ENGINE 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.

Engine Immobiliser System
Symptom	Suspected Area	See page
Engine does not start	LIN communication system	Click here
	ID code box power source circuit	Click here
	Certification ECU power source circuit	Click here
	Steering lock ECU power source circuit	Click here
	Entry and start system (for start function)	Click here
	SFI system (for 3UR-FE)	Click here
	SFI system (for 1UR-FE)	Click here
Security indicator malfunction	Security indicator light circuit	Click here