LANE DEPARTURE ALERT SYSTEM Steering Pad Switch Circuit

DESCRIPTION

The driving support ECU receives a lane departure alert main switch signal from the steering pad switch assembly and sends the signal to the lane departure warning camera via CAN communication.

WIRING DIAGRAM

A01MG5CE01

CAUTION / NOTICE / HINT

Note

The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

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PROCEDURE


  1. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly.

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    2. Inspect the steering pad switch assembly.

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      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  2. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


    1. Remove the spiral cable with sensor sub-assembly.

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    2. Inspect the spiral cable with sensor sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - DRIVING SUPPORT ECU ASSEMBLY)


    1. Disconnect the G17 spiral cable with sensor sub-assembly connector.

    2. Disconnect the G72 driving support ECU assembly connector.

    3. Disconnect the W7 lane departure warning camera connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G17-12 (DIST) - G72-6 (SPSW) Always Below 1 Ω
      G17-2 (ECC) - Body ground Always Below 1 Ω
      G17-12 (DIST) or G72-6 (SPSW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - LANE DEPARTURE WARNING CAMERA)


    1. Disconnect the G17 spiral cable with sensor sub-assembly connector.

    2. Disconnect the G72 driving support ECU assembly connector.

    3. Disconnect the W7 lane departure warning camera connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G17-12 (DIST) - W7-4 (LKSW) Always Below 1 Ω
      G17-2 (ECC) - Body ground Always Below 1 Ω
      G17-12 (DIST) or W7-4 (LKSW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE DRIVING SUPPORT ECU ASSEMBLY


    1. Replace the driving support ECU assembly with a new one.


      Note

      When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK LANE DEPARTURE ALERT SYSTEM (LANE DEPARTURE ALERT INDICATOR)


    1. Check that the lane departure alert indicator illuminates on the combination meter assembly when the lane departure alert system is turned on the lane departure alert main switch.

      Result
      Result Proceed to
      The lane departure alert indicator illuminates on the combination meter assembly when the lane departure alert system is turned on using the lane departure alert main switch A
      The lane departure alert indicator does not illuminate on the combination meter assembly when the lane departure alert system is turned on using the lane departure alert main switch B

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    B

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)