STEERING LOCK SYSTEM DATA LIST / ACTIVE TEST


  1. READ DATA LIST

    Tech Tips

    Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    Note

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / (desired system) / Data List.

    6. According to the display on the GTS, read the Data List.

    7. Using the GTS, confirm the Data List items to help determine the cause of the problem.

      Note


      • The steering lock ECU (steering lock actuator assembly) communicates with the GTS through the certification ECU (smart key ECU assembly) which uses CAN communication. If the CAN communication system or certification ECU (smart key ECU assembly) is malfunctioning, Data List items may not be normal.

      • 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 / Enter&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.

      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 if the shift position switch is malfunctioning.

      • The engine cannot be started when this item is "OFF".
      Steering Unlock Switch State of steering unlock sensor signal output from steering lock actuator assembly / ON or OFF

      ON: Steering unlocked (Engine switch on (ACC))

      OFF: Steering locked (Engine switch off door opened)

      This item can be used to determine the cause of problems when the steering does not lock or unlock.

      Tech Tips


      • The steering is considered locked when the lock sensor is ON and the unlock sensor is OFF.

      • The steering is considered unlocked when the lock sensor is OFF and the unlock sensor is ON.
      Str Lock/Unlock Wait T-Out Steering lock or unlock malfunction / Yes or No

      Yes: Steering lock/unlock timed out (Lock bar stuck, etc.)

      No: Steering locks/unlocks normally within specified time

      		 The engine cannot be started when this item is "Yes".
      Enter&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Key Low Battery Transmitter battery depleted/No or Yes

      No: Transmitter battery not depleted

      Yes: Transmitter battery depleted

      		 The electrical key transmitter subassembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. The certification ECU (smart key ECU assembly) displays "Yes" for the "Key Low Battery" item of the Data List when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter subassembly is at room temperature (example: at -20°C (-4°F), "Yes" may be displayed even if the transmitter battery is new).
      Ignition Switch Certification ECU (smart key ECU assembly) IG power supply input status/ON or OFF

      ON: Engine switch on (IG)

      OFF: Engine switch off

      		 When the engine switch is on (ACC), OFF is displayed.
      #Codes Number of DTCs/0 to 255 - -
      Immobiliser Engine immobiliser system determined by certification ECU (smart key ECU assembly)/ Set or Unset

      Set: Engine immobiliser set (engine start prohibited) (engine switch off)

      Unset: Engine immobiliser unset (engine start permitted) (engine switch on (ACC) or on (IG))

      The engine cannot be started when Set is displayed.

      Tech Tips


      • The security indicator light blinks when Set is displayed.

      • The security indicator light is linked with set/unset of the immobiliser and not linked with steering lock/unlock.
      Steering Lock Sleep Cond Steering lock ECU sleep availability/Yes or No

      Yes: Sleep available

      No: Sleep not available

      		 -
      Steering Lock Start Cond Steering lock ECU wake up signal status/Yes or No

      Yes: Wake up signal sent

      No: Wake up signal not sent

      		 -
      Engine Start Condition Status of engine start permission signal determined by steering lock ECU (steering lock actuator assembly) and sent to certification ECU (smart key ECU assembly)/OK or NG

      OK: Engine start permitted

      NG: Engine start prohibited

      • When OK is displayed, the certification ECU (smart key ECU assembly) receives an unlock confirmation signal from the steering lock ECU (steering lock actuator assembly) and makes fuel injection and engine starting possible.

      • The engine cannot be started when NG is displayed.
      Sensor Value History of malfunction of position sensor in steering lock ECU (steering lock actuator assembly)/OK or NG(Past)

      OK: History of malfunction for the lock or unlock sensor in the steering lock ECU (steering lock actuator assembly) does not exist.

      NG(Past): History of both the lock and unlock sensors in the steering lock ECU (steering lock actuator assembly) being on exists (Under normal operation, neither sensor is on).

      		 When NG (Past) is displayed, either the position sensor in the steering lock ECU (steering lock actuator assembly) or the assembly itself may be malfunctioning.
      Power Supply Short History of signal error (short) sent from certification ECU (smart key ECU assembly) to steering lock ECU (steering lock actuator assembly)/OK or NG(Past)

      OK: History of motor power source short does not exist

      NG(Past): History of motor power source short exists

      		 This item displays history when a malfunction exists in the circuit between the certification ECU (smart key ECU assembly) and the steering lock ECU (steering lock actuator assembly).
      Motor Driver Short History of malfunction (short) in the steering lock ECU (steering lock actuator assembly) motor circuit (DTC B2781 is stored)/OK or NG(Past)

      OK: History of short in the motor circuit does not exist

      NG(Past): History of short in the motor circuit exists

      		 History of a malfunction in the steering lock motor circuit in the steering lock ECU (steering lock actuator assembly).
      Lock/Unlock Receive History of receiving an unlock request signal/Yes or No

      Yes: History of receiving an unlock request signal exists

      No: History of receiving an unlock request signal does not exist

      		 -
      Lock Bar Stuck Error History of the steering wheel not being able to unlock properly when the steering lock operates for a certain amount of time/OK or NG(Past)

      OK: History of steering lock being stuck does not exist

      NG(Past): History of steering lock being stuck exists

      		 -
      Engine Start Request Status of engine start permission signal determined by steering lock ECU (steering lock actuator assembly) and sent to certification ECU (smart key ECU assembly)/OK or NG

      OK: Signal received

      NG: Signal not received

      • When OK is displayed, the certification ECU (smart key ECU assembly) receives an unlock confirmation signal from the steering lock ECU (steering lock actuator assembly) and makes fuel injection and engine starting possible.

