LANE DEPARTURE ALERT SYSTEM Steering Pad Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

A01XBJ7E04

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.

  • 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.

PROCEDURE


  1. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. Remove the steering pad switch assembly Click here.

    2. Inspect the steering pad switch assembly Click here.


    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  2. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Remove the spiral cable sub-assembly Click here.

    2. Inspect the spiral cable sub-assembly Click here.


    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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


    1. Disconnect the E122 spiral cable sub-assembly connector.

    2. Disconnect the E164 driving support ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E122-12 (DIST) - E164-23 (SPSW) Always Below 1 Ω
      E122-12 (DIST) or E164-23 (SPSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM OR BODY GROUND)


    1. for 3UR-FE:


      1. Disconnect the E122 spiral cable sub-assembly connector.

      2. Disconnect the A38 ECM connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        E122-2 (ECC) - A38-59 (ECCS) Always Below 1 Ω

    2. except 3UR-FE:


      1. Disconnect the E122 spiral cable sub-assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        E122-2 (ECC) - Body ground Always Below 1 Ω

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR