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 .gif)
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:
Terminals Of Ecu
TERMINALS OF ECU CHECK WINDSHIELD WIPER MOTOR ASSEMBLY (a) Disconnect the A38 windshield wiper motor assembly connector. (b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Descrip
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
spark plug removal/installation are shown below.
Necessary Procedures After Parts Removed/Instal
