Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

If the multiplex network door ECU has been removed and installed or replaced, or if any of the connectors have been disconnected, initialize the power back door system.

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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.
Power Back Door System

Symptom

Suspected Area

Link

Power back door cannot be operated using any switch

Meter / gauge system

Power back door sensor assembly LH

Power back door sensor assembly RH

Wire harness and connector

Multiplex network door ECU

Power back door does not operate using the cabin switch

Power back door switch (integration control and panel assembly)

Wire harness and connector

Multiplex network door ECU

Main body ECU (multiplex network body ECU)

Power back door does not operate outside switch

Back door control switch

Wire harness and connector

Multiplex network door ECU

Power back door cannot be opened using the back door opener switch assembly (open switch) (back door entry unlock function is normally)

Multiplex network door ECU

Power back door cannot be operated using kick sensor*

Wire harness and connector

Kick door control sensor

Multiplex network door ECU

Power back door cannot be operated using kick sensor and back door opener switch*

Smart access system (for Entry Function)

Power back door close and lock function does not operate

Door control switch

Wire harness and connector

Multiplex network door ECU

Back door closer does not operate

Back door visual check (foreign objects)

Back door lock assembly

Wire harness and connector

Multiplex network door ECU

The back door closer does not reverse rotation operation properly when the back door opener switch assembly (open switch) is operated (during the back door closer operation).

Smart access system (for Entry Function)

Multiplex network door ECU

Power back door warning system does not operate

Wireless door lock control system

Wire harness and connector

Power back door warning buzzer

Multiplex network door ECU

Jam protection function activates during power back door operation

Back door visual check (foreign objects)

Power back door unit assembly set LH

Power back door unit assembly set RH

Power back door sensor assembly LH

Power back door sensor assembly RH

Wire harness and connector

Multiplex network door ECU

  • *: w/ Hands Free Power Back Door
    Initialization
    INITIALIZATION INITIALIZE MULTIPLEX NETWORK DOOR ECU NOTICE: Initialization of the multiplex network door ECU (back door initial position learning) is necessary if any of the following have been perfo ...

    Dtc Check / Clear
    DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Back Door / Trouble ...

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    COMPONENTS ILLUSTRATION *1 REAR DOOR SCUFF PLATE LH *2 UPPER QUARTER TRIM PAD LH *3 REAR SEAT SIDE GARNISH LH - - ILLUSTRATION *1 REAR DOOR SCUFF PLATE RH *2 UPPER QUARTER TRIM PAD RH *3 REAR SEAT SIDE GARNISH RH - - ILLUSTRATION *1 FRONT FLOOR CAR ...

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

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

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