Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

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.
  • When a symptom indicates that a service is malfunctioning, use the Techstream to check whether the service subscription is active.

    Click here

Voice Guidance

Symptom

Suspected Area

Link

"Communication Module failure detected, please contact your dealer" message is played

Diagnostic Trouble Code Chart

(Red Indicator has failed and cannot indicate a failure)

"Communication Module Activation Failed" message is played

Verify any network problems by calling the Lexus Customer Assistance Center and select prompt for "Lexus Enform with Safety Connect"

-

Wait for a while, then move to different location and retry (try to find location with better signal reception)

-

Diagnostic Trouble Code Chart

"Unable to Connect the Emergency Call Center" or "Unable to Connect to the Call Center" message is played

Verify any network problems by calling the Lexus Customer Assistance Center and select prompt for "Lexus Enform with Safety Connect"

-

Wait for a while, then move to different location and retry (try to find location with better signal reception)

-

Perform Vehicle Inquiry on Techstream and verify subscription status

-

Refer to UNABLE TO CONNECT TO CALL CENTER

"Safety Connect is not active" message is played

Perform Vehicle Inquiry on Techstream and verify subscription status

-

Explain to the customer that the system is in shipping mode, and confirm whether or not they would like to change to active mode

-

Indicator Condition

Symptom

Suspected Area

Link

Green indicator abnormal (Remains OFF)

Refer to GREEN INDICATOR REMAINS OFF

Red indicator abnormal (Remains ON)

Refer to RED INDICATOR REMAINS ON

Illumination on the manual (SOS) switch panel does not turn on

Proceed to "Emergency Call Switch Illumination Circuit"

    Initialization
    INITIALIZATION RESET BACK-UP BATTERY CONDITION HINT: If the back-up battery (mobilephone battery) has been replaced, it is necessary to perform the Reset Backup Battery Condition procedure. (a) Connec ...

    Diagnosis System
    DIAGNOSIS SYSTEM DESCRIPTION (a) The DCM (telematics transceiver) control the vehicle safety connect system functions. Safety connect system data and Diagnostic Trouble Codes (DTCs) can be read throug ...

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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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