PRE-COLLISION SYSTEM Pre-collision System Cancel Switch Circuit

DTC Code DTC Name
Pre-collision System Cancel Switch Circuit

DESCRIPTION

Each time the pre-collision system cancel switch assembly is pressed, the multi-information display sensitivity setting display changes and the sensitivity of the pre-collision system changes between 3 levels. Also, when the switch is pressed and held, the pre-collision system cancels.

WIRING DIAGRAM

E297408E74
E297408E75

CAUTION / NOTICE / HINT

Note:

  • When replacing the pre-collision city sensor, replace it with a new one and be sure to initialize the settings. If a pre-collision city sensor which was installed to another vehicle is used, the information stored in the pre-collision city sensor will not match the information from the vehicle and, as a result, a DTC may be stored.

  • If the pre-collision city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform Pre-collision City Sensor Optical Axis Learning.

    Tip:

    Pre-collision City Sensor Optical Axis Learning can be performed by using either One Time Recognition or Sequential Recognition.

    One Time Recognition:Click here

    Sequential Recognition:Click here

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY - PRE-COLLISION CITY SENSOR AND BODY GROUND)

    1. Disconnect the pre-collision system cancel switch assembly connector.

    2. Disconnect the M4 pre-collision city sensor connector.

    3. w/o Stop and start system:

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E57-4 (ECU) - M4-9 (PCSW)

      Always

      Below 1 Ω

      E57-1 (GND) - Body ground

      Always

      Below 1 Ω

      E57-4 (ECU) or M4-9 (PCSW)- Body ground

      Always

      100 kΩ or higher

    4. w/ Stop and start system:

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E56-4 (ECU) - M4-9 (PCSW)

      Always

      Below 1 Ω

      E56-3 (E) - Body ground

      Always

      Below 1 Ω

      E56-4 (ECU) or M4-9 (PCSW)- Body ground

      Always

      100 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY

    1. Remove the pre-collision system cancel switch assembly.

      Click here

    2. Inspect the pre-collision system cancel switch assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPLACE PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY

    Click here