Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: 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.
Wireless Door Lock Control System

Symptom

Suspected Area

Link

Wireless control function and entry function do not operate

Proceed to "All Door Entry Lock / Unlock Functions and Wireless Functions do not Operate"

Wireless control function does not operate but entry function operates

Electrical key transmitter sub-assembly

-

Only answer-back function does not operate properly

Proceed to "No Answer-Back"

Only automatic lock function does not operate properly

Perform operation check

Lighting system (Int) (Door courtesy switch circuit)

Main body ECU (Multiplex network body ECU)

-

Only illuminated entry function does not operate

Perform operation check

Lighting system (Int)

Main body ECU (Multiplex network body ECU)

-

Only door ajar warning function does not operate

Wireless Door Lock Buzzer

Only panic alarm function does not operate

Perform operation check

Lighting system (Ext) (Hazard warning lights)

Theft deterrent system (Vehicle horns)

Main body ECU (Multiplex network body ECU)

-

    Customize Parameters
    CUSTOMIZE PARAMETERS CUSTOMIZE WIRELESS DOOR LOCK CONTROL SYSTEM HINT: The following items can be customized. NOTICE: When the customer requests a change in a function, first make sure that the fun ...

    Terminals Of Ecu
    TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junc ...

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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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