Lexus ES: 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.
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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.
| 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 |
|---|---|---|
| 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" | |
| 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 audio and visual system*1 or navigation system*2 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 | |
*1: w/o Navigation System
*2: w/ Navigation System
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System Description
SYSTEM DESCRIPTION DESCRIPTION
LEXUS ENFORM allows the vehicle to receive information from the call center and links the information to the audio and visual system*1 or navigation system*2. LEXUS E
System Diagram
SYSTEM DIAGRAM w/ Navigation System
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
SEE MORE:
Automatic High Beam
The Automatic High Beam uses an
in-vehicle camera sensor to assess
the brightness of streetlights, the
lights of vehicle ahead, etc., and
automatically turns the high beam
on or off as necessary.
WARNING
â– Limitations of the Automatic High
Beam
Do not rely on the Automatic High
Beam. Alwa
Tire Pressure Monitor ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Tire Pressure Monitor ECU Communication Stop Mode Any of the following conditions are met:
Communication stop for "Tire Pressure" is indicated on the "Communication Bus Check" screen of the Techstream.
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Communication stop
