Lexus ES manuals

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

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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"

Emergency Call Function

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 Diagram

SYSTEM DIAGRAM

 Terminals Of Ecu

TERMINALS OF ECU Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G128-1 (+B) - G128-20 (E) BR - W-B Power source (+B) Power switch off 11

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 Abnormal Height Sensor Data at Initialization (B2452)

DESCRIPTION The headlight ECU sub-assembly LH stores this DTC if the value from the rear height control sensor sub-assembly LH is out of range when performing initialization of the headlight ECU sub-assembly LH, such as when the vehicle is not level or jacked up. DTC No. Detection Item DTC De

 Parts Location

PARTS LOCATION ILLUSTRATION *1 TIRE PRESSURE WARNING ECU AND RECEIVER *2 TIRE PRESSURE WARNING VALVE AND TRANSMITTER ILLUSTRATION *1 STEERING PAD SWITCH ASSEMBLY *2 COMBINATION METER ASSEMBLY - TIRE PRESSURE WARNING LIGHT - MULTI-INFORMATION DISPLAY *3 MAIN BODY ECU (MUL

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