STEERING LOCK SYSTEM Steering Lock does not Lock

DESCRIPTION

The steering lock actuator assembly activates the steering lock motor and moves the lock bar into the steering column to lock the steering.

When the steering lock is operating, the steering may not lock when the lock bar is not aligned with the lock hole of the steering column. In this case, the steering can be locked by turning the steering wheel a little, as is done for a vehicle with a mechanical key, to change the position of the lock hole.

Related Data List and Active Test Items
Problem Symptom Data List Item Active Test Item
Steering Lock does not Lock

    Entry&Start

  • Lock Request Receive

  • S Code Check

  • L Code Check


    Main Body

  • FR Door Courtesy SW (for RHD)

  • FL Door Courtesy SW (for LHD)

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WIRING DIAGRAM

A01MT33E03

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, connect the GTS to the vehicle 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 Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). 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.

  • Perform either of the following operations to lock/unlock the steering:


    • To unlock the steering, carry the key and turn the power switch on (ACC) or on (IG).

    • To lock the steering, turn the power switch off with the shift lever in P, and then open a door.

  • Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart.

    Click here

  • 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

  • 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).

  • After performing repairs, confirm that the problem does not recur.

  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • When disconnecting the cable from the negative (-) auxiliary battery terminal, some systems need to be initialized after the cable is reconnected.

    Click here

PROCEDURE


  1. READ VALUE USING GTS (LOCK REQUEST RECEIVE)


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


      Body Electrical > Entry&Start > Data List
      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) sent to ID code box (immobiliser code ECU)

      Tech Tips


      • The reception state is maintained for 10 seconds.

      • When 10 seconds or more elapsed after receiving the signal, the item changes to "NG".

      		 OK or NG

      OK: Within 10 seconds of opening any door with power 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.

      Body Electrical > Entry&Start > Data List
      Tester Display
      Lock Request Receive
      OK
      The certification ECU (smart key ECU assembly) receives a lock request signal within 10 seconds of turning the power switch from on (IG) to off and opening a door with the shift lever in P, and OK is displayed on the GTS screen.
      Result
      Proceed to
      OK
      NG

    NG

    READ VALUE USING GTS (DOOR COURTESY SW) Click here

    OK

  2. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) (MOTOR ACTIVATION COMMAND SIGNAL)

    Tech Tips

    Click here

    Result
    Proceed to
    OK
    NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY))

    Tech Tips

    Click here

    Result
    Proceed to
    OK
    NG

    OK

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. READ VALUE USING GTS (DOOR COURTESY SW)


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


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Door Courtesy SW Front door courtesy light switch assembly RH (for RHD) ON or OFF

      ON: Front door RH open

      OFF: Front door RH closed

      		 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.
      FL Door Courtesy SW Front door courtesy light switch assembly LH (for LHD) ON or OFF

      ON: Front door LH open

      OFF: Front door LH closed

      		 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.

      Body Electrical > Main Body > Data List
      Tester Display
      FR Door Courtesy SW
      FL Door Courtesy SW
      OK
      The Data List item changes in accordance with the opening and closing of the driver door.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO LIGHTING SYSTEM (FRONT DOOR COURTESY SWITCH CIRCUIT) Click here

    OK

  5. READ VALUE USING GTS (S CODE CHECK)


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


      Body Electrical > Entry&Start > Data List
      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 a malfunction is present:


      • 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 hybrid control system cannot be started).

      Body Electrical > Entry&Start > Data List
      Tester Display
      S Code Check
      OK
      OK is displayed on the GTS.

      Tech Tips

      Reasons for verification failure:


      • The certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning.

      • There is a problem with the communication between ECUs.

      • An ECU is replaced, but is not registered.

      • An ECU is replaced with an ECU which has a code already stored in it.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Click here

    OK

  6. READ VALUE USING GTS (L CODE CHECK)


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


      Body Electrical > Entry&Start > Data List
      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 hybrid control system cannot be started).

      Body Electrical > Entry&Start > Data List
      Tester Display
      L Code Check
      OK
      OK is displayed on the GTS.

      Tech Tips

      Reasons for verification failure:


      • The steering lock ECU (steering lock actuator assembly) or ID code box (immobiliser code ECU) is malfunctioning.

      • There is a problem with the communication between ECUs.

      • An ECU is replaced, but is not registered.

      • An ECU is replaced with an ECU which has a code already stored in it.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Click here

    OK

  7. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)


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

      Click here

    2. Perform registration (refer to Service Bulletin).

    3. Turn the power switch on (IG).

    4. Turn the steering wheel and check the steering condition.

      OK
      Steering is unlocked.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  8. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)


    1. Replace the ID code box (immobiliser code ECU) with a new one.

    2. Perform registration (refer to Service Bulletin).

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


      Body Electrical > Entry&Start > Data List
      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 hybrid control system cannot be started).

      Body Electrical > Entry&Start > Data List
      Tester Display
      L Code Check
      OK
      OK is displayed on the GTS.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here

  9. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)


    1. Replace the ID code box (immobiliser code ECU) 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.


      Body Electrical > Entry&Start > Data List
      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 a malfunction is present:


      • 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 hybrid control system cannot be started).

      Body Electrical > Entry&Start > Data List
      Tester Display
      S Code Check
      OK
      OK is displayed on the GTS.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)