Steering Lock System Steering Lock Does Not Lock

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (LOCK REQUEST RECEIVE)

READ VALUE USING GTS (S CODE CHECK)

READ VALUE USING GTS (L CODE CHECK)

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

READ VALUE USING GTS (DOOR COURTESY SW)

READ VALUE USING GTS (SHIFT P SIGNAL)

READ VALUE USING GTS (STEERING LOCK)

READ VALUE USING GTS (LOCK REQUEST RECEIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus:
   Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
   
2. Perform either of the following operations to lock/unlock the steering:
   
1. To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG) with the shift lever in P.
   
2. To lock the steering, turn the engine switch off with the shift lever in P, and then open a door.
   
3. Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart (Click here).
   
4. The steering lock system uses LIN communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting (Click here).
   
5. When replacing the steering lock ECU (steering lock actuator assembly), certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), registration must be performed (refer to Service Bulletin).
   
6. After performing repairs, confirm that the problem does not occur.
   
7. Inspect the fuses for circuits related to this system before performing the following procedure.
   
8. When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected (Click here).
   

1. Use the Data List to check if the steering lock command is functioning properly.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Lock Request Receive	Reception state of steering lock request signal by certification ECU (smart key ECU assembly) and sent to ID code box (immobiliser code ECU) / OK or NG HINT: The reception state is maintained for 10 seconds. When 10 seconds or more elapse after receiving the signal, the item changes to "NG".	OK: Within 10 seconds of opening any door with engine switch off and shift lever in P NG: Except above	If this item does not change to "OK" even though the steering lock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.

   OK:

   The certification ECU (smart key ECU assembly) receives a lock request signal within 10 seconds of turning the engine switch from on (IG) to off and opening a door with the shift lever in P, and OK is displayed on the GTS screen.
   

1. Use the Data List to check if S code certification is functioning properly.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) / OK or NG	OK: Verification result normal NG: Verification result abnormal	When NG is displayed: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK:

   OK is displayed on the GTS.
   

   HINT:

   Reasons for verification failure:

   1. The certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning.
      
   2. There is a problem with the communication between ECUs.
      
   3. An ECU is replaced, but is not registered.
      
   4. An ECU is replaced with an ECU which has a code already stored in it.
      

1. Use the Data List to check if L code certification is functioning properly.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	Verification result between ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator assembly) / OK or NG	OK: Verification result normal NG: Verification result abnormal	When NG is displayed: The ID code for the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator assembly) is not registered or the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator assembly) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK:

   OK is displayed on the GTS.
   

   HINT:

   Reasons for verification failure:

   1. The steering lock ECU (steering lock actuator assembly) or ID code box (immobiliser code ECU) is malfunctioning.
      
   2. There is a problem with the communication between ECUs.
      
   3. An ECU is replaced, but is not registered.
      
   4. An ECU is replaced with an ECU which has a code already stored in it.
      

1. Make sure that there is no looseness at the locking part and the connecting part of the connector.
   

2. Disconnect the steering lock ECU (steering lock actuator assembly) connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E26-1 (GND) - Body ground	Always	Below 1 Ω

   NOTICE:

   If the result is not as specified, check for looseness in the ground cable connection.

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   E26-7 (B) - Body ground	Always	11 to 14 V

   Text in Illustration

   *a	Front view of wire harness connector (to Steering Lock ECU (Steering Lock Actuator Assembly))

1. Reconnect the steering lock ECU (steering lock actuator assembly) connector.
   

2. Turn the engine switch off, make sure that the steering is unlocked and move the shift lever to P.
   

3. Check the signal waveform according to the condition(s) in the table below.
   

   Standard Frequency

   Item	Content
   Tester Connection	E26-3 (IGE) - E26-1 (GND)
   Tool Setting	2 V/DIV., 200 ms./DIV.
   Vehicle Condition	Steering lock motor not operating → Steering lock motor operating → Steering lock motor not operating

   Text in Illustration

   *a	Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly))
   *b	Steering lock motor not operating
   *c	Steering lock motor operating

   HINT:

   1. When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
      
   2. In order to take measurements when the lock motor is operating, perform either of the following operations:
      
   1. To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG) with the shift lever in P.
      
   2. To lock the steering, turn the engine switch off with the shift lever in P, and then open a door.
      

   Result

   Result		Proceed to
   OK	for Manual Tilt and Manual Telescopic Steering Column	A
   	for Power Tilt and Power Telescopic Steering Column	B
   NG		C

1. Using the GTS, check the following main body ECU Data List item by opening and closing the driver door to confirm the state of the front door courtesy light switch assembly.
   
