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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Body & Frame >> Seats >> Front Power Seat Control System - Diagnostics - Introduction (1 Of 3) >> Front Power Seat Control System >> System Diagram [09/2019 - 10/2022] >> System Diagram [09/2019 - 10/2022]
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System Diagram [09/2019 - 10/2022]

  1. for Driver Seat: 
    Fig 1: Front Power Seat Control System Diagram (For Driver Seat; 1 Of 3)
    GTY970348Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Front Power Seat Control System Diagram (For Driver Seat; 2 Of 3)
    GTY970381Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 3: Front Power Seat Control System Diagram (For Driver Seat; 3 Of 3)
    GTY970142Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    COMMUNICATION TABLE

    Sender Receiver Signal Line
    ECM Main body ECU (multiplex network body ECU)
    • Transmission information
    • Shift position P signal
    CAN
    Front multiplex network door ECU (for Driver Seat) Main body ECU (multiplex network body ECU)
    • M1 switch signal
    • M2 switch signal
    • M3 switch signal
    • SET switch signal
    CAN
    Main body ECU (multiplex network body ECU) Front multiplex network door ECU (for Driver Seat)
    • Shift position P signal
    • Vehicle speed signal
    • Transmission information
    • Driving position buzzer request
    • Driver seat position request
    • Driver seat position data
    CAN
    Certification ECU (smart key ECU assembly) Main body ECU (multiplex network body ECU)
    • Engine switch signal
    • Memory call replay request
    • Key identification No. 1 to No. 7 acquisition condition
    CAN
    Position control ECU assembly Main body ECU (multiplex network body ECU)
    • State signal of driver seat
    • State signal of driving position buzzer
    CAN
  2. for Front Passenger Seat: 
    Fig 4: Front Power Seat Control System Diagram (For Front Passenger Seat; 1 Of 3)
    GTY970347Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Front Power Seat Control System Diagram (For Front Passenger Seat; 2 Of 3)
    GTY970408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 6: Front Power Seat Control System Diagram (For Front Passenger Seat; 3 Of 3)
    GTY970139Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    COMMUNICATION TABLE

    Sender Receiver Signal Line
    ECM Main body ECU (multiplex network body ECU)
    • Transmission information
    • Shift position P signal
    CAN
    Main body ECU (multiplex network body ECU) Position control ECU assembly (for Front Passenger Seat)
    • Shift position P signal
    • Vehicle speed signal
    • Transmission information
    • Front passenger seat position request
    • Front passenger seat position data
    CAN