Toyota Avalon (XX50) 2019-2022 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.
Power Door Lock Control System

Symptom

Suspected Area

Link

Only driver door LOCK functions do not operate

Front door lock with motor assembly LH

Wire harness or connector

-

Instrument panel junction block assembly

-

Only driver door UNLOCK functions do not operate

Front door lock with motor assembly LH

Wire harness or connector

-

Main body ECU (Multiplex network body ECU)

-

Instrument panel junction block assembly

-

Only front passenger door LOCK/UNLOCK functions do not operate

Front door lock with motor assembly RH

Wire harness or connector

-

Instrument panel junction block assembly

-

Only rear door LH LOCK/UNLOCK functions do not operate.

Rear door lock with motor assembly LH

Wire harness or connector

-

Instrument panel junction block assembly

-

Only rear door RH LOCK/UNLOCK functions do not operate.

Rear door lock with motor assembly RH

Wire harness or connector

-

Instrument panel junction block assembly

-

All doors LOCK/UNLOCK functions do not operate via door key cylinder

Main body ECU (Multiplex network body ECU)

Front door lock with motor assembly LH

Wire harness or connector

All doors LOCK/UNLOCK functions do not operate via master switch

Lin communication system

Multiplex network master switch assembly

Main body ECU (Multiplex network body ECU)

All doors LOCK/UNLOCK functions do not operate via door control switch

Main body ECU (Multiplex network body ECU)

Door control switch assembly

Wire harness or connector

Instrument panel junction block assembly

All doors LOCK/UNLOCK functions do not operate via multiplex network master switch assembly and door key cylinder.

Instrument panel junction block assembly

-

Main body ECU (Multiplex network body ECU)

-

Speed-sensitive automatic door lock function does not operate (meter/gauge system operates normally).

CAN communication system

Main body ECU (Multiplex network body ECU)

Shift-linked automatic door lock/unlock functions do not operate (automatic transaxle system operates normally).

CAN communication system

Main body ECU (Multiplex network body ECU)

ECM

Key lock-in prevention function does not operate

Instrument panel junction block assembly

Main body ECU (Multiplex network body ECU)

Wire harness or connector

-

Lock operation continues even after doors have been locked*1

Front door lock with motor assembly LH

Front door lock with motor assembly RH

Rear door lock with motor assembly LH

Rear door lock with motor assembly RH

Wire harness or connector

-

Instrument panel junction block assembly

-

Main body ECU (Multiplex network body ECU)

-

Remote door lock functions do not operate*2

Telematics system

When returning to the vehicle, although door unlock operation was not performed, doors were in an unlocked state.

Main body ECU (Multiplex network body ECU)

When returning to the vehicle, although door unlock operation was not performed, doors were in an unlocked state.

Main body ECU (Multiplex network body ECU)

HINT:

  • *1: When the door unlock detection switch detects an unlock position signal after a door lock operation has been performed, a door lock operation will be performed 3 times.
  • *2: for Toyota Entune Remote Connect Compatible Type
    Precaution

    System Diagram

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