Toyota CH-R Service Manual: Problem Symptoms Table

Toyota CH-R Service Manual / Door Lock / Wireless Door Lock Control System(w/ Smart Key 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.
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 buzzer function does not operate

Wireless Door Lock Buzzer

Only panic alarm function does not operate*1

Perform operation check

Lighting system (Int) (Interior lights)

Lighting system (EXT) (Headlights, taillights, hazard warning lights)

horn system

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"

  • *1: w/ Toyota Safety Sense P
    Operation Check
    OPERATION CHECK NOTICE WHEN CHECKING FOLLOWING (a) Wireless door lock/unlock function: This wireless door lock control function operates only when the following 3 conditions are met: (1) The eng ...

    Diagnosis System
    DIAGNOSIS SYSTEM DESCRIPTION The main body ECU (multiplex network body ECU) stores DTCs when malfunctions occur. The diagnostic system allows for reading of the DTCs from the DLC3. Use the Techs ...

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