Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
- 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).
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If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure using the Techstream.
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Before replacing the DCM (telematics transceiver), refer to Registration.
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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.
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When a symptom indicates that a service is malfunctioning, use the Techstream to check whether the service subscription is active.
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| 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" | |
| Screen does not change when Destination Assist is selected on Destination screen | Proceed to "Switch Operation of Remote Touch not Accepted" | |
| 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" | | |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | | |
| Radio receiver assembly | | |
| DCM (Telematics Transceiver) | | |
| Other caller's voice volume cannot be adjusted using the Destination Assist screen | Radio receiver assembly | |
| 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" | | |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | | |
| Proceed to "Confirm Vehicle Headunit Functionality" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | | |
| LEXUS App Suite and services are not operating as expected | Proceed to "UNABLE TO CONNECT TO CALL CENTER" | |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | | |
| Proceed to "Confirm Vehicle Headunit Functionality" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | | |
| Poor sound quality of LEXUS App Suite function | Confirm that adequate signal is maintained during driving | - |
| Proceed to "UNABLE TO CONNECT TO CALL CENTER" | | |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | | |
| Proceed to "Confirm Vehicle Headunit Functionality" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | | |
| The LEXUS App Suite app (Fleet Apps) cannot be installed on the head unit | Proceed to "UNABLE TO CONNECT TO CALL CENTER" | |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | | |
| The LEXUS App Suite app (Fleet Apps) cannot be updated | Proceed to "UNABLE TO CONNECT TO CALL CENTER" | |
| Proceed to "DCM Data Signal Circuit between Navigation ECU and DCM" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | |
| 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" | | |
| Proceed to "Confirm Vehicle Headunit Functionality" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | | |
| LEXUS App Suite and services are not operating as expected | Proceed to "Confirm Cellular Phone Functionality" | |
| Proceed to "Confirm Vehicle Headunit Functionality" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | | |
| 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" | | |
| Proceed to "Confirm Vehicle Headunit Functionality" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | | |
| The LEXUS App Suite app (Infotainment Apps) cannot be installed on the head unit | Proceed to "Confirm Cellular Phone Functionality" | |
| Proceed to "Confirm Vehicle Headunit Functionality" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | | |
| The LEXUS App Suite app (Infotainment Apps) cannot be updated | Proceed to "Confirm Cellular Phone Functionality" | |
| Proceed to "Confirm Vehicle Headunit Functionality" | | |
| Proceed to "LEXUS App Suite Reset Procedure" in Operation Check | | |
| Radio receiver assembly | |
| 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 | | |
| Proceed to "Does not Recognize Voice Commands Performed to Contact Support Center" | | |
| 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" | |
READ NEXT:
Terminals Of Ecu
TERMINALS OF ECU DCM (TELEMATICS TRANSCEIVER) Click here RADIO RECEIVER ASSEMBLY Click here NAVIGATION ECU Click here
Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) Diagnostic Trouble Codes (DTCs) for the LEXUS ENFORM system can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctionin
Confirm Cellular Phone Functionality
PROCEDURE 1. CHECK CUSTOMER'S CELLULAR PHONE COMPATIBILITY (a) Check if the cellular phone is compatible (Refer to http://www.lexus.com/Enform/). Result Proceed to Cellular phone is
SEE MORE:
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be dis
GVIF Disconnected (from Extension Module to H/U) (B153A)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area B153A GVIF Disconnected (from Extension Module to H/U) GVIF disconnected (from navigation ECU to radio receiver assembly)
Navigation ECU
Radio receiver assembly
WIRING DIAGRAM CAUTION / NOTICE / HI
