Problem Symptoms Table [12/2017 - 10/2020]
NOTE:
- After replacing the radio receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, registration of the XM radio ID is necessary (w/ SXM System).
- If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure using the Techstream.
Refer to DCM ACTIVATION [12/2017 - 10/2020]
- When replacing the radio receiver assembly, always replace it with a new one. If a radio receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio receiver assembly may not operate normally.
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 | Link |
|---|---|---|
| Screen does not change when Point of Interest is selected on Destination screen | Proceed to "Switch Operation of Remote Touch not Accepted" | Refer to Switch Operation of Remote Touch not Accepted [12/2017 - 10/2022] |
| Screen does not change when Destination Assist is selected on Destination screen | Proceed to "Switch Operation of Remote Touch not Accepted" | Refer to Switch Operation of Remote Touch not Accepted [12/2017 - 10/2022] |
DESTINATION FUNCTION
| Symptom | Suspected Area | Link |
|---|---|---|
| Cannot contact call center when Call Dest. Assist is selected on Destination Assist screen | Contact Telematics Service Provider to inquire about network status | - |
| Proceed to "UNABLE TO CONNECT TO CALL CENTER" | Refer to UNABLE TO CONNECT TO CALL CENTER [12/2017 - 10/2020] | |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | Refer to DCM Data Signal Circuit between Navigation ECU and DCM [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] | |
| DCM (Telematics Transceiver) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] | |
| Other caller's voice volume cannot be adjusted using the Destination Assist screen | Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] |
LEXUS APP SUITE FUNCTION (WHEN USING FLEET APPS)
| Symptom | Suspected Area | Link |
|---|---|---|
| LEXUS App Suite function error message is displayed on the screen | Follow on screen instructions | - |
| Proceed to "UNABLE TO CONNECT TO CALL CENTER" | Refer to UNABLE TO CONNECT TO CALL CENTER [12/2017 - 10/2020] | |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | Refer to DCM Data Signal Circuit between Navigation ECU and DCM [12/2017 - 10/2020] | |
| Proceed to "Confirm Vehicle Headunit Functionality" | Refer to Confirm Vehicle Headunit Functionality [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] | |
| LEXUS App Suite and services are not operating as expected | Proceed to "UNABLE TO CONNECT TO CALL CENTER" | Refer to UNABLE TO CONNECT TO CALL CENTER [12/2017 - 10/2020] |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | Refer to DCM Data Signal Circuit between Navigation ECU and DCM [12/2017 - 10/2020] | |
| Proceed to "Confirm Vehicle Headunit Functionality" | Refer to Confirm Vehicle Headunit Functionality [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] | |
| Poor sound quality of LEXUS App Suite function | Confirm that adequate signal is maintained during driving | - |
| Proceed to "UNABLE TO CONNECT TO CALL CENTER" | Refer to UNABLE TO CONNECT TO CALL CENTER [12/2017 - 10/2020] | |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | Refer to DCM Data Signal Circuit between Navigation ECU and DCM [12/2017 - 10/2020] | |
| Proceed to "Confirm Vehicle Headunit Functionality" | Refer to Confirm Vehicle Headunit Functionality [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] | |
| The LEXUS App Suite app (Fleet Apps) cannot be installed on the head unit | Proceed to "UNABLE TO CONNECT TO CALL CENTER" | Refer to UNABLE TO CONNECT TO CALL CENTER [12/2017 - 10/2020] |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | Refer to DCM Data Signal Circuit between Navigation ECU and DCM [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] | |
| The LEXUS App Suite app (Fleet Apps) cannot be updated | Proceed to "UNABLE TO CONNECT TO CALL CENTER" | Refer to UNABLE TO CONNECT TO CALL CENTER [12/2017 - 10/2020] |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | Refer to DCM Data Signal Circuit between Navigation ECU and DCM [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] |
LEXUS APP SUITE FUNCTION (WHEN USING INFOTAINMENT APPS)
| Symptom | Suspected Area | Link |
|---|---|---|
| LEXUS App Suite function error message is displayed on the screen | Follow on screen instructions | - |
| Proceed to "Confirm Cellular Phone Functionality" | Refer to Confirm Cellular Phone Functionality [12/2017 - 10/2020] | |
| Proceed to "Confirm Vehicle Headunit Functionality" | Refer to Confirm Vehicle Headunit Functionality [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] | |
| LEXUS App Suite and services are not operating as expected | Proceed to "Confirm Cellular Phone Functionality" | Refer to Confirm Cellular Phone Functionality [12/2017 - 10/2020] |
| Proceed to "Confirm Vehicle Headunit Functionality" | Refer to Confirm Vehicle Headunit Functionality [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] | |
| Poor sound quality of LEXUS App Suite function | Confirm that cellular phone handset volume is turned up | - |
| Confirm that adequate signal is maintained during driving | - | |
| Proceed to "Confirm Cellular Phone Functionality" | Refer to Confirm Cellular Phone Functionality [12/2017 - 10/2020] | |
| Proceed to "Confirm Vehicle Headunit Functionality" | Refer to Confirm Vehicle Headunit Functionality [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] | |
| The LEXUS App Suite app (Infotainment Apps) cannot be installed on the head unit | Proceed to "Confirm Cellular Phone Functionality" | Refer to Confirm Cellular Phone Functionality [12/2017 - 10/2020] |
| Proceed to "Confirm Vehicle Headunit Functionality" | Refer to Confirm Vehicle Headunit Functionality [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] | |
| The LEXUS App Suite app (Infotainment Apps) cannot be updated | Proceed to "Confirm Cellular Phone Functionality" | Refer to Confirm Cellular Phone Functionality [12/2017 - 10/2020] |
| Proceed to "Confirm Vehicle Headunit Functionality" | Refer to Confirm Vehicle Headunit Functionality [12/2017 - 10/2020] | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | Refer to OPERATION CHECK [12/2017 - 10/2020] | |
| Radio receiver assembly | Refer to REMOVAL [12/2017 - 10/2022] |
COMMUNICATION BASED VOICE RECOGNITION FUNCTION
| Symptom | Suspected Area | Link |
|---|---|---|
| Does not recognize voice commands performed to contact support center | Check if the LEXUS ENFORM service is available | - |
| Check if the normal voice recognition function is operating correctly | Refer to PROBLEM SYMPTOMS TABLE [12/2017 - 09/2018] , or refer to PROBLEM SYMPTOMS TABLE [09/2018 - 10/2020] | |
| Proceed to "Does not Recognize Voice Commands Performed to Contact Support Center" | Refer to Does not Recognize Voice Commands Performed to Contact Support Center [12/2017 - 10/2020] | |
| The microphone button on the keyboard input screen does not become enabled | Check if the LEXUS ENFORM service is available | - |
| Proceed to "UNABLE TO CONNECT TO CALL CENTER" | Refer to UNABLE TO CONNECT TO CALL CENTER [12/2017 - 10/2020] |