Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Problem Symptoms Table

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Vehicle Interior / Seat / Front Power Seat Control System(w/o Memory) / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

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.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Front Power Seat Control System (w/o Memory) (for Driver)

Symptom

Suspected Area

Link

All functions do not operate

Front power seat switch LH

Wire harness or connector

-

Only slide function does not operate

Front power seat switch LH

Slide motor (Front seat adjuster assembly LH)

Wire harness or connector

-

Only front vertical function does not operate

Front power seat switch LH

Front vertical motor (Front seat adjuster assembly LH)

Wire harness or connector

-

Only lifter function does not operate

Front power seat switch LH

Lifter motor (Front seat adjuster assembly LH)

Wire harness or connector

-

Only reclining function does not operate

Front power seat switch LH

Reclining motor (Front seatback frame sub-assembly LH)

Wire harness or connector

-

Only lumbar support adjustment function does not operate

Front lumbar power seat switch (driver seat)

Front power seat switch LH

Lumbar support adjuster assembly LH

Wire harness or connector

-
Front Power Seat Control System (w/o Memory) (for Front Passenger)

Symptom

Suspected Area

Link

All functions do not operate

Front power seat switch RH

Wire harness or connector

-

Only slide function does not operate

Front power seat switch RH

Slide motor (Front seat adjuster assembly RH)

Wire harness or connector

-

Only front vertical function does not operate

Front power seat switch RH

Front vertical motor (Front seat adjuster assembly RH)

Wire harness or connector

-

Only lifter function does not operate

Front power seat switch RH

Lifter motor (Front seat adjuster assembly RH)

Wire harness or connector

-

Only reclining function does not operate

Front power seat switch RH

Reclining motor (Front seatback frame sub-assembly RH)

Wire harness or connector

-

Only lumbar support adjustment function does not operate

Front lumbar power seat switch (front passenger seat)

Front power seat switch RH

Lumbar support adjuster assembly RH

Wire harness or connector

-

Only cushion length function does not operate*

Seat variable cushion switch RH

Length motor (Front seat vertical adjuster assembly RH)

Wire harness or connector

-
  • *: w/ Seat Variable Cushion Switch
    System Diagram
    SYSTEM DIAGRAM Driver Seat Front Passenger Seat ...

    Front Seat Assembly
    ...

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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