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

DESCRIPTION

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

WIRING DIAGRAM

B0045EAE47
*a PCSW
*b Pre-crash System Cancel Switch Assembly
*c Pre-crash Safety City Sensor

CAUTION / NOTICE / HINT

Note


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

  • If the pre-crash safety city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.

  • Perform adjustment using "ONE TIME RECOGNITION" or "SEQUENTIAL RECOGNITION".


PROCEDURE


  1. READ VALUE USING GTS


    1. Using the GTS, read the Data List Click here.

      PCS/LDA/RSA/LVN
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      PCS Operation State Retention Setting Displays pre-crash safety system operation status retained settings / ON or OFF

      ON: Pre-crash safety system operable

      OFF: Pre-crash safety system inoperable

      		 -
      PCS Alarm Activation Distance Retention Setting 1 Displays status of pre-crash safety warning operation distance retention setting 1 / ON or OFF

      ON: Pre-crash safety system warning operation distance "far"

      OFF: Pre-crash safety system warning operation distance other than "far"

      		 -
      PCS Alarm Activation Distance Retention Setting 2 Displays status of pre-crash safety warning operation distance retention setting 2 / ON or OFF

      ON: Pre-crash safety system warning operation distance "normal"

      OFF: Pre-crash safety system warning operation distance other than "normal"

      		 -
      PCS Alarm Activation Distance Retention Setting 3 Displays status of pre-crash safety warning operation distance retention setting 3 / ON or OFF

      ON: Pre-crash safety system warning operation distance "near"

      OFF: Pre-crash safety system warning operation distance other than "near"

      		 -

      Tech Tips

      Refer to the OPERATION CHECK for operation of the of pre-crash system cancel switch assembly Click here.

      Result
      Result Proceed to
      Pressing the pre-crash system cancel switch assembly turns the pre-crash safety system on and off and switches the operation distance A
      Pressing the pre-crash system cancel switch assembly does not turn the pre-crash safety system on and off and switch the operation distance B

    A

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

    B

  2. INSPECT PRE-CRASH SYSTEM CANCEL SWITCH ASSEMBLY


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

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


    NG

    REPLACE PRE-CRASH SYSTEM CANCEL SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (PRE-CRASH SYSTEM CANCEL SWITCH ASSEMBLY - PRE-CRASH SAFETY CITY SENSOR AND BODY GROUND)


    1. Disconnect the F132 pre-crash system cancel switch assembly connector.

    2. Disconnect the L12 pre-crash safety city sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F132-8 (ECU) - L12-9 (PCSW) Always Below 1 Ω
      F132-5 (GND) - Body ground Always Below 1 Ω
      F132-8 (ECU) - Body ground Always 10 kΩ or higher

    OK

    REPLACE PRE-CRASH SAFETY CITY SENSOR Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR