STEERING LOCK SYSTEM Steering Lock Motor Drive Power Circuit

DESCRIPTION

The main body ECU supplies the power to activate the motor of the steering lock actuator.

The diagnosis information of the steering lock ECU is transmitted to the tester via the certification ECU as the steering lock ECU is not connected to the CAN communication system.

WIRING DIAGRAM

A01GLJEE02

INSPECTION PROCEDURE

Tech Tips

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following step to wake up the ECU:

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

Note

If the steering lock actuator (steering lock ECU) is replaced, with the engine switch off and the shift lever on P, open and close the driver side door to record the current lock position into the steering lock ECU. If this is not performed, the engine may not start.

PROCEDURE


  1. 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

    B

    CHECK STEERING LOCK ACTUATOR (IGE VOLTAGE) Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (CERTIFICATION ECU)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG) and press the intelligent tester main switch ON.

    3. Select the item "Lock/Unlock Receive" in the Data List within 10 seconds of starting the engine and read the value displayed on the intelligent tester.

      Entry & Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Lock/Unlock Receive Steering lock command reception record / YES or NO

      YES: Steering lock/unlock signal received

      NO: Steering lock/unlock signal not received

      		 -
      OK
      YES is displayed on the tester screen.

    NG

    CHECK ENTRY AND START SYSTEM Click here

    OK

  3. CHECK STEERING LOCK ACTUATOR

    A01GNJ4E01

    1. Immediately after turning the engine switch on (IG), measure the voltage between terminals L33-3 (IGE) and L33-2 (SGND) of the steering lock actuator.

      Result
      Result Proceed to
      Below 1 V A
      11 to 14 V (measured voltage never becomes below 1 V) B

    A

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    B

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

    A01GKN0E02

    1. Disconnect the L13 main body ECU connector.

    2. Disconnect the L33 steering lock actuator connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L33-3 (IGE) - L13-19 (SLR+) Always Below 1 Ω
      L33-3 (IGE) or L13-19 (SLR+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU

  5. CHECK STEERING LOCK ACTUATOR (IGE VOLTAGE)


    1. A01GNJ4E01

      Shift the shift lever to the P position.

    2. Turn the engine switch off.

    3. Open the driver side door.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      L33-3 (IGE) - L33-2 (SGND) Steering lock motor is operating Below 1 V
      Steering lock motor is not operating 11 to 14 V

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

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

    A01GKN0E02

    1. Disconnect the L13 main body ECU connector.

    2. Disconnect the L33 steering lock actuator connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L33-3 (IGE) - L13-19 (SLR+) Always Below 1 Ω
      L33-3 (IGE) or L13-19 (SLR+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU