THEFT DETERRENT SYSTEM PROBLEM SYMPTOMS TABLE

Note


  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing troubleshooting, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

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    • *: w/ Door Control Battery

Tech Tips


  • Troubleshooting of the theft deterrent system is based on the premise that the power door lock control system and the wireless door lock control system are operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that the power door lock control system and the wireless door lock control system are operating normally.

  • 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.

Theft Deterrent System
Symptom Suspected Area Link
Theft deterrent system cannot be set Refer to "Security Indicator Light Does not Blink"*1

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Refer to "Security Indicator Light Does not Blink"*2

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Refer to "Front Door Courtesy Switch Circuit"

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Refer to "Rear Door Courtesy Switch Circuit"

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Refer to "Luggage Compartment Door Courtesy Switch Circuit"

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Front door lock with motor assembly

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Rear door lock with motor assembly

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Luggage compartment door lock assembly

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Refer to "Ignition Switch Circuit"*2

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Refer to "Unlock Warning Switch Circuit"*2

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Refer to "Engine Hood Courtesy Switch Circuit"

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Security indicator light does not blink when theft deterrent system is set Refer to "Security Indicator Light Does not Blink"*1

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Refer to "Security Indicator Light Does not Blink"*2

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Alarm sounding state cannot be canceled when engine switch is turned on (IG)*1 Refer to "Smart Entry and Start System (for Start Function)"

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Certification ECU (Smart key ECU assembly) -
If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (multiplex network body ECU)

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Alarm sounding state cannot be canceled when ignition switch is turned to ON*2 Refer to "Ignition Switch Circuit"

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Refer to "Unlock Warning Switch Circuit"

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If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (multiplex network body ECU)

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Theft deterrent system can be set even when door is open Refer to "Front Door Courtesy Switch Circuit"

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Refer to "Rear Door Courtesy Switch Circuit"

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Refer to "Luggage Compartment Door Courtesy Switch Circuit"

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If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (multiplex network body ECU)

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Theft deterrent system can be set even when engine hood is open Refer to "Engine Hood Courtesy Switch Circuit"

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Vehicle horns do not sound while theft deterrent system is in alarm sounding state Refer to "Horn Circuit"

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Hazard warning lights do not flash while theft deterrent system is in alarm sounding state Combination meter assembly -
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU)

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Security horn does not sound while theft deterrent system is in alarm sounding state Refer to "Security Horn Circuit"

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Hazard warning lights flash even when theft deterrent system is not set Combination meter assembly -
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU)

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The vehicle does not enter the alarm sounding state as the battery is reconnected Check the battery*3

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Check the battery*4

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Check the battery*5

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Refer to "Power Source Circuit"

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