Toyota Tundra Service 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

See page

All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder

Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder"

All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch

Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch"

Only Driver Door LOCK/UNLOCK Functions do not Operate

Front door lock assembly LH (for Double Cab)

Front door lock assembly LH (for CrewMax)

Driver side junction block assembly

Harness or connector

-

Only Front Passenger Door LOCK/UNLOCK Functions do not Operate

Front door lock assembly RH (for Double Cab)

Front door lock assembly RH (for CrewMax)

Harness or connector

-

Only Rear Door LH LOCK/UNLOCK Functions do not Operate

Rear door lock assembly LH (for Double Cab)

Rear door lock assembly LH (for CrewMax)

Harness or connector

-

Only Rear Door RH LOCK/UNLOCK Functions do not Operate

Rear door lock assembly RH (for Double Cab)

Rear door lock assembly RH (for CrewMax)

Harness or connector

-

Key Lock-in Prevention Function does not Work Properly

Front courtesy light switch LH

Unlock warning switch assembly

Harness or connector

-

Driver side 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 transmission system operates normally).

CAN communication system

Main body ECU (multiplex network body ECU)

ECM

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 lock operation was not performed, doors were in a locked state.

Main body ECU (Multiplex network body ECU)

Lock operation continues even after doors have been locked (for Double Cab)*

Front door lock assembly LH

Front door lock assembly RH

Rear door lock assembly LH

Rear door lock assembly RH

Harness or connector

-

Driver side junction block assembly

Main body ECU (multiplex network body ECU)

Lock operation continues even after doors have been locked (for CrewMax)*

Front door lock assembly LH

Front door lock assembly RH

Rear door lock assembly LH

Rear door lock assembly RH

Harness or connector

-

Driver side junction block assembly

Main body ECU (multiplex network body ECU)

  • *: 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.
    Parts Location

    System Description

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