RM38T0EC _56 Audio / Visual / Telematics _111966 AUDIO / VIDEO _0589552 AUDIO AND VISUAL SYSTEM(Production Date from 2023/04) T

AUDIO / VIDEO  AUDIO AND VISUAL SYSTEM(Production Date from 2023/04)  PROBLEM SYMPTOMS TABLE  


General Function
Symptom Suspected Area Link
Each time the ignition switch is turned to ON, the loading window is displayed. Inspect the auxiliary battery. -
Inspect the wire harness and connector (terminals +B1 and ACC1 of the radio and display receiver assembly). Click here
Replace the radio and display receiver assembly. Click here
A message is displayed to inform the driver that the program cannot be read, and the system cannot be operated. Replace the radio and display receiver assembly. Click here
Vehicle customization cannot be performed using the setting/editing display of the multi-display (customization is possible using the GTS). Turn the ignition switch from off to ACC, then try again. -
Replace the radio and display receiver assembly. Click here

Display Function
Symptom Suspected Area Link
No image is displayed when the ignition switch is ACC (black screen). If the screen is set to off, change the setting to on. -
Replace the radio and display receiver assembly. Click here
White or blue screen is displayed when the ignition switch is turned to ACC. Replace the radio and display receiver assembly. Click here
Color distortion occurs in all of the displays. Check the settings of the display quality adjustment screen (check that each setting is centered). -
Replace the radio and display receiver assembly. Click here
No air conditioning control screens are displayed. Check that the air conditioning system is operating correctly. -

Audio Function
Symptom Suspected Area Link
When ASL (Auto Sound Levelizer) is operating and audio is being output, the sound volume does not change even when driving on a highway, etc. Explain to the customer that if the sound volume is set to high, it is hard to notice the effect of ASL. -
Check the settings of the sound quality adjustment screen (check that the ASL function is not set to off). -
Check the settings of the sound quality adjustment screen (check that each setting is centered). -
Function Check/Setting I - check vehicle signal (SPD signal) Click here
Inspect the wire harness and connector (radio and display receiver assembly (SPD) - combination meter assembly (+S) terminal). -
Proceed to the troubleshooting procedure of the meter & gauge system (vehicle speed signal circuit) Click here
Replace the radio and display receiver assembly. Click here
In all modes, sound from all speakers cannot be heard, sound quality is poor or sound is interrupted in all modes Inspect the wire harness and connector (telematics transceiver (MUTE) - radio and display receiver assembly (TMUT) terminal). -
Inspect the telematics transceiver (MUTE) terminal. Click here
Replace the radio and display receiver assembly. Click here
Sound from a specific speaker cannot be heard, sound quality is poor or sound is interrupted in all modes Check the settings of the sound quality adjustment screen (check that each setting is centered). -
Check the settings of the sound quality adjustment screen (check that the ASL function on sound setting display 2 is set to off). -
Proceed to "Speaker Circuit" Click here
In all modes, noise occurs in all of the speakers. Proceed to "In all modes, noise occurs in all of the speakers" Click here

Night Illumination Function
Symptom Suspected Area Link
Even though headlights are turned on, the display is not dimmed. Check that the interior lighting system is operating correctly. -
Proceed to "Even Though Headlights are Turned On, Head-Unit does not Dim the Display" Click here
The night illumination function of the steering pad switch does not function (audio operation on the steering pad switch is normal). Inspect the steering pad switch assembly (IL+2, ILL) terminal. Click here
Inspect the spiral cable sub-assembly (IL+2) terminal. Click here
Inspect the wire harness and connector (spiral cable sub-assembly (IL+2) terminal). -

Switch Function
Symptom Suspected Area Link
Touch switch operation is not received. Check that there is no foreign matter caught, etc. in the switch for which the problem is occurring, and remove it if necessary. -
Function Check/Setting I - check touch switch Click here
Replace the radio and display receiver assembly. Click here
Panel switch operation is not received. Check that there is no foreign matter caught, etc. in the switch for which the problem is occurring, and remove it if necessary. -
Function Check/Setting I - check panel switch Click here
Replace the radio and display receiver assembly. Click here
Audio system operation using the steering wheel switches does not function (sound output is normal and the operation of the panel switch is correct). Check that there is no foreign matter caught, etc. in the switch for which the problem is occurring, and remove it if necessary. -
Inspect the steering pad switch assembly (AU1, AU2, EAU) terminal. Click here
Inspect the spiral cable sub-assembly (AU1, AU2, EAU) terminal. Click here
Inspect the wire harness and connector (spiral cable sub-assembly - radio and display receiver assembly terminal). -
Inspect the radio and display receiver assembly (SWG) terminal. Click here
Replace the radio and display receiver assembly. Click here