   

   Main Body

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FL Door Courtesy SW	Front door courtesy light switch assembly LH / ON or OFF	OFF: Front door LH closed ON: Front door LH open	If this item does not change according to the actual state of the driver door, there is a malfunction in the door courtesy light switch or a related part.

   OK:

   The Data List item changes in accordance with the opening and closing of the driver door.
   

1. Move the shift lever to P.
   

2. Read the Data List according to the display on the GTS.
   
   

   Power Source Control

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Shift P Signal	Shift position (P) signal / ON or OFF	ON: Shift lever in P OFF: Shift lever not in P	Use this item to determine whether the shift lever position switch (P) is malfunctioning.

   OK:

   ON is displayed on the GTS.
   

1. Check that the steering is unlocked.
   

2. Read the Data List according to the display on the GTS.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Steering Lock	Steering lock ECU (steering lock actuator assembly) unlock confirmation status / Unset or Set	Unset: Unlock not confirmed Set: Unlock confirmed	When Unset is displayed, the steering is not unlocked (the engine cannot be started).

   OK:

   Set is displayed on the GTS.
   

   Result

   Result		Proceed to
   OK		A
   NG	for Manual Tilt and Manual Telescopic Steering Column	B
   	for Power Tilt and Power Telescopic Steering Column	C

1. Replace the certification ECU (smart key ECU assembly) with a new one.
   

2. Perform registration (refer to Service Bulletin).
   

3. Turn the engine switch on (IG).
   

4. Use the Data List to check if the steering lock command is functioning properly.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Lock Request Receive	Lock request signal received state / OK or NG	OK: Lock request signal received for 10 seconds of any of the doors being opened with shift lever in P and engine switch off. NG: Except above	If OK is not displayed even though the steering lock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.

   OK:

   The certification ECU (smart key ECU assembly) receives a lock request signal within 10 seconds of turning the engine switch from on (IG) to on (ACC) or off and opening a door with the shift lever in P, and OK is displayed on the GTS screen.
   

1. Replace the certification ECU (smart key ECU assembly) with a new one.
   

2. Perform registration (refer to Service Bulletin).
   

3. Use the Data List to check if S code certification is functioning properly again.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   S Code Check	Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) / OK or NG	OK: Verification result normal NG: Verification result abnormal	When NG is displayed: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK:

   OK is displayed on the GTS.
   

1. Replace the steering lock ECU (steering lock actuator assembly) with a new one.
   

   HINT:

   1. for Manual tilt and telescopic steering column: Click here.
      
   2. for Power tilt and telescopic steering column: Click here.
      

2. Perform registration (refer to Service Bulletin).
   

3. Use the Data List to check if L code certification is functioning properly again.
   
   

   Entry&Start

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   L Code Check	Verification result between ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator assembly) / OK or NG	OK: Verification result normal NG: Verification result abnormal	When a malfunction is present: The ID code for the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator assembly) is not registered or the ID code box (immobiliser code ECU) or steering lock ECU (steering lock actuator assembly) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started).

   OK:

   OK is displayed on the GTS.
   

1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
   

2. Disconnect the E26 steering lock ECU (steering lock actuator assembly) connector.
   

3. Disconnect the E130 certification ECU (smart key ECU assembly) connector.
   

4. Check for deformation and corrosion of the connector case and terminals.
   

   OK:

   There is no deformation or corrosion of the connector case or terminals.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E26-3 (IGE) - E130-24 (SLR+)	Always	Below 1 Ω
   E26-3 (IGE) - Body ground	Always	10 kΩ or higher
   E130-24 (SLR+) - Body ground	Always	10 kΩ or higher

1. Reconnect the steering lock ECU (steering lock actuator assembly) connector.
   

2. Reconnect the certification ECU (smart key ECU assembly) connector.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   E26-3 (IGE) - Body ground	Always	11 to 14 V

   Text in Illustration

   *a	Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly))

   Result

   Result		Proceed to
   OK		A
   NG	for Manual Tilt and Manual Telescopic Steering Column	B
   	for Power Tilt and Power Telescopic Steering Column	C