PRE-CRASH SAFETY SYSTEM Pre-crash Safety System Cancel Switch Circuit

DESCRIPTION

The driving support ECU assembly receives a pre-crash system on/off signal from the pre-crash system cancel switch assembly.

WIRING DIAGRAM

A01FBCXE07
*a Pre-crash System Cancel Switch Assembly
*b Driving Support ECU Assembly

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.

PROCEDURE


  1. READ VALUE USING GTS (PCS OFF SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

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


      Body Electrical > Pre-Crash 2 > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      PCS OFF Switch Pre-crash system cancel switch assembly status ON or OFF

      ON: Pre-crash system cancel switch assembly on

      OFF: Pre-crash system cancel switch assembly off

      		 -

      Body Electrical > Pre-Crash 2 > Data List
      Tester Display
      PCS OFF Switch
      OK
      When the pre-crash system cancel switch assembly is operated, the display changes as shown above.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT PRE-CRASH SYSTEM CANCEL SWITCH ASSEMBLY


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

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

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PRE-CRASH SYSTEM CANCEL SWITCH ASSEMBLY

    OK

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


    1. Disconnect the Q1 driving support ECU assembly connector.

    2. Disconnect the O92 pre-crash 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
      Q1-5 (PBSW) - O92-2 Always Below 1 Ω
      Q1-5 (PBSW) or O92-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the O92 pre-crash 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
      O92-1 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR