STEERING LOCK SYSTEM DATA LIST / ACTIVE TEST


  1. READ DATA LIST

    Tech Tips

    Using the intelligent tester 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 intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the intelligent tester on.

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

    6. According to the display on the intelligent tester, read the Data List.

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

      Note


      • The steering lock ECU communicates with the intelligent tester 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 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. Select "Key Code Registration" under model code.

      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".
      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Ignition Switch State of certification ECU (smart key ECU assembly) 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).
      #Codes Number of DTCs / 0 to 255 Number of stored DTCs displayed -
      Immobiliser*1 State of immobiliser system determined by certification ECU (smart key ECU assembly) / Set or Unset

      Set: Engine immobiliser set (Engine switch off)

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

      • When the immobiliser cannot be unset, this item can be used to determine whether the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is part of the problem.

      • The engine cannot be started when this item displays "Set".

      Tech Tips


      • The state of the immobiliser (whether it is set or unset) can be determined through the certification ECU (smart key ECU assembly). If this item displays "Set", the communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) can be determined to be normal.

      • The security indicator light operation is only linked with the state of the immobiliser (set/unset), and is not related to the steering lock operation (lock/unlock), when the immobiliser is set, the security indicator light blinks.
      Immobiliser*2 State of immobiliser system determined by certification ECU (smart key ECU assembly) / Set or Unset

      Set: Engine immobiliser set (Engine switch off)

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

      • When the immobiliser cannot be unset, this item can be used to determine whether the certification ECU (smart key ECU assembly) is part of the problem.

      • The engine cannot be started when this item displays "Set".

      Tech Tips


      • The state of the immobiliser (whether it is set or unset) can be determined through the certification ECU (smart key ECU assembly). If this item displays "Set", the communication between the certification ECU (smart key ECU assembly) and steering lock ECU can be determined to be normal.

      • The security indicator light operation is only linked with the state of the immobiliser (set/unset), and is not related to the steering lock operation (lock/unlock), when the immobiliser is set, the security indicator light blinks.
      Steering Lock Sleep Cond Steering lock ECU sleep condition / Yes or No - -
      Steering Lock Start Cond Transmission state of steering lock ECU wake up signal / Yes or No

      Yes: Wake up signal transmitted

      No: Wake up signal not transmitted

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

      OK: Engine start permitted

      NG: Engine start prohibited

      • When this item displays "OK", the certification ECU (smart key ECU assembly) has received an unlock confirmation signal from the steering lock ECU and has permitted fuel injection and engine combustion.

      • The engine cannot be started when this item displays "NG".
      Sensor Value Record of malfunction of position sensor in steering lock actuator assembly / OK or NG(Past)

      OK: No record of lock/unlock sensor malfunction in steering lock actuator assembly

      NG(Past): Record of lock/unlock sensor in steering lock actuator assembly turning ON at same time exists

      		 When this item displays "NG", the sensor inside the steering lock actuator assembly may be malfunctioning, or there may be a mechanical malfunction.
      Power Supply Short Record of malfunction of signal sent to steering lock motor (steering lock actuator assembly) from certification ECU (smart key ECU assembly) (short circuit) / OK or NG(Past)

      OK: No record of malfunction (short circuit)

      NG(Past): Record of malfunction (short circuit) exists

      		 This item records malfunctions in the circuit between the certification ECU (smart key ECU assembly) and steering lock motor (steering lock actuator assembly).
      Motor Driver Short Record of malfunction of motor activation circuit in steering lock actuator assembly (short circuit) (DTC B2781 stored) / OK or NG(Past)

      OK: No record of malfunction (short circuit)

      NG(Past): Record of malfunction (short circuit) exists

      		 This item records malfunctions in the motor activation circuit inside the steering lock actuator assembly (short circuit).
      Lock/Unlock Receive Reception state of steering lock or unlock request signal from certification ECU (smart key ECU assembly) / Yes or No

      Yes: Record of receiving lock or unlock request signal exists

      No: No record of receiving lock or unlock request signal

      		 -
      Lock Bar Stuck Error Record of lock bar not properly unlocking after being commanded to unlock for certain amount of time / OK or NG(Past)

      OK: No record of stuck lock bar

      NG(Past): Record of stuck lock bar exists

      		 -
      Push Start Error Record of malfunction of push-start function due to steering lock actuator assembly / OK or NG(Past)

      OK: No record of push-start function malfunction

      NG(Past): Record push-start function malfunction exists

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

      OK: Receiving signal

      NG: Not receiving signal

      • When this item displays "OK", the certification ECU (smart key ECU assembly) has received an unlock confirmation signal from the steering lock ECU and has permitted fuel injection and engine combustion.

