Steering Lock System (diagnostics - Introduction) Toyota Prius C I

PRECAUTION

1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTE: When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following system(s) after the cable is reconnected: System See Procedure Power Door Lock Control System Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction__initialization)
2. PRECAUTIONS WHEN CHECKING FOR DTCS When the cable is disconnected from the negative (-) auxiliary battery terminal, the DTCs stored in the steering lock ECU are cleared. Be sure to record any output DTCs immediately. Normally, with the power switch off, even if the Techstream is connected to the vehicle, the information stored in the smart key system related ECUs (the certification ECU (smart key ECU assembly), main body ECU, etc.) cannot be read. However, smart key system DTCs and Data List information can be confirmed even if the power switch is off using either of the two methods below: Connect the Techstream to the vehicle, and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins (the Techstream screen changes when communication begins). Connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Trouble Codes.
3. PRECAUTIONS WHEN REPLACING STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) If the steering lock ECU (steering lock actuator assembly) is replaced, be sure to confirm that the steering is unlocked by turning the steering wheel to the left and right before starting the hybrid control system. If the steering is locked for any reason, open and close a door with the power switch off, and then unlock the steering lock by pressing the power switch. This prevents the hybrid control system from starting while the steering is locked.
4. PRECAUTION FOR REGISTRATION If replacing any of the following parts, refer to the registration procedures. Refer to «REGISTRATION»(/toyota/prius-c/i-2011-2015/remont/door-locks-anti-theft-systems/#engine-immobiliser-with-smart-key-system-diagnostics-introduction) . Certification ECU (Smart key ECU assembly) ID code box (Immobiliser code ECU) Power management control ECU Steering lock ECU (Steering lock actuator assembly) Electrical key transmitter sub-assembly (Key)

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CIRCUIT DESCRIPTION

SYSTEM DESCRIPTION

1. UNLOCK OPERATION CONDITIONS FOR STEERING LOCK When the following condition is met, the unlock operation is performed. The power switch is on (ACC) or on (IG). HINT: When the power 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 power switch is pressed. The brake pedal is depressed so that the hybrid control system can be started. 30 seconds elapse after opening and closing a door. HINT: Key verification occurs when the code emitted from the key and the code stored by 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 hybrid control system is being started or the power 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.
2. LOCK OPERATION CONDITIONS FOR STEERING LOCK When all of the following conditions are met and the certification ECU (smart key ECU assembly) has been verified, the lock operation is performed. The power 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 operation*) is performed. HINT: *: This is the lock/unlock operation with the mechanical key.
3. WARNING FUNCTION A warning message is displayed on the multi-information display in the combination meter assembly when one of the following occurs: 1) A vehicle speed signal malfunction is detected, 2) a malfunction that interferes with steering lock ECU operation is detected, or 3) an IG circuit malfunction is detected. If a malfunction which results in the message being displayed, the hybrid control system cannot be started once it is turned off. HINT: DTCs are stored in all cases listed above.
4. STEERING LOCK ECU DESCRIPTION The steering lock ECU is built into the steering lock actuator assembly of the steering column assembly. The steering lock ECU is not connected to the CAN communication system. However, the steering lock ECU is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use the following procedures to troubleshoot the steering lock system.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS Interview the customer and confirm the problem. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) . NEXT: Go to next step
3. CHECK AUXILIARY BATTERY VOLTAGE Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step. HINT: A simple method to determine whether the auxiliary battery is depleted is to operate the horn. NEXT: Go to next step
4. CHECK DTC* Check for DTCs and make a note of any codes that are output. Refer to «DTC CHECK / CLEAR»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-lock-system-diagnostics-introduction__dtc-check-clear) . HINT: When DTCs indicating CAN and/or LIN communication system malfunctions are output, repair the CAN and/or LIN communication systems before performing diagnosis. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/communication-devices/#can-communication-system-diagnostics-introduction) for CAN and/or. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/communication-devices/#lin-communication-system-diagnostics-introduction__how-to-proceed-with-troubleshooting) for LIN). Result Result Proceed to DTC is not output. (Problem symptom cannot be confirmed or reproduced.) A DTC is not output. (Problem symptom can be confirmed and reproduced.) B Steering lock system DTC is output. C HINT: When steering lock system DTCs are output, refer to Diagnostic Trouble Code Chart. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-lock-system-diagnostics-introduction__diagnostic-trouble-code-chart) . The steering lock system does not store past DTCs. B --> Go to step 6 C --> Go to step 8 A: Go to next step
5. SYMPTOM SIMULATION Proceed to How to Proceed with Troubleshooting. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) . NEXT: Go to next step
6. PROBLEM SYMPTOMS TABLE Proceed to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-lock-system-diagnostics-introduction__problem-symptoms-table) . Result Result Proceed to Fault is not listed in Problem Symptoms Table. A Fault is listed in Problem Symptoms Table. B B --> Go to step 8 A: Go to next step
7. OVERALL ANALYSIS AND TROUBLESHOOTING* Proceed to Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-lock-system-diagnostics-introduction) . Proceed to Terminals of ECU. Refer to «TERMINALS OF ECU»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-lock-system-diagnostics-introduction) . NEXT --> Go to step 9
8. CIRCUIT INSPECTION* NEXT: Go to next step
9. REPAIR OR REPLACE NEXT: Go to next step
10. CHECK DTC AGAIN* Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-lock-system-diagnostics-introduction__dtc-check-clear) . Check for DTCs and make a note of any codes that are output. Refer to «DTC CHECK / CLEAR»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-lock-system-diagnostics-introduction__dtc-check-clear) . HINT: Perform the DTC output confirmation operation. Result Result Proceed to DTC is not output. A Steering lock system DTC is output. B B --> GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-c/i-2011-2015/remont/steering-column/#steering-lock-system-diagnostics-introduction__diagnostic-trouble-code-chart) A --> END

