Lexus ES: System Diagram
SYSTEM DIAGRAM

Communication Table
Transmitting ECU (Transmitter) | Receiving ECU | Signal | Communication Method |
Main Body ECU (Multiplex Network Body ECU) | Multiplex Tilt and Telescopic ECU | -
IG SW signal
-
Store command of driver seat memory
-
Recall command of driver seat memory
-
Auto away/return state signal
| CAN |
Position Control ECU Assembly (Driver Seat) | Multiplex Tilt and Telescopic ECU | -
Memory recall signal
-
Start signal to play tilt and telescopic steering
-
Stop signal to play memory
|
Combination Meter Assembly | Multiplex Tilt and Telescopic ECU | Vehicle speed signal |
Multiplex Tilt and Telescopic ECU | Main Body ECU (Multiplex Network Body ECU) | State signal of tilt and telescopic steering |
Multiplex Tilt and Telescopic ECU | Position Control ECU Assembly (Driver Seat) | -
Tilt and telescopic recall and execution signal
-
Tilt and telescopic recall and end signal
|
Tilt and Telescopic Switch | Multiplex Tilt and Telescopic ECU | Tilt and Telescopic Switch signal | Direct line |
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SYSTEM DESCRIPTION FUNCTION OF MAIN COMPONENTS Component Function Multiplex tilt and telescopic ECU This ECU sends a control signal to the tilt motor (steering column assembly) and telescop
CAUTION / NOTICE / HINT HINT: *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure the auxiliary bat
CUSTOMIZE PARAMETERS CUSTOMIZE POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM HINT: The following items can be customized. NOTICE:
When the customer requests a change in a function, first m
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DESCRIPTION The ATF temperature sensor converts the automatic transaxle fluid (ATF) temperature into a resistance value for use by the ECM. The ECM applies a voltage to the temperature sensor through terminal THO1 of the ECM. The sensor resistance changes with the ATF temperature. As the temperature
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area U0142 Lost Communication with Main Body ECU No communication with main body ECU (multiplex network body ECU)
CAN communication system
Main body ECU (multiplex network body ECU)
PROCEDURE 1. GO
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