THEFT DETERRENT SYSTEM PROBLEM SYMPTOMS TABLE

Tip:

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.

Table 1. Theft Deterrent System
Symptom	Suspected Area	Link
Theft deterrent system cannot be set	Immobiliser system (w/ entry and start system) "security indicator light does not blink"*1	Click here Click here Click here
	Immobiliser system (w/o entry and start system) "security indicator light does not blink"*2	Click here Click here Click here
	Front door courtesy switch circuit	Click here
	Rear door courtesy switch circuit	Click here
	Back door courtesy switch circuit	Click here
	Front door lock assembly	Click here
	Rear door lock assembly	Click here
	Back door lock assembly	Click here3 Click here4
	Engine hood courtesy switch circuit	Click here Click here
	Ignition switch circuit*2	Click here Click here
	Unlock warning switch circuit*2	Click here
	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)	Click here
Security indicator light does not blink when theft deterrent system is set	Immobiliser system (w/ entry and start system) "security indicator light does not blink"*1	Click here Click here Click here
	Immobiliser system (w/o entry and start system) "security indicator light does not blink"*2	Click here Click here Click here
Alarm sounding state cannot be canceled when ignition switch is turned to ON*1	Entry and start system (for start function)	Click here Click here
	Certification ECU (smart key ECU 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)	Click here
Theft deterrent system can be set even when door is open	Front door courtesy switch circuit	Click here
	Rear door courtesy switch circuit	Click here
	Back door courtesy switch circuit	Click here
	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)	Click here
Theft deterrent system can be set even when engine hood is open	Engine hood courtesy switch circuit	Click here Click here
Vehicle horn does not sound while theft deterrent system is in warning operation	Horn circuit	Click here
Hazard warning lights do not flash while theft deterrent system is in warning operation	Combination meter 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)	Click here
Security horn does not sound while theft deterrent system is in warning operation	Security horn circuit	Click here
Hazard warning lights flash even when theft deterrent system is not set	Combination meter 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)	Click here

*1: w/ Entry and Start System
*2: w/o Entry and Start System
*3: for Hatchback
*4: for Wagon