PROBLEM SYMPTOMS TABLE

HINT

1. Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

STEERING LOCK SYSTEM

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1. TERMINAL INSPECTION *a Component without harness connected (Steering Lock ECU (Steering Lock Actuator Assembly)) - - Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item G50-1 (GND) - Body ground - W-B - Body ground Ground* Always Below 1 ohms - G50-3 (IGE) - G50-1 (GND) Input L - W-B Steering lock motor activation command signal (motor activation command signal sent from certification ECU (smart key ECU assembly)) Any door opened when conditions below met, and then steering lock motor activated: Shift lever in P Steering lock unlocked in advance by carrying key and turning power switch on (IG) After above conditions met, power switch turned off Pulse generation (see waveform) Smart Key Power Supply Short Unlock Request Receive Lock Request Receive G50-4 (SLP1) - G50-1 (GND) Output P - W-B Steering lock bar position signal (output signal from steering unlock sensor) Steering locked --> unlocked 11 to 14 V --> Below 1.2 V Smart Key Push Start Error Sensor Value G50-5 (LIN) - G50-1 (GND) Input/Output LG - W-B LIN communication line - - Smart Key Steering Lock Start Cond G50-6 (IG2) - G50-1 (GND) Input SB - W-B Power source mode signal (IG2 power supply input for entire steering lock actuator assembly)* Power switch off --> power switch on (IG) Below 1 V --> 11 to 14 V Smart Key Ignition Switch G50-7 (B) - Body ground Input GR - Body ground Power source* Always 11 to 14 V - *: When there is a problem with the power source input, the certification ECU (smart key ECU assembly) may store DTC B2786. NOTE: There are 1 motor and 2 sensors built into the steering lock actuator assembly. HINT: When taking measurements while 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 power switch on (ACC) or on (IG) with the shift lever in P. To lock the steering, turn the power switch off with the shift lever in P, and then open a door. Waveform Item Content Tester Connection G50-3 (IGE) - G50-1 (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 TEXT IN ILLUSTRATION *a Steering lock motor not operating *b Steering lock motor operating

DIAGNOSIS SYSTEM

1. DESCRIPTION The steering lock ECU stores DTCs when a malfunction occurs in the system. These DTCs can be confirmed by using the Techstream. NOTE: When using the Techstream with the power switch off to confirm DTCs or Data List information related to the smart key system, the Techstream may not operate unless either of the following is performed: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Trouble Codes. Do not remove any fuses or disconnect the cable from the negative (-) auxiliary battery terminal before confirming and recording DTCs as the data stored in the ECUs will be cleared. DTCs may have been stored due to problems unrelated to the steering lock system. Be sure to confirm and record any DTCs output for other systems. The steering lock ECU is not connected to the CAN communication system. Therefore, communication with the Techstream is performed via the certification ECU (smart key ECU assembly). The steering lock ECU only stores DTCs for currently existing malfunctions. Past DTCs are not stored.

