Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: 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 Function).
  • If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure.

    Click here

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"

Screen does not change when Destination Assist is selected on Destination screen

Proceed to "Switch Operation of Remote Touch not Accepted"

Destination Function (w/ Navigation System)

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

Dynamic Voice Recognition (w/ Navigation System)

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"

LEXUS App Suite Function

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

LEXUS App Suite voice recognition is not possible (Voice recognition on the navigation system is normal)

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

Sound quality of LEXUS App Suite function is poor

Check that cellular phone handset volume is turned up

-

Check that adequate signal is maintained while the vehicle is being driven

-

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

    Operation Check
    OPERATION CHECK LEXUS APP SUITE RESET PROCEDURE (a) Duplicate the problem symptom. (b) Check for DTCs and repair the systems for which any DTCs are output. Click here (c) Check cellular phone compat ...

    Terminals Of Ecu
    TERMINALS OF ECU DCM (TELEMATICS TRANSCEIVER) *a to Telephone Antenna (Sub) *b to GPS Antenna *c to Telephone Antenna (Main) - - Terminal No. (Symbol) Wiring Color Termin ...

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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