Radio Function
Symptom Suspected Area Link
Noise occurs only for radio Proceed to "Noise occurs only for radio" Click here
Radio wave reception failure (poor radio wave reception) Proceed to "Radio wave reception failure (poor radio wave reception)" Click here
Radio can be received, but broadcasting station name is not displayed When the broadcasting station name has not been recorded such as when the broadcasting station is newly established, etc., it will not be displayed -
When the radio wave reception is poor, it may not be displayed -
Replace the radio and display receiver assembly. Click here

Wi-Fi Function
Symptom Suspected Area Link
Cannot Establish Wi-Fi Connection Proceed to "Wi-Fi Connection History" Click here

USB Function
Symptom Suspected Area Link
Sound cannot be heard or sound quality is poor only when playing a USB storage device. Proceed to "Sound cannot be Heard Sound Quality is Poor only when Replaying USB Storage Device" Click here
USB storage device cannot be detected or played. Proceed to "USB Audio System Recognition/Play Error" Click here
Track information such as track number, track name, elapsed time and playlist is not displayed. Proceed to "USB Audio System Recognition/Play Error" Click here
Although a USB storage device can be detected, the track cannot be played or cannot be played in the sorted order. Proceed to "USB Audio System Recognition/Play Error" Click here
USB storage device cannot be charged. Proceed to "USB Audio System Recognition/Play Error" Click here
Screen is distorted or not displayed only when using the USB storage device. Check using other media or check the media with which the malfunction occurs using another vehicle of the same type. -
Replace the No. 1 stereo jack adapter assembly. Click here
Replace the radio and display receiver assembly. Click here
The display color distortion occurs only when playing a USB storage device (normal for other types). Check the settings of the display quality adjustment screen (check that each setting is centered). -
Check the device with which the malfunction occurs using another vehicle of the same type. -
Replace the radio and display receiver assembly. Click here
"IF-BOX_USB" not displayed on the system check mode screen. Proceed to "USB Audio System Recognition/Play Error" Click here

Vehicle Information
Symptom Suspected Area Link
Energy flow and battery level are not displayed on the "Energy Monitor" screen.*1 Turn the ignition switch to ON (IG), and check again. -
Check that the hybrid control system is operating normally. -
Replace the radio and display receiver assembly. Click here
The trip information is not displayed or updated. Turn the ignition switch to ON (IG), and check again. -
Check that the hybrid control system is operating correctly.*1 -
Check that the SFI system is operating correctly.*2 -
Check that the electronically controlled brake system is operating correctly. -
Replace the radio and display receiver assembly. Click here
The drivable distance is not displayed on the trip information display. Turn the ignition switch to ON (IG), and check again. -
Replace the radio and display receiver assembly. Click here
The fuel consumption history information is not displayed or updated. Turn the ignition switch to ON (IG), and check again. -
Check that the meter and gauge system is operating correctly. -
Replace the radio and display receiver assembly. Click here

*1: for HEV Model

*2: for Gasoline Model


My Setting Function
Symptom Suspected Area Link
My settings on the multi-display cannot be used Proceed to My Settings cannot be Used on the Multi-display Click here

