skips" |
| Symptom | Suspected Area | See page |
|---|---|---|
| External device sound cannot be heard or sound quality is bad (stereo jack is used) | Proceed to "Radio Receiver Power Source Circuit" | |
| Radio receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Audio system cannot be operated with steering pad switch | Proceed to "Steering Pad Switch Circuit" | |
| Radio receiver assembly | ||
| Steering pad switch cannot be illuminated at night | Proceed to "Illumination Circuit" | |
| Radio receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| "Bluetooth" is inoperative (In-vehicle device cannot be recognized by the cellular phone) | Proceed to "Cellular Phone Inspection" | |
| Radio 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 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 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 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 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 | Enter "0000" 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 | - | |
| Radio 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" | - | |
| 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 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 "The Other Caller's Voice cannot be Heard, is too Quiet, or Distorted" | ||
| Proceed to "Cellular Phone Inspection" | ||
| Radio 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 "The Other Caller's Voice cannot be Heard, is too Quiet, or Distorted" | ||
| Proceed to "Cellular Phone Inspection" | ||
| Radio 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 "Cellular Phone Inspection" | ||
| Proceed to "The Other Caller cannot Hear Your Voice, or Your Voice is too Quiet or Distorted" | ||
| Proceed to "Microphone Circuit between Microphone and Radio Receiver" | ||
| Radio 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 "The Other Caller cannot Hear Your Voice, or Your Voice is too Quiet or Distorted" | ||
| Proceed to "Cellular Phone Inspection" | ||
| Proceed to "Microphone Circuit between Microphone and Radio Receiver" | ||
| Radio receiver assembly | ||
| "Bluetooth" can be connected while driving | Proceed to "Speed Signal Circuit" | |
| Radio receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Portable player cannot be registered | Proceed to "Portable Player cannot be Registered" | |
| Radio 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 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 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 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 receiver assembly | ||
| Portable player does not play | Proceed to "Does not Play even after Bluetooth Audio Mode is Selected" | |
| Radio 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 receiver assembly | ||
| 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" | |
| Radio 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" | |
| Radio receiver assembly | ||
| 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" | |
| Radio receiver assembly | ||
| Noise occurs or sound skips when portable player plays | Proceed to "Noise Occurs or Sound Skips when Portable Player Plays" | |
| Radio receiver assembly | ||
| Registered device cannot be deleted | Proceed to "Registered Device cannot be Deleted" | |
| Radio receiver assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| USB audio system sound cannot be heard or sound quality is bad (USB connector is used) | Proceed to [USB device or "iPod"] in System Description | |
| Proceed to "Radio Receiver Power Source Circuit" | ||
| Radio receiver assembly | ||
| USB device or "iPod" is not recognized | Proceed to [USB device or "iPod"] in System Description | |
| Proceed to "Radio Receiver Power Source Circuit" | ||
| Radio receiver assembly | ||
| Track information, such as track, artist and album names, is not displayed | Proceed to [USB device or "iPod"] in System Description | |
| Proceed to "Radio Receiver Power Source Circuit" | ||
| Radio receiver assembly | ||
| USB device or "iPod" is recognized but cannot play, or can play but not in a sorted order | Proceed to [USB device or "iPod"] in System Description | |
| Proceed to "Radio Receiver Power Source Circuit" | ||
| Radio receiver assembly | ||
| "iPod" battery cannot be charged | Proceed to [USB device or "iPod"] in System Description | |
| Proceed to "Radio Receiver Power Source Circuit" | ||
| Radio receiver assembly |