IMMOBILISER SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

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.
If the problem only occurs in certain locations or at certain times of day, check for wave interference.
If the vehicle components are added, check for wave interference from the added components.

Immobiliser System
Symptom	Suspected Area	See page
Security indicator light does not blink	Proceed to "Security Indicator Light Does not Blinking"	Click here
Engine cannot be started*1	Certification ECU (smart key ECU assembly)	Click here
	ID code box ECU (immobiliser code ECU)	Click here
	ECM	Click here
	SFI system	Click here
Power source mode cannot be changed*1	Engine switch	Click here
Power source mode cannot be changed*1	Certification ECU (smart key ECU assembly)	Click here
Steering lock lock/unlock not possible*2	Steering lock ECU (steering lock actuator assembly)	Click here

*1: Refer to Problem Symptoms Table for Smart Entry and Start System (for Start Function).
*2: Refer to Problem Symptoms Table for Steering Lock System.