Lexus ES: 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
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Steering wheel heater temperature adjustment switch operation condition
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Steering wheel heater automatic operation switch condition
| CAN |
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SYSTEM DESCRIPTION HEATED STEERING WHEEL SYSTEM (a) The heated steering wheel system heats the steering wheel assembly when the system is turned on using the steering wheel heater switch (refreshing s
CAUTION / NOTICE / HINT HINT:
Use these procedures to troubleshoot the heated steering wheel system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
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CUSTOMIZE PARAMETERS CUSTOMIZE HEATED STEERING WHEEL SYSTEM (a) Customizing with the Techstream. NOTICE:
When the customer requests a change in a function, first make sure that the function can be
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CAUTION / NOTICE / HINT NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
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When replacing the radio receiver assembly, alw
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Sliding Roof / Trouble Codes. Body Electrical > Sliding Roof > Trouble Codes (e) Check the details of the DTC(s).
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