Lexus ES: 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.
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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 |
|---|---|---|
| "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" | |
| Symptom | Suspected Area | Link |
|---|---|---|
| The operator's voice is wavering/choppy during the emergency call | Set the volume at the default or lower if the customize volume is set to a value larger than the default | |
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Red Indicator Remains On
DESCRIPTION This means that the DCM (telematics transceiver) has detected a malfunction in the safety connect system and stored a DTC or specific vehicle control history (RoB) Code. PROCEDURE 1.
System Description
SYSTEM DESCRIPTION DESCRIPTION (a) Safety Connect performs ACN (Automatic Collision Notification), manual emergency calling, stolen vehicle tracking and roadside assistance service by, audio and data
System Diagram
SYSTEM DIAGRAM
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Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during motor generator control ECU kit removal/installation are shown below. Necessary Procedures After Parts
System Diagram
SYSTEM DIAGRAM (a) The CAN communication system is composed of 5 buses. CAN Main Bus Line Terminating Resistor CAN Branch Line * Gateway Function Equipped ECU Bus Monitoring Direction - - Connected to Code ECU/Sensor Name CAN DTC Storage Note - C