      • The engine cannot be started when this item displays "NG".
      S Code Check*1 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).
      L Code Check*1 Verification result between ID code box (immobiliser code ECU) and steering lock ECU / 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 is not registered or the ID code box (immobiliser code ECU) or steering lock ECU is malfunctioning.

      • The steering cannot be locked.

      • The steering cannot be unlocked (the engine cannot be started).
      L Code Check*2 Verification result between certification ECU (smart key ECU assembly) and steering lock 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 steering lock ECU is not registered or the certification ECU (smart key ECU assembly) or steering lock ECU is malfunctioning.

      • The steering cannot be locked.

      • The steering cannot be unlocked (the engine cannot be started).
      Unlock Request Receive*1

      Reception state of steering unlock request signal by certification ECU (smart key ECU assembly) and sent to ID code box (immobiliser code ECU) / 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: Within 10 seconds of turning engine switch on (IG) or on (ACC) or starting engine

      NG: Except above

      • If the unlock signal has not been received, the engine cannot be started.

      • If this item does not change to "OK" even though the steering unlock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.
      Unlock Request Receive*2

      Reception state of steering unlock request signal by certification ECU (smart key ECU assembly) / 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: Within 10 seconds of turning engine switch on (IG) or on (ACC) or starting engine

      NG: Except above

      • If the unlock signal has not been received, the engine cannot be started.

      • If this item does not change to "OK" even though the steering unlock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning.
      Lock Request Receive*1

      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

      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: 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.
      Lock Request Receive*2

      Reception state of steering lock request signal by certification ECU (smart key ECU assembly) / 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: 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.
      S Code Check(Past)*1 Verification result between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) (Past) / OK or NG(Past)

      OK: Verification result normal

      NG(Past): Verification result abnormal (Past)

      		 -
      L Code Check(Past)*1 Verification result between ID code box (immobiliser code ECU) and steering lock ECU (Past) / OK or NG(Past)

      OK: Verification result normal

      NG(Past): Verification result abnormal (Past)

      		 -
      L Code Check(Past)*2 Verification result between certification ECU (smart key ECU assembly) and steering lock ECU (Past) / OK or NG(Past)

      OK: Verification result normal

      NG(Past): Verification result abnormal (Past)

      		 -
      Steering Lock State of whether steering lock ECU has determined steering is locked / Set or Unset

      Set: Steering locked

      Unset: Steering unlocked

      		 If this item displays "Unset", the steering does not lock.
      Steering Unlock State of whether steering lock ECU determined steering is unlocked / Set or Unset

      Set: Steering unlocked

      Unset: Steering locked

      		 If this item displays "Unset", the steering does not unlock (engine cannot be started).

      *1: w/o wireless door lock buzzer answer back function

      *2: w/ wireless door lock buzzer answer back function

      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 uses the L code to determine whether the ID code box (immobiliser code ECU) is authorized.*1

      Certification ECU (smart key ECU assembly) verification occurs when the L code is verified while the engine is being started or the engine switch is being pushed. The steering lock ECU uses the L code to determine whether the certification ECU (smart key ECU assembly) is authorized.*2

      *1: w/o wireless door lock buzzer answer back function

      *2: w/ wireless door lock buzzer answer back function

      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.

      A01EX9VE03

      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.

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

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

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

      *6: 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
      FR Door Courtesy*7 Front door courtesy light switch assembly RH / CLOSE or OPEN

      CLOSE: Front door RH closed

      OPEN: 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.
      FL Door Courtesy*8 Front door courtesy light switch assembly LH / CLOSE or OPEN

      CLOSE: Front door LH closed

      OPEN: 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.

      *7: for RHD

      *8: for LHD