PRE-COLLISION SYSTEM Pre-collision System Cancel Switch Circuit

DESCRIPTION

Each time the pre-collision system cancel switch assembly is pressed, the pre-collision system sensitivity indicator on the multi-information display changes and the sensitivity of the pre-collision system is changed in 3 levels. Pressing and holding the pre-collision system cancel switch assembly cancels the pre-collision system.

WIRING DIAGRAM

A01I3H6E06

INSPECTION PROCEDURE

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.

PROCEDURE


  1. READ VALUE USING TECHSTREAM (PCS OFF SWITCH)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / Pre-Collision 2 / Data List.

    5. Read the Data List according to the display on the Techstream.

      Pre-Collision 2
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      PCS OFF Switch Pre-collision system cancel switch assembly status/ON or OFF

      ON: Pre-collision system cancel switch assembly on

      OFF: Pre-collision system cancel switch assembly off

      		 -
      OK
      When the pre-collision system cancel switch assembly is operated, the display changes as shown above.

    NG

    INSPECT PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY Click here

    OK

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

  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.


    NG

    REPLACE PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY)


    1. Disconnect the I183 driving support ECU assembly connector.

    2. Disconnect the I180 pre-collision system cancel switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I183-5 (PBSW) - I180-8 Always Below 1 Ω
      I183-5 (PBSW) or I180-8 - Body ground Always 10 kΩ or higher

    4. Reconnect the I180 pre-collision system cancel switch assembly connector.

    5. Reconnect the I183 driving support ECU assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the I180 pre-collision system cancel switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I180-5 - Body ground Always Below 1 Ω

    3. Reconnect the I180 pre-collision system cancel switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here