Lexus ES manuals

Lexus ES: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

for Gasoline Model: Click here

for HV Model: Click here

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.

Horn System

Symptom

Suspected Area

Link

Horn does not sound

HORN fuse

-

HORN relay

Horn button assembly

Spiral cable sub-assembly

Instrument panel junction block assembly

Harness or connector

-

Horn sounds all the time

HORN relay

Horn button assembly

Spiral cable sub-assembly

Instrument panel junction block assembly

Main body ECU (Multiplex network body ECU)

Harness or connector

-

Low pitched horn operates but high pitched horn does not operate

High pitched horn assembly

Harness or connector

-

High pitched horn operates but low pitched horn does not operate

Low pitched horn assembly

Harness or connector

-

READ NEXT:

 System Diagram

SYSTEM DIAGRAM

 Data List / Active Test

DATA LIST / ACTIVE TEST ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive func

 Relay

On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE 1. INSPECT HORN RELAY *a Component without harness connected (HORN Relay) (a) Measure the resistance according to the value(s) in the tab

SEE MORE:

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Power Mirror Control System (w/ Memory) DTC No. Detection Item Link U0142 Lost Communication with Main Body ECU

 How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the window defogger system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT: In troubleshooting, confirm that the problem sym

© 2016-2024 Copyright www.lexguide.net