LANE DEPARTURE ALERT SYSTEM Steering Pad Switch Circuit

DESCRIPTION

The lane departure warning camera receives a lane departure alert main switch signal from the steering pad switch assembly.



WIRING DIAGRAM

A0000C3E01
A0001H3E01
w/o Dynamic Radar Cruise Control System
*a LDA
*b Steering Pad Switch Assembly (Lane Departure Alert Main Switch)
*c Spiral with Sensor Cable Sub-assembly
*d Lane Departure Warning Camera

CAUTION / NOTICE / HINT

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.

  • 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 Systems.

    Click here

  • When the lane departure warning camera is replaced with a new one or it is removed, adjustment of the lane departure warning camera axis must be performed.

    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 (LANE DEPARTURE ALERT MAIN SWITCH) Click here

    A

  2. INSPECT STEERING PAD SWITCH ASSEMBLY (LANE DEPARTURE ALERT MAIN SWITCH)


    1. Remove the steering pad switch assembly (lane departure alert main switch).

      Click here

    2. Inspect the steering pad switch assembly (lane departure alert main switch).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY (LANE DEPARTURE ALERT MAIN SWITCH) 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 - LANE DEPARTURE WARNING CAMERA AND DRIVING SUPPORT ECU ASSEMBLY)


    1. Disconnect the I4 spiral with sensor cable sub-assembly connector.

    2. Disconnect the T10 lane departure warning camera connector.

    3. Disconnect the I19 driving support ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I4-12 (DIST) - T10-4 (LKSW) Always Below 1 Ω
      I4-2 (ECC) - Body ground Always Below 1 Ω
      I4-12 (DIST) - I19-6 (SPSW) Always Below 1 Ω
      I4-12 (DIST) or T10-4 (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.

      Click here

      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 (LANE DEPARTURE ALERT MAIN SWITCH)


    1. Remove the steering pad switch assembly (lane departure alert main switch).

      Click here

    2. Inspect the steering pad switch assembly (lane departure alert main switch).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY (LANE DEPARTURE ALERT MAIN SWITCH) 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 DEPATURE WARNING CAMERA)


    1. Disconnect the I4 spiral with sensor cable sub-assembly connector.

    2. Disconnect the T10 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
      I4-12 (DIST) - T10-4 (LKSW) Always Below 1 Ω
      I4-2 (ECC) - Body ground Always Below 1 Ω
      I4-12 (DIST) or T10-4 (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