LANE DEPARTURE ALERT SYSTEM Steering Pad Switch Circuit

DESCRIPTION



WIRING DIAGRAM

A01MYM3E02
A01MWB3E01
w/o Dynamic Radar Cruise Control System
*a LDA
*b Steering Pad Switch Assembly
*c Spiral with Sensor Cable Sub-assembly
*d Lane Departure Warning Camera

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.

Click here

PROCEDURE


  1. SYSTEM CHECK


    1. Confirm the vehicle specification.

      Result
      Result Proceed to
      w/ Dynamic Radar Cruise Control System A
      w/o Dynamic Radar Cruise Control System B

    B

    INSPECT STEERING PAD SWITCH ASSEMBLY Click here

    A

  2. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly.

      Click here

    2. Inspect the steering pad switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  3. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


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

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the K26 spiral with sensor cable sub-assembly connector.

    2. Disconnect the M1 driving support ECU assembly connector.

    3. Disconnect the S9 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
      K26-12 (DIST) - M1-6 (SPSW) Always Below 1 Ω
      K26-2 (ECC) - Body ground Always Below 1 Ω
      K26-12 (DIST) or M1-6 (SPSW) - 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.

      Click here

      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)

  7. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly.

      Click here

    2. Inspect the steering pad switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  8. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY


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

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the K26 spiral with sensor cable sub-assembly connector.

    2. Disconnect the S9 lane departure warning camera connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K26-12 (DIST) - S9-4 (LKSW) Always Below 1 Ω
      K26-2 (ECC) - Body ground Always Below 1 Ω
      K26-12 (DIST) or S9-4 (LKSW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR