Toyota Avalon Service & 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

Check for DTCs

Lighting system (Int) (Front door courtesy switch circuit)

Lighting system (Int) (Rear door courtesy switch circuit)

Power door lock control system

Wave interference

Transmitter battery

Electrical key transmitter sub-assembly

Wire harness or connector

Check connector connection condition

Electrical key and tire pressure monitoring system receiver assembly

Certification ECU (Smart key ECU assembly)

Main body ECU (Multiplex network body ECU)

B code registration failed

Wireless control function does not operate but entry function operates

Electrical key transmitter sub-assembly

-

Only answer-back function does not operate properly

Check customize setting

Perform operation check

Lighting system (Int) (Door unlock detection switch circuit)

Main body ECU (Multiplex network body ECU)

Wireless door lock buzzer

Instrument panel junction block assembly

Wire harness or connector

Lighting system (Ext) (Hazard warning switch circuit)

Only automatic lock function does not operate properly

Perform operation check

Lighting system (Int) (Front door courtesy switch circuit)

Lighting system (Int) (Rear 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 buzzer function does not operate

Wireless door lock buzzer

Only panic alarm function does not operate

Perform operation check

Lighting system (Int) (Interior lights)

Lighting system (Ext) (Headlights, taillights, hazard warning lights)*1

Lighting system (Ext) (Headlights, taillights, hazard warning lights)*2

Theft deterrent system (Vehicle horns, Security horn)

Main body ECU (Multiplex network body ECU)

-

  • *1: w/ Cornering Light
  • *2: w/o Cornering Light
    Precaution

    System Diagram

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