STEERING LOCK 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.

Steering Lock Function
Symptom	Suspected Area	See page
Steering wheel cannot be unlocked (the engine cannot be started).	Initialization	Click here
	Check for DTCs in the entry and start system.	Click here
	Check for DTCs in the engine immobiliser system.	Click here
	Check that the LCK/UNLOCK REC item in the Data List of the certification ECU displays YES within 10 seconds after starting the engine. (If it displays NO, see "No steering unlock command" in this table.)	Click here
	Check the output from the IGE terminal of the steering lock ECU.	Click here
	Steering lock ECU power source circuit	Click here
	Replace the steering lock ECU.	Click here
Steering wheel cannot be unlocked (no steering unlock command).	Check that the S CODE MACH item in the Data List of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	Click here
	Check that the L CODE MACH item in the Data List of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	Click here
	Replace the certification ECU.	-
Steering wheel cannot be locked.	Check for DTCs in the entry and start system.	Click here
	Check for DTCs in the engine immobiliser system.	Click here
	With the engine switch off and the shift lever in P, open and close the driver door. After that, check that the LCK/ UNLOCK REC item in the Data List of the certification ECU displays YES within 10 seconds. (If it displays NO, see "No steering lock command" in this table.)	Click here
	Check the output from the IGE terminal of the steering lock ECU.	Click here
	Steering lock ECU power source circuit.	Click here
	Replace the steering lock ECU.	Click here
Steering wheel cannot be locked (no steering lock command).	Courtesy light switch circuit	Click here
	Check that the S CODE MACH item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	Click here
	Check that the L CODE MACH item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	Click here
	Replace the certification ECU.	-

Push Button Start Function
Symptom	Suspected Area	See page
Engine does not start.	Initialization	Click here
	Check for DTCs in the entry and start system.	Click here
	Check for DTCs in the engine immobiliser system.	Click here
	Check that the engine switch is turned on.	-
	Check cranking operation. (If cranking operation is possible, see Engine dose not start due to the engine immobiliser in this table.)	-
	Check the SHIFT P SIG item in the Data List of the power source control ECU and confirm that the shift signal is normal.	-
	Check whether the steering wheel is locked or unlocked. (If it is locked, see "Steering wheel cannot be unlocked" in the steering lock function table.)	-
	Check the output from the SLP1 terminal of the steering lock ECU.	Click here
	Check the output signal from the engine switch of the certification ECU (DTC B2275).	Click here
	Replace the power source control ECU.	-
Engine does not start due to the engine immobiliser.	Check that the L CODE MACH item in the Data List of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	Click here
	Check that the ENG START REQ item in the Data List of the certification ECU displays YES. (If it displays NO, replace the certification ECU.)	Click here
	Check that the S CODE MACH item in the Data List of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	Click here
	Replace the ID code box.	-