Inspection Procedure

CHECK VEHICLE CONDITION

Check the problem symptom of the steering lock system.

Result

RESULT CHART

Condition	Proceed to
Steering lock cannot be released	A
Steering cannot be locked	B

B: Go to step 6

A: Go to Next Step

READ VALUE USING TECHSTREAM

Turn the engine switch off.
Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Smart Key / Data List.

Select the item below in the Data List, and read its value displayed on the Techstream.

Smart Key

SMART KEY DATA LIST

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Lck/Unlck Rec	Steering lock command reception record / YES or NO	YES: Steering lock/unlock signal received NO: Steering lock/unlock signal not received	-

Check if a steering unlock command signal has been received.

OK: "YES" is displayed on the Techstream display.

NG: CHECK SMART KEY SYSTEM (for Start Function) (See HOW TO PROCEED WITH TROUBLESHOOTING )

OK: Go to Next Step

INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Condition	Specified Condition
E39-3 (IGE) - E39-1 (GND)	Engine switch off Engine switch on (ACC or IG)	Motor activated: Below 1 V Motor not activated: 11 to 14 V

NG: Go to step 4

Fig 1: Identifying Terminal IGE And GND Of E39 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See INITIALIZATION )

CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)

Disconnect the E39 connector from the steering lock actuator assembly.
Measure the resistance according to the value(s) in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Condition	Specified Condition
E39-1 (GND) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying Terminal GND Of E39 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - MAIN BODY ECU)

Disconnect the E50 connector from the main body ECU.
Measure the resistance according to the value(s) in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Condition	Specified Condition
E39-3 (IGE) - E50-7 (SLR+)	Always	Below 1 Ω
E39-3 (IGE) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 3: Identifying Steering Lock Actuator Assembly And Main Body ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE MAIN BODY ECU

INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Condition	Specified Condition
E39-3 (IGE) - E39-1 (GND)	The specified condition should be checked after performing the following: Move the shift lever to neutral Turn the engine switch off Open the driver's door	Motor activated: Below 1 V Motor not activated: 11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 4: Identifying Terminal IGE And GND Of E39 Connector

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - MAIN BODY ECU)

Disconnect the E39 connector from the steering lock actuator assembly.
Disconnect the E50 connector from the main body ECU.
Measure the resistance according to the value(s) in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Condition	Specified Condition
E39-3 (IGE) - E50-7 (SLR+)	Always	Below 1 Ω
E39-3 (IGE) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 5: Identifying Steering Lock Actuator Assembly And Main Body ECU Connector Terminals

OK: REPLACE MAIN BODY ECU