STEERING LOCK SYSTEM Unable to Lock Steering Wheel

DTC Code DTC Name
Unable to Lock Steering Wheel

DESCRIPTION

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

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 in the same manner as is done for a vehicle with a mechanical key to change the position of the lock hole.

WIRING DIAGRAM

C222516E11

INSPECTION PROCEDURE

Note:

  • When using the intelligent tester with the engine switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the intelligent tester and vehicle begins, or 2) connect the intelligent tester to the vehicle and select "MANUAL" from the initial screen on the intelligent tester, and then select "KEY REGIST" under Model Code.

  • 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) while the shift lever is in P.

    • To lock the steering, turn the engine 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).

  • Before replacing the steering lock actuator assembly (steering lock ECU), certification ECU or ID code box, refer to the Service Bulletin.

  • After completing repairs, confirm that the problem does not occur.

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

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

Tip:
Table 1. Related Data List and Active Test Items

Problem Symptom

Data List Item

Active Test Item

Unable to lock steering wheel

  • Main Body

  • FL Door Courtesy

-

PROCEDURE

  1. CHECK DTC (ALL)

    1. Using the intelligent tester, confirm the output of DTCs for all systems.

      OK

      No DTCs are output.

      Note:

      • When using the intelligent tester with the engine switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the intelligent tester and vehicle begins, or 2) connect the intelligent tester to the vehicle and select "MANUAL" from the initial screen on the intelligent tester, and then select "KEY REGIST" under Model Code.

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

        Click here

      Result

      Result

      OK

      NG

      Body Electrical > Entry&Start > Trouble Codes

    NG

    GO TO DTC CHART

    OK

  2. READ VALUE USING INTELLIGENT TESTER (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 command signal determined by certification ECU and sent to ID code box

      • HINT:

      • The reception state is maintained for 10 seconds.

      NG or OK

      OK: Within 10 seconds of opening any door with engine switch off and shift lever in P

      NG: Except above

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

      OK

      The certification ECU 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 intelligent tester screen.

      Result

      Result

      OK

      NG
    NG

    READ VALUE USING INTELLIGENT TESTER (FL DOOR COURTESY)Click here

    OK

  3. INSPECT STEERING LOCK ECU (IGE VOLTAGE)

    1. Disconnect the G23 steering lock ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G23-1 (GND) - Body ground

      Always

      Below 1 Ω

    3. Reconnect the G23 steering lock ECU connector.

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

    5. C222662C01

      *a

      Component with harness connected

      (Steering Lock ECU)

      *b

      Steering lock motor not operating

      *c

      Steering lock motor operating

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

      Table 2. Standard Frequency

      Item

      Content

      Tester Connection

      G23-3 (IGE) - G23-1 (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
      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) while the shift lever is in P.

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

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU)

    1. Disconnect the G39 power management control ECU connector.

    2. Disconnect the G23 steering lock ECU connector.

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

      OK

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G39-8 (SLR+) - G23-3 (IGE)

      Always

      Below 1 Ω

      G39-8 (SLR+) or G23-3 (IGE) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    OK

    REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. READ VALUE USING INTELLIGENT TESTER (FL DOOR COURTESY)

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

      Body Electrical > Main Body > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      FL Door Courtesy

      Front door courtesy switch LH

      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 side 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 side door.

      Result

      Result

      OK

      NG
    NG

    GO TO LIGHTING SYSTEM (DOOR COURTESY SWITCH CIRCUIT)

    Click here

    OK

  6. READ VALUE USING INTELLIGENT TESTER (SHIFT P SIGNAL)

    1. Use the Data List to check if the P shift lever position signal is functioning properly.

      Body Electrical > Power Source Control > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Shift P Signal

      Shift position (P)

      ON or OFF

      ON: Shift lever in P

      OFF: Shift lever not in P

      -

      OK

      ON (shift lever in P) or OFF (shift lever not in P) appears on the screen according to the shift lever position.

