ENTRY AND START SYSTEM (for Start Function) - PROBLEM SYMPTOMS TABLE

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.

Entry and Start System (for Start Function)
Symptom	Suspected Area	See page
Power source mode does not change	AM2 fuse
	IGN fuse
	IG2 MAIN fuse
	Integration relay (IG2 relay) (for 1GR-FE)
	Integration relay (IG2 relay) (for 1UR-FE)
	Integration relay (IG2 relay) (for 3UR-FE)
	Integration relay (IG2 relay) (for 1VD-FTV)
	Engine switch (for 1GR-FE)
	Engine switch (for 1UR-FE)
	Engine switch (for 3UR-FE)
	Engine switch (for 1VD-FTV)
	Main body ECU
	Room oscillator does not recognize key
	Harness or connector
Engine does not start	STOP fuse
	Stop light switch
	ST relay (for 1GR-FE)
	ST relay (for 1UR-FE)
	ST relay (for 3UR-FE)
	ST relay (for 1VD-FTV)
	Park/neutral position switch (for A750F)
	Park/neutral position switch (for AB60F)
	Shift lock control ECU (for A750F)
	Shift lock control ECU (for AB60F)
	Steering lock actuator assembly (Steering lock control ECU)
	ID code box (Immobiliser code ECU)	-
	Certification ECU (Smart key ECU assembly)	-
	Main body ECU
	Steering lock system
	ECM (for 1GR-FE)
	ECM (for 1UR-FE)
	ECM (for 3UR-FE)
	ECM (for 1VD-FTV w/ DPF)
	ECM (for 1VD-FTV w/o DPF)
	Power source mode does not change
	Harness or connector
Engine switch indicator circuit	Engine switch (for 1GR-FE)
	Engine switch (for 1UR-FE)
	Engine switch (for 3UR-FE)
	Engine switch (for 1VD-FTV)
	Main body ECU
	Harness or connector