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STEERING LOCK SYSTEM Steering Lock Motor Drive Power Circuit

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DTC Code DTC Name
  Steering Lock Motor Drive Power Circuit
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DESCRIPTION

The steering lock ECU is connected to the main body ECU and certification ECU (smart key ECU assembly). The steering lock ECU cannot activate the motor unless it receives permission signals from both ECUs. (The main body ECU permits the steering lock ECU to supply power to activate the motor.)

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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    CHECK VEHICLE CONDITION


    1. Check the problem symptom of the steering lock system.

      Result
      Condition Proceed to
      Steering lock cannot be released A
      Steering cannot be locked B

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    READ VALUE USING INTELLIGENT TESTER


    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 / Entry & Start / Data List.

    6. Select the item below in the Data List, and read its value displayed on the intelligent tester.

      Table 1. Entry & Start:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Lck/Unlck Rec Steering lock command reception record / YES or NO

      YES: Steering lock / unlock signal received

      NO: Steering lock / unlock signal not received

      		 -

    7. Check if a steering unlock command signal has been received.

      OK
      "YES" is displayed on the tester display.

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    INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    1. A017B0LE13

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      D10-3 (IGE) - D10-1 (GND)

      1. Engine switch off

      2. Engine switch on (ACC or IG)

      • Motor activated: Below 1 V

      • Motor not activated:

        11 to 14 V

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    CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)


    1. A017EOEE15

      Disconnect the D10 connector from the steering lock actuator assembly.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      D10-1 (GND) - Body ground Always Below 1 Ω

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    CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - MAIN BODY ECU)


    1. A017BMNE03

      Disconnect the D7 connector from the main body ECU.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      D10-3 (IGE) - D7-19 (SLR+) Always Below 1 Ω
      D10-3 (IGE) - Body ground Always 10 kΩ or higher

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    INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    1. A017B0LE15

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

      Standard voltage
      Tester Connection Condition Specified Condition
      D10-3 (IGE) - D10-1 (GND)

      The specified condition should be checked after performing the following:


      1. Move the shift lever to the N position

      2. Turn the engine switch off

      3. Open the driver's door

      • Motor activated: Below 1 V

      • Motor not activated:

        11 to 14 V

  7. Click here

    CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - MAIN BODY ECU)


    1. A017BMNE03

      Disconnect the D10 connector from the steering lock actuator assembly.

    2. Disconnect the D7 connector from the main body ECU.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      D10-3 (IGE) - D7-19 (SLR+) Always Below 1 Ω
      D10-3 (IGE) - Body ground Always 10 kΩ or higher

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    CHECK SMART ENTRY AND START SYSTEMClick here

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    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

  10. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE MAIN BODY ECU