      Result

      Result

      OK

      NG
    NG

    INSPECT SHIFT LOCK CONTROL ECUClick here

    OK

  7. READ VALUE USING INTELLIGENT TESTER (IGNITION SWITCH)

    1. Use the Data List to check if the switch status signal is functioning properly.

      Body Electrical > Entry&Start > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Ignition Switch

      State of certification ECU IG power supply input

      ON or OFF

      ON: Engine switch on (IG)

      OFF: Engine switch off

      This item displays "OFF" when the engine switch is on (ACC).

      OK

      The Data List item changes according to the operation of the engine switch.

      Result

      Result

      OK

      NG
    NG

    CHECK CERTIFICATION ECUClick here

    OK

  8. READ VALUE USING INTELLIGENT TESTER (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 and ID code box

      NG or OK

      OK: Verification result normal

      NG: Verification result abnormal

      -

      OK

      OK is displayed on the intelligent tester.

      Tip:

      Reasons for verification failure:

      • The certification ECU or ID code box 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

      Result

      OK

      NG
    NG

    REPLACE CERTIFICATION ECUClick here

    OK

  9. READ VALUE USING INTELLIGENT TESTER (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 and steering lock actuator assembly

      NG or OK

      OK: Verification result normal

      NG: Verification result abnormal

      -

      OK

      OK is displayed on the intelligent tester.

      Tip:

      Reasons for verification failure:

      • The steering lock ECU or ID code box 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

      Result

      OK

      NG
    NG

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

    OK

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

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

      Click here

    2. Perform the registration procedures (Refer to Service Bulletin for registration).

    3. Turn the engine switch on (IG).

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

      OK

      Steering is unlocked.

      Result

      Result

      OK

      NG
    OK

    END

    NG

    REPLACE ID CODE BOX

  11. CHECK CERTIFICATION ECU

    1. Disconnect the G26 certification ECU connector.

    2. B199585C01

      *a

      Front view of wire harness connector

      (to Certification ECU)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G26-15 (E) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G26-16 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Engine switch off

      Below 1 V

      Result

      Result

      OK

      NG
    OK

    REPLACE CERTIFICATION ECU

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. REPLACE CERTIFICATION ECU

    1. Replace the certification ECU with a new one.

    2. Perform the registration procedures (Refer to Service Bulletin for registration).

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

      Body Electrical > Entry&Start > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      S Code Check

      Verification result between certification ECU and ID code box

      NG or OK

      OK: Verification result normal

      NG: Verification result abnormal

      -

      OK

      OK is displayed on the intelligent tester.

      Result

      Result

      OK

      NG
    OK

    END

    NG

    REPLACE ID CODE BOX

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

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

      Click here

    2. Perform the registration procedures (Refer to Service Bulletin for registration).

    3. 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 and steering lock actuator assembly

      NG or OK

      OK: Verification result normal

      NG: Verification result abnormal

      -

      OK

      OK is displayed on the intelligent tester.

      Result

      Result

      OK

      NG
    OK

    END

    NG

    REPLACE ID CODE BOX

  14. INSPECT SHIFT LOCK CONTROL ECU

    1. Disconnect the G32 shift lock control ECU connector.

    2. C206489C01

      *a

      Component without harness connected

      (Shift Lock Control ECU)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      11 (P2) - 3 (E)

      Shift lever in P

      10 kΩ or higher

      Shift lever not in P

      Below 1 Ω

      Result

      Result

      OK

      NG
    NG

    REPLACE SHIFT LOCK CONTROL ECU SUB-ASSEMBLY

    Click here

    OK

  15. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - SHIFT LOCK CONTROL ECU)

    1. Disconnect the G39 power management control ECU connector.

    2. Disconnect the G32 shift lock control ECU connector.

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

      OK

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G39-16 (P) - G32-11 (P2)

      Always

      Below 1 Ω

      G39-16 (P) or G32-11 (P2) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    OK

    REPLACE POWER MANAGEMENT CONTROL ECU

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR