STEERING LOCK SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of the problem symptom. 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.

Steering lock system
Symptom	Suspected Area	See page
Steering wheel cannot unlock (hybrid control system cannot start).	Steering lock actuator assembly (steering lock ECU)	Click here
	Main body ECU	Click here
	Certification ECU	Click here
	Entry and start system	Click here
	Steering lock motor drive power circuit	Click here
	Unlock position sensor signal circuit	Click here
	Power source circuit	Click here
Steering wheel cannot unlock (after connecting intelligent tester to DLC3, power switch ON (IG), Data List certification ECUs item Lock/Unlock Receive data is read, and steering lock command reception records display is NO).	Main body ECU	Click here
	Certification ECU	Click here
	ID code box	Click here
	LIN communication line	Click here
	Entry and start system	Click here
Steering wheel cannot lock	Steering lock actuator assembly (steering lock ECU)	Click here
	Main body ECU	Click here
	Certification ECU	Click here
	Entry and start system	Click here
	Steering lock motor drive power circuit	Click here
	Power source circuit	Click here
Steering wheel cannot lock (after connecting intelligent tester to DLC3, power switch ON (IG), Data List certification ECUs item Lock/Unlock Receive data is read, and steering lock command reception records display is NO).	Main body ECU	Click here
	Certification ECU	Click here
	ID code box	Click here
	LIN communication line	Click here
	Entry and start system	Click here