ENGINE IMMOBILISER SYSTEM (w/o Entry and Start 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	ECU power source circuit	Click here
	ECD system (for 1AD-FTV [for CCo])	Click here
	ECD system (for 1AD-FTV [for DPF])	Click here
	ECD system (for 2AD-FHV)	Click here
	SFI system (for 1ZR-FAE)	Click here
	SFI system (for 2ZR-FAE)	Click here
	Transponder key ECU	Click here
Security indicator light malfunction	Security indicator light circuit	Click here
Unable to register key	Door courtesy light switch	Click here
	Key	-
	Transponder key ECU	Click here