      • The engine cannot be started when NG is displayed.
      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).
      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 certification ECU (smart key ECU assembly) 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).
      Unlock Request Receive Unlock request signal received state/OK or NG

      OK: Within 10 sec. of turning the engine switch on (IG) or on (ACC), or of an engine start operation being performed

      NG: Engine switch on (IG) or on (ACC), or engine start operation not performed

      • The engine cannot be started when an unlock request signal cannot be received.

      • If OK is not displayed even though the steering unlock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.
      Lock Request Receive

      Lock request signal received state/OK or NG

      Tech Tips


      • The reception state is maintained for 10 seconds.

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

      OK: Lock request signal received for 10 sec. 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.
      S Code Check(Past) Verification result history between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU)/OK or NG(Past)

      OK: History of abnormal verification result does not exist

      NG(Past): History of abnormal verification result exists

      		 -
      L Code Check(Past) Verification result history between the ID code box (immobiliser code ECU) and steering lock ECU (steering lock actuator assembly)/OK or NG(Past)

      OK: History of abnormal verification result does not exist

      NG(Past): History of abnormal verification result exists

      		 -
      Steering Lock Steering lock ECU (steering lock actuator assembly) lock confirmation status/Set or Unset

      Set: Lock confirmed

      Unset: Lock not confirmed

      		 When Unset is displayed, the steering wheel is not locked.
      Steering Unlock Steering lock ECU (steering lock actuator assembly) unlock confirmation status/Set or Unset

      Set: Unlock confirmed

      Unset: Unlock not confirmed

      		 When Unset is displayed, the steering wheel is not locked (the engine cannot be started).
      Engine Start Indicator Key warning light / ON or OFF Customization status displayed -
      Open in IG2 History of IG2 input of the steering lock ECU (steering lock actuator assembly)/OK or NG(Past)

      OK: History of open in IG2 exists

      NG(Past): No history of open in IG2 exists

      		 When OK is displayed, the steering lock ECU (steering lock actuator assembly) has an IG2 input circuit malfunction.

      Tech Tips

      Unlock operation conditions for the steering lock:

      When the following condition is met, the unlock operation is performed:

      The engine switch is on (ACC) or on (IG).


      • When the engine switch is turned on (ACC) or on (IG) and the key and certification ECU (smart key ECU assembly) are verified, the steering is unlocked.

      When any of the following conditions are met, key verification is performed.


      • The brake pedal is depressed so that the engine can be started.

      • 30 seconds elapse after opening and closing a door.

      • The engine switch is pressed.

      Key verification occurs when the code emitted from the key and the code stored in the certification ECU (smart key ECU assembly) are compared to check that they match.

      Certification ECU (smart key ECU assembly) verification occurs when the S code and L code are verified while the engine is being started or the engine switch is being pushed. The ID code box (immobiliser code ECU) uses the S code to determine whether the certification ECU (smart key ECU assembly) is authorized. The steering lock ECU (steering lock actuator assembly) uses the L code to determine whether the ID code box (immobiliser code ECU) is authorized.

      Lock operation conditions for the steering:

      When the following conditions are met and the certification ECU (smart key ECU assembly) has been verified, the lock operation is performed.


      • The engine switch is off.

      • The shift lever is in P.

      • A door is opened or a door lock operation (smart door lock, wireless door lock or key-linked lock) is performed.

      Tech Tips

      The following example shows the behavior of various Data List items when the shift lever is in P, the brake pedal is not depressed, the vehicle is normal and the power source mode changes.

      A01WPSYE08

      Tech Tips

      Get into the vehicle while carrying the key. With the engine switch off, the shift lever in P and all the doors closed, perform the following procedures and check the power source mode.

      *1: Without depressing the brake pedal, press the engine switch and check that the power source mode changes to on (ACC).

      *2: Without depressing the brake pedal, press the engine switch and check that the power source mode changes to on (IG).

      *3: Press the engine switch and check that the power source mode changes off.

      *4: Release the brake pedal, open the driver door and check that the steering locks.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FL Door Courtesy SW Front door courtesy light switch assembly LH (for LHD) / 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 related part.
      FR Door Courtesy SW Front door courtesy light switch assembly RH (for RHD) / ON or OFF

      OFF: Front door RH closed

      ON: Front door RH 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 related part.