Voice Recognition Function
Symptom Suspected Area Link
When the voice recognition switch is pressed, a short beep is not output and the voice recognition system does not start Check that there is no foreign matter caught, etc. in the switch for which the problem is occurring, and remove it if necessary -
Inspect the steering pad switch assembly. Click here
Inspect the spiral cable sub-assembly. Click here
Inspect the wire harness and connector (spiral cable sub-assembly - radio and display receiver assembly terminal). -
Replace the radio and display receiver assembly. Click here
Voice recognition does not start even though wake word is spoken. Check that the wake word in the settings of the in-vehicle device is not set to off. -
Check that the wake word spoken by the user matches that in the settings of the in-vehicle device. -
If a custom wake word has been set in the settings of the in-vehicle device, try to set and check another wake word. (If wording is too long or too short, it may not be recognized.) -
Proceed to "When voice recognition switch is pressed, a short beep is not emitted and the voice recognition system does not start." Click here
Proceed to "Microphone Circuit" Click here
The voice recognition system starts but voice cannot be recognized properly. Check that the telematics system is operating correctly. -
Check that the microphone sound holes of the telephone microphone assembly are not blocked -
Confirm the installation condition of the telephone microphone assembly -
Proceed to "When voice recognition switch is pressed, a short beep is not emitted and the voice recognition system does not start." Click here
Proceed to "Microphone Circuit" 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
Replace the radio and display receiver assembly. Click here
"Bluetooth" compatible cellular phone cannot be registered Proceed to "Cellular Phone Registration Failure" Click here
Proceed to ""Bluetooth" Connection History" Click here
"Bluetooth" compatible cellular phone cannot be registered Check that another cellular phone is not already 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
Proceed to "'Bluetooth' Connection History" Click here
Replace the radio and display receiver assembly. Click here
"Bluetooth" compatible cellular phone cannot be connected automatically (can be connected manually) Check that the setting "Use for Phone" is set to on on the in-vehicle device registration screen -
Replace the radio and display receiver assembly. Click here
2 "Bluetooth" compatible cellular phones cannot connect at the same time Check that the sign-in completes after opening the My Settings (user profile) screen -
Check that another cellular phone is not already connected as a hands-free device -
Move the main cellular phone and sub-cellular phone close to the in-vehicle device and connect again -
Proceed to "Cellular Phone Inspection" Click here
Proceed to "'Bluetooth' Connection History" Click here
Replace the radio and display receiver assembly. Click here
Ringtone of a "Bluetooth" compatible cellular phone cannot be heard Check that mute of the cellular phone is off -
Adjust the sound volume of the cellular phone, and try again -
Proceed to "Cellular Phone Inspection" Click here
Replace the 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
Proceed to "'Bluetooth' Connection History" Click here
Replace the radio and display receiver assembly. Click here
Bring the cellular phone near the in-vehicle device and check if it is reconnected Check that the sign-in completes after opening the My Settings (user profile) screen -
Proceed to "Cellular Phone Registration Failure" Click here
Message that prompts to check the cellular phone is displayed Bring the cellular phone near the in-vehicle device and reconnect it -
Proceed to "Cellular Phone Inspection" Click here
Replace the radio and display receiver assembly. Click here
Phonebook data cannot be transferred Check that the sync contact 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 application on a cellular phone is operating -
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
Replace the radio and display receiver assembly. Click here
Phonebook data is cleared Check that the phonebook data automatic transfer has been completed -
Replace the radio and display receiver assembly. Click here
Phonebook data cannot be edited Check if the in-vehicle device phonebook data automatic transfer setting is set to "OFF" -
Replace the radio and display receiver assembly. Click here
All the transferred phonebook data is sorted to "Other" Check that no application on a cellular phone is operating -
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 cellular phone -
Cellular phone cannot make outgoing/incoming calls Move the vehicle into a cellular phone service area, check that the cellular phone is connected to the vehicle via "Bluetooth" and operate the in-vehicle device again -
Check that the cellular phone can make outgoing/incoming calls properly when not connected via "Bluetooth" -
Check if a call confirmation message is displayed when attempting to call -
Proceed to "Cellular Phone Inspection" Click here
Proceed to "'Bluetooth' Connection History" Click here
Replace the 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 callers voice can be heard clearly -
Check that audio is correctly output for the radio -
Replace the radio and display receiver assembly. Click here
Other caller's voice cannot be heard Check that audio is correctly output for the radio -
Make a call with the cellular phone disconnected from "Bluetooth" and check that other callers voice can be heard clearly -
Using the cellular phone setting display, confirm that the audio output device is registered to the in-vehicle device. -
Check that reception voice volume is not set to minimum. -
Replace the 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). -
If any additional devices are installed, turn on/off the power switch and check whether noise occurs. -
Turn the ignition switch from ACC to off for a few times at a certain interval and check the sound volume of the calls. -
Using another cellular phone with another cellular phone carrier, check the sound volume of the calls a few times at a certain interval. -
Proceed to "When voice recognition switch is pressed, a short beep is not emitted and the voice recognition system does not start." Click here
Proceed to "Microphone Circuit" Click here
Other caller cannot hear your voice When talking on the cellular phone, check that the mute button is not pressed. -
Proceed to "When voice recognition switch is pressed, a short beep is not emitted and the voice recognition system does not start." Click here
Proceed to "Microphone Circuit" Click here
Sound output too low (other caller cannot hear your voice at an appropriate volume level) Turn the ignition switch from ACC to off a few times at a certain interval and check the sound volume of the calls. -
Using another cellular phone with another cellular phone carrier, check the sound volume of the calls a few times at a certain interval. -
Proceed to "When voice recognition switch is pressed, a short beep is not emitted and the voice recognition system does not start." Click here
Proceed to "Microphone Circuit" Click here
The telephone button on the steering pad switch cannot be operated but the displayed telephone button can be operated. Check that there is no foreign matter caught, etc. in the switch for which the problem is occurring, and remove it if necessary -
Check that the voice recognition switch on the steering pad switch can be operated. If it cannot be operated, proceed to "When voice recognition switch is pressed, a short beep is not emitted and the voice recognition system does not start" -
Inspect the steering pad switch assembly. Click here

