Lexus RX (RX 350L, RX450h) 2016-2025 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.
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| 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 | - |
| 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 ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Sfi System: Idle Control System (P050500)
DESCRIPTION The idle speed is controlled by the ETCS (Electronic Throttle Control System). The ETCS is comprised of: 1) the one valve type throttle body; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position sensor, which detects the opening angle of the throttle valv ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Audio And Visual System (for 12.3 Inch Display): Stereo Component Amplifier Malfunction (B15A3)
DESCRIPTION This DTC is stored when a malfunction occurs in the stereo component amplifier assembly. DTC No. Detection Item DTC Detection Condition Trouble Area B15A3 Stereo Component Amplifier Malfunction When any of the following conditions is met:
Internal power supply malfunc ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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