DTC CHECK / CLEAR

Note. The steering lock ECU does not store past DTCs. If any DTCs are output, confirm and record them as soon as possible. Do not turn the power switch off or clear the DTCs until the DTCs are confirmed and recorded. DTCs may have been stored due to problems unrelated to the steering lock system. Be sure to confirm and record any DTCs output for other systems. When using the Techstream with the power 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 Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Trouble Codes.

1. CHECK FOR DTC (POWER MANAGEMENT CONTROL ECU) Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Trouble Codes. Check for DTCs.
2. CHECK FOR DTC (MAIN BODY ECU) Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Trouble Codes. Check for DTCs.
3. CHECK FOR DTC (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) HINT: The steering lock system DTCs are output from the steering lock ECU via the certification ECU (smart key ECU assembly). Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Key / Trouble Codes. Check for DTCs.
4. CLEAR DTC (POWER MANAGEMENT CONTROL ECU) Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Trouble Codes. Clear the DTCs.
5. CLEAR DTC (MAIN BODY ECU) Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Trouble Codes. Clear the DTCs.
6. CLEAR DTC (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Key / Trouble Codes. Clear the DTCs.

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1. READ DATA LIST HINT: Using the Techstream 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. Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Data List. According to the display on the Techstream, read the Data List. Using the Techstream, confirm the Data List items to help determine the cause of the problem. NOTE: The steering lock ECU communicates with the Techstream 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 Techstream with the power 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 Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Data List. 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 hybrid control system 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 (Power switch on (ACC)) OFF: Steering locked (Power switch off door opened) This item can be used to determine the cause of problems when the steering does not lock or unlock. HINT: 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 hybrid control system cannot be started when this item is "Yes". SMART KEY 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: Power switch on (IG) OFF: Power switch off This item displays "OFF" when the power switch is on (ACC). #Codes Number of DTCs / 0 to 255 Number of stored DTCs displayed - Immobiliser State of immobiliser system determined by certification ECU (smart key ECU assembly) / Set or Unset Set: Engine immobiliser set (Power switch off) Unset: Engine immobiliser unset (Power 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 hybrid control system cannot be started when this item displays "Set". HINT: 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. 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 hybrid control system permission signal determined by steering lock ECU and sent to certification ECU (smart key ECU assembly) / OK or NG OK: Hybrid control system permitted NG: Hybrid control system 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 hybrid control system combustion. The hybrid control system 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 power management control ECU (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 power management control ECU 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 hybrid control system 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 hybrid control system combustion. The hybrid control system cannot be started when this item displays "NG". 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). L Code Check 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 hybrid control system cannot be started). Unlock Request Receive 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 HINT: 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 power switch on (IG) or on (ACC) or starting hybrid control system NG: Except above If the unlock signal has not been received, the hybrid control system 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 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 HINT: 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 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. S Code Check(Past) 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) 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) - 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 (hybrid control system cannot be started). HINT: Unlock operation conditions for the steering lock: When the following condition is met, the unlock operation is performed: The power switch is on (ACC) or on (IG). When the power 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 hybrid control system can be started. 30 seconds elapse after opening and closing a door. The power 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 hybrid control system is being started or the power 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. 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 power 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. HINT: 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. HINT: Get into the vehicle while carrying the key. With the power 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 power switch and check that the power source mode changes to on (ACC). *2: Without depressing the brake pedal, press the power switch and check that the power source mode changes to on (IG). *3: Press the power 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 / ON or OFF ON: Front door LH closed OFF: 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.
2. ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests. Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Active Test. According to the display on the Techstream, perform the Active Test. POWER SOURCE CONTROL Tester Display Test Part Control Range Diagnostic Note P Supply for Steering Lock Power management control ECU ON/OFF HINT: ON: Power is supplied OFF: Power is not supplied When performing this Active Test, make sure the following condition is met: The power switch is on (IG).

DIAGNOSTIC TROUBLE CODE CHART

HINT

If a trouble code is output during the DTC check, refer to the "See information" below.

STEERING LOCK SYSTEM

See also:
• INITIALIZATION
• REGISTRATION
• HOW TO PROCEED WITH TROUBLESHOOTING
• HOW TO PROCEED WITH TROUBLESHOOTING
• HOW TO PROCEED WITH TROUBLESHOOTING
• Unable to Lock Steering Wheel
• DTC CHECK / CLEAR
• DIAGNOSTIC TROUBLE CODE CHART
• PROBLEM SYMPTOMS TABLE
• DATA LIST / ACTIVE TEST