"Bluetooth" Audio Function
Symptom Suspected Area Link
"Bluetooth" portable audio player cannot be detected "Bluetooth" Check if the portable audio player is not connected to the in-vehicle device via "Apple CarPlay", "CarLife" or "HiCar". -
Confirm that the portable audio player is "Bluetooth" compatible. -
Check that the portable audio player is being connected to the in-vehicle device via "Bluetooth" using the correct procedure. -
Check the portable audio player that the malfunction occurred for using another vehicle of the same type. -
Check after removing all additional devices which use radio waves. -
Replace the radio and display receiver assembly. Click here
Portable audio player cannot be connected manually/automatically. Confirm that the portable audio player is "Bluetooth" compatible. -
Check that the portable audio player is being connected to the in-vehicle device via "Bluetooth" using the correct procedure. -
Check that the "Bluetooth" audio connection setting of the "Bluetooth" portable audio player is set to on. -
Select the customers portable audio player on the device registration screen of the in-vehicle device and check that the "Use for Media" setting is set to on -
Check that the portable audio player is not in standby/sleep mode. -
Check that the portable audio player is not being connected to another device via "Bluetooth". -
Check the portable audio player that the malfunction occurred for using another vehicle of the same type. -
Confirm after removing all additional devices which use radio waves. -
Replace the radio and display receiver assembly. Click here
Cellular phone with portable audio player function is connected via "Bluetooth" but cannot be detected as a "Bluetooth" compatible device. "Bluetooth" Check if the portable audio player is not connected to the in-vehicle device via "Apple CarPlay", "CarLife" or "HiCar". -
Confirm that the cellular phone with portable audio player function is "Bluetooth" compatible. -
Check that the cellular phone with portable audio player function is being connected to the in-vehicle device via "Bluetooth" using the correct procedure -
Check the cellular phone with portable audio player function using another vehicle of the same type. -
Confirm after removing all additional devices which use radio waves. -
Replace the radio and display receiver assembly. Click here
Portable audio player automatically starts. Check that the cellular phone with portable audio player function is being connected to the in-vehicle device via "Bluetooth" using the correct procedure. -
Check that "Use for media" is set to off on the in-vehicle device -
Check the cellular phone with portable audio player function using another vehicle of the same type. -
Sound from portable audio player cannot be heard, sound is low or sound quality is poor Place the portable audio player to an appropriate position. -
Check that the portable audio player is on and that the sound volume is not set to zero and mute is off -
Confirm that use of Wi-Fi connection is set to off. If Bluetooth and Wi-Fi devices are connected at the same time, depending on the specification of each device, one of them will be prioritized to output its audio. -
Check the portable audio player using another vehicle of the same type. -
Replace the radio and display receiver assembly. Click here
Sound from portable audio player is interrupted or noise occurs Put the portable audio player in an appropriate location. -
Confirm that Wi-Fi is set to off. If Bluetooth and Wi-Fi devices operate at the same time, the connection may be disconnected due to wave interference (the 2.4 GHz frequency band will be congested, etc.)). -
Check the portable audio player using another vehicle of the same type. -
Confirm after removing all additional devices which use radio waves. -
Replace the radio and display receiver assembly. Click here
Portable player does not play even after "Bluetooth" audio mode is selected. Check that the portable audio player is operating correctly. -
Check the portable audio player using another vehicle of the same type. -
Replace the radio and display receiver assembly. Click here
Track information such as track number, track name, elapsed play time and playlist is not displayed or the displayed contents is not correct. Confirm that the cellular phone with portable audio player function is "Bluetooth" compatible. -
Check that the track information is displayed on the portable audio player. -
Check the portable audio player using another vehicle of the same type. -
Replace the radio and display receiver assembly. Click here
Operation switches for portable player such as play, pause, repeat are not displayed. Check the portable audio player using another vehicle of the same type. -
Replace the radio and display receiver assembly. Click here
Portable player cannot pause, skip, fast forward, fast rewind, play at random, repeat Check the portable audio player using another vehicle of the same type. -
Replace the radio and display receiver assembly. Click here
Registered device cannot be deleted. Check that the portable audio player is being cleared from the in-vehicle device using the correct procedure. -
Replace the radio and display receiver assembly. Click here
Track information is not listed or the displayed contents are not correct. Check the portable audio player using another vehicle of the same type. -
Replace the radio and display receiver assembly. Click here
Repeat cannot be set to off Check the portable audio player using another vehicle of the same type. -
Replace the radio and display receiver assembly. Click here

