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

DESCRIPTION

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

WIRING DIAGRAM

A005CCDE08
*a Pre-Crash System Cancel Switch Assembly
*b Combination Meter Sub-assembly
*c Driving Support ECU Assembly

PROCEDURE


  1. READ VALUE USING GTS (PRE-CRASH SYSTEM CANCEL SWITCH ASSEMBLY)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. Read the display on the GTS.

      Pre-Crash 2
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Pre-Crash Brake OFF Switch Pre-crash system cancel switch assembly signal/ON or OFF

      ON: Pre-crash system cancel switch assembly on

      OFF: Pre-crash system cancel switch assembly off

      		 -
      OK
      On screen, each item changes between ON and OFF according to above chart.

    OK

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

    NG

  2. INSPECT PRE-CRASH SYSTEM CANCEL SWITCH ASSEMBLY


    1. A005C6HE01
      Text in Illustration
      *a

      Component without harness connected

      (Pre-crash system cancel switch assembly)

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

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Pressed Below 1 Ω
      Not pressed 10 kΩ or higher

    NG

    REPLACE PRE-CRASH SYSTEM CANCEL SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the L60 driving support ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L108-1 (ECU) - L60-5 (PBSW) Always Below 1 Ω
      L108-1 (ECU) - Body ground Always 10 kΩ or higher
      L108-2 (GND) - Body ground Always Below 1 Ω
      L60-25 (GND) - Body ground Always Below 1 Ω

    OK

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-CRASH SYSTEM CANCEL SWITCH - DRIVING SUPPORT ECU)