LANE DEPARTURE ALERT SYSTEM Main Switch Circuit

DESCRIPTION


The lane departure warning camera receives a lane departure alert main switch*1 or lane-keeping assist main switch*2 signal from the telltale light assembly (lane departure alert main switch).

WIRING DIAGRAM

A01CY21E01

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for LHD A
      for RHD B

    B

    CHECK HARNESS AND CONNECTOR (LANE-KEEPING ASSIST MAIN SWITCH - LANE DEPARTURE WARNING CAMERA AND BODY GROUND) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY [LANE DEPARTURE ALERT MAIN SWITCH] - LANE DEPARTURE WARNING CAMERA AND BODY GROUND)


    1. Disconnect the G43 telltale light assembly (lane departure alert main switch) connector.

    2. Disconnect the Q13 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
      G43-6 (ECU) - Q13-4 (LKSW) Always Below 1 Ω
      G43-6 (ECU) - Body ground Always 10 kΩ or higher
      G43-13 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT TELLTALE LIGHT ASSEMBLY


    1. Remove the telltale light assembly.

      Click here

    2. Inspect the telltale light assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (LANE-KEEPING ASSIST MAIN SWITCH - LANE DEPARTURE WARNING CAMERA AND BODY GROUND)


    1. Disconnect the G160 lane-keeping assist main switch connector.

    2. Disconnect the Q13 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
      G160-6 (ECU) - Q13-4 (LKSW) Always Below 1 Ω
      G160-6 (ECU) - Body ground Always 10 kΩ or higher
      G160-3 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT LANE-KEEPING ASSIST MAIN SWITCH


    1. Remove the lane-keeping assist main switch.

      Click here

    2. Inspect the lane-keeping assist main switch.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE LANE-KEEPING ASSIST MAIN SWITCH Click here