STEERING LOCK SYSTEM Steering Lock does not Lock

DTC Code DTC Name
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.

Table 1. 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 (for RHD)

  • Steering Lock

  • L Code Check

-

WIRING DIAGRAM

C304869E02

CAUTION / NOTICE / HINT

Note:

  • When using the GTS with the engine 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 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 engine switch on (ACC) or on (IG).

    • To lock the steering, turn the engine switch off with the shift lever in N*, 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) (for RHD), 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 (-) battery terminal, some systems need to be initialized after the cable is reconnected.

    Click hereClick hereClick here

    • *: for Multi-Mode Manual Transaxle

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)*1

      • Reception state of steering lock request signal by certification ECU (smart key ECU assembly)*2

      Tip:

      • 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 engine switch off and shift lever in N*3

      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

      • *1: for RHD

      • *2: for LHD

      • *3: for Multi-Mode Manual Transaxle

      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 N (for Multi-Mode Manual Transaxle), and OK is displayed on the GTS screen.

    Result

    Result

    Proceed to

    OK (for RHD)

    A

    OK (for LHD)

    B

    NG

    C
    B

    READ VALUE USING GTS (L CODE CHECK)Click here

    C

    INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLYClick here

    A

  2. 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 engine cannot be started).

      Body Electrical > Entry&Start > Data List

      Tester Display

      S Code Check

      OK

      OK is displayed on the GTS.

      Tip:

      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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)Click here

    OK

  3. 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)*1

      • Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly)*2

      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.*1

      • The ID code for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is not registered or the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is malfunctioning.*2

      • The steering cannot be locked.

      • The steering cannot be unlocked (the engine cannot be started).

      Body Electrical > Entry&Start > Data List

      Tester Display

      L Code Check

      • *1: for RHD

      • *2: for LHD

      OK

      OK is displayed on the GTS.

      Tip:

      Reasons for verification failure:

      • The steering lock ECU (steering lock actuator assembly) or certification ECU (smart key ECU assembly) 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 STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

    1. Disconnect the E47 steering lock ECU (steering lock actuator assembly) connector.

    2. C157850C67

      *a

      Front view of wire harness connector

      (to Steering Lock ECU (Steering Lock Actuator Assembly))

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E47-1 (GND) - Body ground

      Always

      Below 1 Ω
      Note:

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      E47-7 (B) - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. Reconnect the E47 steering lock ECU (steering lock actuator assembly) connector.

    2. C241547C47

      *a

      Component with harness connected

      (Steering Lock ECU (Steering Lock Actuator Assembly))

      *b

      Steering lock motor not operating

      *c

      Steering lock motor operating

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

      Standard Frequency

      Item

      Content

      Tester Connection

      E47-3 (IGE) - E47-1 (GND)

      Tool Setting

      2 V/DIV., 200 ms./DIV.

      Vehicle Condition

      Steering lock motor notoperating → Operating → Not operating
      Tip:

      • When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.

      • In order to take measurements when the lock motor is operating, perform either of the following operations:

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

        • To lock the steering, turn the engine switch off with the shift lever in N*, and then open a door.

          • *: for Multi-Mode Manual Transaxle

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

    Click here

    NG

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

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

    2. Disconnect the E47 steering lock ECU (steering lock actuator assembly) connector.

    3. Disconnect the E49 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

      E47-3 (IGE) - E49-17 (SLR+)

      Always

      Below 1 Ω

      E47-3 (IGE) or E49-17 (SLR+) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. Reconnect the E47 steering lock ECU (steering lock actuator assembly) connector.

    2. Reconnect the E49 certification ECU (smart key ECU assembly) connector.

    3. C157849C34

      *a

      Component with harness connected

      (Steering Lock ECU (Steering Lock Actuator Assembly))

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      E47-3 (IGE) - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

    Click here

  8. 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 engine switch on (IG).

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

      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)*1

      • Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly)*2

      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.*1

      • The ID code for the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is not registered or the certification ECU (smart key ECU assembly) or steering lock ECU (steering lock actuator assembly) is malfunctioning.*2

      • The steering cannot be locked.

      • The steering cannot be unlocked (the engine cannot be started).

      Body Electrical > Entry&Start > Data List

      Tester Display

      L Code Check

      • *1: for RHD

      • *2: for LHD

      OK

      OK is displayed on the GTS.

    Result

    Result

    Proceed to

    OK

    A

    NG (for RHD)

    B

    NG (for LHD)

    C
    A

    END

    B

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    C

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  9. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    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.

      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 engine 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 ID CODE BOX (IMMOBILISER CODE ECU)

  10. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY

    1. Remove the front door courtesy light switch assembly.

      Click here

    2. Inspect the front door courtesy light switch assembly.

      Click here

      OK

      Front door courtesy light switch assembly is normal.

      Result

      Proceed to

      OK

      NG
    NG

    REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY

    Click here

    OK

  11. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

    1. Disconnect the K18 or K31 front door courtesy light switch assembly connector.

    2. Disconnect the 3L driver side junction block assembly connector.

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

      Standard Resistance

      Table 2. for LHD

      Tester Connection

      Condition

      Specified Condition

      K18-1 - 3L-2

      Always

      Below 1 Ω

      K18-1 or 3L-2 - Body ground

      Always

      10 kΩ or higher
      Table 3. for RHD

      Tester Connection

      Condition

      Specified Condition

      K31-1 - 3L-2

      Always

      Below 1 Ω

      K31-1 or 3L-2 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

    1. Remove the driver side junction block assembly.

      Click here

    2. Remove the body ECU from the driver side junction block assembly.

      Click here

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

      B371197C04

      *a

      Component with harness connected

      (Driver Side Junction Block Assembly)

      -

      -

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3L-2 - MB-18 (DCTY)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

    Click here

    OK

  13. REPLACE BODY ECU

    1. Replace the body ECU with a new one.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  14. CHECK STEERING LOCK CONDITION

    1. The engine switch is off.

    2. The shift lever is in N*1.

    3. A door is opened or a door lock operation (door lock, wireless door lock or key-linked lock operation*2) is performed.

      Tip:

      • *1: for Multi-Mode Manual Transaxle

      • *2: This is the lock/unlock operation with the mechanical key.

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

      OK

      Steering is locked.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

  15. READ VALUE USING GTS (STEERING LOCK)

    1. Check that the steering is unlocked.

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

      Body Electrical > Entry&Start > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Steering Lock

      State of whether steering lock ECU (steering lock actuator assembly) determined steering is locked

      Set or Unset

      Set: Steering locked

      Unset: Steering unlocked

      If this item displays "Unset", the steering does not lock.

      Body Electrical > Entry&Start > Data List

      Tester Display

      Steering Lock

      OK

      Set is displayed on the GTS.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

    Click here

    OK

  16. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

    2. Perform registration (refer to Service Bulletin).

    Result

    Proceed to

    NEXT
    NEXT

  17. 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)*1

      • Reception state of steering lock request signal by certification ECU (smart key ECU assembly)*2

      Tip:

      • 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 engine switch off and shift lever in N*3

      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

      • *1: for RHD

      • *2: for LHD

      • *3: for Multi-Mode Manual Transaxle

      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 N (for Multi-Mode Manual Transaxle), and OK is displayed on the GTS screen.

    Result

    Result

    Proceed to

    OK

    A

    NG (for RHD)

    B

    NG (for LHD)

    C
    A

    END

    B

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    C

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

    Click here