Apple CarPlay Function
Symptom Suspected Area Link
Apple CarPlay cannot be started by USB connection Check that the customers device is compatible with Apple CarPlay -
If a USB hub is being used, remove it -
Check the USB cable connection status and check that a genuine Apple USB cable or MFi certified USB cable is being used -
Check that the customers "Siri" function can be used on their device -
Select the customers device on the in-vehicle device registration screen and check that the "Use for Apple CarPlay" setting is set to on -
Proceed to "Sound cannot be Heard Sound Quality is Poor only when Replaying USB Storage Device" Click here
Apple CarPlay cannot be started by wireless connection Move the vehicle to a place where there are minimal radio waves and Wi-Fi connection is possible, then check again -
Access the official site (https://www.apple.com/) and search for "Apple CarPlay" in the search bar. Select iOS compatibility function and check that the customers device is listed -
Check that the version of the customers device is not earlier than iOS 13.3 -
Check that the customers device is being connected to the in-vehicle device via "Bluetooth" using the correct procedure -
Check that the wireless connection setting of the customers device is set to on (permission) -
Check that the Apple CarPlay connection setting of the customers device is set to on (permission) -
Check that the "Bluetooth" connection setting of the customers device is set to on -
Check that the in-vehicle device is displayed on the "Bluetooth" registered device screen of the customers device -
Check that the Wi-Fi connection setting of the customers device is set to on -
Check that [SSID: "Smartphone_Connect_######"] (where "######" is the last 6 digits of the Wi-Fi MAC address) is displayed as the connection information for the customers device -
Check that the name of the customers device is displayed as a "Bluetooth" registered device on the in-vehicle device -
Select the customers device on the in-vehicle device registration screen and check that the "Use for Apple CarPlay" setting is set to on -
Select the customers device on the in-vehicle device registration screen and check that Apple CarPlay starts when the "CONNECT" button is pressed -
Restart the customers device and check again -
Check if a "Bluetooth" connection can be established using another device -
Check that another device that is capable of tethering is displayed in "available networks" and check that a Wi-Fi connection can be established -
Replace the radio and display receiver assembly. Click here
Wireless connection disconnects unexpectedly Move the vehicle to a place where there are minimal radio waves and Wi-Fi connection is possible, then check again. -
Restart the customers device and check again. -
Check if another tether able device is displayed in "available networks" and can connect to Wi-Fi. -
Replace the radio and display receiver assembly. Click here
When a wireless connection is established, Bluetooth Audio cannot be used at the same time Check that a wireless connection and a Bluetooth Audio connection are not being attempted on the same device -
Check that a connection can be established with another device and can be used at the same time -
Replace the radio and display receiver assembly. Click here
Voice guidance and navigation information is not displayed on the combination meter assembly Restart the customers device and check again. -
Check that a different device can connect. -
Select the customers device on the in vehicle device registration screen and check that the "Use for Apple CarPlay" setting is set to on. -
After clearing the registered device from the in-vehicle device, register the device again and check that it is displayed on the combination meter assembly -
Replace the radio and display receiver assembly. Click here
No audio when Apple CarPlay starts
(Customers device is sufficiently charged) 		Check that the audio function is operating correctly. -
Check that sound can be heard from the device. -
Check that the sound volume is not set to zero. -
Check that the mute setting is set to off -
Check if an Apple CarPlay connection can be established using another device. -
Replace the radio and display receiver assembly. Click here

