Toyota CH-R Service Manual: Problem Symptoms Table

Toyota CH-R Service Manual / Door Lock / Power Door Lock Control System / 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

-

Only back door open function does not operate.

Proceed to "Only Back Door cannot be Opened"

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

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

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)

-

Double locking function does not operate properly*2

LIN communication system

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

-

Double lock door control relay assembly

-

Main body ECU (Multiplex network body ECU)

-

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)

-

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

Proceed to "Improper Operation"

When returning to the vehicle, although door lock operation was not performed, doors were in a locked state.

Proceed to "Improper Operation"

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: w/o Toyota Safety Sense P
    Initialization
    INITIALIZATION BACK DOOR LOCK (a) When the battery is reconnected: If the back door is locked and therefore cannot be opened, it is necessary to unlock the back door using the door control switch ...

    Terminals Of Ecu
    TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *A Main Body ECU (Multiplex Network Body ECU) with 2 Connecto ...

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