Problem Symptoms Table

Inspect the suspected areas in numerical order by referring to the corresponding "Refer To" when any of the following symptoms occurs:

Fig 1: Identifying Short Pin

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ELECTRIC STEERING LOCK FUNCTION:

ELECTRIC STEERING LOCK FUNCTION - SYMPTOM CHART

Symptom	Suspected Area	Refer To
Steering wheel cannot be unlocked (the engine cannot be started).	1. Initialization	INITIALIZATION
	2. Check for DTCs in the smart access system with pushbutton start.	DIAGNOSTIC TROUBLE CODE CHART
	3. Check for DTCs in the engine immobiliser system.	DTC CHECK / CLEAR
	4. Check that the Lock/Unlock Receive 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.)	DTC CHECK/CLEAR
	5. Check the input signal from the IGE terminal of the steering lock ECU.	STEERING LOCK MOTOR DRIVE POWER CIRCUIT
	6. Steering lock ECU power source circuit.	POWER SOURCE CIRCUIT
	7. Replace the steering lock ECU.	STEERING COLUMN ASSEMBLY
Steering wheel cannot be unlocked (no steering unlock command).	1. Check that the S Code Check item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	-
	2. Check that the L Code Check item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	-
	3. Replace the certification ECU.	-
Steering wheel cannot be locked.	1. Check for DTCs in the smart access system with pushbutton start.	DIAGNOSTIC TROUBLE CODE CHART
	2. Check for DTCs in the engine immobiliser system.	DTC CHECK / CLEAR
	3. With the engine switch off and the shift lever in the P position, open and close the drivers door. After that, check that the Lock/Unlock Receive 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.)	DTC CHECK/CLEAR
	4. Check the input signal from the IGE terminal of the steering lock ECU.	STEERING LOCK MOTOR DRIVE POWER CIRCUIT
	5 Steering lock ECU power source circuit.	POWER SOURCE CIRCUIT
	6. Replace the steering lock ECU.	STEERING COLUMN ASSEMBLY
Steering wheel cannot be locked (no steering lock command).	1. Courtesy light switch circuit	DOOR COURTESY SWITCH CIRCUIT
	2. Check that the S Code Check item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	-
	3. Check that the L Code Check item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	-
	4. Replace the certification ECU.	-

SMART ACCESS SYSTEM WITH PUSH-BUTTON START FUNCTION:

SMART ACCESS SYSTEM WITH PUSH-BUTTON START FUNCTION - SYMPTOM CHART

Symptom	Suspected Area	Refer To
Engine does not start.	1. Initialization	INITIALIZATION
	2. Check for DTCs in the smart access system with pushbutton start.	DIAGNOSTIC TROUBLE CODE CHART
	3. Check for DTCs in the engine immobiliser system.	DTC CHECK / CLEAR
	4. Check that the engine switch is turned on (IG).	-
	5. Check cranking operation. (If cranking operation is possible, see "Engine does not start due to the engine immobiliser" in this table.)	-
	6. Check Shift P Signal in the DATA LIST of the main body ECU and confirm that the shift signal is normal.	-
	7. 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.)	-
	8. Check the output from the SLP terminal of the steering lock ECU.	UNLOCK POSITION SENSOR SIGNAL CIRCUIT
	9. Check the output signal from the ST SW of the certification ECU (DTC B2275).	DTC B2275 STSW MONITOR MALFUNCTION
	10. Replace the main body ECU.	-
Engine does not start due to the engine immobiliser.	1. Check that the L Code Check item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	-
	2. Check that the Engine Start Request item in the DATA LIST of the certification ECU displays YES. (If it displays NO, replace the certification ECU.)	-
	3. Check that the S Code Check item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.)	-
	4 Replace the ID code box.	-