Steering Lock Motor Drive Power Circuit: Procedure

1. Check for DTCs.Refer to DTC CHECK / CLEAR .

   OK

   DTC output does not occur.

NG → See step   10 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Select the item "Lock/Unlock Receive" in the Data List within 10 seconds of starting the engine and read the value displayed on the Techstream.
   SMART KEY
   
   

   Item	Measurement Item / Range	Normal Condition	Diagnostic Note
   Lock/Unlock Receive	Steering lock command reception record / Yes or No	Yes: Steering lock/unlock signal received No: Steering lock/unlock signal not received	-

   OK

   Yes is displayed on the Techstream screen.

NG → See step   5 

OK: Go to next step 

Fig 1: Identifying Steering Lock ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance 

   Standard Voltage 

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

   Tester Connection	Condition	Specified Condition
   7 (B) - 1 (GND)	Always	11 to 14 V
   7 (B) - 2 (SGND)	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 2: Identifying Steering Lock ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Immediately after turning the engine switch on (IG), inspect the voltage between terminals 3 (IGE) and 2 (SGND) of the steering lock ECU.
   RESULT
   
   

   Result	Proceed to
   Immediately after turning engine switch on (IG), measurement is below 1 V.	A
   Measurement is 11 to 14 V, and measurement never becomes below 1 V.	B

B → REPAIR OR REPLACE HARNESS OR CONNECTOR 

A → See step   14 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Select the item "S Code Check" in the Data List and read the value displayed on the Techstream.
   SMART KEY
   
   

   Item	Measurement Item / Range	Normal Condition	Diagnostic Note
   S Code Check	S code match record / NG or OK	NG: S code not matched OK: S code matched	-

   RESULT
   
   

   Result	Proceed to
   NG is displayed on the Techstream screen.	A
   OK is displayed on the Techstream screen.	B

B → See step   7 

A: Go to next step 

1. Replace the ID code box with a new one.Refer to REMOVAL .
   NOTE:

   When replacing the ID code box, registration must be performed according to the "Registration" procedures.Refer to REGISTRATION .

2. Reconfirm the item "S Code Check" in the Data List and read the value displayed on the Techstream.
   SMART KEY
   
   

   Item	Measurement Item / Range	Normal Condition	Diagnostic Note
   S Code Check	S code match record / NG or OK	NG: S code not matched OK: S code matched	-

   RESULT
   
   

   Result	Proceed to
   NG is displayed on the Techstream screen.	A
   OK is displayed on the Techstream screen.	B

B → See step   11 

A → See step   15 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Select the item "L Code Check" in the Data List and read the value displayed on the Techstream.
   SMART KEY
   
   

   Item	Measurement Item / Range	Normal Condition	Diagnostic Note
   L Code Check	L code match record / NG or OK	NG: L code not matched OK: L code matched	-

   RESULT
   
   

   Result	Proceed to
   NG is displayed on the Techstream screen.	A
   OK is displayed on the Techstream screen.	B

B → See step   9 

A: Go to next step 

1. Replace the ID code box with a new one.Refer to REMOVAL .
   NOTE:

   When replacing the ID code box, registration must be performed according to the "Registration" procedures.Refer to REGISTRATION .

2. Reconfirm the item "L Code Check" in the Data List and read the value displayed on the Techstream.
   SMART KEY
   
   

   Item	Measurement Item / Range	Normal Condition	Diagnostic Note
   L Code Check	L code match record / NG or OK	NG: L code not matched OK: L code matched	-

   RESULT
   
   

   Result	Proceed to
   NG is displayed on the Techstream screen.	A
   OK is displayed on the Techstream screen.	B

B → See step   12 

A: Go to next step 

1. Replace the steering lock ECU with a new one.Refer to REMOVAL .
   NOTE:

   When replacing the steering lock ECU, registration must be performed according to the "Registration" procedures.Refer to REGISTRATION .

2. Turn the engine switch on (IG).
3. Check the steering lock.

   OK

   Steering lock is released and engine starts.

NG → See step   16 

OK → See step   13