CarLife Function
Symptom Suspected Area Link
CarLife cannot be started by USB connection Check that the customers device is compatible with CarLife -
Check the USB cable connection status and check that a certified USB cable is being used -
Check that CarLife is installed on the customers device -
Check the settings of the in-vehicle device -
Proceed to "Sound cannot be Heard Sound Quality is Poor only when Replaying USB Storage Device" Click here
CarLife cannot be started by wireless connection Move the vehicle to a place where there are minimal radio waves and Wi-Fi connection is possible, then check again -
Check that CarLife is installed on the customers device -
Access the official site (https:// carlife.baidu.com/carlife/) and check if the customers device is compatible -
Check that the tethering function setting of the customers device is set to on -
Check that the customers device is being connected to the in-vehicle device via Wi-Fi using the correct procedure -
Check that the Wi-Fi setting of the in-vehicle device is set to on -
Check that the customers device is connected via Wi-Fi using the Wi-Fi screen of the in-vehicle device -
Restart the customers device and check again -
Check that a different device can connect -
Replace the radio and display receiver assembly. Click here
Wireless connection disconnects unexpectedly Move the vehicle to a place where there are minimal radio waves and Wi-Fi connection is possible, then check again. -
Restart the customers device and check again. -
Make sure that CarLife is the latest version. -
Replace the radio and display receiver assembly. Click here
Call information and navigation information is not displayed on the combination meter assembly. Restart the customers device and check again. -
Check that a different device can connect. -
Select the customers device on the in-vehicle device registration screen and check that the "Use for Phone" setting is set to on. -
After clearing the registered device from the in-vehicle device, register the device again and check that it is displayed on the combination meter assembly. -
Replace the radio and display receiver assembly. Click here
Although CarLife can be started, the audio cannot be heard.(Customers device is sufficiently charged) Check that the audio function is operating correctly. -
Check that sound can be heard from the device. -
Check that the sound volume is set to zero. -
Check that the mute setting is set to off. -
Check if a CarLife connection can be established using another device. -
Replace the radio and display receiver assembly. Click here

HiCar Function
Symptom Suspected Area Link
HiCar cannot be started by USB connection Check that the customers device is compatible with HiCar -
Check the USB cable connection status and check that a certified USB cable is being used -
Check that HiCar is installed on the customers device -
Check the settings of the in-vehicle device -
Proceed to "Sound cannot be Heard Sound Quality is Poor only when Replaying USB Storage Device" Click here
HiCar cannot be started by wireless connection Move the vehicle to a place where there are minimal radio waves and Wi-Fi connection is possible, then check again -
Check that HiCar is installed on the customers device -
Access the official site (https://developer.huawei.com/consumer/cn/doc/development/HiCar-Guides/availablephones) and check if the customers device is compatible -
Check that the tethering function setting of the customers device is set to on -
Check that the customers device is being connected to the in-vehicle device via Wi-Fi using the correct procedure -
Check that the Wi-Fi setting of the in-vehicle device is set to on -
Check that the customers device is connected via Wi-Fi using the Wi-Fi screen of the in-vehicle device -
Restart the customers device and check again -
Check that a different device can connect -
Replace the radio and display receiver assembly. Click here
Wireless connection disconnects unexpectedly Move the vehicle to a place where there are minimal radio waves and Wi-Fi connection is possible, then check again. -
Restart the customers device and check again. -
Make sure that HiCar is the latest version. -
Replace the radio and display receiver assembly. Click here
Call information and navigation information is not displayed on the combination meter assembly. Restart the customers device and check again. -
Check that a different device can connect. -
After clearing the registered device from the in-vehicle device, register the device again and check that it is displayed on the combination meter assembly. -
Replace the radio and display receiver assembly. Click here
Although HiCar can be started, the audio cannot be heard. (Customers device is sufficiently charged) Check that the audio function is operating correctly. -
Check that sound can be heard from the device. -
Check that the sound volume is set to zero. -
Check that the mute setting is set to off. -
Check if a HiCar connection can be established using another device. -
Replace the radio and display receiver assembly. Click here

Home Appliance Link Function
Symptom Suspected Area Link
The home appliance link function cannot be used Proceed to the "PROBLEM SYMPTOMS TABLE" of the telematics system (Home Appliance Link Function) Click here