Lexus ES manuals

Lexus ES: Problem Symptoms Table



  • 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.
Luggage Compartment Door Opener System


Suspected Area


Luggage door opener does not operate

Proceed to "Luggage Compartment Door Opener does not Operate"


 Terminals Of Ecu

TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junc

 Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a pa

 Luggage Compartment Door Opener does not Operate

DESCRIPTION The main body ECU (multiplex network body ECU) receives switch signals from the trunk and fuel switch assembly (luggage compartment door opening switch) the luggage door opening cancel swi


 Headlight Dimmer Switch Circuit

DESCRIPTION The steering sensor receives the following switch information: Light control switch in DRL OFF*, tail, head or AUTO position Dimmer switch in high, low or high flash (pass) position *: w/ DRL OFF Switch WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Before replacing the ma

 System Diagram

SYSTEM DIAGRAM SYSTEM DIAGRAM Communication Table Sender Receiver Signal Line Radio Receiver Assembly Air Conditioning Amplifier Assembly Steering wheel heater switch operation condition Steering wheel heater temperature adjustment switch operation condition Steering wheel h

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